MGE UPS Systems Power Supply EPS 6000 User Manual
EPS 6000 UPS  
Shared Systems  
User’s Guide  
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prepared for:  
EPS 6000  
Shared Systems  
User’s Guide  
For service call  
1-800-438-7373  
86-130034-00 B00 11/96  
Copyright © 1996 MGE UPS Systems, Inc..  
All rights reserved. Printed in U.S.A.  
MGE UPS Systems  
1660 Scenic Avenue  
Costa Mesa, CA 92626  
(714) 557-1636  
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EPS 6000 UPS  
Shared Systems  
User’s Guide  
Warranty  
Seller warrants to the Ultimate Purchaser (the purchaser who buys for use, and not for resale) that all products  
furnished under this order and which are manufactured by Seller will conform to final specifications, drawings, samples  
and other written descriptions approved in writing by Seller, and will be free from defects in materials and workmanship.  
These warranties shall remain in effect for period of twelve (12) months after delivery to the Ultimate Purchaser. But if the  
Seller installs the equipment or supplies technical direction of installation by contract, said one year shall run from the  
completion of installation, provided installation is not unreasonably delayed by Ultimate Purchaser. Parts replaced or  
repaired in the warrant period shall carry the unexpired portion of the original warranty. A unit placed with the Purchaser  
on consignment and then later purchased will be warranted for twelve (12) months from the time the Seller receives notifi-  
cation of the Purchaser’s intent to purchase said consigned item. The foregoing in its entirety is subject to the provision  
that in no case will the total warranty period extend beyond 18 months from date Seller ships equipment from point of  
manufacture.  
The liability of Seller hereunder is limited to replacing or repairing at Seller’s factory or on the job site at Seller’s  
option, any part or parts which have been returned to the Seller and which are defective or do not conform to such speci-  
fications, drawings or other written descriptions; provided that such part or parts are returned by the Ultimate Purchaser  
within ninety (90) days after such defect is discovered. The Seller shall have the sole right to determine if the parts are to  
be repaired at the job site or whether they are to be returned to the factory for repair or replacement. All items returned to  
Seller for repair or replacement must be sent freight prepaid to its factory. Purchaser must obtain Seller’s Return Goods  
Authorization prior to returning items. The above conditions must be met if warranty is to be valid. Seller will not be liable  
for any damage done by unauthorized repair work, unauthorized replacement parts, from any misapplication of the item,  
or for damage due to accident, abuse, or Act of God.  
In no event shall the Seller be liable for loss, damage, or expense directly or indirectly arising from the use of the  
units, or from any other cause, except as expressly stated in this warranty. Seller makes no warranties, express or  
implied, including any warranty as to merchantability or fitness for a particular purpose or use. Seller is not liable for and  
Purchaser waives any right of action it has or may have against Seller for any consequential or special damages arising  
out of any breach of warranty, and for any damages Purchaser may claim for damage to any property or injury or death to  
any person arising out of its purchase of the use, operation or maintenance of the product. Seller will not be liable for any  
labor subcontracted or performed by Purchaser for preparation of warranted item for return to Seller’s factory or for  
preparation work for field repair or replacement. Invoicing of Seller for labor either performed or subcontracted by  
Purchaser will not be considered as a liability by the Seller.  
This warranty shall be exclusive of any and all other warranties express or implied and may be modified only by a  
writing signed by an officer of the Seller. This warranty shall extend to the Ultimate Purchaser but to no one else.  
Accessories supplied by Seller, but manufactured by others, carry any warranty the manufacturers have made to Seller  
and which can be passed on to Ultimate Purchaser.  
Seller makes no warranty with respect to whether the products sold hereunder infringe any patent, U.S. or foreign,  
and Buyer represents that any specially ordered products do not infringe any patent. Buyer agrees to indemnify and hold  
Seller harmless from any liability by virtue of any patent claims where Buyer has ordered a product conforming to Buyer’s  
specifications, or conforming to Buyer’s specific design.  
Buyer has not relied and shall not rely on any oral representation regarding the Product sold hereunder and any oral  
representation shall not bind Seller and shall not be part of any warranty.  
There are no warranties which extend beyond the description on the face hereof. In no event shall MGE UPS  
Systems, Inc. be responsible for consequential damages or for any damages except as expressly stated herein.  
Service and Factory Repair - Call 1 - 800 - 438 - 7373  
Direct questions about the operation, repair, or servicing of this equipment to MGE UPS Systems, Inc. Customer  
Support Services. Include the part number, assembly number, and serial number of the unit in any correspondence.  
Should you require factory service for your equipment, contact MGE UPS Systems, Inc. Customer Support Services and  
obtain a Return Goods Authorization (RGA) prior to shipping your unit. Never ship equipment to MGE UPS Systems, Inc.  
without first obtaining an RGA.  
Proprietary Rights Statement  
The information in this manual is the property of MGE UPS Systems, Inc., and represents a proprietary article in  
which MGE UPS Systems, Inc., retains any and all patent rights, including exclusive rights of use and/or manufacture  
and/or sale. Possession of this information does not convey any permission to reproduce, print, or manufacture the article  
or articles shown herein. Such permission may be granted only by specific written authorization, signed by an officer of  
MGE UPS Systems, Inc.  
IBM, PC-AT, ES/9000, and AS/400 are trademarks of International Business Machines Corporation. MGE and MGE  
UPS Systems are trademarks of MGE UPS Systems, Inc. Other trademarks that may be used herein are owned by their  
respective companies and are referred to in an editorial fashion only.  
Revision History  
EPS 6000 Uninterruptible Power System Installation Manual  
86-130034-00  
Copyright © 1996 MGE UPS Systems. All rights reserved. Printed in U.S.A.  
Revision: B00  
11/96  
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Contents  
Section I  
Introduction  
1.0 . . . . . . . . . . . . . . . Scope  
1 — 1  
1 — 1  
1.1 . . . . . . . . . . . . . . . General Description  
1.2 . . . . . . . . . . . . . . . Description of UPS Module  
Major Internal Components  
1 — 4  
1 — 4  
1 — 4  
1 — 4  
1 — 4  
1.2.1  
1.2.2  
1.2.3  
1.2.4  
Rectifier/Battery Charger  
Inverter  
Inverter Transformer  
Battery System  
1.3 . . . . . . . . . . . . . . . Description of SSC  
Major Internal Components  
1.4 . . . . . . . . . . . . . . . Options  
1.5 . . . . . . . . . . . . . . . Specifications, UPS Modules  
1 — 5  
1 — 13  
1 — 13  
1 — 13  
1 — 14  
1 — 15  
1.5.1  
1.5.2  
1.5.3  
Electrical  
Mechanical  
Environmental  
1.6 . . . . . . . . . . . . . . . Specifications,  
Static Switch Cabinet  
Electrical  
1 — 15  
1 — 15  
1 — 16  
1 — 12  
1.6.1  
1.6.2  
1.6.2  
Mechanical  
Mechanical  
Section II  
Operation  
2.0 . . . . . . . . . . . . . . . Scope  
2.1 . . . . . . . . . . . . . . . System Operation Overview  
2 — 1  
2 — 1  
Static Switch Cabinet Operation 2 — 1  
2.1.1  
2.1.2  
2.1.3  
Normal Operation  
On-Battery Operation  
2 — 2  
2 — 2  
2 — 3  
2 — 3  
2.2 . . . . . . . . . . . . . . . Indicators and Controls  
2.2.1  
2.2.2  
Front Panel  
Alphanumeric Display  
and Controls  
Hidden Panel  
2 — 6  
2 — 9  
2.2.3  
2.2.4  
Circuit Breakers,  
Contactors and Switches  
2.3 . . . . . . . . . . . . . . . Using the Alphanumeric Display 2 — 23  
2 — 13  
2.3.1  
2.3.2  
2.3.3  
2.3.3.1  
2.3.3.2  
2.3.3.3  
Settings  
Alarms  
Measurements  
Voltage Measurements  
Current Measurements  
Power and  
2 — 24  
2 — 25  
2 — 26  
2 — 26  
2 — 27  
Frequency Measurements  
Battery Measurements  
2 — 28  
2 — 29  
2.3.3.4  
iii  
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EPS 6000 UPS Shared Systems  
section  
2.4 . . . . . . . . . . . . . . . Normal Operating Procedures  
description  
page number  
2 — 29  
2 — 29  
2 — 30  
2 — 31  
2 — 32  
2.4.1  
2.4.2  
2.4.3  
2.4.4  
2.4.4.1  
Checks Before Start-up  
Start-up  
Checks After Start-up  
Shut-down  
Emergency Shutdown  
Using EPO  
2 — 32  
2 — 33  
2 — 33  
2.4.4.2  
2.4.5  
2.4.5.1  
Normal Shutdown  
Isolation for Maintenance  
Isolation of an  
Individual UPS Module  
Isolation of  
2 — 33  
2.4.5.2  
Static Switch Cabinet (SSC)  
Without Maintenance Bypass  
With Maintenance Bypass  
Forced Transfers  
2 — 35  
2 — 35  
2 — 35  
2 — 36  
2.4.5.2.1  
2.4.5.2.2  
2.4.6  
2.4.6.1  
Uninterrupted  
Transfer Conditions  
Forced Transfer From  
Bypass AC Input Source  
to Inverter  
2 — 36  
2.4.6.2  
2 — 37  
2.4.6.3 Forced UPS Module Shut Down 2 — 37  
2.5 . . . . . . . . . . . . . . . LCD Messages 2 — 37  
Section III  
Maintenance and Service  
3.0 . . . . . . . . . . . . . . . Scope  
3 — 1  
3 — 1  
3 — 1  
3 — 2  
3.1 . . . . . . . . . . . . . . . Safety Instructions  
3.2 . . . . . . . . . . . . . . . Preventive Maintenance  
3.3 . . . . . . . . . . . . . . . Replacement Parts  
3.4 . . . . . . . . . . . . . . . Troubleshooting and  
MGE Servicing  
3 — 3  
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . g — 1  
iv  
Contents  
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User’s guide  
Illustrations  
figure  
description  
page number  
1-1 . . . . . . . . . . . . . . . Pictorial, Typical EPS 6000 UPS  
Shared Installation  
(Shown With Two 375 kVA  
UPS Modules)  
1-2 . . . . . . . . . . . . . . . Single-Line Diagram,  
Typical EPS 6000 UPS  
Shared Installation  
1 — 3  
1 — 3  
1-3 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 150 - 225 kVA  
UPS Modules  
1 — 5  
1 — 6  
1-4 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 375 kVA UPS Modules  
1-5 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 500 kVA UPS  
I/O Cabinet  
1 — 7  
1 — 8  
1-6 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 500 kVA UPS Cabinet  
1-7 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 750 kVA UPS Cabinet 1 1 — 9  
1-8 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 750 kVA UPS Cabinet 2 1 — 10  
1-9 . . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 750 kVA UPS  
Cabinet 3  
1 — 11  
1-10 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Static Switch Cabinet (SSC)  
2-1 . . . . . . . . . . . . . . . Power Flow, Normal Operation  
2-2 . . . . . . . . . . . . . . . Power Flow,  
On-Battery Operation  
2-3 . . . . . . . . . . . . . . . Power Flow, Bypass Operation  
2-4 . . . . . . . . . . . . . . . EPS 6000  
Controls and Indicators  
2-5 . . . . . . . . . . . . . . . EPS 6000 Front Panel  
2-6 . . . . . . . . . . . . . . . Alphanumeric Display  
and Controls  
1 — 12  
2 — 1  
2 — 2  
2 — 3  
2 — 4  
2 — 4  
2 — 7  
2 — 9  
2 — 12  
2-7 . . . . . . . . . . . . . . . Hidden Panel  
2-8 . . . . . . . . . . . . . . . Hidden Panel Pushbuttons  
Contents  
v
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EPS 6000 UPS Shared Systems  
2-9 . . . . . . . . . . . . . . . Single-Line Diagram,  
Typical EPS 6000 UPS  
Shared Installation  
2-10 . . . . . . . . . . . . . . EPS 6000  
2 — 14  
2 — 15  
2 — 16  
2 — 17  
2 — 18  
2 — 19  
2 — 20  
2 — 21  
Major Internal Components,  
Shared 150 - 225 kVA  
UPS Module  
2-11 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 300 / 375 kVA  
UPS Module  
2-12 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 500 kVA UPS Module  
I/O Cabinet  
2-13 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 500 kVA UPS Module  
UPS Cabinet  
2-14 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 750 kVA UPS Module  
UPS Cabinet 1  
2-15 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 750 kVA UPS Module  
UPS Cabinet 2  
2-16 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Shared 750 kVA UPS Module  
UPS Cabinet 3  
2-17 . . . . . . . . . . . . . . EPS 6000  
Major Internal Components,  
Static Switch Cabinet (SSC)  
2 — 22  
2 — 23  
2 — 24  
2 — 24  
2 — 25  
2 — 26  
2 — 27  
2-18 . . . . . . . . . . . . . . Alphanumeric Display  
2-19 . . . . . . . . . . . . . . General Display Configuration  
2-20 . . . . . . . . . . . . . . Display Settings Display  
2-21 . . . . . . . . . . . . . . Displaying Alarm Messages  
2-22 . . . . . . . . . . . . . . Voltage Measurements  
2-23 . . . . . . . . . . . . . . Current Measurements  
2-24 . . . . . . . . . . . . . . Power and  
Frequency Measurements  
2-25 . . . . . . . . . . . . . . Battery Measurements  
2 — 28  
2 — 29  
vi  
Contents  
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User’s guide  
Tables  
table description  
1-1 . . . . . . . . . . . . . . . EPS 6000 Model Numbers,  
page number  
Shared System UPS Modules  
1-2 . . . . . . . . . . . . . . . EPS 6000 Model Numbers,  
Static Switch Cabinets (SSC)  
1 — 2  
1 — 2  
Contents  
vii  
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EPS 6000 UPS Shared Systems  
How to use this manual  
This manual is designed for ease of use and easy location  
of information.  
To quickly find the meaning of terms used within the text, look in the Glossary.  
This manual uses Noteboxes to convey important information. Noteboxes come in four  
varieties:  
WARNING  
CAUTION  
A
WARNING  
indicates information  
provided to protect the  
user and service  
notebox  
A
CAUTION notebox  
indicates infor mation  
provided to protect the  
u s e r  
p e r s o n n e l  
p o s s i bl e  
damage.  
a n d  
s e r v i c e  
a g a i n s t  
personnel against safety  
hazards and/or possible  
equipment damage  
e q u i p m e n t  
IMPORTANT  
NOTE  
An IMPORTANT notebox  
A
N OT E  
indicates infor mation  
p r ov i d e d a s a n  
n o t e b ox  
indicates  
information  
provided as an operating  
instruction, or as an  
operating tip.  
operating tip or an  
equipment feature.  
viii  
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Introduction  
1.0  
Scope  
This manual provides technical information required for  
operation and maintenance of the shared EPS 6000  
uninterruptible power system (UPS). Please read this manual before operating the EPS 6000  
equipment. Please retain this manual for future reference.  
The manual is divided into three sections:  
Section I — General Description  
This section introduces the EPS 6000 family of uninterruptible power systems, including a  
general description of the system and its internal components, a description of available  
options, and system specifications.  
Section II — Operation  
This section describes operating information for EPS 6000 UPS shared systems, including  
an overview of the system, its components, and their function; a description of the  
indicators and controls and their function; and operational sequences to be followed for all  
conditions of normal, emergency, and maintenance operation.  
Section III — Maintenance and Service  
This section describes maintenance of the EPS 6000 UPS, including safety instructions,  
preventive maintenance, information about replacement parts, and customer service.  
A Glossary in the rear of this manual provides definitions of terms used within the text. A  
separate manual, EPS 6000 UPS Installation Manual (MGE part number 86-130035-00)  
provides detailed installation instructions.  
1.1  
General Description EPS 6000 is a family of compact, high-efficiency uninter-  
ruptible power systems, available in power ratings up to  
1,500 kVA. EPS 6000 UPS are optimized for compatibility with non-linear computer-type  
loads. Computer-aided UPS diagnostics and modular construction assures that any required  
service on the UPS can be identified and completed rapidly. Remote system monitoring,  
remote annunciation of UPS performance signals, and telecommunication capabilities allow  
total control of the UPS by the user.  
The EPS 6000 UPS, SSC, battery, and all auxiliary equipment is listed for safety by  
Underwriter’s Laboratories, Inc. (UL) under UL Standard 1778; and under  
Canadian Standards Association (CSA) standard C22.107.  
Major components of the EPS 6000 UPS family include:  
•
•
•
•
EPS 6000 UPS module  
EPS 6000 SSC static switch cabinet  
EPS 6000 SSC maintenance bypass cabinet  
EPS 6000 auxiliary cabinet  
1 — 1  
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EPS 6000 UPS Shared Systems  
•
EPS 6000 battery cabinet  
Each of these cabinets is described below. Figure 1-1 shows a typical shared UPS  
installation, consisting of one static switch cabinet (SSC), two UPS modules, and two adjacent  
battery cabinets. Figure 1-2 shows a single-line diagram of the same  
shared UPS installation. Table 1-1 identifies EPS 6000 UPS model numbers for modules  
used in shared systems, and Table 1-2 identifies EPS 6000 SSC model numbers.  
Table  
1-1  
EPS 6000 Model Numbers, Shared System UPS Modules  
INPUT  
VOLTAGE  
(VAC)  
OUTPUT OUTPUT  
VOLTAGE RATING  
HEAT  
LOSS  
(Btu/hr)  
MODEL  
NUMBER  
INPUT CB TOTAL WIDTH TOTAL  
(Amps)  
(mm/in)  
WEIGHT (kg/lb)  
(VAC)  
(kVA/kW)  
EPS-6150/44,66P  
EPS-6225/44,66P  
EPS-6300/44,66P  
EPS-6375/44,66P  
EPS-6500/44,66P  
EPS-6750/44,66P  
480  
480  
480  
480  
480  
480  
480  
480  
480  
480  
480  
480  
150/120 400  
225/180 400  
300/240 600  
375/300 700  
500/400 1000  
750/600 1600  
2,010/81.5  
2,010/81.5  
2,010/81.5  
2,010/81.5  
2,865/113  
4,900/195  
2,044/4,508  
2,044/4,508  
2,514/5,543  
2,545/5,612  
4,244/7,211  
30,818  
39,202  
52,269  
65,336  
79,453  
6,000/13,200 131,000  
NOTES:  
1. Total width, weight, and heat loss are for system line-up including auxiliary cabinets but excluding pallets.  
2. Data does not include battery data; refer to the installation drawings supplied with your equipment.  
3. Information provided is for standard configurations; data may change with optional equipment. Consult the  
installation drawings provided with your equipment.  
Table  
1-2  
EPS 6000 Model Numbers, Static Switch Cabinets (SSC)  
INPUT  
OUTPUT  
OUTPUT  
TOTAL  
WIDTH  
TOTAL  
HEAT  
MODEL  
INPUT CB  
(Amperes)  
VOLTAGE VOLTAGE RATING  
WEIGHT  
(mm/in) (kg/lb)  
LOSS  
(Btu/hr)  
NUMBER  
(VAC)  
(VAC)  
kVA/kW  
SSC1500  
480  
480  
1500/1200 2000  
1829/72 1317/2900 (Negligible)  
1 — 2  
Introduction  
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User’s guide  
Figure Pictorial, Typical EPS 6000 UPS Shared Installation  
1-1  
(Shown With Two 375 kVA UPS Modules)  
MAINTENANCE  
BYPASS  
CABINET  
(OPTIONAL)  
STATIC SWITCH  
CABINET (SSC)  
BATTERY  
CABINET  
EPS 6000  
UPS MODULE  
AUXILIARY  
CABINET  
Figure Single-Line Diagram, Typical EPS 6000 UPS Shared Installation  
MAINTENANCE  
BYPASS  
AC INPUT  
1-2  
STATIC SWITCH  
CABINET  
MAINTENANCE  
BYPASS CABINET  
(OPTIONAL)  
STATIC SWITCH  
Q38P  
Q5N  
Q4S  
(CUSTOMER  
SUPPLIED)  
Q2S  
TO  
ATTACHED  
LOAD  
BYPASS  
AC INPUT/  
MAINS 2  
EPS 6000 UPS MODULE  
STATIC SWITCH  
INVERTER  
FROM ADDITIONAL  
UPS MODULES  
Q1  
Q5N  
K3N  
MAIN  
AC INPUT/  
MAINS 1  
INPUT  
FUSES  
OUTPUT  
FUSES  
RECTIFIER/  
CHARGER  
EPS 6000  
BATTERY  
CABINET  
QF1  
EPS 6000 UPS MODULE  
STATIC SWITCH  
INVERTER  
Q1  
Q5N  
K3N  
INPUT  
FUSES  
OUTPUT  
FUSES  
RECTIFIER/  
CHARGER  
EPS 6000  
BATTERY  
CABINET  
QF1  
Introduction  
1 — 3  
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EPS 6000 UPS Shared Systems  
1.2  
Description of UPS  
Module Major  
Internal  
Following is a description of the EPS 6000 UPS major  
internal components. Refer to the single-line diagram  
provided in Figure 1-2, and the component locators  
provided in Figure 1-3 through Figure 1-10  
Components  
1.2.1 Rectifier/Battery  
The rectifier/battery charger converts the AC input voltage  
from the utility source into a DC voltage, supplying the  
inverter and regulating the charge of the battery system. A  
capacitor bank filters the DC voltage.  
Charger  
1.2.2 Inverter  
The inverter chops the DC voltage supplied from either the  
rectifier/battery charger or the battery system into a three-  
phase AC voltage. An AC output filter is used to achieve a computer-grade sinewave output  
voltage waveform, with a total harmonic distortion of less than 2% under linear-load conditions.  
1.2.3 Inverter  
During normal operation, the inverter transformer provides  
complete electrical isolation between the UPS output to the  
attached load and the utility power source input as well as  
the UPS battery source.  
Transformer  
1.2.4 Battery System  
The battery system stores energy for use by the inverter.  
The stored energy is utilized in the event that the AC input  
power from the utility source fails, or falls outside of acceptable tolerance.  
The battery system may be an MGE battery cabinet designed for operation with the EPS 6000  
UPS, or a customer-supplied battery installation.  
MGE-supplied EPS 6000 battery cabinets may be a provided as stand-alone enclosures, or as  
enclosures designed to be mounted adjacent to the EPS 6000 UPS module.  
The EPS 6000 comes with a special battery ambient temperature sensor which allows the  
optimization of the DC voltage level as a function of the temperature, ensuring that the battery  
is properly charged and preserving its longevity.  
1 — 4  
Introduction  
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User’s guide  
1.3  
Description of SSC  
Major Internal  
Components  
The static switch cabinet (SSC) provides an electrical path  
between the output of the UPS modules and the load.  
When the UPS modules are off, the SSC provides power to  
the load from the bypass AC input source (mains 2). Up to  
six (6) modules can be connected to the SSC, supporting  
loads as great as 1,500 kVA. UPS modules may be turned  
off individually for maintenance, provided that the remaining modules can support the load.  
The SSC incorporates a static bypass switch. A wrap-around circuit breaker (Q2S) in the SSC  
switches between the UPS module output and the bypass AC input source (when the UPS  
modules are off). Optionally, the SSC can be provided with its own maintenance bypass  
cabinet (MBC), allowing the SSC and/or any attached UPS module to be serviced while the  
load is supplied via the maintenance bypass AC input source.  
Figure EPS 6000 Major Internal Components,  
1-3  
Shared 150 - 225 kVA UPS Modules  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 6)  
FAN  
1
2
TRANSFORMER  
FB9  
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
FB1 TO FB8  
IBEZ PCA  
FB1 FB2 FB3 FB4  
FB5 FB6 FB7 FB8  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
OBEZ PCA  
RAUZ PCA  
F10,F11 RATED 2A,500VDC  
F12,F13  
INVERTER FUSES (BEHIND)  
EPOZ  
CHARGER, STATIC SW,  
BAIZ & TREZ  
INVERTERS  
(BEHIND PLATE)  
OUTPUT FUSES F7, F8, F9  
ALBZ  
120V AC OUTLET  
(FOR MGE USE ONLY)  
CARD CAGE:  
1- GTCZ PCA  
2- SRIZ PCA  
K3N  
ARUZ PCA (BEHIND MTG. PLATE)  
ACPZ PCA  
K3NZ PCA  
APOZ PCA  
1 2 3 4 5 6  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
Q1  
Q5N  
INPUT FUSES F1, F2, F3  
OUTPUT XFMR  
(BEHIND BREAKERS)  
FUSES F16, F17  
F18, F19  
OUTPUT  
CIRCUIT BREAKER  
+
A3 B3 C3  
A4 B4 C4  
NEUTRAL CONNECTION  
(BEHIND OUTPUT)  
OUTPUT  
CONNECTIONS  
INPUT  
CONNECTIONS  
GROUND  
CONNECTIONS  
BATTERY  
CONNECTIONS  
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1 — 5  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
1-4  
Shared 375 kVA UPS Modules  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 6)  
FAN  
1
2
TRANSFORMER  
FB9  
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
FB1 TO FB8  
IBEZ PCA  
FB1 FB2 FB3 FB4  
FB5 FB6 FB7 FB8  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
OBEZ PCA  
RAUZ PCA  
F10,F11 RATED 2A,500VDC  
F12,F13  
INVERTER FUSES (BEHIND)  
F23 TO F34  
3 4  
1 2  
5 6  
EPOZ  
CHARGER, STATIC SW,  
BAIZ & TREZ  
INVERTERS (x6)  
(BEHIND PLATE)  
OUTPUT FUSES F7, F8, F9  
ALBZ  
120V AC OUTLET  
(FOR MGE USE ONLY)  
CARD CAGE:  
1- GTCZ PCA  
2- SRIZ PCA  
K3N  
ARUZ PCA (BEHIND MTG. PLATE)  
ACPZ PCA  
K3NZ PCA  
APOZ PCA  
1 2 3 4 5 6  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
Q1  
Q5N  
INPUT FUSES F1, F2, F3  
OUTPUT XFMR  
(BEHIND BREAKERS)  
FUSES F16, F17  
F18, F19  
OUTPUT  
CIRCUIT BREAKER  
+
A3 B3 C3  
A4 B4 C4  
NEUTRAL CONNECTION  
(BEHIND OUTPUT)  
OUTPUT  
CONNECTIONS  
INPUT  
CONNECTIONS  
GROUND  
CONNECTIONS  
BATTERY  
CONNECTIONS  
1 — 6  
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User’s guide  
Figure EPS 6000 Major Internal Components,  
1-5  
Shared 500 kVA UPS I/O Cabinet  
NEUTRAL CONNECTION  
GROUND CONNECTION  
TOP VIEW, COVERS REMOVED  
NEUTRAL  
FRONT VIEW, DOORS AND COVERS REMOVED  
CONNECTION  
INPUT  
CONNECTIONS  
BATTERY  
CONNECTIONS  
OUTPUT  
CONNECTIONS  
BONDING  
GROUND  
JUMPER  
A3 B3 C3  
A4 B4 C4  
CONNECTION  
SHUNT  
L2  
Q1  
Q5N  
CURRENT XFMRS  
A12B12 C12  
INPUT FUSES  
F1,F2,F3  
A1 B1 C1  
N12  
ACPZ  
FUSES F16,F17  
A2  
C2  
ARUZ  
L4  
B2  
L3  
AC CAPACITORS  
Introduction  
1 — 7  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
1-6  
Shared 500 kVA UPS Cabinet  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FAN  
TRANSFORMER  
FANS  
(x 8)  
1
2
7
8
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
IBEZ  
FB1 TO FB8  
EPOZ  
OBEZ  
RAUZ  
1 2  
3 4  
5 6  
CHARGER & TREZ  
(BEHIND PLATE)  
DC CAPACITERS  
(BEHIND EACH INVERTER)  
INVERTERS (x6)  
APOZ  
AC OUTPUT  
CAPACITORS  
CARD CAGE:  
ALBZ  
1- GTCZ PCA  
2- SRIZ PCA  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
K3NZ  
F10,F11,F18,F19  
1
2
3
4
5
6
F12,F13  
DELAY  
BATTERY  
K3N  
CONNECTION  
(OPTIONAL)  
STATIC SWITCH  
NEUTRAL  
OUTPUT FUSES  
F7, F8, F9  
AC CAP ASSY.  
K1  
1 — 8  
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User’s guide  
Figure EPS 6000 Major Internal Components,  
Shared 750 kVA UPS Cabinet 1  
1-7  
Neutral  
Connection  
Ground  
Connection  
Choke  
Resistors  
Capacitors  
( - )  
( + )  
Bonding  
jumper  
Top view  
Ground  
Connection  
Input  
Output  
Connections  
Connections  
Battery  
Connections  
A3 B3 C3  
A4 B4 C4  
Relay  
Fuses  
(+)  
(-)  
Shunt  
Q5N  
(optional)  
Q1  
CT (4ea)  
Input fuses  
F1, F2, F3  
ARUZ  
ACPZ  
Induction Filter  
(2 ea) one on  
other side  
Power  
Interconnect  
CT (6ea)  
AC capacitors  
(2ea) one on  
other side  
Input Filter  
Capacitors  
BAIZ  
Induction filter  
(2ea) one on  
other side  
Cooling fans  
Static Switch  
(2ea)  
Front view, doors, cover and some components removed for clarity.  
Side View  
Introduction  
1 — 9  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
1-8  
Shared 750 kVA UPS Cabinet 2  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 8)  
FAN  
1
2
TRANSFORMER  
FB9  
7
8
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
FB1 TO FB8  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
FB1 FB2  
FB4  
FB3  
FB7  
FB5 FB6  
FB8  
INVERTER FUSES (BEHIND)  
F24,F26,F28,F30,F32,F34  
3 4  
1 2  
5 6  
INVERTERS (x6)  
ALBZ  
K3N  
F10,F11  
K3NZ  
AC OUTPUT  
CAPACITORS  
STATIC SWITCH  
NEUTRAL  
OUTPUT FUSES  
1 — 10  
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Figure EPS 6000 Major Internal Components,  
1-9  
Shared 750 kVA UPS Cabinet 3  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 8)  
FAN  
1
2
TRANSFORMER  
FB9  
TOP VIEW, COVER REMOVED  
FB1 TO FB8  
FRONT VIEW, DOORS AND COVERS REMOVED  
IBEZ PCA  
FB1 FB2  
FB4  
FB3  
FB7  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
OBEZ PCA  
RAUZ PCA  
FB5 FB6  
FB8  
INVERTER FUSES (BEHIND)  
F24,F26,F28,F30,F32,F34  
3 4  
EPOZ  
1 2  
5 6  
INVERTERS (x6)  
CARD CAGE:  
DOUZ  
ALBZ  
1- GTCZ PCA  
2- SRIZ PCA  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
F10,F11  
ACOZ  
1 2 3 4 5 6  
POWER  
INTERCONNECT  
AC OUTPUT  
CAPACITOR ASSY  
OUTPUT FUSES  
Introduction  
1 — 11  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
1-10  
Static Switch Cabinet (SSC)  
BYPASS  
BYPASS  
1 — 12  
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User’s guide  
1.4  
Options  
This section describes options available for the EPS 6000  
UPS. Some configurations do not support some options.  
Most options must be specified at the time of equipment order; some options can be installed  
in the field. Contact your MGE dealer for complete information.  
Additional battery cabinets  
Up to a maximum of four battery cabinets can be supplied for a single EPS 6000 UPS  
module, making additional back-up time available during power outages.  
Input filter  
An input harmonic current filter is available for the EPS 6000 UPS. For some power levels,  
the input filter is installed within the UPS enclosure. For others, the input filter is installed  
in an auxiliary cabinet.  
High interrupting capacity circuit breakers  
The EPS 6000 UPS module is normally equipped with circuit breakers rated at 30 kAIC.  
As an option, these breakers can be provided with a rating of 65 kAIC.  
Maintenance bypass  
For the UPS modules, maintenance bypass is provided by the SSC, allowing any or all  
attached UPS modules to be taken off-line while the SSC supports the attached load from  
its bypass source. As an option, the SSC can be equipped with its own maintenance  
bypass, allowing the SSC as well as any/all attached UPS modules to be serviced while  
the load is supported by the maintenance bypass AC input source.  
Active RS-232/RS-485  
A communications port is available that allows the UPS module or the SSC to be  
monitored from a remote terminal or computer. For detailed information on the communi-  
cation features, contact your MGE dealer.  
1.5  
Specifications,  
UPS Modules  
Specifications provided refer to an EPS 6000 UPS module  
and any required auxiliary cabinets.  
1.5.1 Electrical  
AC input ratings  
Voltage:  
208 or 480 VAC, +10%, -15%  
60 Hz, ± 10%  
3 Ø (phase sequence must be A, B, C)  
3 or 4 wires plus ground  
Frequency:  
Phases:  
Wires:  
Current:  
rating in kVA  
Amperes @ 480 VAC  
150  
225  
300  
375  
500  
750  
200  
300  
400  
490  
702  
980  
Power factor:  
Up to 0.9 lagging; 0.95 with optional input harmonic filter  
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EPS 6000 UPS Shared Systems  
AC output ratings  
Voltage:  
480 VAC ± 0.5% (steady-state conditions)  
480 VAC ± 5% (transient conditions  
from 0% to 100% or 100% to 0%)  
60 Hz ± 0.1% (free-running)  
3 Ø (phase sequence must be A, B, C)  
4 wires plus ground  
Frequency:  
Phases:  
Wires:  
Current:  
rating in kVA  
150  
225  
300  
375  
500  
750  
Amperes @ 480 VAC  
180  
271  
361  
451  
601  
902  
Power factor:  
Total harmonic distortion  
(THD):  
0.8 lagging  
< 2% (linear load)  
< 4% (for 100% non-linear load  
with a crest factor of up to 3.5)  
± 0.5% for balanced load  
Dynamic regulation:  
± 2.5% for 100% unbalanced load  
± 5% for 100% step load change  
125% of rated load for 10 minutes  
150% of rated load for 1 minute  
Dynamic response:  
Overload:  
DC ratings  
Battery voltage:  
545 Vdc float  
480 Vdc nominal  
390 Vdc minimum  
rating in kVA  
150  
225  
300  
375  
500  
750  
Maximum battery current  
at cut-off voltage (ADC)  
323  
485  
647  
809  
1,074  
1,620  
1.5.2 Mechanical  
Height:  
Depth:  
Width:  
Weight:  
Finish:  
1,905 mm (75”)  
815 mm (32”)  
See Table 1-1  
See Table 1-1  
MGE light gray  
1 — 14  
Introduction  
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1.5.3 Environmental  
Recommended environment: 20° to 25° C (68° to 77° F.); 50% relative humidity;  
computer room or other temperature- and humidity-  
controlled environment  
Operating temperature:  
Storage:  
Humidity:  
0° to 40° C (32° to 104° F.) except battery  
-20° to 50° C (-4° to 122° F.)  
up to 90% non-condensing (operating)  
sea level to 1,000 meters (sea level to 3,280 feet)  
without derating; 1,000 to 2,000 meters (3,280  
to 6,560 feet): derate operating temperature to a  
maximum of 28° C (82° F)  
Altitude:  
Acoustic noise:  
rating in kVA  
150  
225  
300  
375  
500  
750  
Accoustic noise at rated  
load in dBA at 5 feet  
from the front of  
the UPS module  
72  
72  
72  
72  
75  
78  
1.6  
Specifications,  
Static Switch  
Cabinet  
1.6.1 Electrical  
AC input ratings  
Voltage:  
480 VAC, ± 15%  
60 Hz, ± 10%  
3 Ø (phase sequence must be A, B, C)  
3 or 4 wires plus ground  
2,000 Amperes  
Frequency:  
Phases:  
Wires:  
Current:  
AC output ratings  
Voltage:  
480 VAC  
60 Hz  
3 Ø  
4 wires plus ground  
2,000 Amperes  
0.8 lagging  
Frequency:  
Phases:  
Wires:  
Current:  
Power factor:  
Introduction  
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EPS 6000 UPS Shared Systems  
1.6.2 Mechanical  
Height:  
Depth:  
Width:  
Weight:  
1,981 mm/78 in.  
1,219 mm/48 in.  
1,829 mm/72 in.  
1,310 kg/2,900 lbs. (SSC)  
1,091 kg/2,000 lbs. (MBC)  
MGE light gray  
Finish:  
1 — 16  
Introduction  
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Operation  
2.0  
2.1  
Scope  
This section presents operating information for EPS 6000  
UPS shared systems, including an overview of the system,  
its components, and their function; a description of the indicators and controls and their  
function; and operational sequences to be followed for all conditions of normal, emergency,  
and maintenance operation.  
System Operation  
Overview  
This section presents an overview of system operation.  
2.1.1 Static Switch  
Cabinet Operation  
During normal operation (as shown in Figure 2-1),  
and on-battery operation (shown in Figure 2-2), the  
attached load is supplied by the UPS modules through  
the SSC. The SSC maintains synchronization of  
the UPS modules, and monitors their proper performance.  
If all UPS modules have stopped, for instance during an overload condition or maintenance,  
the attached load is supplied by the SSC’s bypass input source.  
If the SSC is equipped with the maintenance bypass option, the load may still be supplied with  
power while the SSC is serviced, via the maintenance bypass AC input source.  
Figure Power Flow, Normal Operation  
Q2S  
2-1  
Bypass AC input  
(mains 2)  
Static switch  
TO  
Rectifier/battery  
charger  
ATTACHED  
LOAD  
Inverter  
Static switch  
cabinet (SSC)  
Main AC input  
(mains 1)  
Battery  
UPS module  
Rectifier/battery  
charger  
Inverter  
Battery  
UPS module  
Additional  
modules  
Additional  
modules  
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EPS 6000 UPS Shared Systems  
2.1.2 Normal Operation  
During normal operation (as shown in Figure 2-1), power  
flows from the main AC input source (mains 1) into the UPS  
rectifier/battery charger sections. The rectifier/battery chargers convert the AC voltage to DC,  
maintain the charge on the batteries, and feed the DC power to the inverters. The inverters  
regenerate AC voltage, and supply the SSC’s UPS module AC output bus. The SSC supplies  
the attached load.  
2.1.3  
On-Battery Operation If the main AC input source (mains 1) fails or goes out of  
tolerance, the chargers stop. Power flows from the batteries  
to the UPS inverters, which in turn supply the attached load (as shown in Figure 2-2). When  
the main AC input source (mains 1) returns, the chargers restart automatically and the UPS  
system resumes its normal operation (as shown in Figure 2-1).  
If the batteries become depleted before the main AC input source (mains 1) returns, the  
inverters stop and the attached load is transferred to the bypass AC input source (mains 2) if it  
is available (as shown in Figure 2-3).  
Figure Power Flow, On-Battery Operation  
Q2S  
2-2  
Bypass AC input  
(mains 2)  
Static switch  
TO  
Rectifier/battery  
charger  
ATTACHED  
LOAD  
Inverter  
Static switch  
cabinet (SSC)  
Main AC input  
(mains 1)  
Battery  
UPS module  
Rectifier/battery  
charger  
Inverter  
Battery  
UPS module  
Additional  
modules  
Additional  
modules  
2 — 2  
Operation  
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Figure Power Flow, Bypass Operation  
Q2S  
2-3  
Bypass AC input  
(mains 2)  
Static switch  
TO  
Rectifier/battery  
charger  
ATTACHED  
LOAD  
Inverter  
Static switch  
cabinet (SSC)  
Main AC input  
(mains 1)  
Battery  
UPS module  
Rectifier/battery  
charger  
Inverter  
Battery  
UPS module  
Additional  
modules  
Additional  
modules  
2.2  
Indicators and  
Controls  
Indicators and controls are located in three places on the  
UPS module: on the front panel, behind a drop-down cover  
just below the front panel, and inside the enclosure doors,  
as shown in Figure 2-4. In battery cabinets and auxiliary  
cabinets, the controls are located behind the cabinet doors.  
2.2.1 Front Panel  
The front panel, shown in Figure 2-5, includes the  
emergency power off (EPO) pushbutton, the audible alarm,  
four LEDs that serve as system status indicators (three on the SSC), and the “inverter on” and  
“inverter off” pushbuttons (on UPS modules only).  
Operation  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Controls and Indicators  
2-4  
Front  
panel  
Circuit breakers  
and switches  
behind  
cabinet  
door  
Alphanumeric  
display  
Hidden  
panel  
Cover  
Figure EPS 6000 Front Panel  
2-5  
Note: The SSC does not include inverter on or inverter off pushbuttons #6 and #7,  
or the battery operation LED #4.  
2 — 4  
Operation  
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Emergency power off (EPO)  
CAUTION  
Pressing the EPO disconnects the attached load.  
The emergency power off (EPO) is to be used  
during emergency situations only, where a hazard  
to personnel or equipment exists, such as during a  
fire. DO NOT USE THE EPO TO TURN THE UPS ON  
OR OFF; follow the procedures listed in this  
section for turning on and off the inverter.  
On the left side of the front panel, an emergency power off (EPO) pushbutton is  
provided, with a protective cover to guard against inadvertent operation. This  
pushbutton, when activated on a UPS module, disconnects the main AC input  
(mains 1), and battery power to the module, and disconnects output power to the  
SSC’s UPS module AC input bus. When activated on the SSC, it sends a shunt  
trip signal to the upstream protective device (Q4S) supplying the bypass AC input  
(mains 2) source, and sends an EPO command to each UPS module (see above),  
disconnecting the attached load.  
Audible alarm (Figure 2-5, item 1)  
The audible alarm provides an audible warning to the operator by sounding a  
pulsed “beep” when any of the following conditions occur:  
•
•
•
Load transferred to bypass (mains 2)  
Load supplied via battery  
Operating problem  
During minor alarm conditions, the alarm sounds at a slow rate and a low sound  
level. When the battery approaches the low-voltage shutdown level, the alarm  
sounds louder and at an increased rate. If the inverter shuts down, the alarm  
sounds loudly and continuously.  
An audible alarm reset is located on the hidden panel (see Figure 2-7). Pressing it  
will silence the alarm. Should a higher-level alarm condition occur after the reset  
has been activated, the audible alarm will sound the new alarm condition.  
¡
Load not protected LED (2)  
This red LED turns on when any of these conditions occur:  
•
•
The load is no longer protected following an inverter shutdown, or the  
opening of the isolation circuit breaker (Q5N)  
The battery circuit breaker QF1 is open, making battery power unavailable  
Operation  
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EPS 6000 UPS Shared Systems  
⁄
Operating problem LED (3)  
This orange LED turns on when an operating problem exists, such as fan failure;  
static switch power supply fault; battery temperature fault; overload fault; or bypass  
AC input (mains 2) out of tolerance. The UPS continues to protect the attached  
load.  
ı
Í
Battery operation LED (4) (UPS modules only)  
This orange LED turns on to indicate that the attached load is being partially or  
completely supplied by the battery. When the main AC input (mains 1) fails or is  
outside tolerance, stored battery energy is supplied to the inverter, which in turn  
supplies the load.  
Load protected LED (5)  
This green LED indicates that the attached load is supplied by the inverter  
and protected by the battery. During normal operation, this LED is  
the only one that is on.  
Inverter on (6) (UPS modules only)  
This green pushbutton is used to start the inverter. When it is pushed, the green  
“load protected” LED flashes for three seconds, indicating that the start command  
has been received. When the transfer conditions are satisfied  
(see Section 2.4.2, Start-up, and Section 2.4.6, Forced Transfers),  
the load is transferred to the inverter output.  
Inverter off (7) (UPS modules only)  
This gray pushbutton is used to stop the inverter. When it is pressed for 3  
seconds, the inverter stops and the UPS module is shut down; if all UPS modules  
are stopped, the load is transferred to the bypass AC input (mains 2) power  
source. If the uninterrupted transfer conditions are not met, this pushbutton has no  
effect and the inverter can be stopped only from the hidden panel (see Section  
2.4.6, Forced Transfers). See Section 2.4.2 for details of the shutdown sequence.  
2.2.2 Alphanumeric  
The alphanumeric display is located on the hidden panel,  
directly below the front panel, behind the hinged cover, as  
shown in Figure 2-4. For complete instructions, refer to  
Section 2.3, Using the Alphanumeric Display. A brief  
description of the display and controls follows:  
Display and  
Controls  
Two-line alphanumeric display (Figure 2-6)  
This 40-character, two line LCD displays general status of the UPS continuously,  
and displays measurements of UPS operating parameters as selected with  
the control pushbuttons.  
2 — 6  
Operation  
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User’s guide  
Pushbuttons  
Following are brief descriptions of the function of the alphanumeric display  
pushbuttons.  
Figure Alphanumeric Display and Controls  
LCD  
display  
Settings  
pushbutton  
˘
2-6  
pushbutton  
1 2 3 4 5 6 7 8  
LOAD IS PROTECTED  
UPS IS ON LINE  
+ –  
!
V
A
W.Hz  
*
ø
˘
Settings pushbutton  
This pushbutton is used to select the display language and adjust the LCD screen  
contrast for optimal viewing.  
Pushbutton  
This pushbutton primarily allows the selection of which UPS module or SSC the  
display communicates with; it may also serve to indicate selection, negative  
response, and other functions, depending on the displayed message.  
◊
Pushbutton  
This pushbutton provides access to voltage measurements, including:  
•
•
•
•
Main AC input (mains 1) phase-to-phase voltage  
Bypass AC input (mains 2) phase-to-neutral and phase-to-phase voltage  
Inverter output phase-to-neutral and phase-to-phase voltage  
Load phase-to-neutral and phase-to-phase voltage  
Å
Pushbutton  
This pushbutton provides access to current measurements, including:  
•
•
Main AC input (mains 1) current  
Bypass AC input (mains 2) current  
Operation  
2 — 7  
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EPS 6000 UPS Shared Systems  
•
•
•
•
Inverter current  
Load current  
Percent current drawn by the load relative to UPS module or SSC rating  
Crest factor per phase  
„
Pushbutton  
This pushbutton provides access to power and  
frequency measurements, including:  
•
•
•
•
•
Main AC input (mains 1) frequency  
Bypass AC input (mains 2) frequency  
Inverter frequency  
Power drawn by the load (in kW and kVA)  
Load power factor  
ı
Battery pushbutton  
This pushbutton provides access to battery measurements, including:  
•
•
•
•
•
Battery voltage  
Battery current  
Battery ambient temperature  
Battery time available  
Battery time remaining  
⁄
Alarms pushbutton  
This pushbutton is used to display current alarms, or to display stored alarms.  
If the alarm key is pressed repeatedly, the display will scroll through the stored  
alarm record, returning to the latest after the oldest is shown.  
If a blinking character (!) appears in the display, the user may press the Alarm  
pushbutton again to scroll through additional useful information.  
Ø
pushbutton  
This pushbutton is reserved for future use.  
°
Pushbutton  
Depending on the displayed message, this pushbutton may serve to indicate confir-  
mation, positive response, and other functions.  
2 — 8  
Operation  
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User’s guide  
Numbered lights  
The green light indicates the UPS module or SSC with which the display is  
currently communicating.  
A red light indicates that the corresponding UPS module or SSC has  
an anomaly or is not communicating with the display.  
Light #1 refers to the SSC; the UPS modules are numbered sequentially  
starting at #2.  
2.2.3 Hidden Panel  
The hidden panel is located directly below the front panel,  
behind the hinged cover, as shown in Figure 2-4. The  
hidden panel includes the following controls and indicators, as shown in Figure 2-7:  
Figure Hidden Panel  
2-7  
A B C D E F G H  
I
J
K
4
L M N  
5
fault  
1
2
3
Alphabetical lights  
Fourteen alphabetically labeled LEDs provide detailed information on  
UPS status as follows:  
A: Emergency shutdown  
This red LED indicates that the emergency power off (EPO) or remote emergency  
power off (REPO) has been activated (see Section 2.4.4.1, Emergency power off).  
Operation  
2 — 9  
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EPS 6000 UPS Shared Systems  
B: Rectifier/charger on  
This green LED indicates that the rectifier/battery charger is on.  
C: Rectifier/charger fault  
This red LED indicates an alarm condition within the rectifier/battery charger. it  
indicates the presence of one of the following fault conditions:  
•
•
•
•
•
•
•
Input circuit breaker Q1 open  
Input power protection fuse blown  
Rectifier/battery charger over-temperature  
Battery charge overcurrent  
Battery overvoltage  
Rectifier/battery charger control board fault  
Power supply board fault  
D: Main AC input (mains 1) outside tolerance  
This orange LED indicates that the main AC input (mains 1) source is outside  
tolerance (voltage and/or frequency too high or too low).  
E: Reserved for future use.  
F: Battery temperature outside tolerance  
This orange LED indicates that the ambient temperature of the battery is  
too high or too low.  
G: Battery charging  
This orange LED indicates that the battery is being recharged. This LED functions  
only when the connected battery is of the vented lead-acid type (sealed lead-acid  
batteries will not activate this signal).  
H: Inverter fault  
This red LED indicates an alarm condition in the inverter, which may be one or  
more of the following conditions:  
•
•
•
•
•
•
•
•
•
Inverter shutdown due to output voltage out of tolerance  
Inverter output protection fuse blown  
Inverter leg fault  
Inverter output transformer over-temperature  
Inverter leg over-temperature  
Current sharing fault  
Internal clock fault  
Inverter control board fault  
Power supply board fault  
I: Battery discharged  
This orange LED indicates that the battery has reached the end of its autonomy,  
shutting down the inverter.  
2 — 10  
Operation  
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User’s guide  
J: Inverter desynchronized  
This orange LED indicates that the inverter output frequency is not synchronized  
with the bypass AC input (mains 2).  
K: Transfer fault  
This red LED indicates a transfer fault, which may be one or  
more of the following conditions:  
•
•
•
•
•
Inverter output contactor K3N fault  
Current sharing relay fault  
Static switch power supply fault  
Transfer control board fault  
Power supply board fault  
L: Overload  
This orange LED indicates an alarm condition resulting from one  
or more of the following conditions:  
•
•
•
•
UPS module inverter current above rating  
UPS module output current above rating  
SSC output current above rating  
UPS module and/or SSC shutdown due to excessive load current  
M: Bypass AC input (mains 2) outside tolerance  
This orange LED indicates that the bypass AC input (mains 2) voltage and/or  
frequency are too high or too low.  
N: Maintenance position  
This orange LED indicates that circuit breakers QF1, Q4S, Q5N, or Q3BP  
are set to the maintenance position. The UPS module or SSC is  
not available for load protection.  
Test connector (Figure 2-8)  
This 9-pin connector is reserved for service. It is used to connect  
the cabinet to a computer, allowing system calibration, personalization,  
and computer-aided diagnostics.  
Pushbuttons  
Following are brief descriptions of the function of the hidden panel pushbuttons,  
shown in Figure 2-8.  
Clear fault log  
Pressing this pushbutton clears the alarms stored in memory, allowing the unit to  
restart. Memorized alarms cannot be cleared until the condition causing the alarm  
has been corrected.  
Audible alarm reset  
Pressing this pushbutton stops the audible alarm. Should a new fault condition at  
a higher alarm level occur, the alarm will sound again.  
Operation  
2 — 11  
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EPS 6000 UPS Shared Systems  
Figure Hidden Panel Pushbuttons  
Clear  
Battery  
charge cycle  
Inverter  
desync/sync  
pushbutton  
2-8  
fault log  
pushbutton pushbutton  
Forced inverter to  
bypass pushbutton  
Security (key)  
pushbutton  
A B C D E F G H I J K L M N  
fault  
1
2
3
4
5
Return to  
float voltage  
pushbutton  
Forced bypass  
to inverter  
pushbutton  
Test  
connector  
Audible  
alarm  
reset  
Battery charge cycle (pushbutton #1) (applies to UPS module only)  
Pressing this pushbutton begins a battery charging cycle. After the cycle is  
complete, the rectifier/battery charger returns to float charge levels on the battery.  
The battery charge cycle is not applicable to sealed lead-acid battery installations.  
Return to float voltage (pushbutton #2) (applies to UPS module only)  
This pushbutton can be used during a battery charge cycle to force the  
rectifier/battery charger back to the float voltage level.  
Security pushbutton (key)  
This pushbutton must be pressed simultaneously with any of the following  
three pushbuttons. This helps guard against inadvertent transfer  
of the load with interruption.  
Inverter desync/sync (pushbutton #3) (applies to SSC only)  
Pressing and holding the “security key” while pressing this pushbutton  
forces the inverter output to desynchronize or synchronize to the  
bypass AC input (mains 2) source.  
CAUTION  
Using the forced transfer functions will cause the  
load to experience an interruption for a minimum of  
0.8 seconds. Be certain the the load can tolerate  
this interruption; see Section 2.4.6, Forced  
Transfers.  
2 — 12  
Operation  
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User’s guide  
Forced bypass to inverter (pushbutton #4) (applies to SSC only)  
Pressing and holding the “security key” while pressing this pushbutton forces the  
transfer of the load to the inverter output when the bypass is out of tolerance.  
Enough UPS modules must have been started; press the “inverter on” pushbutton  
on their front panels if necessary. The load will experience a 0.8 second inter-  
ruption. Refer to Section 2.4.2, Start-up, and Section 2.4.6, Forced Transfers.  
Forced inverter to bypass (pushbutton #5) (applies to UPS module only)  
Pressing and holding the “security key” while pressing this pushbutton stops the  
inverter and disconnects the module from the load, even if the bypass is out of  
tolerance; if all UPS modules are stopped, the load will be transferred to  
bypass with a 0.8 second interruption. Refer to Section 2.4.6, Forced Transfers.  
CAUTION  
Using the forced transfer functions will cause the  
load to experience an interruption for a minimum of  
0.8 seconds. Be certain the the load can tolerate  
this interruption; see Section 2.4.6, Forced  
Transfers.  
2.2.4 Circuit Breakers,  
EPS 6000 circuit breakers and switches (except the  
battery disconnect circuit breaker QF1) are located behind  
the doors of the UPS cabinet, or through the door in the  
optional MBC. Following is a brief description of the  
available circuit breakers, contactors and switches, and  
their function. The single-line diagram in Figure 2-9  
Contactors and  
Switches  
shows the location of each circuit breaker, contactor and switch within the electrical path,  
and Figure 2-10 thorugh Figure 2-17 show the location of each switch, contactor and circuit  
breaker within the enclosures.  
Upstream of the SSC:  
Q4S  
Customer-supplied upstream circuit breaker, used to isolate the SSC from the bypass AC  
input (mains 2) source and provide backfeed protection.  
In the SSC (and optional MBC):  
Q2S  
Wrap-around circuit breaker (automatic), used to supply the attached load via the bypass  
AC input (mains 2) source.  
Q3BP  
Q5N  
(Optional), system maintenance bypass circuit breaker, used to supply the attached load  
via the maintenance bypass source while the SSC is being serviced.  
(Optional), system isolation circuit breaker, used to isolate the shared system from the  
Operation  
2 — 13  
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EPS 6000 UPS Shared Systems  
attached load.  
Figure Single-Line Diagram,  
2-9  
Typical EPS 6000 UPS Shared Installation  
MAINTENANCE  
BYPASS  
AC INPUT  
STATIC SWITCH  
CABINET  
MAINTENANCE  
BYPASS CABINET  
(OPTIONAL)  
STATIC SWITCH  
Q38P  
Q4S  
(CUSTOMER  
SUPPLIED)  
Q2S  
Q5N  
TO  
BYPASS  
AC INPUT/  
MAINS 2  
ATTACHED  
LOAD  
EPS 6000 UPS MODULE  
STATIC SWITCH  
INVERTER  
FROM ADDITIONAL  
UPS MODULES  
Q1  
Q5N  
K3N  
MAIN  
AC INPUT/  
MAINS 1  
INPUT  
FUSES  
OUTPUT  
FUSES  
RECTIFIER/  
CHARGER  
EPS 6000  
BATTERY  
QF1  
EPS 6000 UPS MODULE  
STATIC SWITCH  
INVERTER  
Q1  
Q5N  
K3N  
INPUT  
FUSES  
OUTPUT  
FUSES  
RECTIFIER/  
CHARGER  
EPS 6000  
BATTERY  
QF1  
2 — 14  
Operation  
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User’s guide  
Figure EPS 6000 Major Internal Components,  
2-10  
Shared 150 - 225 kVA UPS Module  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 6)  
FAN  
1
2
TRANSFORMER  
FB9  
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
FB1 TO FB8  
IBEZ PCA  
FB1 FB2 FB3 FB4  
FB5 FB6 FB7 FB8  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
OBEZ PCA  
RAUZ PCA  
F10,F11 RATED 2A,500VDC  
F12,F13  
INVERTER FUSES (BEHIND)  
EPOZ  
CHARGER, STATIC SW,  
BAIZ & TREZ  
INVERTERS  
(BEHIND PLATE)  
OUTPUT FUSES F7, F8, F9  
ALBZ  
120V AC OUTLET  
(FOR MGE USE ONLY)  
CARD CAGE:  
1- GTCZ PCA  
2- SRIZ PCA  
K3N  
ARUZ PCA (BEHIND MTG. PLATE)  
ACPZ PCA  
K3NZ PCA  
APOZ PCA  
1 2 3 4 5 6  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
Q1  
Q5N  
INPUT FUSES F1, F2, F3  
OUTPUT XFMR  
(BEHIND BREAKERS)  
FUSES F16, F17  
F18, F19  
OUTPUT  
CIRCUIT BREAKER  
+
A3 B3 C3  
A4 B4 C4  
NEUTRAL CONNECTION  
(BEHIND OUTPUT)  
OUTPUT  
CONNECTIONS  
INPUT  
CONNECTIONS  
GROUND  
CONNECTIONS  
BATTERY  
CONNECTIONS  
Operation  
2 — 15  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
2-11  
Shared 300 / 375 kVA UPS Module  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 6)  
FAN  
1
2
TRANSFORMER  
FB9  
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
FB1 TO FB8  
IBEZ PCA  
FB1 FB2 FB3 FB4  
FB5 FB6 FB7 FB8  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
OBEZ PCA  
RAUZ PCA  
F10,F11 RATED 2A,500VDC  
F12,F13  
INVERTER FUSES (BEHIND)  
F23 TO F34  
3 4  
1 2  
5 6  
EPOZ  
CHARGER, STATIC SW,  
BAIZ & TREZ  
INVERTERS (x6)  
(BEHIND PLATE)  
OUTPUT FUSES F7, F8, F9  
ALBZ  
120V AC OUTLET  
(FOR MGE USE ONLY)  
CARD CAGE:  
1- GTCZ PCA  
2- SRIZ PCA  
K3N  
ARUZ PCA (BEHIND MTG. PLATE)  
ACPZ PCA  
K3NZ PCA  
APOZ PCA  
1 2 3 4 5 6  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
Q1  
Q5N  
INPUT FUSES F1, F2, F3  
OUTPUT XFMR  
(BEHIND BREAKERS)  
FUSES F16, F17  
F18, F19  
OUTPUT  
CIRCUIT BREAKER  
+
A3 B3 C3  
A4 B4 C4  
NEUTRAL CONNECTION  
(BEHIND OUTPUT)  
OUTPUT  
CONNECTIONS  
INPUT  
CONNECTIONS  
GROUND  
CONNECTIONS  
BATTERY  
CONNECTIONS  
2 — 16  
Operation  
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User’s guide  
Figure EPS 6000 Major Internal Components,  
2-12  
Shared 500 kVA UPS Module I/O Cabinet  
NEUTRAL CONNECTION  
GROUND CONNECTION  
TOP VIEW, COVERS REMOVED  
NEUTRAL  
FRONT VIEW, DOORS AND COVERS REMOVED  
CONNECTION  
INPUT  
CONNECTIONS  
BATTERY  
CONNECTIONS  
OUTPUT  
CONNECTIONS  
BONDING  
GROUND  
JUMPER  
A3 B3 C3  
A4 B4 C4  
CONNECTION  
SHUNT  
L2  
Q1  
Q5N  
CURRENT XFMRS  
A12B12 C12  
INPUT FUSES  
F1,F2,F3  
A1 B1 C1  
N12  
ACPZ  
FUSES F16,F17  
A2  
C2  
ARUZ  
L4  
B2  
L3  
AC CAPACITORS  
Operation  
2 — 17  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
2-13  
Shared 500 kVA UPS Module UPS Cabinet  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FAN  
TRANSFORMER  
FANS  
(x 8)  
1
2
7
8
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
IBEZ  
FB1 TO FB8  
EPOZ  
OBEZ  
RAUZ  
1 2  
3 4  
5 6  
CHARGER & TREZ  
(BEHIND PLATE)  
DC CAPACITERS  
(BEHIND EACH INVERTER)  
INVERTERS (x6)  
APOZ  
AC OUTPUT  
CAPACITORS  
CARD CAGE:  
ALBZ  
1- GTCZ PCA  
2- SRIZ PCA  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
K3NZ  
F10,F11,F18,F19  
1
2
3
4
5
6
F12,F13  
DELAY  
BATTERY  
K3N  
CONNECTION  
(OPTIONAL)  
STATIC SWITCH  
NEUTRAL  
OUTPUT FUSES  
F7, F8, F9  
AC CAP ASSY.  
K1  
2 — 18  
Operation  
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User’s guide  
Figure EPS 6000 Major Internal Components,  
Shared 750 kVA UPS Module UPS Cabinet 1  
2-14  
Neutral  
Connection  
Ground  
Connection  
Choke  
Resistors  
Capacitors  
( - )  
( + )  
Bonding  
jumper  
Top view  
Ground  
Connection  
Input  
Output  
Connections  
Connections  
Battery  
Connections  
A3 B3 C3  
A4 B4 C4  
Relay  
Fuses  
(+)  
(-)  
Shunt  
Q5N  
(optional)  
Q1  
CT (4ea)  
Input fuses  
F1, F2, F3  
ARUZ  
ACPZ  
Induction Filter  
(2 ea) one on  
other side  
Power  
Interconnect  
CT (6ea)  
AC capacitors  
(2ea) one on  
other side  
Input Filter  
Capacitors  
BAIZ  
Induction filter  
(2ea) one on  
other side  
Cooling fans  
(2ea)  
Static Switch  
Front view, doors, cover and some components removed for clarity.  
Side View  
Operation  
2 — 19  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
2-15  
Shared 750 kVA UPS Module UPS Cabinet 2  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 8)  
FAN  
1
2
TRANSFORMER  
FB9  
7
8
TOP VIEW, COVER REMOVED  
FB1 TO FB8  
FRONT VIEW, DOORS AND COVERS REMOVED  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
FB1 FB2  
FB4  
FB3  
FB7  
FB5 FB6  
FB8  
INVERTER FUSES (BEHIND)  
F24,F26,F28,F30,F32,F34  
3 4  
1 2  
5 6  
INVERTERS (x6)  
ALBZ  
K3N  
F10,F11  
K3NZ  
AC OUTPUT  
CAPACITORS  
STATIC SWITCH  
NEUTRAL  
OUTPUT FUSES  
2 — 20  
Operation  
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User’s guide  
Figure EPS 6000 Major Internal Components,  
2-16  
Shared 750 kVA UPS Module UPS Cabinet 3  
AC CAPACITOR  
ASSEMBLY  
3
4
5
6
FANS  
(x 8)  
FAN  
1
2
TRANSFORMER  
FB9  
TOP VIEW, COVER REMOVED  
FRONT VIEW, DOORS AND COVERS REMOVED  
FB1 TO FB8  
IBEZ PCA  
FB1 FB2  
FB4  
FB3  
FB7  
DC CAPACITORS  
(BEHIND EACH INVERTER)  
OBEZ PCA  
RAUZ PCA  
FB5 FB6  
FB8  
INVERTER FUSES (BEHIND)  
F24,F26,F28,F30,F32,F34  
3 4  
EPOZ  
1 2  
5 6  
INVERTERS (x6)  
CARD CAGE:  
DOUZ  
ALBZ  
1- GTCZ PCA  
2- SRIZ PCA  
3- CRIZ PCA  
4- CROZ / DO6Z PCA  
5- AROZ PCA  
6- ALEZ PCA  
F10,F11  
ACOZ  
1 2 3 4 5 6  
POWER  
INTERCONNECT  
AC OUTPUT  
CAPACITOR ASSY  
OUTPUT FUSES  
Operation  
2 — 21  
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EPS 6000 UPS Shared Systems  
Figure EPS 6000 Major Internal Components,  
2-17  
Static Switch Cabinet (SSC)  
STATIC SWITCH CABINET  
(WITH FRONT DOORS REMOVED)  
MAINTENANCE BYPASS CABINET  
(WITH FRONT DOOR REMOVED)  
TRANSFORMER (T12)  
CIRCUIT BREAKER  
(Q2S)  
PCA (CBOZ)  
FUSES  
(F1, F2, F3, & F4)  
UPS  
UPS  
ROTARY SWITCHES  
(SW1, & SW2)  
TRANSFORMER (T13)  
FAR SIDE OF PANEL  
PCA (EPOZ)  
CIRCUIT BREAKER  
(Q3BP)  
PCA (ACOZ)  
PCA (RAUZ)  
PCA (ACPZ)  
PCA (OBEZ)  
CAPACITORS  
(C11, C12, & C13)  
FAR SIDE OF PANEL  
PCA (IBEZ)  
CIRCUIT BREAKER  
(Q5N)  
PCA (PROZ)  
CARD CAGE  
STATIC SWITCH PCA  
(SSSZ)  
STATIC SWITCH  
PCA (GTCZ)  
PCA (ALEZ)  
PCA (AROZ)  
PCA (SRIZ)  
FUSES (F11, F12, & F13)  
FAR SIDE OF PANEL  
In the UPS modules:  
Q1  
Input isolation circuit breaker, used to isolate the UPS module from the main  
AC input (mains 1) source and provide input current protection.  
Q5N  
K3N  
UPS isolation circuit breaker, used to isolate the UPS module from he attached load.  
Inverter output contactor (automatic), used to isolate the inverter when it is off.  
In the circuit of the battery of each UPS module:  
QF1  
Battery disconnect circuit breaker, used to disconnect the battery from the UPS. QF1  
provides isolation and protection between the UPS module and its battery system.  
2 — 22  
Operation  
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User’s guide  
2.3  
Using the  
Alphanumeric  
Display  
This section describes operation and use of the alphanu-  
meric display in detail.  
The alphanumeric display interacts with the user via the top  
half of the hidden panel (Figure 2-4). Figure 2-18 shows  
the general organization of the alphanumeric display.  
During normal operation, when there are no alarm conditions present and the load is supplied  
by the UPS inverter output, the display will present the general status message:  
LOAD IS PROTECTED  
UPS IS ON LINE  
When there are alarm conditions, the display will present a general alarm message, and the  
user can use the “alarm” pushbutton (!) to determine the exact cause of the alarm condition  
(see Section 2.3.2, Alarms).  
The following sections present detailed operating instructions for the alphanumeric display.  
Figure Alphanumeric Display  
LCD  
display  
Settings  
pushbutton  
˘
2-18  
pushbutton  
1
2
3
4
5
!
6
7
8
LOAD IS PROTECTED  
UPS IS ON LINE  
+ –  
V
A
W.Hz  
*
Operation  
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Figure General Display Configuration  
General status screen.  
This is the default display. It automatically reappears  
if the control panel has not been used for ten minutes.  
2-19  
!
Alarm display  
V
Voltage measurements  
A
Current measurements  
W.Hz  
Frequency and power measurements  
+ –  
Battery measurements  
Reserved for future use (on/off controls)  
to  
confirm  
*
Language and screen contrast settings  
to  
set  
to  
confirm  
≥ °  
2.3.1 Settings  
The settings selection screens allow the user to  
configure the display language and set the contrast  
of the LCD display.  
To access the settings selection screen, press the settings pushbutton, and follow the steps as  
indicated in Figure 2-20.  
Figure Display Settings Display  
Press the settings pushbutton to access the  
language selection menu.  
ø
2-20  
Select the display language: French, English  
(U.K.), Spanish, Dutch, Italian, Swedish,  
Portugese, or English U.S.  
LANGUAGE = ENGLISH U.S.  
≥=SELECT  
*=CONFIRM.  
Press the pushbutton to confirm the language  
°
selection and access the contrast selection menu.  
°
Set the display contrast by pressing the ≥  
pushbutton until the desired contrast is reached.  
Press the pushbutton to confirm the contrast  
selection and return to the general status screen.  
°
DISPLAY CONTRAST  
≥=SELECT *=CONFIRM.  
°
general status screen  
2 — 24  
Operation  
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User’s guide  
IMPORTANT  
Select ENGLISH U.S. as the display language to  
match the displays as presented in this manual.  
2.3.2 Alarms  
In the event of an alarm condition, the general status  
screen shows an alarm message. To determine the specific  
condition causing the alarm, press the alarm key on the front panel, as shown in Figure 2-21.  
If there is a flashing exclamation mark (!) in the displayed message, there is additional  
information to be viewed. Follow the steps as indicated in Figure 2-21.  
Most alarm messages are self-explanatory; see Section 2.5 for a listing of the  
most common alarm messages.  
The most serious alarms are stored in the fault log, and may be viewed by following  
the steps shown in Figure 2-21. To reset the alarms, press the “clear fault log”  
pushbutton (see Section 2.2.3).  
Figure Displaying Alarm Messages  
This message on the general status screen  
indicates an alarm condition. The flashing  
exclamation mark (!) indicates that there are  
alarm messages to view. To view them, press the  
"alarm" pushbutton.  
ALARM  
2-21  
. . .  
!
!
(ALARM MESSAGE NUMBER 1)  
The last alarm message is not followed by an  
exclamation mark (!). When the "alarm"  
pushbutton is pressed again, the display will  
return to the general status screen.  
(LAST ALARM MESSAGE)  
general status screen  
Operation  
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2.3.3 Measurements  
The LCD can display comprehensive information about  
UPS performance through its monitoring functions.  
2.3.3.1 Voltage  
To display voltage measurements, press the “V” key on the  
keyboard, as shown in Figure 2-22.  
Measurements  
Figure Voltage Measurements  
Select voltage measurements by  
pressing the ◊pushbutton  
2-22  
◊
INPUT  
V RMS  
VAB  
VBC  
VBN  
VBC  
VBN  
VBC  
VBN  
VBC  
VCA  
VCN  
VCA  
VCN  
VCA  
VCN  
VCA  
Main input (mains 1) phase-to-phase voltages  
in VAC RMS.  
(Only in UPS modules)  
(only in SSC)  
◊
Bypass input (mains 2) phase-to-neutral  
voltages in VAC RMS.  
BYPASS  
V RMS  
VAN  
◊
Bypass input (mains 2) phase-to- phase  
voltages in VAC RMS.  
BYPASS  
V RMS  
VAB  
(only in SSC)  
◊
Inverter output phase-to-neutral voltages in  
VAC RMS.  
INV.  
V RMS  
VAN  
(only in UPS modules)  
◊
Inverter output phase-to-phase voltages in  
VAC RMS.  
INV.  
V RMS  
VAB  
(only in UPS modules)  
◊
Load phase-to-neutral voltages in VAC RMS.  
Load phase-to-phase voltages in VAC RMS.  
LOAD  
V RMS  
VAN  
◊
LOAD  
VAB  
V RMS  
◊
2 — 26  
Operation  
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User’s guide  
To display current measurements, press the “A” key on the  
keyboard, as shown in Figure 2-23.  
Figure Current Measurements  
Select current measurements by  
pressing the Åpushbutton  
2-23  
Å
Å
Å
Å
Å
INPUT  
A RMS  
I1  
I1  
I1  
I1  
I2  
I2  
I2  
I2  
I3  
I3  
I3  
I3  
(Only in UPS modules)  
(only in SSC)  
Main input (mains 1) currents in AAC RMS.  
Bypass input (mains 2) currents in AAC RMS.  
BYPASS  
A RMS  
INV.  
A RMS  
(only in UPS modules)  
Inverter output currents in AAC RMS.  
Load currents in AAC RMS.  
LOAD  
A RMS  
I LOAD / IN  
Highest current drawn by a load phase, relative to  
the current rating of the UPS module or SSC (IN).  
=
%
(IN =  
A)  
Å
LOAD  
CREST F.  
I1  
I2  
I3  
Load crest factor for each phase.  
Å
Operation  
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2.3.3.3 Power and  
Frequency  
To display power or frequency measurements, press the  
“W.Hz” key on the keyboard, as shown in Figure 2-24.  
Measurements  
Figure Power and Frequency Measurements  
Select power and frequency measurements  
2-24  
by pressing the „pushbutton.  
„
Frequency in Hertz for the main input (mains 1),  
bypass input (mains 2), and inverter output.  
FREQ.  
HZ  
INP. BYP. INV.  
„
LOAD  
KW  
P1  
P2  
P3  
Real power drawn by the load in kilowatts, for  
each phase.  
„
Percentage of real power drawn by the load,  
relative to the rated output of the UPS module or  
SSC.  
P LOAD / Pn  
(PN=  
KW)  
=
%
„
Apparent power in kVA drawn by the load for  
each phase.  
LOAD  
KVA  
P1  
P2  
P3  
„
Total real power (in kW) and apparent power (in  
kVA) drawn by the load.  
P. TOTAL  
LOAD  
P.KW  
P.KVA  
„
Load power factor (real power divided by  
apparent power)  
POWER FACTOR  
LOAD P.F.  
=
„
2 — 28  
Operation  
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User’s guide  
To display battery voltage, current, ambient temperature,  
and time available or remaining, press the battery key on  
the keyboard, as shown in Figure 2-25.  
Figure Battery Measurements  
Select battery measurements by  
pressing the "battery" pushbutton.  
2-25  
ı
UBAT.  
V
°
IBAT.  
A
T BAT.  
Baattery voltage (VDC), charge (+) or discharge  
(–) current (ADC), and battery temperature  
(degrees Celsius).  
*
C
OR  
ı
If the main input (main 1) source is available, this  
indicates the amount of battery time (in minutes)  
available in the event of a main input outage.  
AVAILABLE BAT.TIME  
MN %KV  
LOAD =  
ı
If the main input (mains 1) source is out of  
tolerance or is unavailable, this indicates the  
amount of battery time (in minutes) remaining for  
on-battery operation.  
REMAINING BAT. TIME  
MN %KV LOAD =  
ı
2.4  
Normal Operating  
Procedures  
This section presents normal operating procedures for the  
EPS 6000 UPS.  
It is best to contact MGE Customer Support Services  
for start-up and maintenance of the EPS 6000 UPS. Do not allow unqualified personnel  
to operate the EPS 6000.  
2.4.1 Checks Before  
Before starting the EPS 6000 UPS, make certain that these  
conditions exist (as applicable to your installation):  
Start-up  
•
•
All power and control wires have been properly connected and securely tightened.  
The upstream and downstream protective devices are not tripped, and have been  
sized properly for the UPS and load requirements.  
•
•
The voltage at each main AC input circuit breaker Q1 and at the bypass input  
circuit breaker Q4S is the same as indicated on the UPS nameplate, located inside  
the right door of the EPS 6000 UPS module.  
The air filters located inside each EPS 6000 UPS module front door are properly  
installed and free of dust, dirt, and debris. Make certain that no objects block the  
air intake at the front bottom of the enclosures, and that the air exhaust at the top  
rear of the enclosures is free of obstructions.  
Operation  
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In the individual UPS modules:  
•
Input (isolation) circuit breaker Q1 is in the OFF (open) position.  
•
Battery disconnect circuit breaker QF1 is in the OFF (open) position.  
Output isolation circuit breaker Q5N is in the OFF (open) position.  
•
In the SSC:  
•
•
System maintenance bypass circuit breaker Q3BP is in the OFF (open) position (if  
present).  
System output isolation circuit breaker Q5N is in the OFF (open) position (if  
present).  
•
•
Input power supply switches SW1 and SW2 are in the ON (closed) position.  
The upstream bypass AC input (mains 2) circuit breaker (Q4S, customer-supplied)  
is in the OFF (open) position.  
•
If present, the upstream maintenance bypass circuit breaker (customer-supplied) is  
in the OFF (open) position.  
2.4.2 Start-up  
The following start-up procedure should be performed  
during the initial start-up following installation of the system,  
and this sequence should be followed any time that the EPS 6000 UPS system is being  
restarted from an off condition (i.e., after the UPS has been powered down by removing the  
upstream AC input power and opening all the circuit breakers of the UPS system).  
a. Apply power to Q4S by closing the upstream circuit breaker supplying Q4S,  
and the upstream circuit breaker supplying the optional  
maintenance bypass input (if present).  
b. Apply power to the UPS modules by closing the upstream circuit breaker supplying  
the main AC input (mains 1).  
c. Start the SSC:  
1. Close the optional system maintenance bypass circuit breaker Q3BP (if  
present, in the maintenance bypass cabinet). Power is now available at the  
SSC output (the load is energized) via the maintenance bypass source.  
2. Close the upstream circuit breaker Q4S that supplies the bypass input to  
the SSC. The SSC will come on-line; after about ten (10) seconds, the  
wrap-around circuit breaker Q2S will automatically close.  
3. Close the optional system isolation circuit breaker Q5N (if present, in the  
maintenance bypass cabinet).  
4. Open the optional system maintenance bypass circuit breaker Q3BP  
(if present). The SSC is now on-line and the load is supplied  
via the bypass source.  
Note that if your SSC configuration does not include the maintenance bypass option,  
start-up requires only closing Q4S to supply the bypass source to the SSC.  
All other functions are fully automatic.  
2 — 30  
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d. Start the UPS modules:  
1. For each module, close the input isolation circuit breaker Q1. Verify that  
the following conditions exist:  
•
•
The red “load not protected” LED is on  
The rectifier/battery charger automatically starts  
If either condition is not present, there is a fault. Open Q1 and  
contact MGE Customer Support Services.  
2. For each module, close the UPS isolation circuit breaker Q5N. The fans in  
the UPS module will start.  
3. For each module, close the battery disconnect circuit breaker QF1.  
The batteries are now connected to the rectifier/battery charger, and  
have begun charging.  
IMPORTANT  
Because it is standard for the UPS module to be  
programmed for automatic restart, the inverter will  
automatically start after the battery disconnect  
circuit breaker QF1 has been closed.  
4. If the modules are not programmed for automatic restart, for each module,  
press the “inverter on” pushbutton. The green “load protected” LED will  
flash for about 3 seconds, indicating that the inverter is starting.  
5. As soon as a sufficient number of UPS modules have been started, the  
SSC will automatically transfer the load to the UPS module output. On  
each module, the green “load protected” LED will turn on and remain on.  
On the SSC, the green “load protected” LED will turn on.  
NOTE  
If the transfer conditions are not satisfied (bypass  
AC input sources is out of tolerance, or some other  
reason), a forced transfer is required. Refer to  
Section 2.4.6, Forced Transfers.  
6. As the remaining UPS modules are turned on (per step 4 above), their  
respective green “load protected” LEDs flash for three seconds, then  
remain on as the modules connect to the load. The load is equally shared  
between modules.  
2.4.3 Checks After  
Start-up  
After initial start-up of the system, normal operation should  
be tested. At the minimum, the following tests should be  
performed (as applicable to your installation):  
•
Emergency power off (EPO) test from each UPS module, and from the SSC.  
Operation  
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•
•
•
•
Remote emergency power off (REPO) test (if applicable).  
Inverter start and stop (for each module).  
Battery transfer test.  
Maintenance bypass procedure.  
2.4.4 Shut-down  
This section presents procedures for shutting down the  
system under normal, emergency, overload, and  
maintenance conditions.  
2.4.4.1 Emergency  
Shutdown  
Using EPO  
CAUTION  
Pressing the EPO disconnects the attached load.  
The emergency power off (EPO) is to be used  
during emergency situations only, where a hazard  
to personnel or equipment exists, such as during a  
fire. DO NOT USE THE EPO TO TURN THE UPS ON  
OR OFF; follow the procedures listed in this  
section for turning the inverter on and off.  
During an emergency situation, such as a fire in the computer or electrical room, the UPS  
and all downstream devices can be instantly shut down by pressing the “emergency power off”  
(EPO) pushbutton on the front panel of the SSC, or by pressing the “remote emergency  
power off” (REPO) optional pushbutton located within the room.  
The EPO or REPO pushbuttons should not be used for normal shutdown of the equipment;  
when activated, ground paths may be broken (depending on installation) and sensitive loads  
attached to the UPS may lose safety ground connection.  
Each UPS module has an EPO feature that can be activated to shut down  
that module only (see Section 2.2.1).  
2 — 32  
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User’s guide  
To shut down an individual UPS module, press the “inverter  
off” pushbutton on the module front panel for 3 seconds. To  
restart, press the “inverter on” pushbutton. Note that the transfer will occur only if the inverter is  
synchronized to the bypass; otherwise, a forced transfer is needed (see Section 2.4.6).  
IMPORTANT  
When one UPS module in a shared system is shut  
down, it may cause the remaining modules to enter  
an overload or current-limiting condition, if they  
are unable to fully support the attached load. The  
remaining modules may shut down after a certain  
time or immediately (depending on the load level),  
and the load may be transferred to the bypass AC  
input source.  
2.4.5 Isolation for  
Maintenance  
2.4.5.1 Isolation of  
an Individual  
To isolate an individual UPS module for maintenance  
(allowing the remaining UPS modules to maintain the  
attached load), follow this procedure (starting with all UPS  
modules operating normally, supplying the attached load):  
UPS Module  
1. Stop the inverter by pressing the “inverter off” pushbutton on the UPS module front  
panel for 3 seconds. The audible alarm will sound; silence the alarm by pressing  
the audible alarm reset pushbutton on the hidden panel (see Section 2.2.3). If the  
transfer conditions are not satisfied (bypass out of tolerance or other reason), a  
forced transfer is required; refer to Section 2.4.6, Forced Transfers.  
Operation  
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IMPORTANT  
When one UPS module in a shared system is shut  
down, it may cause the remaining modules to enter  
an overload or current-limiting condition, if they  
are unable to fully support the attached load. The  
remaining modules may shut down after a certain  
time or immediately (depending on the load level),  
and the load may be transferred to the bypass AC  
input source.  
2. Open the UPS isolation circuit breaker Q5N.  
3. Open the battery disconnect circuit breaker(s) QF1.  
4. Open the input isolation circuit breaker Q1.  
The UPS module is now isolated for maintenance. For complete protection, the upstream  
circuit breaker supplying the UPS module should be opened, locked, and tagged while the  
UPS is being serviced.  
To restart the UPS module after maintenance:  
1. Close the input isolation circuit breaker Q1.  
2. Close the isolation circuit breaker Q5N. The UPS module fans will start.  
3. Wait for the green LED “B” on the hidden panel to turn on (indicating that the  
rectifier/battery charger has started), then close the battery disconnect circuit  
breaker QF1. If there is more than one battery cabinet in your configuration, close  
all the battery disconnect circuit breakers.  
IMPORTANT  
Because it is standard for the UPS module to be  
programmed for automatic restart, the inverter will  
automatically start after the battery disconnect  
circuit breaker QF1 has been closed.  
4. If the module is not programmed for automatic restart, start the inverter by  
pressing the “inverter on” pushbutton on the UPS front panel. In a few moments,  
the inverter will start and the UPS module will resume normal operation.  
If the transfer conditions are not satisfied (bypass out of tolerance or other reason),  
a forced transfer will be required. Refer to Section 2.4.2, Start-up, and  
Section 2.4.6, Forced Transfers.  
2 — 34  
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2.4.5.2 Isolation of  
Static Switch  
To isolate the SSC for maintenance, or to transfer the load  
to maintenance bypass input source (if present), follow the  
procedure that applies to your configuration.  
Cabinet (SSC)  
2.4.5.2.1 Without  
Maintenance  
Bypass  
This procedure assumes that the UPS system is  
operating normally, with the attached load supplied  
via the UPS modules.  
1. Isolate all the UPS modules by following the procedure in Section 2.4.5.1.  
2. Open the upstream bypass circuit breaker Q4S.  
CAUTION  
Opening Q4S with the UPS modules off in a UPS  
system with no maintenance bypass will disconnect  
the attached load.  
The whole UPS system is now isolated for maintenance. For complete protection, Q4S or the  
upstream circuit breaker supplying Q4S should be locked open and tagged while the UPS  
system is being serviced.  
To restart the UPS system after maintenance:  
1. Close the upstream bypass circuit breaker Q4S. After about 10 seconds, the  
wrap-around circuit breaker Q2S will close and supply the attached load  
via the bypass source.  
2. Restart the UPS modules by following the procedure in Section 2.4.5.1.  
2.4.5.2.2 With Maintenance  
Bypass  
This procedure assumes that the UPS system is  
operating normally, with the attached load supplied  
via the UPS modules:  
1. Isolate all the UPS modules by following the procedure in Section 2.4.5.1.  
2. Close the system maintenance bypass circuit breaker Q3BP.  
3. Open the system isolation circuit breaker Q5N. The SSC is now isolated from  
the load, which is supplied by the maintenance bypass AC input source.  
4. Open the upstream bypass circuit breaker Q4S.  
Operation  
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The whole UPS system is now isolated for maintenance. For complete protection,  
Q4S or the upstream circuit breaker supplying Q4S should be locked open and  
tagged while the UPS is being serviced.  
To restart the UPS system after maintenance:  
1. Close the upstream bypass circuit breaker Q4S. After about 10 seconds, the wrap-  
around circuit breaker Q2S will close.  
2. Close the system isolation circuit breaker Q5N.  
3. Open the system maintenance bypass circuit breaker Q3BP. The SSC is now on  
line and the load is supplied via the bypass source.  
4. Restart the UPS modules by following the procedure in Section 2.4.5.1.  
2.4.6 Forced Transfers  
This section describes the normal transfer conditions  
and the procedures to be followed when  
issuing forced transfers.  
CAUTION  
Using the forced transfer functions will cause the  
load to experience an interruption for a minimum of  
0.8 seconds. Be certain the the load can tolerate  
this interruption.  
2.4.6.1 Uninterrupted  
Transfer Conditions  
To transfer the load between the UPS module output and  
the bypass AC input (mains 2) source without interruption,  
the following conditions must be satisfied:  
•
•
•
UPS module output and bypass AC input phases must be in sync  
Bypass AC input voltage must be within 10% of nominal  
Bypass AC input frequency must be within a certain  
programmable tolerance of nominal  
Provided that both the UPS module output and bypass AC input sources meet these  
conditions, uninterrupted transfers can take place. If these conditions are not met, transfers  
cannot take place without interruption. A forced transfer is required.  
Forced transfers require a power interruption to the load of 0.8 seconds. Before issuing a  
forced transfer command, be certain that the attached load can tolerate the brief outage.  
The following paragraphs describe the forced transfer procedures.  
2 — 36  
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2.4.6.2 Forced Transfer  
From Bypass  
This procedure assumes that the load is being supplied by  
the bypass AC input (mains 2) source via the SSC.  
Start the UPS modules (refer to Section 2.4.2, steps d1 to d4).  
On the SSC hidden panel, press the “security” key (Figure  
2-8, “key” pushbutton) and hold it while pressing the “forced  
bypass to inverter” key (pushbutton #4). If enough modules  
are on, the load will be disconnected for 0.8 seconds, then  
connected to the UPS modules.  
AC Input Source  
to Inverter  
2.4.6.3 Forced UPS Module  
On the UPS hidden panel, press the “security” key (Figure  
2-8, “key” pushbutton) and hold it while pressing the “forced  
inverter to bypass” key (pushbutton #5). This stops the  
inverter and disconnects the UPS module. When all  
Shut Down  
modules are stopped, the load will be disconnected for 0.8 seconds, then connected to the  
bypass AC input source.  
IMPORTANT  
When one UPS module in a shared system is shut  
down, it may cause the remaining modules to enter  
an overload or current-limiting condition, if they  
are unable to fully support the attached load. The  
remaining modules may shut down after a certain  
time or immediately (depending on the load level),  
and the load may be transferred to the bypass AC  
input source.  
2.5  
LCD Messages  
This section presents the most common alarm messages  
that appear on the LCD (the alphanumeric section of the  
“hidden” panel), and explains their meaning.  
LOAD IS PROTECTED  
UPS IS ON LINE  
This is the normal display message. There are no alarms or problems, and the load  
is being supplied by the UPS inverter.  
Operation  
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General alarms  
LOW LEVEL ALARM  
UPS OK !  
This message indicates that a problem requiring action has occurred. The load is still supplied  
by the inverter. The problem is listed in the secondary alarm message (see below), as  
indicated by the flashing exclamation mark (!). The alarm message may be viewed by  
pressing the “alarm” pushbutton (!).  
UPS INPUT FAILURE  
LOAD ON BATTERY !  
This message indicates that the main AC input (mains 1) has failed or is outside of tolerance,  
and power to the inverter is being supplied from the UPS battery system. The load is  
still supplied via the inverter.  
REMAINING BAT. TIME  
__ MN %KW LOAD = __  
This message is automatically displayed every five seconds when the UPS is on battery. It  
alternates with the previous message. The message provides an estimate of the available  
remaining time on battery, based on the percentage of full rated load being supplied, the type  
of battery, the battery temperature, and the battery age.  
UPS LOW BATTERY  
SHUTDOWN IMMINENT !  
This message indicates that the battery has reached the “low battery shutdown” warning level.  
The user must take steps to prepare the load for shutdown (load shedding, file saving and  
computer shutdown, etc.). This message replaces the previous two messages when the  
battery is nearly depleted. When this message appears, there are only a few minutes of  
battery back-up time remaining.  
UPS ALARM  
CALL SERVICE !  
This indicates that the battery disconnect circuit breaker QF1 has been opened or the inverter  
has stopped and that service is required. The problem is listed in the secondary alarm  
message (see below), as indicated by the flashing exclamation mark (!). The secondary alarm  
message may be viewed by pressing the “alarm” pushbutton (!).  
Secondary alarms  
The presence of these alarms is indicated by a flashing exclamation mark (!) on the general  
alarm message. Press the “alarm” pushbutton to view these messages.  
EMERGENCY SHUTDOWN  
REPO ON !  
This message indicates that the UPS has been shut down because a remote emergency  
power off (REPO) pushbutton has been pressed.  
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LOAD ON  
BYPASS !  
This message indicates that the load has been transferred to the bypass AC input (mains 2)  
source. The load is no longer protected.  
BYPASS PROBLEM  
CHECK FREQUENCY !  
This message indicates that the bypass AC input (mains 2) source is out of frequency  
tolerance. The inverter has switched to free-running mode. Transfer of the load from the  
inverter output to the bypass AC input source requires an interruption of power to the load.  
BYPASS PROBLEM  
CHECK VOLTAGE !  
This message indicates that the bypass AC input (mains 2) source is out of voltage tolerance.  
The inverter has switched to free-running mode. Transfer of the load from the inverter output  
to the bypass AC input source requires an interruption of power to the load.  
INDEPENDENT INVERTER  
FREQ. COMMAND ON !  
This message indicates that the inverter has been set to free-running mode. The inverter is  
not synchronized to the bypass AC input (mains 2) power source. Transfer of the load from the  
inverter output to the bypass AC input source requires an interruption of power to the load.  
BYPASS TRANSFER  
LOCKOUT COMMAND ON !  
This message indicates that the UPS has been set not to transfer from the inverter  
to the bypass AC input (mains 2) source. In the event of an inverter shutdown,  
the load will be disconnected.  
BATTERY CABINET  
OVERTEMP. !  
This message indicates that the ambient temperature of the battery is out of tolerance.  
UPS INPUT PROBLEM  
CHECK FREQUENCY !  
This message indicates that the main AC input (mains 1) frequency is out of tolerance. The  
rectifier/battery charger has shut down and the inverter is operating from its battery source.  
UPS INPUT PROBLEM  
CHECK VOLTAGE !  
This message indicates that the main AC input (mains 1) voltage is out of tolerance. The  
rectifier/battery charger has shut down and the inverter is operating from its battery source.  
Operation  
2 — 39  
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CHARGER SHUTDOWN  
COMMAND ON !  
This message indicates that the rectifier/battery charger has been instructed to shut down,  
for example during progressive (stepped) transfer to a motor-generator set.  
INPUT KVA LIMITED  
COMMAND ON !  
This message indicates that the rectifier/battery charger has been instructed to limit the power  
drawn from the main AC input (mains 1) source. This condition occurs, for example, when the  
load is being supplied by an undersized motor-generator set; the UPS battery source is called  
upon to make up the difference.  
BATTERY CURRENT  
LIMIT COMMAND ON !  
This message indicates that the rectifier/battery charger has been instructed to limit the  
charge current to the battery. Normal charge current to the battery will be supplied when the  
command is released. This condition occurs, for example, when the load is being supplied by  
an undersized motor-generator set.  
QF1 BATTERY BREAKER  
OPEN !  
This message indicates that the battery circuit breaker QF1 has been opened or has tripped.  
The load is no longer protected, since battery power is unavailable.  
LOW BATTERY  
. . . !  
This message indicates that the UPS module has shut down, due to depletion  
of the battery’s stored energy.  
CHARGER OFF  
. . . !  
This message indicates that the rectifier/battery charger has shut down.  
CHARGER FAULT  
CALL SERVICE !  
This message indicates that a fault has occurred in the rectifier/battery charger,  
and that service is required.  
Q1 UPS INPUT CB  
OPEN !  
This message indicates that the input isolation circuit breaker is open or has tripped. It must  
be closed for rectifier/battery charger start-up.  
2 — 40  
Operation  
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User’s guide  
INVERTER OVERLOAD  
CHECK P.F. AND KW  
This message indicates that the inverter is in an overload condition, usually due to excessive  
real power (kW) being drawn by the load. The flashing “KW” indicates that the operator should  
check the load real power. The inverter will keep supplying the load for a certain amount of  
time depending on the overload level.  
INVERTER FAULT  
CALL SERVICE !  
This message indicates that a fault has occurred in the inverter, and that service is required.  
INVERTER SHUTDOWN  
OVERLOAD > I MAX!  
This message indicates that an overload greater than 1.5 times the power rating of the inverter  
has occurred, and that the inverter has shut down.  
INVERTER SHUTDOWN  
THERMAL OVERLOAD A  
This message indicates that an overload below 1.5 times the power rating of the inverter has  
occurred and that the inverter has shut down. The flashing “A” indicates that the operator  
should check the load current.  
I LOAD > IN  
CHECK LOAD A  
This message indicates that the load power being drawn is greater than the full load rating.  
The flashing “A” indicates that the operator should check the load current. The UPS module or  
SSC will keep supplying the load for a certain amount of time depending on the overload level.  
TRANSFER FAULT  
CALL SERVICE !  
This message indicates that a fault has occurred that affects the transfer of the load between  
the inverter and the bypass source. Service is required.  
PH OUT OF TOLERANCE !  
This message indicates that there is an out of tolerance condition between the inverter and  
bypass AC input (mains 2) sources. Transfer of the load between the inverter and bypass AC  
input will result in an interruption of load power.  
Q4S BYPASS SWITCH  
OPEN !  
This message indicates that the upstream circuit breaker Q4S is open. Transfer of the load  
from the inverter to the bypass source is not possible.  
Operation  
2 — 41  
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Q5N UPS OUTPUT ISOL.  
SWITCH OPEN !  
On a UPS module, this message indicates that the UPS module isolation circuit breaker Q5N  
is open, making it impossible for that module to supply the load. On the SSC, this message  
signals that the system isolation circuit breaker Q5N in the MBC is open, and the load is not  
supplied unless the maintenance bypass circuit breaker Q3BP is closed.  
Q3BP MAINT. BYPASS  
SWITCH CLOSED !  
This message indicates that the optional maintenance bypass circuit breaker Q3BP in the  
MBC is closed. The system is set to maintenance bypass, and the load is supplied by the  
maintenance bypass AC input source.  
STATIC SWITCH O.L.  
EMERGENCY OFF !  
This message indicates that the SSC’s static switch and wrap-around circuit breaker Q2S have  
opened following an overload condition, disconnecting the load.  
BATTERY CHARGING !  
This message indicates that the battery is being recharged.  
INDEPENDENT INVERTER  
FREQUENCY !  
This message indicates that the inverter is operating in free-running mode, and is no longer  
synchronous with the bypass AC input source (mains 2). Inverter frequency is stable within  
0.1 Hz, but transfer of the load to the bypass AC input source is not possible without an inter-  
ruption of power to the load.  
NUMBER OF MODULES  
READY INSUFFICIENT !  
This message indicates that the load cannot be transferred from the bypass input source to  
the UPS modules because not enough UPS modules have been started up.  
UPS  
TRANSFER LOCKOUT !  
This message indicates that the load cannot be transferred from the inverter to the bypass AC  
input (mains 2) source without interruption because the conditions for transfer without interrup-  
tion are not met (see Section 2.4.6.1), or because the inverter is operating in free-running  
mode or in current limit, or because the UPS has been commanded not to transfer without  
interruption, or because of an internal fault.  
2 — 42  
Operation  
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FAN FAILURE  
CALL SERVICE !  
This message indicates that a fan has failed, and that service is required. Because the  
fans of the rectifier/battery charger and the inverter are redundant, the load is still  
supplied by the inverter.  
AUXILIARY CABINET FAULT  
CALL SERVICE !  
This message indicates that there is a fault in an auxiliary cabinet, and that service is required.  
CALL SERVICE FOR  
BATTERY PM !  
This message indicates that the battery may have reached its end of life (based on the rated  
lifetime and the conditions of use).  
MODULE NUMBER X  
UNAVAILABLE  
This message indicates that the core controller of the selected module (UPS module or SSC,  
see Section 2.2.2) is not sending data to the alphanumeric display. The status of the module  
is still correctly indicated by the LEDs of the visible panel (see Section 2.2.1) and the hidden  
panel (see Section 2.2.3).  
MODULE NUMBER X  
FAULT  
This message indicates that the core controller of the selected module (UPS module or SSC,  
see Section 2.2.2) is sending invalid data to the alphanumeric display. The status of the  
module is still correctly indicated by the LEDs of the visible panel (see Section 2.2.1) and the  
hidden panel (see Section 2.2.3).  
DISPLAY NUMBER X  
UNAVAILABLE  
This message indicates that the alphanumeric display is not operating properly. The status of  
the UPS module or SSC is still correctly indicated by the LEDs of the visible panel (see  
Section 2.2.1) and the hidden panel (see Section 2.2.3).  
Operation  
2 — 43  
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Maintenance and Service  
3.0  
3.1  
Scope  
This section describes maintenance of the EPS 6000 UPS,  
including safety instructions, preventive maintenance,  
descriptions of replacement parts kits, and service.  
Safety Instructions  
IMPORTANT SAFETY INSTRUCTIONS FOR SERVICING BATTERIES  
A. Servicing of batteries should be performed or supervised by personnel  
knowledgeable of batteries and the required precautions.  
Keep unauthorized personnel away from batteries.  
B. When replacing batteries, use the same model and manufacturer of batteries.  
C. CAUTION — Do not dispose of battery or batteries  
in a fire. The battery may explode.  
D. CAUTION — Do not open or mutilate the battery or batteries. Released electrolyte  
is harmful to the skin and eyes. It may be toxic.  
E. CAUTION — A battery can present a risk of electrical shock and  
high short-circuit current. The following precautions should  
be observed when working with batteries:  
1. Remove watches, rings, or other metal objects.  
2. Use tools with insulated handles.  
3. Wear rubber gloves and boots.  
4. Do not lay tools or metal parts on top of batteries.  
5. Disconnect charging source prior to connecting or disconnecting  
battery terminals.  
6. Determine if the battery is inadvertently grounded. If inadvertently  
grounded, remove the source of ground. Contact with any part of a  
grounded battery can result in electrical shock. The likelihood of such  
shock will be reduced if such grounds are removed during installation and  
maintenance.  
3.2  
Preventive  
The following preventive maintenance routines should be  
considered the minimum requirements; your installation and  
site may require additional preventive maintenance to  
assure optimal performance from your installed EPS 6000  
Maintenance  
UPS and associated equipment. These routines should be performed twice a year (more often  
if required). We strongly recommend contracting MGE Customer Support Services for  
preventive and remedial maintenance.  
The technician or electrician performing preventive maintenance on the UPS must be familiar  
with the indicators, controls, and operation of the UPS, as described in this manual.  
3 — 1  
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a. Isolate and de-energize all EPS 6000 UPS equipment for all  
maintenance operations.  
b. Ensure that all equipment is clean and free of loose dust, dirt, and debris. The  
exterior of all enclosures may be cleaned with a mild solution of soap and water,  
lightly applied with a lint-free cloth.  
c. Inspect the air intake and exhaust plates and clean as required. Verify that air  
flows freely through the equipment. Clean the air intake and exhaust plates, and  
the enclosure interior, with a vacuum cleaner.  
d. The EPS 6000 UPS module is equipped with air filters that should be changed at  
regular intervals. Inspect the filters regularly to determine how long the filters will  
last in your installation.  
e. Initiate the start-up procedure, as described in Section 2.4.1.  
f. Test the main operating sequences as applicable to your equipment  
configuration and installation.  
3.3  
Replacement Parts  
There are no user replaceable parts inside the EPS 6000  
UPS.  
Three levels of replacement parts are available for the EPS 6000 UPS. The three levels are  
designated A, B, and C. The level that you should keep on hand for your installation will vary  
depending on the type of maintenance planned on site, and the configuration of your UPS  
system. Having the replacement parts on hand will prevent any unacceptable delays (due to  
time involved obtaining spare parts) during critical periods, such as system start-up. Any items  
used during start-up will be replaced by MGE at no charge. Contact MGE Customer Support  
Services for specific recommendations. A description of each level is provided below:  
Level  
Description  
A
This level of replacement parts consists of consumable items, specifically fuses and air  
filters. It is recommended to have these items on hand during installation of the UPS  
systems, including initial start-up.  
B
C
This level of replacement parts is recommended when the user can tolerate short-dura-  
tion UPS down-time to obtain replacement parts in the event of a major UPS failure. This  
level of replacement parts consists of consumable items, specifically fuses, air filters, an  
inverter leg, and the most critical circuit board assemblies.  
This level of replacement parts is recommended when the user can tolerate only a mini-  
mum of down-time in the event of a major UPS failure. This level of replacement parts  
consists of consumable items, specifically fuses, air filters, an inverter leg, and a com-  
plete set of circuit board assemblies.  
3 — 2  
Maintenance and Service  
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User’s guide  
3.4  
Troubleshooting  
Should you encounter a problem in the operation of a  
UPS module and need MGE UPS Systems, Inc. to  
service your product, please take into account the  
following recommendations.  
and MGE Servicing  
To the extent that you feel comfortable with the unit, leave it in its current state, make a record  
of the display lights and alarm messages and call either your local MGE Field Engineer or  
MGE’s Customer Support Services at 1-800-438-7373 for assistance. Leaving the unit in its  
current state will enable MGE’s field engineers to troubleshoot your product and bring it back  
on line more easily.  
If you are not comfortable with the current status of the unit, you may want to take the  
following actions (listed by order of increasing impact on ease of troubleshooting):  
1. If the audible alarm is active, reset it by pressing the audible alarm reset button  
(the second button from the left on the lower hidden panel as shown in Figure 2-8).  
2. Stop the inverter (see Section 2.4.4.2 for normal shutdown and Section 2.4.6.3 for  
forced shut down).  
3. Open the isolation circuit breaker Q5N.  
4. Open the battery circuit breaker(s) QF1.  
5. Reset the alarms by pressing the fault log clear button (the left most button on the  
lower hidden panel as shown in Figure 2-8).  
6. Open the input isolation circuit breaker Q1 or the upstream circuit breaker feeding  
Q1.  
After taking these steps, make a record of the display lights and alarm messages, call your  
local MGE Field Engineer or call 1-800-438-7373 for assistance.  
Maintenance and Service  
3 — 3  
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Glossary  
Symbols  
Used to reference paragraph headings that are listed in the table of  
contents.  
/
Used to represent “and/or.”  
%
Percent; of each hundred.  
° F.  
Degrees Fahrenheit.  
° C  
Degrees Celsius.  
@
At.  
±
Plus or minus.  
#
Number.  
Ø
Phase.  
Ω
Ohms.  
2nd  
Second.  
A, B, C  
AC or ac  
Normal sequence of phases (clockwise) in three-phase power.  
Alternating current.  
Alphanumeric  
display  
The LCD display above the hidden panel (behind the drop-down cover) on  
the UPS module and the SSC.  
Ambient  
air temperature The temperature of the surrounding air.  
Ambient noise  
Attached load  
The noise level of the environment.  
The load attached to the UPS output, such as a computer system or  
manufacturing system.  
Audible alarm  
AWG  
A buzzer, located behind the front panel on the UPS module and the SSC,  
that sounds when alarm conditions occur.  
American Wire Gauge, formerly Brown & Sharp gauge.  
g — 1  
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B or BAT.  
or BATT.  
Battery.  
Breaker  
Circuit breaker.  
British Thermal  
Unit  
A unit of heat equal to 252 calories (see BTU).  
BTU or Btu  
British thermal unit. Defined as the amount of energy required to raise the  
temperature of 1 pound of water by 1° F.  
BYP  
Bypass.  
BYPASS  
Maintenance bypass; wrap-around manual maintenance bypass using the  
optional bypass circuit breaker Q3BP in conjunction with circuit breaker  
Q4S and isolation circuit breaker Q5N.  
Bypass  
AC input  
Mains 2.  
Calorie  
Carrier  
A unit of heat. One calorie is the amount of energy required to raise the  
temperature of one gram of water by one degree Celsius.  
The company or individual responsible for delivering goods from one area  
to another.  
CB  
Circuit breaker.  
Conduit  
C.S.S.  
CT  
A flexible or rigid tube surrounding electrical conductors.  
Customer Support Services.  
Current transformer.  
Curr.  
Current.  
Current rating  
The maximum current that a piece of electrical equipment is designed to  
carry.  
DC or dc  
Direct current.  
Earth ground  
Electrician  
A ground circuit that has contact with the earth.  
Refers to an installation electrician qualified to install heavy-duty electrical  
components in accordance with local codes and regulations. Not  
necessarily qualified to maintain or repair electrical or electronic equipment.  
Compare to technician.  
EPO  
Emergency power off.  
g — 2  
Glossary  
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Free running  
Indicates that the inverter frequency is stable and independent of the  
bypass AC input (mains 2) frequency.  
FREQ  
Fusible  
GND  
Hz  
Frequency.  
Capable of being melted with heat.  
Ground  
Hertz, a measure of frequency; one cycle per second equals one Hertz.  
Current.  
I
Input branch  
circuit  
The input circuit from the building power panel to the equipment.  
An electrical circuit that generates an AC sinewave output from a DC input.  
Kilovolt-Ampere; a measure of apparent power.  
Kilowatt; a measure of real power.  
Inverter  
kVA  
kW  
LCD  
Liquid-crystal display.  
LED  
Light-emitting diode.  
LEG or Leg  
Inverter leg.  
Load protected The attached load is being supplied by the UPS module inverter output,  
and the battery is available in the event that incoming (utility) power is lost.  
Load not  
protected  
The attached load is being supplied, but the battery system is unavailable.  
Low battery  
shutdown  
The battery has reached the lowest permitted operating voltage, and the  
inverter has shut down (disconnecting the load) to protect the battery from  
damage due to further discharge.  
Mains or  
mains 1  
Main AC input source.  
Bypass AC input source.  
Maximum.  
Mains 2  
MAX  
MBC  
Optional maintenance bypass cabinet that attaches to the SSC (in shared  
systems).  
Glossary  
g — 3  
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MCM  
Thousand circular mil; standard wire sizes for multiple stranded conductors  
over 4/0 AWG in diameter. M is from the Roman numeral system; it is the  
symbol for 1,000.  
MG  
Motor-generator set.  
MGE  
module  
MGE UPS Systems, Inc.  
Refers to an EPS 6000 UPS module (rectifier/battery charger, inverter, and  
attached battery cabinet).  
MOV  
Metal-oxide varistor.  
NEC  
National electrical code.  
National fire protection association.  
Part number.  
NFPA  
NO. or No.  
OSHA  
OF  
Occupational safety and health act.  
Over-frequency.  
On-battery  
operation  
The attached load is being supplied by the stored energy in the battery  
system.  
OV  
Over-voltage.  
Packing list  
P.F.  
The list of articles included in a given shipment.  
Power factor.  
Q1  
UPS input isolation circuit breaker.  
Q3BP  
Optional maintenance bypass circuit breaker (in single-module UPS  
system); optional maintenance bypass circuit breaker in MBC cabinet (in  
shared systems).  
Q4S  
Q5N  
QF1  
Control or bypass circuit breaker (in single-module UPS systems); user-  
supplied bypass AC input circuit breaker supplying the SSC (in shared  
systems).  
Optional UPS isolation circuit breaker (in single-module UPS systems);  
UPS module isolation circuit breaker (in shared systems); optional SSC  
isolation circuit breaker (in MBC).  
Battery disconnect circuit breaker.  
g — 4  
Glossary  
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Remote  
emergency  
power off  
A switch used for shutting down electrical equipment from a location away  
from the equipment.  
REPO  
SCR  
Remote emergency power off.  
Silicon-controlled rectifier.  
Security bypass  
(key)  
Pushbutton on the hidden panel (UPS modules and SSC) allowing forced  
transfers and other commands to be issued. The security key pushbutton  
must be held down while the desired function is executed.  
SEQ  
Sequence.  
Shipping  
damage  
Any damage done to an article while it is in transit.  
Shipping pallet A platform on which articles are fixed for shipping.  
Specific gravity The ratio of the weight of a given volume of substance (such as electrolyte)  
to that of an equal volume of another substance (such as water) used as a  
reference.  
SSC  
Static switch cabinet (in shared systems).  
Synchronization.  
Sync or synch  
Technician  
Refers to an electronic technician qualified to maintain and repair electronic  
equipment. Not necessarily qualified to install electrical wiring. Compare  
with electrician.  
Test connector DB-9 type connector on the hidden panel (UPS modules and SSC) allowing  
an MGE Customer Support Services technician to access programmable  
and diagnostic features of the system.  
U
Voltage.  
UF  
UL  
UPS  
UV  
VAC  
Vb  
Under frequency.  
Underwriters Laboratories, Inc.  
Uninterruptible power system.  
Under voltage.  
Volts of alternating current.  
Battery voltage (in volts DC).  
Glossary  
g — 5  
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VDC  
Via  
Volts of direct current.  
By way of.  
VPC  
Volts per cell, the measure of the electrical potential of a storage cell, such  
as a battery.  
XFMR  
Transformer.  
g — 6  
Glossary  
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