w w w. m g e u p s . c o m
Standard Features
◗ Epsilon 200A System
◗ Epsilon 400A/600A
System
Epsilon STSTM
200A and 400A/600A
Static Transfer Switch
Installation and User Manual
86-504004-00 B03
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Installation and User Manual
Epsilon STSTM
200A and 400A/600A
Static Transfer Switch
Installation and User manual
Revision History
Epsilon STS 200A and 400A/600A STS, Installation and User Manual 86-12345-00 B02
Revision:
A00
B00
B01
B02
B03
Initial Release
ECN: 002866
ECN:#003777
ECN:#004471
ECN:#004991
06/2002
09/2002
03/2004
07/2005
10/2006
Copyright © 2005 MGE UPS SYSTEMS, INC.
All rights reserved. Printed in U.S.A.
MGE UPS SYSTEMS, INC.
1660 Scenic Avenue
Costa Mesa, CA 92626
(714) 557-1636
Technical Support:
1-800-523-0142 (during business hours)
Customer Care Center:
1-800-438-7373 (Hours: 24/7)
86-504004-00 B03
Chaptername
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Epilson STS
IMPORTANT SAFETY INSTRUCTIONS
TM
SAVE THESE INSTRUCTIONS – This manual contains important instructions for the Epsilon STS that must be
followed during operation of the equipment.
WARNING
ATTENTION
WARNUNG!
Opening enclosures expose hazardous voltages. Always refer service to
qualified personnel only.
L'ouverture des cabinets expose des tensions dangereuses. Assurez-vous
toujours que le service ne soit fait que par des personnes qualifiees.
Das öffnen der Gehäuse legen gefährliche Spannungen bloss. Service
sollte immer nur von qualifizierten Personal durchgeführt werden.
WARNING
ATTENTION
WARNUNG!
As standards, specifications, and designs are subject to change, please
ask for confirmation of the information given in this publication.
Comme les normes, spécifications et produits peuvent changer, veuillez
demander confirmation des informations contenues dans cette publication.
Normen, Spezifizierungen und Pläne unterliegen Anderungen. Bitte verlan-
gen Sie eine Bestätigung über alle Informationen, die in dieser Ausgabe
gemacht wurden.
NOTE
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of
this equipment in a residential area is likely to cause harmful interference
in which case the user will be required to correct the interference at user's
own expense.
Certification Standards
◗
◗
◗
◗
◗
IEEE 587-1980/ANSI C62.41 for Cat. B3, 1980 Standards for Surge Withstand Ability
FCC rules and regulations of Part 15, Subpart J, Class A , EN50081-2 (use shielded cables)
UL listed under 1008, Standards for Transfer Switch Equipment.
NEMA PE 1 (National Electrical Manufacturers Association) - Uninterruptible Power Systems
NEMA 250 (National Electrical Manufacturers Association)
– Enclosures for Electrical Equipment (1000 Volts Maximum)
◗
◗
◗
NFPA 70 – National Electrical Code
ISO 9001 Quality Assurance, NEC, ANSI, NEMA, NFPA, IEEE.
Occupational Safety & Health Administration (OSHA)
ii
Important Safety Information and Standards
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Installation and User Manual
WARNING
To reduce the risk of fire or electric shock, install in a temperature and
humidity controlled indoor area free of conductive contaminant’s.
This equipment is intended only for installations in a RESTRICTED
ACCESS LOCATION.
ATTENTION Pour réduire le riske d'inccendie ou d'électrocution, installer dans une
enciente intérieure contrôlée en température et humidité et sans
contaminant’s conducteurs.
Ce matériel est destiné seulement pour des installations dans un
EMPLACEMENT RESTREINT d'accès.
WARNUNG! Um die Gefahr von Feuer und elektrischem Schock zu reduzieren, muss
das Gerät in einem temperatur - und feuchtigkeitskontrollierten Raum, frei
von leitungsfähigen Verunreinigungen, installiert werden. Dieses Gerät ist
nur für die Installation an einem Ort mit eingeschränkter Zugangserlaubnis
vorgesehen.
Diese Ausrüstung ist nur für Anlagen in einem EINGESCHRäNKTEN
ZUGRIFF STANDORT bestimmti.
WARNING
HIGH LEAKAGE CURRENT. Earth connection essential before
connecting supply.
ATTENTION COURANT DE FUITE ELEVE. Raccordement a la terre indispensable
avant le raccordement au reseau.
WARNUNG! Hoher Ableitstrom Vor Inbetriebnahme Schutzleiterverbindung
herstellen.
How to use this manual and Symbol Usage
This manual is designed for ease of use and easy location of information.
This manual uses four icon symbols with text to convey important information and tips.
WARNING
CAUTION
Indicates information provided to protect the user and service personnel against safety
hazards and/or possible equipment damage.
Indicates information provided to protect the user and service personnel against possible
equipment damage.
IMPORTANT
NOTE
Indicates information provided as an operating instruction, or as an operating tip.
Indicates information provided as an operating tip or an equipment feature.
86-504004-00 B03
How To Use This Manual and Symbol Usage
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Epilson STS
CAUTION: Record All Serial Numbers!
TM
RECORD ALL SERIAL NUMBERS FOR THE Epilson STS AND COMPONENTS.
THESE SERIAL NUMBERS WILL BE REQUIRED IF YOUR SYSTEM NEEDS SERVICE.
KEEP THIS MANUAL IN A PLACE WHERE YOU CAN REFERENCE THE SERIAL
NUMBERS IF SERVICE IS REQUIRED!
UPS SERIAL NUMBER: _______________________________________________________
MODULE SERIAL NUMBER: ____________________________________________________
BATTERY SERIAL NUMBER: ___________________________________________________
ADDITIONAL MODULES SERIAL NUMBERS:
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
______________________________
______________________________
______________________________
______________________________
______________________________
______________________________
______________________________
______________________________
______________________________
______________________________
iv
CAUTION: Record All Serial Numbers
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Contents
section
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . .ii
Certification Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
How to use this manual and Symbol Usage . . . . . . . . . . . . . . . . . . . .iii
CAUTION: Record All Serial Numbers! . . . . . . . . . . . . . . . . . . . . . . .iv
Quick Start
section
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
First steps by an on-site qualified Technical Engineer . . . . . . . . . . . . .QS —1
Required Equipment and Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .QS —1
Step 1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .QS —2
Step 2 Connection of Utility Power Inputs . . . . . . . . . . . . . . . . . . . . .QS —4
Connect Input Power from Two Sources
. . . . . . . . . . . . . . . .QS —4
Step 3 Connection of the Load Outputs . . . . . . . . . . . . . . . . . . . . . .QS —4
Step 4 Call MGE UPS Systems for Field Engineer Service . . . . . .QS —5
Step 5 Arrival of MGE Field Engineer . . . . . . . . . . . . . . . . . . . . . . . .QS —5
Optional Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .QS —6
Section 1 Introduction
section
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
1.0
1.1
1.2
1.3
1.4
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 1
Reference Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 1
Section Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 1
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 2
Epsilon STSTM System Characteristics . . . . . . . . . . . . . . . . . . .1 — 3
1.4.1 PMM2 Plus and PMM2 Ultra . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 4
System Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 5
Single Line Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 7
System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 8
1.7.1 Electrical Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . .1 — 8
1.7.2 Electrical Cable Access and Connections . . . . . . . . . . . . . . . . . .1 — 9
1.7.3 Connecting Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 9
1.7.4 Accessing Electrical Connections . . . . . . . . . . . . . . . . . . . . . . .1 — 10
1.5
1.6
1.7
86-504004-00 B03
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Epilson STS
Section 2 Setup and Installation
section
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
2.0
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 1
First steps by an on-site qualified Technical Engineer . . . . . . . .2 — 1
Final steps by MGE Field Service Engineer . . . . . . . . . . . . . . . .2 — 1
Required Equipment and Tools . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 1
Cabinet Placement and Environment . . . . . . . . . . . . . . . . . . . . .2 — 2
Clearances and FootPrint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 2
2.2.1 Conduit Plate Location (bottom entry) . . . . . . . . . . . . . . . . . . . . .2 — 3
Source #1 AC Input Connections . . . . . . . . . . . . . . . . . . . . . . . .2 — 3
2.3.1. Source #2 AC Input Connections . . . . . . . . . . . . . . . . . . . . . . . .2 — 3
2.3.2 AC Output Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 3
2.3.3 Remote Emergency Power Off (REPO) Cable Connections . . .2 — 4
2.3.4 Remote Source Loss Test Cable Connections . . . . . . . . . . . . . .2 — 4
2.3.5 Connection of the Relay Communication Card . . . . . . . . . . . . . .2 — 5
2.3.6 Characteristics of the Output Contacts . . . . . . . . . . . . . . . . . . . .2 — 6
2.3.7 Characteristics of the Input Contacts . . . . . . . . . . . . . . . . . . . . .2 — 6
2.3.8 Removing the Communications Card Cover . . . . . . . . . . . . . . . .2 — 7
2.3.9 Replacing the Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 7
Setting Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 8
Setting the Output Relay Contacts and Inputs Switching States 2 — 9
2.5.1 Connection of the JBUS Communication Card . . . . . . . . . . . . .2 — 10
Check Points Before and After Start Up . . . . . . . . . . . . . . . . . .2 — 10
2.6.1 Pre-Start Up Safety Check List . . . . . . . . . . . . . . . . . . . . . . . .2 — 10
2.6.2 Post-Start Up Safety Check List . . . . . . . . . . . . . . . . . . . . . . . .2 — 10
2.1
2.2
2.3
2.4
2.5
2.6
Section 3 Operation
section
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
3.0
3.1
3.2
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —1
Preparation for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —1
Pre-Start Up Safety Check List . . . . . . . . . . . . . . . . . . . . . . . . . .3 —1
3.2.1 Normal Start Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —2
3.2.2 Post Start Up Safety Check List . . . . . . . . . . . . . . . . . . . . . . . . . .3 —3
3.2.3 Shutdown Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —3
Transfer Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —4
3.3.1 Automatic Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —4
3.3.2 Manual Transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —4
3.3.3 Automatic Retransfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —4
3.3.4 Transfer Authorization/Prohibition . . . . . . . . . . . . . . . . . . . . . . . . .3 —5
Maintenance Bypass/Molded Case Switches/Live System Test .3 —5
3.4.1 Switch Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —5
3.4.2 Electrical Bypass Switch Interlock . . . . . . . . . . . . . . . . . . . . . . . .3 —5
3.4.3 Electric Input-Bypass Switch Interlock . . . . . . . . . . . . . . . . . . . . .3 —5
3.4.4 Mechanical Key Interlocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —5
3.4.5 Live System Test (Except with 4-Interlock System) . . . . . . . . . . .3 —6
3.3
3.4
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Installation and User Manual
Section 3
Operation (continued)
section
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
3.4.6 EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —6
3.5
Preferred Source Selection (Symmetrical Operation) . . . . . . . . .3 —6
Sensing and Transfer Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —6
Overload Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —6
Shorted SCR Protection (including Backfeed Protection) . . . . . .3 —6
Open SCR Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —7
Source Cross-Connection Protection . . . . . . . . . . . . . . . . . . . . . .3 —7
Bypass Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —7
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —9
Front Display Interface Panel . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —10
Operator Interface Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —14
Epsilon STS™ Customization . . . . . . . . . . . . . . . . . . . . . . . . . .3 —15
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3.15
Glossary
Reorder Form
MGE Warranty & Proprietary Rights for Three Phase Products
MGE Standard Three Phase Warranty
Proprietary Rights Statement
Warranty and Product Registration
User Information
Product information
Warranty Extension (Warranty+)
Customer Care Center - Single Phase Products
Technical Support and Product Services
Who to Contact
Scheduling Field Service Engineer Support
Return Policy for Repair of ThreePhase Products (RGA)
86-504004-00 B03
Contents
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Epilson STS
Figures
figure
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
QS-1
QS-2
QS-3
QS-4
QS-5a
QS-5b
Positioning of 200A Epsilon STS™. . . . . . . . . . . . . . . . . . . . . .QS —2
Positioning of 400/600A Epsilon STS™ . . . . . . . . . . . . . . . . . .QS —3
200A STS Input/Output Power Connections. . . . . . . . . . . . . . .QS —4
400/600A STS Input/Output Power Connections. . . . . . . . . . . .QS —5
200A STS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .QS —6
400/600A STS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .QS —6
1-1a: Epsilon STS™ - 200A Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 2
1-1b: Epsilon STS™ - 400/600A Cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 2
1-2: PMM2 and PMM2 Ultra Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 4
1-3: Operator Input Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 6
1-4: Single Line Diagram, Epsilon STSTM with Options. . . . . . . . . . . . . . . . .1 — 7
1-5: 200A STS Power and Control Wire Connections. . . . . . . . . . . . . . . . .1 — 10
1-6: 400/600 STS Power and Control Wire Connections. . . . . . . . . . . . . . .1 — 11
2-1: 200STS and 400/600A STS Cabinet Clearances. . . . . . . . . . . . . . . . . .2 — 2
2-2: 200A /400/600A STS Cabinet Footprint and Top View. . . . . . . . . . . . . .2 — 3
2-3: Control Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 4
2-4: Output Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 6
2-5: Removing the Communications Card Cover. . . . . . . . . . . . . . . . . . . . . .2 — 7
2-6: Removing the Communications Card Cover. . . . . . . . . . . . . . . . . . . . . .2 — 7
2-7: SA2 and Dip switch location on communication card. . . . . . . . . . . . . . .2 — 8
2-8: JBUS Communication Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 — 10
3-1: Front Display Interface Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —10
3-2: LCD Normal Operation Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —11
3-3: Manual Operation Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —12
3-4: LED Mimic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —13
3-5: LCD Display Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —14
3-6: Customization Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —15
Tables
table description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .page
1-1: Input/Output Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 10
1-2: Input/Output Power Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 — 11
2-1: Heat Rejection Data and Rated Current. . . . . . . . . . . . . . . . . . . . . . . . .2 — 2
2-2: Relay Contacts (communications card) . . . . . . . . . . . . . . . . . . . . . . . . .2 — 5
3-1: Customization Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 —15
c iv
Contents
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On-Site Quick Start
CAUTION
Scheduling of the MGE Field Service Engineers typically should be
done 7 to 10 days before they are required on-site. If the startup of
the UPS is critical to maintaining your schedule, please call the
MGE toll free telephone number at 1-800-438-7373 for assistance.
Final installation and start-up should be completed by a qualified MGE Field Service Engineer.
This On-site Quick Start will guide qualified engineers through unpacking and positioning the unit, the equipment,
tools, and steps required to perform power input/output connections to prepare the unit for MGE Field Service
Engineers to perform on-site final installation and startup.
To insure a successful installation, each of these (4) steps should be followed in their correct sequence.
Note that any unauthorized installation may cause damage to the UPS(s) and void the MGE warranty.
First steps by an on-site qualified Technical Engineer
Step 1.
Step 2.
Step 3.
Step 4.
Unpack and position the unit
Connect the main (utility) power
Connect the output to the power distribution panel
The MGE Field Service Engineer finalizes installation and the startup process.
Optional :
Procedure for temporary power prior to the final startup.
Required Equipment and Tools
The following equipment and tools are recommended for on-site installation:
◗
◗
◗
◗
◗
Digital volt meter (DVM)
1/8 inch slotted screwdriver
Pallet jack/forklift
Conduit installation tools
Nut driver set
86-504004-00 B03
Quick Start
QS —1
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Epilson STS
Step 1 Unpacking
TM
Once the Epsilon STS UPS System has been inspected and received from the shipping courier, the unit should
be moved with the use of a fork lift or pallet jack to a position as close to the final installation location as possible.
Prior to any installation, the following items should be observed upon receipt of the Epsilon STSTM 10-30 kVA UPS.
1. Inspect shipment for any damage prior to receipt. Damage claims should be filed directly with the courier.
Replacements for damaged components should be ordered through MGE Customer Support Services at 1-800-
438-7373.
2. Remove wrapping and foam corners to verify that the equipment nameplate (located on the inside door of the
cabinet) details a system that corresponds with the equipment ordered. See Figure QS-1.
3. The casters on the unit will allow it to be positioned into the final installation location. At this point, the
leveling legs can be adjusted to provide a level and stable footing for the Epsilon STS™ system.
Figure QS-1 Positioning of 200A Epsilon STS™.
LEVELING
CASTERS
JACKS
OPTIONAL SEISMIC
BRACKETS
SECURED USING 3/8 BOLT
QS —2
Quick Start
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Installation and User Manual
Figure QS-2 Positioning of 400/600A Epsilon STS™
LEVELING
JACKS
CASTERS
OPTIONAL SEISMIC
BRACKETS
SECURED USING 3/8 BOLT
86-504004-00 B03
Quick Start
QS —3
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Epilson STS
Step 2 Connection of Utility Power Inputs
Connect Input Power from Two Sources
The Epsilon STS™ systems provides for either top or bottom cable entry. Connections are to be made with 75°C
copper wire cables and using the lugs supplied with the STS unit. Refer to section 2.0 Installation and/or the system
installation drawing(s) for more details (such as cable size and number of conductors).
NOTE:
Three phase input power supplied as a Wye must have a
separate, solidly grounded neutral that will be connected to the STS
neutral busbar. If neutral is not supplied or not required for the load,
connect only three phases and ground.
It is recommended to use isolation transformers so that the neutral of
both AC sources can be grounded to the same potential.
Step 3 Connection of the Load Outputs
The Epsilon STS™ system provides for either top or bottom cable entry. Connections are to be made with 75°C
copper wire cables and using the lugs supplied with the STS unit. Refer to section 2.0 Installation and/or the system
installation drawing(s) for more details (such as cable size and number of conductors).
NOTE:
Input and output cables inside the STS cabinet must be braced at 12”
intervals as shown in Figures QS-3 and QS-4.
For Control Wiring connections refer to section 2.0 Installation.
Figure QS-3 200A STS Input/Output Power Connections.
CONTROL WIRES
THREADED THROUGH
PANDUIT/WIRE-WAYS
TOP ENTRY
CONDUIT PLATE
CONTROL WIRE
PANDUIT/WIRE-WAYS
TB1
TERMINAL
CONTROL
WIRES
COMMUNICATION
CARDS
BRACE AT
12" INTERVALS
BOTTOM ENTRY
CONDUIT PLATE
QS —4
Quick start
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Installation and User Manual
Figure QS-4 400/600A STS Input/Output Power Connections.
TOP ENTRY
CONDUIT PLATE
CONTROL WIRE
PANDUIT/WIRE-WAYS
COMMUNICATION
CARDS
CONTROL WIRES
THREADED THROUGH
UNIT
TB1
TERMINAL
CONTROL WIRE
PANDUIT/WIRE-WAYS
BRACE AT
12" INTERVALS
CONTROL WIRES
BOTTOM ENTRY
CONDUIT PAN
Step 4 Arrival of MGE Field Engineer
The MGE Field Engineer will finalize the initial Epsilon STS™ start-up. To insure a successful installation and
reliable STS service, the MGE Field Engineer will verify all of the installation connections, fusing, and then will
examine the extensive set of Epsilon STS™ personalization parameters to insure that the operation of the STS
exactly matches your installation requirements.
86-504004-00 B03
Quick start
QS —5
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TM
Epilson STS
Optional Steps
Should you require AC power on site prior to the arrival of the MGE Field Engineer, the following procedure will
provide the AC power in the bypass mode. Should you have any questions about this procedure, do not hesitate
to contact MGE Customer Support.
A. Ensure that all switches, CB1-5 in the STS are open (off).
B. Apply input power to the source S1 input of the STS by closing the upstream circuit breaker for source S1. The
STS controls will power up and issues alarm(s). Silence the alarm buzzer by pressing the “Alarm Silence”
pushbutton on the front display panel.
C. Lock CB5 (S2 bypass switch) and remove the lock key (for 4-interlock system, also lock CB2 and remove key).
Using key(s), unlock and close CB4 (S1 bypass switch).
D. At this point, power will be available for site usage until the STS is properly commissioned.
E. Upon arrival of the MGE Field Service Engineer, the main power must be disconnected so that a safe and
proper commissioning of the unit may be accomplished.
WARNING
Do not, under any circumstance, close CB1, CB2, CB3A and
CB3B (if installed) until the unit has been commissioned by an
MGE Field Engineer.
Figure QS-5a 200A STS
Figure QS-5b 400/600A STS
STS MONITOR
STS MONITOR
CB1
CB4
CB1 CB4 CB3A
KEY INTERLOCKS
(2 - STANDARD
4 - OPTIONAL)
CB2 CB5 CB3B
CB2
CB5
KEY INTERLOCKS
(2 - STANDARD
4 - OPTIONAL)
CB3A
CB3B
QS —6
Quick start
86-504004-00 B03
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Introduction
1.0
Scope
TM
Introduction is a general description of system characteristics of Epsilon STS , its intended use and applicable
electrical, mechanical and environmental specifications.
1.1
1.2
Reference Manuals
160304-00 C00 JBUS/RS232, Installation and User manual.
Section Descriptions
Quick Start
This Quick Start will guide qualified engineers through unpacking and positioning the unit, the equipment, tools, and
steps required to perform power input/output connections to prepare the unit for MGE Field Service Engineers to
perform on-site final installation and startup.
1
Introduction
TM,
Introduction is a general description of system characteristics of Epsilon STS
electrical, mechanical and environmental specifications.
its intended use and applicable
2
Setup and Installation
Setup and Installation guides the User through tools and equipment required for making hardwire connections.
Included are power cable connections with wire diagrams for configuring the product to specifications, and
obtaining MGE field service assistance for final installation and startup.
3
Operation
TM
Operation describes Epsilon STS system characteristics of indicators and controls, startup and shutdown proce-
TM
dures, safety checklists, modes and specifications and theory of operating the Epsilon STS system.
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Introduction
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Epilson STS
1.3
General Description
The Epsilon STS™ system is available in two different cabinet sizes. Dimensions for the cabinets are:
◗
200A cabinet: 72”H x 24”W x 30”D
◗
400A/600A cabinet: 72”H x 38”W x 30”D
Both cabinets are designed to provide for top and/or bottom entry of input and output power feeds.
The Epsilon STS™ system can be purchased to accept 208 VAC, 220 VAC, 240 VAC, 440 VAC, 480 VAC, 575 VAC
or 600 VAC utility feed.
Figure 1-1a: Epsilon STS™ - 200A Cabinet.
Figure 1-1b: Epsilon STS™ - 400/600A Cabinet.
Physical Characteristics
Enclosure Type
NEMA 1, Free-standing, modular configured with hinged dead front construction
protecting high voltage areas.
Enclosure Dimensions Depth: 30” (System will pass through standard 36” wide door).
Height: 72”.
Width: 24” for 200A STS; 38” for 400A and 600A STS.
Accessibility
Front access for operation and maintenance. Front or side access for customer power
connection points.
Power Connections/
Busbars
All power connections and terminations to be solid copper braced rated for
100KAIC.(400/600A models may be a combination of copper busbars and cables).
Cable Entry
Mounting
Top and Bottom.
360° Casters and Leveling Jacks with 1” minimum adjustment.
1 — 2
Introduction
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Installation and User Manual
TM
1.4
Epsilon STS System Characteristics
The Epsilon digital Static Transfer Switch (STS) is a solid state, three-phase, break-before-make, dual position
switch designed to connect a critical three-phase load to one of two separate, independent, synchronized sources
of three-phase power. The STS consists of six pairs of SCR's connected in an AC switch configuration. Each 3-
phase input is fed through a molded case automatic switch which provides short circuit protection by means of a
magnetic trip only. The switch then feeds three pairs of “hockey-puck” SCR's, each pair consisting of two SCR's in
an anti-parallel arrangement. The SCR outputs for each corresponding phase from both inputs are then connected
and fed through an output isolation molded case switch to the output terminals. These SCR's are rated to carry the
full 100% load (continuous rated) while operated as stipulated herein and at the maximum ambient temperature
specified. The source to which the load is normally connected to is designated as the “Preferred” source, and the
other redundant, standby source is the “Alternate” source. Selection of which input source is preferred is user selec-
table from the operator control panel, by control contact inputs, or through the communications port(s).
In normal operation, the load is connected to the preferred source as long as all phases of the preferred source are
within the acceptable limits. Upon failure of the preferred source (more degraded than the alternate source), the
load will be transferred to the alternate source until such time as the preferred source returns to within acceptable
limits. The switching action itself is practically instantaneous and the time involved in the operation is mainly the
sensing time required to determine that a transfer is necessary, normally a small fraction of a cycle.
The STS is controlled by a number of system operating variables which define the operation and performance of
the system. Many of these variables may be adjusted for site-specific criteria.
The determination to transfer from one source to the other involves the evaluation of Source Qualities and System
Operating parameters:
Source Quality
Concerns the evaluation of a sources ability to support the critical load by evaluating
the voltage, phase, current and frequency of a source on a real time basis.
System Operating
Parameters control transfers between the two sources, given the state of both
sources and the load together with the specified site-specific operating criteria.
During a transfer (or re-transfer), the SCR's of the loaded source are turned off and the SCR's of the previously
unloaded source are turned on in such a way as to prevent any cross-current between sources, even if the sources
have large phase displacement. Normally, transfer between sources with large phase difference is not allowed.
The molded case switches with magnetic trips will provide short circuit protection only – overcurrent protection must be
provided by upstream and/or downstream devices.
Triple-redundant control power supplies, independent gate drive circuits for each sources SCR switch and other
design features provide the optimal level of reliability and immunity to single point failures. The Epsilon STS™ is
also built to withstand up to 100KA of available short circuit current.
A Bypassing scheme is provided. This can be used to manually bypass the AC load directly to either of the two
power sources and isolate the static switching for servicing.
The Epsilon STS™ is available in three current ratings – 200A, 400A and 600A (208-600V range). The 200A model
is natural convection cooled. The 400A and 600A models use forced air cooling by fans (with one redundant fan).
The STS is designed for installation in a room where humidity and temperature can be controlled. The recom-
mended and maximum environmental parameters are listed in Appendix B, of this document.
The Epsilon STS™ is listed for safety by Underwriters Laboratories, Inc. (UL) under UL Standard 1008.
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Epilson STS
2
2
1.4.1 PMM Plus and PMM Ultra
2
2
In the PMM Plus configuration, the input of the PMM cabinet is supplied by the output of the STS. The dual input
distribution system accepts two independent AC input sources feeding to the STS. If the preferred input source
power is not available, the STS will transfer to the alternate input source, avoiding interruption to the critical load.
The output power is conditioned and stepped down to distribution voltage via an isolation transformer, feeding
panelboards or main frame circuit beakers.
2
In the PMM Ultra configuration, an isolation transformer feeds each STS input source upstream of the STS. The
2
2
transformer secondary output of the PMM -1 (left cabinet) supplies the Source-1 input and PMM -2 (right cabinet)
supplies Source-2 input of the STS cabinet. If the preferred source input power is not available, the STS will transfer
to the alternate input source, avoiding interruption to the critical load. The output of the STS connects to the output
2
2
busbars of the PMM -1 and PMM -2 cabinets, feeding panelboards or main frame
2
2
Figure 1-2: PMM and PMM Ultra Cabinets.
1 — 4
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1.5
System Major Components
Source #1 CB1
Input isolation molded case switch with magnetic trip for isolating SCR static switch
#1 and associated components from source S1.
Source #2 CB2
Input isolation molded case switch with magnetic trip for isolating SCR static switch
#2 and associated components from source S2.
Output CB3A
Output isolation molded case switch with magnetic trip for isolating both static switch
sections from the load.
Output CB3B
Optional, redundant output isolation molded case switch with magnetic trip (paral-
leled with CB3A) for isolating both static switch sections from the load.
Source #1 Bypass CB4
Source #2 Bypass CB5
Keyed Interlocks
Maintenance bypass molded case switch with magnetic trip for bypassing the static
switch section and connecting the load directly to source S1.
Maintenance bypass molded case switch with magnetic trip for bypassing the static
switch section and connecting the load directly to source S2.
Provided on the two bypass switches to prevent closure of both at the same time.
An optional interlocking scheme is available for additional keyed interlocks on the
source isolation switches to ensure that, prior to bypassing to a particular source,
the STS transfers the load to that source if the load is not already being powered by
that source. On closure of a bypass switch, the control logic will also shunt trip
opposite bypass and input isolation switches if necessary to prevent cross-connec-
tion of the two sources.
SCR Static Switch Assy.
Control Electronics
Three heatsink assemblies containing six pairs of “hockey-puck” SCR's. Switch #1
and #2 (each having 3 pairs of SCR's) automatically switch the load to either source
S1 or S2.
The microprocessor-based core control uses FPGA’s for input and output signal
processing and control sequencing to optimize sensing time.
Front Display Panel
The LCD screen, pushbuttons and LED mimic diagram make up the display.
Independent gate drive and acquisition circuits for each sources SCR switch.
Gate Drive & Acq. PCA
Backfeed Protection Assy
A separate redundant circuit for each source provides backfeed protection to ensure
that there is no cross-connection between the two sources in the event of a shorted
SCR on the inactive source with the upstream circuit breaker open.
TVSS Assemblies
Optional Transient Voltage Surge Suppressor on each source input.
Triple-Redundant
Control Power Supplies
Three, independent DC control power supply assemblies (fed from each of the two
sources and the STS output) provide redundant DC control power.
CB Control Assembly
A separate circuit supplies DC control power (fed directly from the output terminals)
for shunt-tripping the power switches CB1-5 and for supplying EPO power even in
maintenance bypass mode.
Output Snubber Assembly Provides preload under no-load conditions.
Communications Card Cage Relay card providing programmable contacts (6 outputs/2 inputs) and JBUS card for
RS232 or RS485 connections. Two slots available for options.
Customer Terminal Block
Terminals for connection of remote Emergency Power Off (EPO) and Source Loss
Test switch.
Fans (400/600A Models only) Ventilation fans provide forced-air cooling in the 400/600A models. 200A models are
convection cooled.
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Epilson STS
Front Display Panel
Comprised of a 4.7” x 3.6” LCD with associated “soft” keys for monitoring status,
alarms, changing certain settings and performing certain operations; an LED “mimic”
diagram display for indicating switch status and power flow; and manual control
pushbuttons for manual transfer functions.
Hard Keys
Manual, dedicated keys (pushbuttons) that have a single function.
Input Power
The Epsilon STS™ is normally connected to two separate, independent sources,
Source S1 and Source S2. Power from each source can be provided by the
electrical utility company, a generator or a UPS.
SCR Switch
Soft Keys
A set of three pairs of SCR's that function as a three-phase, AC switch for each
source.
Programmable keys (pushbuttons) associated with the LCD, that can be used for
several different functions depending on the displayed screen
Static Transfer Switch (STS) All components within the Epsilon STS™ cabinet that function as a system to
transfer the critical load between two independent sources of power using solid-
state SCR switches or bypass to either source using manual bypass switches
2
2
2
PMM Plus
A configuration with the Epsilon STS™ and PMM cabinet. The input of the PMM
2
cabinet is supplied by the output of the STS. Refer to the PMM manual 86-505004-
00 for more details.
2
2
2
PMM Ultra
A configuration with the Epsilon STS™ and PMM cabinet. PMM isolation trans-
formers feed each STS input source upstream of the STS. The transformer
2
secondary output of the PMM -1 (left cabinet) supplies the Source-1 input and
2
PMM -2 (right cabinet) supplies Source-2 input of the STS cabinet. The output of
2
2
the STS connects to the output busbars of the PMM -1 and PMM -2 cabinets,
2
feeding panelboards or main frame circuit beakers. Refer to the PMM manual 86-
505004-00 for more details.
Figure 1-3: Operator Input Display.
HELP KEY
NORMAL OPERATION
A
2A
B
0 KW
1A
1 KVA
C
3A
!
"SOFT" FUNCTION
KEYS
PF 0.0
Preferred
LCD GRAPHIC
DISPLAY
volt
UPS 1
UPS 2
A-B 503 V
B-C 501 V
C-A 507 V
A-B 504 V
B-C 503 V
C-A 508 V
Synchro
60.0 HZ
60.0 HZ
= 0º
MAIN MENU KEY
ALARM SILENCE KEY
LAMP TEST KEY
RETURN TO
PREFERRED
SOURCE
LED STATUS &
MIMIC DIAGRAM
MANUAL OPERATIONS
KEY
LIMITS
MANUAL CONTROL
KEYED SWITCH
1 — 6
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Installation and User Manual
1.6
Single Line Diagram
During normal operation, CB1, 2, 3A and 3B (if installed) are closed and the load receives power from the
designated preferred source through either SW1 or SW2 SCR switch. In the event of a preferred source failure, the
STS will transfer the load to the alternate source in a fraction of a cycle. If bypassed by closing either CB4 or CB5
bypass switch, CB1, 2, 3A and 3B (if installed) are opened, isolating the static switch section for maintenance.
TM
Figure 1-4: Single Line Diagram, Epsilon STS with Options.
CB4
SOURCE
S1
INPUT
CB1
SW1
A
A
B
C
B
C
OUTPUT
SOURCE
#1
FUSE
CB3A
TVSS 1
(OPTION)
A
B
C
A
B
C
AC-DC PS 1
AC-DC PS 2
AC-DC PS 3
N
G
TO
CRITICAL
LOAD
CONTROLS
SW2
CB3B
N
G
SOURCE
S2
INPUT
FUSE
(OPTION)
CB2
TVSS 2
(OPTION)
A
B
C
A
B
C
CB CONTROL
EPO PS
SOURCE
#2
EPO
SHUNT TRIPS
BYPASS LEDs
CB5
N
G
N
G
COMMUNICATIONS
TB1
OPTION OPTION
RELAY
CARD
JBUS/MODBUS
CARD
STS CABINET
1
2
3
4
CARD
CARD
(SEE SECT. 2.5.3) (SEE SECT. 2.5.4)
SOURCE LOSS TEST
(SEE SECTION 2.5.2.2)
EPO
(SEE SECTION 2.5.2.1)
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TM
Epilson STS
1.7
System Specifications
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
10° to 40°C (50° to 104°F).
-10° to 60°C (-14° to 140°F).
Humidity
up to 95% non-condensing (operating).
Altitude
sea level to 8,500 feet without derating.
65 dBA typical at rated load as measured 5 feet from the front of the STS module.
Acoustic noise
1.7.1 Electrical Electrical Characteristics
Nominal Input Voltage
208, 220, 240, 440, 480, 575, 600 VAC 15%, three(3) phase, 3 or 4-wire plus
ground.
Nominal Output
Voltage
208, 220, 240, 440, 480, 575,600 VAC 15%, three(3) phase, 3 or 4-wire plus
ground to correspond with input voltage. .
Maximum Continuous
Current
200, 400, 600 Amps.
250, 400, 600 Amps.
50/60 Hz 5 Hz.
Molded Case Switch
Rating
Input/Output
Frequency
Load Power Factor
Unity to 0.60 lagging or
leading.
Non-Linear Loads
Capability
100% of its rating up to
maximum crest factor of 3.5.
Overload Rating
150% for 15 minutes;
1000% for three(3) cycles.
Source Voltage
Distortion
Up to 10% THD with notching
and ringing transients.
Output Voltage
Distortion
Less than 1% added.
Voltage Transient
Withstand
Up to 6 KV (6000 volt spike) per IEEE C62.41 for Cat. B3. Meets EN 50082-1
(with optional TVSS installed). Such transient levels shall not effect the
operation of the STS. The STS may transfer on over-voltage conditions.
Short Circuit Withstand
Up to 100KA.
Unlimited.
Harmonic Current
(Feedback from the
Load)
Emission Limits
Meets FCC Part 15 Class A, EN 50081-2.
1 — 8
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Installation and User Manual
1.72
Electrical Cable Access and Connections
Electrical connections and other cabinet interconnection will vary depending upon the configuration and options
selected with your Epsilon STS™ system. Refer to the installation drawings supplied with your equipment.
CAUTION:
Before making any electrical connections, verify that all circuit beakers
are in the "off" position. Customer-supplied upstream protective devices
and distribution circuits should be OFF.
2
Risk of Electric Shock. For Plus and Ultra configurations, the PMM
equipment receives power from more than one source. Disconnect all
sources to this equipment before servicing.
1.7.3 Connecting Power Cables
To access the connection terminal busbars, open the front door of the Epsilon STS™. Remove the screws securing
the swing-out control panel (upper panel in the 200A STS) and open it. Remove the safety panel located in the
upper left hand section of the unit.
a) Connect the 3-phase, ground and neutral (if used) conductors of input AC
Source #1 to the Source #1 busbars.
b) Connect the 3-phase, ground and neutral (if used) conductors of input AC
Source #2 to the Source #2 busbars.
c) Connect the 3-phase, ground and neutral (if used) conductors supplying the load to the Output busbars.
d) Securely brace all cables at 12” intervals with cable ties.
e) Replace and secure all panels and covers back in place.rated voltage and tolerances
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Epilson STS
1.7.4 Accessing Electrical Connections
CAUTION:
Only an authorized electrical professional should access electrical con-
nections. A severe shock hazard exists.
The ONLY user serviceable items in the Epsilon STS™ unit are:
A. The input power connections
B. The load connection
C. Any wire connections to the customer control terminal block.
D. The communication card options
The access method for connections made to the communication cards is clearly seen when the front door to the
Epsilon STS™ unit is opened. Figure 1-5 and 1-6 show the panduit wire-ways used to thread wire through the
conduit plates (top or bottom entry). However, access to the input and load power connections is made through
the removal of the safety panel located in the upper left of the Epsilon STS™ front (with the door open). This safety
panel is removed by first removing the screws securing the panel. It can then be removed by lifting the safety panel
away from the unit.
Figure 1-5: 200A STS Power and Control Wire Connections.
CONTROL WIRES
THREADED THROUGH
PANDUIT/WIRE-WAYS
TOP ENTRY
CONDUIT PLATE
CONTROL WIRE
PANDUIT/WIRE-WAYS
TB1
TERMINAL
CONTROL
WIRES
COMMUNICATION
CARDS
BRACE AT
12" INTERVALS
BOTTOM ENTRY
CONDUIT PLATE
Table 1-1: Input/Output Power Connections.
# OF CABLES PER
MINIMUM
CABLE LUG
(SUPPLIED)
CONDUIT
HOLE
DIA. (QTY.)
CABLE SIZE
(75°C, CU)
PHASE
N
GND
1
2
1
# 4/0 AWG
# 4/0, 3/8” STUD
2-1/2” (3)
(T&B L973 OR EQUIV.)
1 — 10
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Installation and User Manual
Figure 1-6: 400/600 STS Power and Control Wire Connections.
TOP ENTRY
CONDUIT PLATE
CONTROL WIRE
PANDUIT/WIRE-WAYS
COMMUNICATION
CARDS
CONTROL WIRES
THREADED THROUGH
UNIT.
TB1
TERMINAL
CONTROL WIRE
PANDUIT/WIRE-WAYS
BRACE AT
12" INTERVALS
CONTROL WIRES
BOTTOM ENTRY
CONDUIT PAN
Table 1-2: Input/Output Power Connections.
STS
# OF CABLES PER
MINIMUM
CABLE SIZE
(75°C, CU)
CABLE LUG
(SUPPLIED)
CONDUIT
HOLE
DIA. (QTY.)
RATING PHASE
(AMPS)
N
GND
400
600
2
3
4
5
1
1
# 250 MCM
# 250 MCM
# 250 MCM, 3/8” STUD
(T&B M973 OR EQUIV.)
# 250 MCM, 3/8” STUD
(T&B M973 OR EQUIV.)
4” (3)
4-1/2” (3)
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Epilson STS
(This page left blank intentionally)
1 — 12
86-504004-00 B02
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Setup and Installation
2.0
Scope
Setup and Installation guides the User through tools and equipment required for making hardwire connections.
Included are power cable connections with wire diagrams for configuring the product to specifications, and
obtaining MGE field service assistance for final installation and startup.
Final installation and start-up should be completed and performed by a qualified MGE Field Service
Engineer.
CAUTION
Scheduling of the MGE Field Service Engineers typically should be
done 7 to 10 days before they are required on-site. If the startup of
the UPS is critical to maintaining your schedule, please call the
MGE toll free telephone number at 1-800-438-7373 for assistance.
To insure a successful installation, each of these (5) steps should be followed in their correct sequence.
Note that any unauthorized installation may cause damage to the UPS(s) and void the MGE warranty.
First steps by an on-site qualified Technical Engineer
Step 1.
Step 2.
Step 3.
Step 4.
Optional:
Unpack and position the unit
Connect the main (utility) power
Connect the output to the power distribution panel
The MGE Field Service Engineer finalizes installation and the startup process.
Procedure for temporary power prior to the final startup.
Required Equipment and Tools
The following equipment and tools are recommended for on-site installation:
◗
◗
◗
◗
Digital volt meter (DVM)
1/8 inch slotted screwdriver
Pallet jack/forklift
Conduit installation tools
◗
Nut driver set
86-504004-00 B03
Installation
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Epilson STS
2.1
Cabinet Placement and Environment
The complete STS system may consist of more than one cabinet depending on whether the STS is a stand-alone
unit or it is used in conjunction with input isolation or output distribution cabinets such as the Power Management
2
2
Module (PMM ) cabinets. Cabinets must be arranged in the required positions to ensure proper connections.
2
When facing the Epsilon STS™ from the front, the standard arrangement provides for any PMM Plus auxiliary
2
cabinets to be located on the right hand side. The PMM Ultra has cabinets located on both sides of the STS. The
2
interconnect cables and side barrier(s) are supplied with the PMM cabinet. The interconnect brackets are
supplied with the Epsilon STS™.
The Epsilon STS™ is intended for use in an environment where control of temperature and humidity is provided.
The maximum operating and recommended environmental parameters are listed in Appendix B.
The Epsilon STS™ cabinets generate heat and exhaust air through the top portion of its enclosures. Air intake is
through the lower front or bottom of the cabinet. All other auxiliary cabinets are convection cooled. To assist you
in planning for your HVAC needs, heat rejection data is provided in Table 2.1 for a worst case scenario (i.e.,
maximum rated power output).
Table 2-1: Heat Rejection Data and Rated Current.
Data
STS Module
Rate
BTU/Hr
200A
5,600
400A
600A
11,400
16,700
2.2
Clearances and FootPrint
As can be seen in the following illustration, the footprint for each cabinet is nominally 30" deep. Additionally,
adequate space must be included in the front of each cabinet (approx. 36") to allow the door of the cabinet to be
opened for service and maintenance procedures.
Figure 2-1: 200STS and 400/600A STS Cabinet Clearances.
CEILING
CEILING
12" MIN.
RECOMMENDED FOR
AIR EXHAUST
12" MIN.
RECOMMENDED FOR
AIR EXHAUST
AIR INLET
(DO NOT BLOCK)
AIR INLET
(DO NOT BLOCK)
AIR INTAKE
FILTER WINDOW
(DO NOT BLOCK)
FLOOR
FLOOR
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2.2.1 Conduit Plate Location (bottom entry)
Cable entry through the bottom is the standard preferred design for the Epsilon STS™ cabinet. Please see the
following figure for the location of the bottom entry conduit plate.
Figure 2-2: 200A /400/600A STS Cabinet Footprint and Top View.
200A STS
REMOVABLE
CONDUIT PAN
10.0 X 7.0 OPENING
REMOVABLE
CONDUIT PLATE
8.3 X 8.3 OPENING
CASTERS
(4 PLACES)
LEVELING JACKS
(4 PLACES)
FOOTPRINT
TOP VIEW
400/600A STS
LEVELING JACKS
CASTERS
REMOVABLE
REMOVABLE
CONDUIT PAN
CONDUIT PLATE
12.4 X 16.5 OPENING
20.6 X 7.3 OPENING
FOOTPRINT
TOP VIEW
2.3
Source #1 AC Input Connections
The connections to be made are the three phases, neutral (if used) and ground cables of input AC Source #1 to the
STS. The main 3-phase cables of input Source #1 are terminated at the Source #1 input busbars. Neutral (if
supplied) and Ground cables are terminated at the Neutral (N) and Ground (GND) busbars respectively. All cables
from Source #1 should be run in a single conduit separately from all other cables (power supply or computer-system
interconnection cables). They should not pass near interference-emitting equipment or sensitive loads. Complete
wiring instructions for your installation are provided on the installation drawings supplied with the equipment. See
Figure 1-5 and 1-6, refer to table 1-1 and 1-2 for details.
2.3.1. Source #2 AC Input Connections
The connections to be made are the three phases, neutral (if used) and ground cables of input AC Source #2 to the
STS. The main 3-phase cables of input Source #2 are terminated at the Source #2 input busbars. Neutral (if
supplied) and Ground cables are terminated at the Neutral (N) and Ground (GND) busbars respectively. All cables
from Source #2 should be run in a single conduit separately from all other cables (power supply or computer-system
interconnection cables). They should not pass near interference-emitting equipment or sensitive loads. Complete
wiring instructions for your installation are provided on the installation drawings supplied with the equipment. See
Figure 1-5 and 1-6, refer to table 1-1 and 1-2 for details.
2.3.2 AC Output Connections
The connections to be made are the three phases, neutral(if used) and ground cables from the load to the STS.
The main 3-phase cables from the load are terminated at the Output busbars. Neutral(if supplied) and Ground
cables are terminated at the Neutral(N) and Ground(GND) busbars respectively. All cables from the load should be
run in a single conduit separately from all other cables(power supply or computer-system interconnection cables).
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They should not pass near interference-emitting equipment or sensitive loads. Complete wiring instructions for your
installation are provided on the installation drawings supplied with the equipment.
2.3.3 Remote Emergency Power Off (REPO) Cable Connections
Control connections are available for “Remote Emergency Power Off” (REPO) through a customer-supplied
normally open dry contact or pushbutton.
a) Connect the emergency power off N.O. contact or pushbutton to terminals 1 and 2 of the customer terminal
block TB1. Run control wires in the wireway provided in the front portion of the STS cabinet. See Figures 1-5
and 1-6, they show the panduit wire-ways used to thread wire through the conduit plates ( top or bottom entry).
b) If two or more STS’s are connected in parallel to a single REPO contact or pushbutton, ensure that each side
of the contact or pushbutton is connected to the same terminal on all the STS’s.
2.3.4 Remote Source Loss Test Cable Connections
Control connections are available for “Remote Source Loss Test” through a customer-supplied normally open dry
contact or pushbutton.
a) Connect the source loss test N.O. contact or pushbutton to terminals 3 and 4 of the customer terminal block
TB1. Run control wires in the wireway provided in the front portion of the STS cabinet. See Figures 1-5 and
1-6, they show the panduit wire-ways used to thread wire through the conduit plates ( top or bottom entry).
b) If two or more STS’s are connected in parallel to a single Source Loss Test contact or pushbutton, ensure that
each side of the contact or pushbutton is connected to the same terminal on all the STS’s.
Figure 2-3: Control Connections
TB1
REMOTE EPO
N.O. CONTACT
OR PUSHBUTTON
2
1
3
4
REMOTE
SOURCE LOSS TEST
N.O. CONTACT
OR PUSHBUTTON
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2.3.5 Connection of the Relay Communication Card
The relay communications card contains six programmable dry contact outputs and two programmable dry contact
inputs, and is standard on the Epsilon STS™. The inputs and outputs are factory programmed according to
functions listed in Table 2-2.
Table 2-2: Relay Contacts (communications card)
Inputs
Factory Setting
Options (available on both contacts)
- Reset Memorized Faults.
- Select Source S1as Preferred.
- Select Source S2 as Preferred.
- Enable Automatic Retransfer.
- Disable Automatic Retransfer.
- Enable Transfers.
1.A
1.B
- Select Source S1 as Preferred.
- Select Source S2 as Preferred.
- Disable Transfers.
Note: 1. Power sources connected to card must be equipped with protection devices with a maximum breaking capacity of 2A.
2. Connections must be form “C” Dry Contacts.
Outputs
Factory Setting
Options (available on all contacts)
- Power supplied to Load.
- Summary Alarm (source or STS fault).
- STS Fault.
1.1
1.2
1.3
1.4
1.5
1.6
- Power supplied to Load.
- Summary Alarm
(source or STS fault).
- STS Fault.
- Source S1 Out-of-Tolerance.
- Source S2 Out-of-Tolerance.
- Sources Out-of-Phase.
- Source S1 Active.
- Source S2 Active.
- Source S1 is Preferred Source.
- Automatic Transfer Disabled.
- Overload Condition.
- Overload Condition.
- Source S1
Out-of-Tolerance.
- Source S2
Out-of-Tolerance.
The indications 1.X become 2.X for a second optional card of the same type.
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2.3.6 Characteristics of the Output Contacts
Relay type
Max. voltage
Max. current
Cable
Normally Open.
250VAC, 30VDC.
2A.
4 x 18 AWG, cover plate hole diameter 0.26 inch 0.01 inch
Figure 2-4: Output Contacts.
6
5
4
3
2
1
B A
2.3.7 Characteristics of the Input Contacts
Switched voltage
Consumption
Cable
5 VDC.
10 mA.
4 x 22 AWG, hole diameter 0.2 inch 0.02 inch
Output alarms are always activated on the conditions stated unless requested by the customer to operate on other
conditions.
Input contacts are designed for remote STS operation. Use extreme caution when using these contacts so as not to
endanger persons or compromise the STS load.
CAUTION:
Isolate and lock-out all power sources for this card before
making connections. Never connect ELSV (governed by UL1778)
and non-ELSV circuits to the different outputs of the same card.
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2.3.8 Removing the Communications Card Cover
a) Remove the cover “3” secured by the screws “1”.
b) Run the communications cables through the cable entry holes “4”.
c) Connect the conductors to the input “6” and output “5” terminal blocks (see connection example in diagram
below).
Figure 2-5: Removing the Communications Card Cover.
1
2
3
5
2
6
5
4
3
2
1
4
5
4
B
A
6
6
5
4
3
2
1
B
A
6
3
7
2.3.9 Replacing the Cover
d) Put the cover back in place and secure it with the screws “1”.
e) Tighten the screws “7” to clamp the cables.
f) Indicate the locations of the power sources on the labels.
g) Insert the card in its slot.
h) Secure the card with two screws “2”.
Figure 2-6: Replacing the Communications Card Cover.
1
2
2
7
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2.4
Setting Operation Mode
Set DIP switch SA1 for one of the following configuration modes:
First Card
Second Card (optional)
Standard Mode (default)
Standard Mode (default)
All switches OFF
SA1 switch 1 ON
SA1
SA1
8
8
1
1
ON
OFF
ON
OFF
First Card
Programmable Mode
Second Card (optional)
Programmable Mode
SA1 switch 3 ON
SA1 switches 1 & 3 ON
SA1
SA1
8
8
1
1
ON
OFF
ON
OFF
Figure 2-7: SA2 and Dip switch location on communication card.
SA1
SA2
SA1 DIP Switch
SA2 DIP Switch
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2.5
Setting the Output Relay Contacts and Input Switching States
Set DIP switch SA2 for one of the following configuration modes:
N.O. Setting (default)
All switches OFF
SA1
8
NOTE:
1
By default, all the relay contacts are
ON
OFF
Normally Open (NO) (see section 1.4):
◗ Contact open = relay not controlled.
◗ Contact closed = relay controlled.
N.C. Setting
By default, the inputs are activated when the
external contact is closed (NO):
All switches ON
SA2
◗ External contact open = input not activated.
◗ External contact closed = input activated.
8
N.C.
N.O.
1
ON
OFF
It is possible to individually set each relay and input to N.O. or N.C. mode by setting each switch on SA2 individu-
ally. The parameters for relays 1 to 6 are set using SA2 DIP switches 1 to 6 respectively. The parameters for inputs
A and B are set using SA2 DIP switches 7 and 8 respectively.
When the SA2 DIP switch is set to OFF, the relay/input is set to N.O.
When the SA2 DIP switch is set to ON, the relay/input is set to N.C.
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2.5.1 Connection of the JBUS Communication Card
The JBUS communications card provides two DB-9 ports (RS232 and RS485 communications). Only one commu-
nication port may be used at a time.
For information on using the communication card, see the JBUS communication card manual.
Figure 2-8: JBUS Communication Card.
5
4
3
2
1
9
8
7
6
RS232:
Pin 2: Rxd (or Txd)
Pin 3: Txd (or Rxd)
Pin 5: Com (shield)
RS485:
JBUS
MODBUS
Pin 4: Rx-
Pin 5: Tx-
Pin 8: Rx+
Pin 9: Tx+
2.6
Check Points Before and After Start Up
Before starting the Epsilon STS™, be certain that you fully understand the operation of the indicators, controls, and
operational sequences. MGE UPS SYSTEMS,INC. offers professional start up services in most countries. It is
suggested that before applying power to your Epsilon STS™, your contract with MGE for a professional start up with
an MGE Field Engineer.
2.6.1 Pre-Start Up Safety Check List
◗
◗
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
STS and load requirements.
◗
◗
The input voltage is the same as indicated on the STS nameplate, located inside the door of the Epsilon
STS™ module.
The air filters located inside the STS module door (400/600A units only) are properly installed and free of
dust, dirt, and debris. Make certain that no objects block the air intake underneath and around the front
bottom of the STS module and the air exhaust on the top of the STS module is free of obstructions.
◗
◗
All switches in the STS, CB1-5, are in the OFF (open) position.
All panels and covers are replaced and secured back in place.
2.6.2 Post-Start Up Safety Check List
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.
Remote emergency power off (REPO) test (if applicable).
STS start up on preferred source.
Transfer test on preferred source loss.
Maintenance bypass procedure.
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Operation
3.0
3.1
Scope
TM
Operation describes Epsilon STS system characteristics of indicators and controls, startup and shutdown proce-
dures, safety checklists, modes and specifications and theory of operating the Epsilon STS system.
TM
Preparation for Operation
Several items must be considered when preparing the Epsilon STS™ system for operation.
Configuration
The STS cabinet and any auxiliary cabinets (such as PMM cabinets containing power
distribution panels, transformers, etc.) must be arranged in the required configuration
to insure that the interconnection cables are located in the correct adjacent cabinets.
Location
The cabinets must be situated in a location that provides for proper air flow and heat
rejection.
Environment
The room in which the Epsilon STS™ system is located must maintain environmental
conditions within recommended tolerances.
Electrical Connections
All electrical connections must utilize the top or bottom conduit entries provided. See
section 2 for details for connections.
The following sections discuss in more detail these items.
3.2
Pre-Start Up Safety Check List
◗
◗
◗
◗
Ensure all power and control wires have been properly connected and securely tightened. Recheck phase
rotation for both sources and proper grounding of the equipment.
Check to see that the upstream and downstream protective devices are not tripped, and have been sized
properly for the STS and load requirements.
Check that the input voltage is the same as indicated on the STS nameplate, located inside the door of the
Epsilon STS™ module.
Verify that the air filters located inside the STS module door (400/600A units only) are properly installed and
free of dust, dirt, and debris. Make certain that nothing is blocking the air intake underneath and around the
front bottom of the STS module and that the air exhaust on the top of the STS module is free of all obstructions.
◗
◗
◗
◗
Verify that all switches, CB1-5 in the STS are in the “off” (open) position.
All panels and covers are replaced and secured back in place.
Check to see that the cabinet is resting on its the lifting leveler and not on the 4 casters.
Check that the load-circuit beakers (where applicable) are in the "OFF" position.
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3.2.1 Normal Start Up Procedure
With all of the initial safety check points verified, the Epsilon STS™ system can now be powered. The following
procedure should be used after the Epsilon STS™ system has been commissioned (typically by an MGE Field
Service Engineer).
1. Ensure that all switches, CB1, 2, 3A, 3B(if installed), 4 and 5 in the STS are OFF (open).
2. Energize both input sources and check for correct voltage, phase rotation and source synchronization. The
STS controls will be powered up and the display LCD should turn on. The LED indicators and mimic diagram
should also be functioning. The display and buzzer may indicate an alarm since the source isolation switches,
CB1 and CB2 are open.
3. If external load circuit breaker(s) are not installed between the STS output and the load, check that the load is
ready for power application.
4. Check that Source #1 is the preferred source (factory default setting) – as indicated on the LCD display and the
“Preferred Source S1” LED located in the mimic diagram.
5. Close the Source #1 bypass switch, CB4, which connects the output to Source #1, bypassing the static switch
section. Output is now energized by Source #1. The bypass switches are interlocked – see note.
NOTE
CB4 and CB5 bypass switches are key-interlocked.
The standard 2-interlock system, lock the opposite bypass
switch and remove the key (for the optional 4-interlock system,
it is also necessary to open the opposite source isolation
switch (CB1 or CB2), lock it, remove the key). Using the
removed key(s), unlock and close the selected bypass switch.
6. Apply power to the load by closing the load-circuit beakers (if installed), including PMM power distribution circuit
beakers (where applicable).
7. Close the Source #1 (preferred) isolation switch, CB1. The STS will turn on the preferred source SCR Switch
1. Verify on the LED mimic diagram on the front display panel. Also check the operating status on the LCD screen.
8. Close the Source #2 (alternate) isolation switch, CB2. Verify on the LED mimic diagram on the front display
panel. Also check the operating status on the LCD screen – no alarms should be displayed.
9. Static switch operation may now be checked by opening the preferred source isolation switch, CB1. The STS
will transfer to the alternate source. Verify on the LED mimic diagram on the front display panel. Also check
the operating status on the LCD screen.
10. Re-close the preferred source isolation switch, CB1. After the preset retransfer time delay, the STS will retransfer
back to the preferred Source #1.
11. Close the STS output isolation switch(es), CB3A (and CB3B if installed). Source #1 power is now supplied
through the static switch to the output of the STS.
12. Open (and lock) the Source #1 bypass switch, CB4. The load is now supplied through the static switch. Verify
on the LED mimic diagram on the front display panel. Also check the operating status on the LCD screen.
13. The STS is now in the normal operating mode:
CB1, CB2, CB3A and CB3B(if installed) - CLOSED.
CB4 AND CB5 - OPEN
LCD screen - Normal Operation
LED Mimic diagram - “Source S1 Available”, “Source S2 Available”, “CB1”, “CB2”, “Switch 1”, “CB3”, “Load”
and “In Sync” LED's on.
3 —2
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3.2.2 Post Start Up Safety Check List
After initial start up of the system, normal operation of the STS should be verified. At the minimum, the following should
be checked as applicable to your installation:
◗
Remote emergency power off (REPO) operation (all switches in the STS should trip off). After this test, reset
all switches in the OFF position and repeat the start up procedure.
◗
◗
◗
Maintenance bypass procedure.
Proper readings on the LCD display for Voltages, Current, Frequency and Power.
Operation of the Manual Control pushbuttons (“hard keys”) on the front panel.
CAUTION
EXPOSURE TO HAZARDOUS VOLTAGES.
Dangerous voltage levels are still present inside the
STS cabinet. When bypassed/isolated, control power
supply circuits are still live and power is
provided for indicator lights and emergency power off
circuits. Disconnect all sources of power before
servicing. Refer servicing to qualified service
personnel.
3.2.3 Shutdown Procedure
To isolate and shutdown the static switch section of the STS:
1. Check that the desired bypass source is available and that the LCD and mimic diagram display indicate that the
static switch is on the desired bypass source.
2. Follow the Bypass Procedure to bypass the static switch and connect the load through the bypass switch to the
desired bypass source. Isolation switches CB1, CB2, CB3A and CB3B (if installed) will be in the OFF (or
Tripped) position.
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3.3
Transfer Operations
3.3.1 Automatic Transfers
Automatic transfer of the load from one source to the other is accomplished by turning off the active source SCR's
and turning on the inactive source SCR's in a sequence and timing that allows a combined sense and on transfer
time of less than one quarter cycle (4.17ms). Automatic transfer is initiated under any of the following conditions,
provided transfer is authorized and the “inactive” source is not more degraded than the “active” source:
a) Under-voltage on any phase of the active source.
b) Over-voltage on any phase of the active source.
c) Under-frequency of the active source.
d) Over-frequency of the active source.
e) Open SCR on the active source (transfer to inactive source, then shunt trip the active C.B. and inhibit
retransfer until repair is made and the system is reset).
f) Shorted SCR on the inactive source (transfer to shorted inactive source, then shunt trip the previously active
C.B. to prevent retransfer. Inhibit transfers and retransfers until repair is made and the system is reset).
g) SCR Over-temperature on the active source (if there are no current overload faults, transfer to inactive source
and inhibit re-transfer until repair is made and the system is reset. If inactive source subsequently fails, transfer
back to the active side if it is within acceptable limits, including over-temperature limits).
h) SCR Gate Drive power supply failure on the active source (transfer to inactive source and inhibit re-transfer
until repair is made and the system is reset).
i) TVSS failure on the active source (if optional TVSS is installed).
3.3.2 Manual Transfers
The STS can be operated as a manual switch when the Manual Control keyed switch on the front panel is in the
ON position, enabling the manual control pushbuttons and some setpoint changes, for the following manual opera-
tions:
a) Manual Change Preferred Source Pushbutton – Selects other source as Preferred, causing a transfer (without
break) to the selected source if it is available and within acceptable limits and is not the active source. If the
two sources are outside the preset in sync phase window, a transfer (with break) can be made by pressing the
manual Override Limits pushbutton simultaneously.
b) Manual Return to Preferred Source Pushbutton - If auto-retransfer is disabled, pressing this pushbutton will
initiate a retransfer back to the preferred source, overriding owner selected auto retransfer time delay.
To prevent normal automatic transfers, the operator can use the Change Preferred Source pushbutton to transfer
to the desired source, and then shut down the feeder to the other inactive source.
3.3.3 Automatic Retransfers
Automatic retransfer of the load from the alternate source back to the preferred is accomplished by turning off the
active alternate source SCR's and turning on the inactive preferred source SCR's in a sequence and timing that
allows a combined sense and transfer time of less than one quarter cycle (4.17ms). Providing the inactive preferred
source is not more degraded than the active alternate source, retransfer will occur under the following conditions:
a) If retransfer is not prohibited, retransfer will occur after an owner selected time delay after the preferred source
becomes available and within acceptable limits.
b) If retransfer is prohibited, retransfer can be manually initiated by pressing the manual Return to Preferred
Source Pushbutton (Pre-conditions: Manual Control switch in ON position; inactive preferred source is
available and within acceptable limits). Transfer is temporarily authorized for a preset time.
3 —4
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3.3.4 Transfer Authorization/Prohibition
Transfer is prohibited under the following conditions:
a) Transfer Prohibit Input from the operator control panel, control contact input, or communications port.
b) Peak Current Overload.
c) External Power Fault (peak current overload caused by undervoltage) - Memorized.
d) Overtemperature (active or inactive switch) - Memorized. Reset fault from alarm menu. If the fault persists, call
MGE Customer Service.
e) Shorted SCR (active or inactive switch) – Memorized. Reset fault from alarm menu. If the fault persists, call
MGE Customer Service.
f) Open SCR (active switch) – Memorized. Reset fault from alarm menu. If the fault persists, call MGE Customer
Service.
g) Reverse Power.
h) Inactive source Out-of-Tolerance.
i) Inactive source Power Supply Fault.
j) Phase Rotation Fault.
k) Inactive source input isolation switch open.
3.4
Maintenance Bypass/Molded Case Switches/Live System Test
3.4.1 Switch Arrangement
A manually operated maintenance bypass switching arrangement is included to permit complete isolation of the
static switch SCR assemblies for servicing without disrupting power to the critical loads. The maintenance bypass
consists of :
a) STS input isolation switch. One for each static switch SCR assembly (two total - CB1, CB2).
b) STS output isolation switch. One for both static switch SCR assemblies (one total - CB3A). A second redundant
output isolation switch (CB3B) is available as an option.
c) Maintenance bypass switch. One for each static switch SCR assembly (two total – CB4, CB5).
All STS switches are automatic with magnetic trip only with plug-in bases for ease of removal for replacement, calibra-
tion or testing, without interruption of power to the critical load. All switches are equipped with shunt trips and
auxiliary contacts. Continuously activated shunt trips will not allow closing of the switch (not even as much as a
contact to contact touch).
3.4.2 Electrical Bypass Switch Interlock
If either maintenance bypass switch is closed, the opposite maintenance bypass switch will be electrically shunt
tripped.
3.4.3 Electric Input-Bypass Switch Interlock
If the output switch and either maintenance bypass switch is closed, the opposite input isolation switch will be
electrically shunt tripped.
3.4.4 Mechanical Key Interlocks
Mechanical Kirk key interlocks are provided on the two maintenance bypass switches (CB4 and CB5) to prevent an
operator from closing both bypass switches at the same time. A single key allows closure of one switch at a time.
Additional key interlocks on the two STS input isolation switches (CB1, CB2) to ensure that the STS is on the source
that the operator intends to bypass to, are available as an option.
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3.4.5 Live System Test (Except with 4-Interlock System)
While in maintenance bypass, and with the STS output isolation switch off, the STS can be tested with both sources
connected to the STS through the input isolation switches (using the SCR's to make actual transfers).
3.4.6 EPO
In the event of an Emergency Power Off (EPO) condition, all switches are shunt tripped.
3.5
3.6
Preferred Source Selection (Symmetrical Operation)
At the operators option and without any degradation of performances or loss of protective features, the unit may be
operated with either source designated as the preferred source and the current alternate source can be switched
to be the preferred source (using LCD screen, the manual hard key, comm. port or remote input contact).
Sensing and Transfer Times
Voltage and/or current sensing using fast digital conversion techniques are employed for both sources to meet a
maximum 2 milliseconds sensing time requirement (to sense a deviation of power quality outside of user parame-
ters).
Total sense and transfer time is 1/4 cycle (4.17 milliseconds) maximum.
3.7
Overload Operation
On sensing a Peak Current Overload (Crest factor setting: 3.5 maximum.), automatic transfers will be inhibited and
the load will stay on the “active” source until the overload condition is cleared.
On sensing Peak Current Overload condition, a check is made for an under-voltage condition indicating that the
under-voltage condition caused the overload. Automatic transfer is inhibited and the load will stay on the active
source until the overload condition is cleared and the system is reset (this fault condition is memorized).
An Overload alarm will be given if the load current exceeds the RMS current overload setting for more than 30
seconds. This overload condition will not cause an automatic transfer.
3.8
Shorted SCR Protection (including Backfeed Protection)
The STS design includes sensing circuits to detect a shorted SCR and in addition to the following actions, will initiate
audible and visual alarms:
a) In the event of a shorted SCR in the active source powering the load, the unit will alarm, and stay on the active
source. Then the SCR isolation switch on the inactive source will be shunt tripped to prevent transferring to the
inactive source. Automatic transfer and retransfer will be inhibited until repair is made and the system is reset.
b) In the event of a shorted SCR in the non-conducting SCR in the inactive source that is not powering the load at the
time, the unit will alarm. The STS will immediately transfer the load to the inactive source to eliminate cross-connect
current between the shorted sources. The SCR isolation switch in the previously active source will be shunt tripped
to prevent retransfer. Automatic transfer and retransfer will be inhibited until repair is made and the system is reset.
A separate redundant backfeed protection circuit is provided.
3 —6
Operation
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3.9
Open SCR Protection
The STS design includes sensing circuits to detect an open SCR and in addition to the following actions, will initiate
audible and visual alarms:
In the event of an open SCR in the active source powering the load, the unit will alarm and immediately transfer to
the inactive source. Then the SCR isolation switch on the previously active source will be shunt tripped. Automatic
retransfer will be inhibited under such conditions until repair is made and the system is reset.
3.10
3.11
Source Cross-Connection Protection
The STS transfer logic will check that the two input sources, of any combinations, are never connected in a fashion
to allow current flow from one source to the other without first passing through the load. The logic circuitry has
protective sensing circuits that prohibit this conduction. Transfers and retransfers between sources will be break-
before-make to prevent any cross-conduction, even in out-of-phase conditions.
Bypass Procedure
Bypass Load to Source #1
1. The Source #1 SCR Switch #1 must be indicated closed on the display panel. If not, transfer the load to Source
#1 by turning the Manual Control key switch on the front display panel to the “ON” position and pressing the
Change Preferred Source Pushbutton. The STS should transfer to Source #1.
2. Open Source #2 isolation switch, CB2. (For 4-interlock system, lock and remove the key).
3. Lock Source #2 bypass switch, CB5, and remove the key.
4. Using the key(s), unlock and close Source #1 bypass switch, CB4. CB1, CB3A and CB3B (if installed) will shunt
trip, isolating the static switch section.
Return to Normal Operation (load on Source #1)
1. Close Source #1 isolation switch, CB1.
2. Wait for indication on the display panel that Source #1 SCR Switch #1 is closed.
3. Close Output isolation switch(es), CB3A and CB3B (if installed).
4. Open Source #1 bypass switch, CB4, and lock.
5. Close Source #2 isolation switch, CB2. (For 4-interlock system, remove key from CB4 lock to unlock CB2, and
close CB2).
86-504004-00 B03
Operation
3 —7
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Epilson STS
Bypass Load to Source #2
1. The Source #2 SCR Switch #2 must be indicated closed on the display panel. If not, transfer the load to Source
#2 by turning the Manual Control key switch on the front display panel to the “ON” position and pressing the
Change Preferred Source Pushbutton. The STS should transfer to Source #2.
2. Open Source #1 isolation switch, CB1. (For 4-interlock system, lock and remove the key).
3. Lock Source #1 bypass switch, CB4, and remove the key.
4. Using the key(s), unlock and close Source #2 bypass switch, CB5. CB2, CB3A and CB3B (if installed) will shunt
trip, isolating the static switch section.
Return to Normal Operation (load on Source #2)
1. Close Source #2 isolation switch, CB2.
2. Wait for indication on the display panel that Source #2 SCR Switch #2 is closed.
3. Close Output isolation switch(es), CB3A and CB3B (if installed).
4. Open Source #2 bypass switch, CB5, and lock.
5. Close Source #1 isolation switch, CB1. (For 4-interlock system, remove key from CB5 lock to unlock CB1, and
close CB1).
Test Mode (Except with 4-Interlock System)
1. Bypass the load to Source #1 or #2 (see above procedures).
2. Close both source isolation switches, CB1 and CB2.
3. The static switch may now be tested without disturbing the load.
CAUTION:
EXPOSURE TO HAZARDOUS VOLTAGES.
Dangerous voltage levels are still present inside the
STS cabinet. When bypassed/isolated, control power
supply circuits are still live and power is provided for
indicator lights and emergency power off circuits.
Disconnect all sources of power before servicing.
Refer servicing to qualified service personnel.
3 —8
Installation
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Installation and User Manual
3.12
Front Panel
The Epsilon STS™ system is simple to operate and yet provides a wealth of continuous monitoring and diagnostic
features to insure the proper operation of the unit.
Operators gain access to information in the Epsilon STS™ system through the operator interface. This display
panel and keyboard is conveniently located on the front of the STS cabinet. (See Figure 3-1, page 3-10).
Operator Interface - The Epsilon STS™ Operator Interface provides an easy to use method to access and control
the Epsilon STS™ features. Through the use of four (4) "soft" keys and four (4) dedicated purpose keys, the
operators can quickly move through the available displays, and control the performance of the unit.
The operation of the Epsilon STS™ is designed to require minimal operator interaction, and yet it provides, as can
be seen in the previous sections, a multitude of displays and menus to provide information about and capabilities
to control the system.
The final appendix sections of this manual are included to provide general and technical information concerning the
Epsilon STS™ product line as well as terminology that will prove useful in discussions about STS and other power
systems in general.
MGE UPS Systems is pleased that you have selected our product to protect the AC power in your facility or instal-
lation. Should you have any questions about this manual or the Epsilon STS™ product, please do not hesitate to
contact MGE Customer Support at 1 800 523-0142.
86-504004-00 B03
Installation
3 —9
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Epilson STS
3.13
Front Display Interface Panel
Figure 3-1: Front Display Interface Panel.
HELP
NORMAL OPERATION
?
A
2A
B
1A
1 KVA
C
3A
0 KW
!
PF 0.0
Preferred
volt
UPS 1
UPS 2
A-B 503 V
B-C 501 V
C-A 507 V
A-B 504 V
B-C 503 V
C-A 508 V
Synchro
60.0 HZ
60.0 HZ
= 0º
MAIN
MENU
SOURCE S1
AVAILABLE
SOURCE S2
AVAILABLE
S1
S2
PREFERED SOURCE
ALARM
SILENCE
IN SYNC
LAMP
TEST
CB1
CB2
ALARM
RETURN TO
PREFERRED
SOURCE
SWITCH 1 SWITCH 2
CHANGE
PREFERRED
SOURCE
OVERRIDE
LIMITS
CB4
CB3
CB5
ON
OFF
LOAD
MANUAL CONTROL
3 —10
Operation
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Figure 3-2: LCD Normal Operation Screen
Visual/Audible Alarms
-access separate screen to view alarms.
Load Meters
-Current (ØA, B, C)
-KVA
-KW
-Power Factor (PF)
NORMAL OPERATION
B 200A C 200A
133 KW 166 KVA
A 200A
Preferred Source
Indication
0.8 PF
Preferred
Synchro
Source S2 Name
(field programmable)
Source S1
Source S2
V1 480V
V2 480V
V3 480V
V1 480V
V2 480V
V3 480V
Source S2 Meters
-Voltage (Ø's A-B, B-C, C-A)
-Frequency (Hz)
60.0 HZ
60.0 HZ
= 0°
Current Flow Indication
for Source S2
Phase Difference
Meter
Source S1 Name
(field programmable)
Source S1 Meters
-Voltage (Ø's A-B, B-C, C-A)
Current Flow Indication
for Source S1
86-504004-00 B03
Operation
3 —11
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Epilson STS
Figure 3-3: Manual Operation Pushbuttons.
Alarm Silence pushbutton
Lamp Test pushbutton
- always active
- silences audible alarm horn
- turns on all LEDs on the front panel
- sounds the audible alarm horn
ALARM
SILENCE
Return to Preferred Source pushbutton
- temporarily enables auto-retransfer when
retransfer function is switched off (re-transfer
disabled) and initiates a retransfer back to the
preferred source, overriding the owner selected
auto retransfer time delay. Auto-retransfer will
again be disabled after the re-transfer is
completed.
LAMP
TEST
RETURN TO
PREFERRED
SOURCE
- requires MANUAL CONTROL switch to be
in the ON position.
CHANGE
PREFERRED
SOURCE
Change Preferred Source pushbutton
- selects other source as preferred, causing
a transfer to the selected source if it is not
the active source.
OVERRIDE
LIMITS
- requires MANUAL CONTROL switch to be
in the ON position.
ON
OFF
Override Limits pushbutton
- enables manual transfers in out-of-phase conditions
when depressed simultaneously with the CHANGE
PREFERRED SOURCE pushbutton.
- requires MANUAL CONTROL switch to be in
the ON position.
MANUAL
CONTROL
Manual Control keyed switch- The "Return to Preferred Source", "Change
Preferred Source" and "Override Limits"
manual control pushbuttons are active
(enabled) in the "ON" position,
and inactive (disabled) in the "OFF"
position.
3 —12
Operation
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Figure 3-4: LED Mimic Diagram.
SOURCE #1
SOURCE #2
SELECTED AS
PREFERRED-
YELLOW LED
SELECTED AS
PREFERRED-
YELLOW LED
SOURCE #1
SOURCE #2
SOURCE 1
AVAILABLE
SOURCE 2
AVAILABLE
AVAILABLE
AVAILABLE
GREEN LED-LIT
WHEN SOURCE #1
POWER IS APPLIED
TO SOURCE S1 INPUT
GREEN LED-LIT
WHEN SOURCE #2
POWER IS APPLIED
TO SOURCE S2 INPUT
S1
S2
PREFERRED
SOURCE
IN SYNC
SOURCE #1
IN SYNC-
INPUT C.B.
GREEN LED
GREEN LED-LIT
WHEN CLOSED
CB1
CB2
ALARM
SOURCE #2
INPUT C.B.
GREEN LED-LIT
WHEN CLOSED
SUMMARY
ALARM-RED LED
SWITCH 1 SWITCH 2
STATIC SWITCH #1
GREEN LED-LIT
WHEN SCR1 ON
STATIC SWITCH #2
GREEN LED-LIT
WHEN SCR2 ON
CB4
CB3
CB5
SOURCE #1
SOURCE #2
BYPASS C.B.
GREEN LED-LIT
WHEN CLOSED
BYPASS C.B.
GREEN LED-LIT
WHEN CLOSED
LOAD
OUTPUT POWER
TO LOAD
GREEN LED-LIT
WHEN OUTPUT
POWER IS ON
STS OUTPUT
ISOLATION C.B.
(CB3A AND/OR CB3B)
GREEN LED-LIT
WHEN CLOSED
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Operation
3 —13
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Epilson STS
3.14
Operator Interface Screens
The screen displays contained on the Epsilon STS™ Operator Interface provide an easy to use method to access
and control the STS features. A screen saver feature will blank out the LCD screen after the Epsilon STS™ has
been in continuous operation for a while.
Figure 3-5: LCD Display Screens.
Initial screen
Main screen
NORMAL OPERATION
MAIN MENU
A
2A
B
1A
C
3A
Transfer
Alarms
0 KW
1 KVA
PF 0.0
0
1
0
1
0
1
0
1
0
1
0
1
UPS 1
preferred
synchro
Status
UPS 2
E
S
C
A-B 503V
B-C 501V
C-A 507V
60.0 Hz
A-B 504V
B-C 503V
C-A 508V
60.0 Hz
Measurements
Setup
VOLT
Maintenance
= 0°
Transfer
Status
Setup
Alarms
MANUAL TRANSFERT
ALARMS
Transfer without break
Transfer with break
Measurements
STATUS
CURRENT MEASUREMENTS
VOLTAGE MEASUREMENTS
FREQUENCY MEASUREMENTS
EVENT LOG
STATISTICS
POWER MEASUREMENTS
LOAD MEASUREMENTS
SETUP
LANGUAGE
ADJUST DATE AND TIME
CONTRAST
Maintenance
MAINTENANCE
DISPLAY TEST
UNIT ON BYPASS
BUZZER VOLUME
SOURCE NAMES
NEW PASSWORD
PERSONALIZATION
DRY CONTACT SETTINGS
3 —14
Operation
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3.15
Epsilon STS™ Customization
Certain parameters can be customized as follows:
1. Press the <Menu> button.
2. Select <Setup>, then <Customization> using the function buttons marked
or
.
❚
3. Confirm by pressing the function button marked ꢀ
4. Enter the password (default factory password is “0 0 0”. Select Setup, then Password to change the
password).
Figure 3-6: Customization Screen.
Customization active
Nominal Voltage
480V
10%
10%
60 Hz
5%
Overvoltage threshold
Undervoltage threshold
Nominal frequency
Over-frequency threshold
E
S
C
Under-frequency threshold 5%
Phase error tolerance S1/S2 15°
Retransfer
YES
Table 3-1: Customization Settings.
Parameter
Factory setting
Customization
Nominal Voltage (both sources)
Overvoltage threshold
As specified by customer
208,220,240,440,480,575,600V
+5% to +20% (1% steps)
-5% to –20% (1% steps)
50 or 60 Hz
+10%
Undervoltage threshold
-10%
Nominal Frequency (both sources)
Over-frequency threshold
60 Hz
+5%
+1 to +10% (0.5% steps)
-1 to -10% (0.5% steps)
1° to 45° (1° steps)
Manual (NO)
Under-frequency threshold
Phase error tolerance (between sources)
-5%
15°
Retransfer
Automatic (YES)
(return to preferred source after transfer)
For additional customization of your Epsilon STS
™
(e.g. to change the retransfer time delay from the factory setting
of 10 seconds), we recommend that you contact our MGE Customer Support (reference page QS-8)
.
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Operation
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3 —16
86-504004-00 B02
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MGE Warranty & Proprietary Rights Statement for Three Phase Products
(Applicable within the United States, Canada and Mexico)
MGE Standard Three Phase Warranty
MGE UPS SYSTEMS, INC. (“MGE”) warrants three phase products it manufactures to be free from defects in materials
and workmanship for a period of three hundred sixty five (365) days counting from the date of purchase by or for the first
end user (“Purchaser”), or, if applicable, the date of MGE’s completion of initial startup of the subject product, provided
however said warranty shall not exceed eighteen (18) months from the date of delivery of the subject product to
Purchaser (the “Warranty Period”). MGE’s liability hereunder is limited to replacing or repairing at MGE’s factory or on
the job site, at MGE’s option, any part or parts that are defective and reported to MGE during the Warranty Period. MGE
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 MGE for repair or replacement must be sent freight prepaid to
its factory. Purchaser must obtain MGE’s Return Goods Authorization (“RGA”) prior to returning items. The conditions
stated herein must be met for MGE’s warranty to be valid. MGE will not be liable for any damage done by unauthorized
repair work, unauthorized replacement parts, from any misapplication of the subject product, for damage due to accident,
abuse, or act of God (such as earthquake, flood, inclement weather, rain or fire), or relating to Purchaser’s failure to follow
proper environmental conditions for the product.
In no event shall MGE be liable for loss, damage, or expense directly or indirectly arising from the use of or any defects
in the subject product, or from any other cause, except as expressly stated in this warranty. EXCEPT AS EXPRESSLY
STATED IN THIS WARRANTY, MGE UPS SYSTEMS, INC. MAKES NO WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING ANY WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE OR
NON-INFRINGEMENT. MGE is not liable for and Purchaser waives any right of action it has or may have against MGE
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 or the use, operation or
maintenance of the subject product. The warranty stated herein includes parts and labor; however, MGE will not be liable
for any labor subcontracted or performed by Purchaser for preparation of the warranted item for return to MGE’s factory
or for preparation work for field repair or replacement, and MGE will not be responsible to pay any invoice therefore.
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 authorized officer of MGE UPS SYSTEMS, INC. This warranty shall extend to the Purchaser but to no one
else. Accessories supplied by MGE, but manufactured by others, carry any warranty the manufacturers have made to
MGE, and which can be passed on to Purchaser.
MGE UPS SYSTEMS, INC. makes no warranty with respect to whether the products sold hereunder infringe any patent,
U.S. or foreign, and Purchaser represents that any specially ordered products do not infringe any patent. Purchaser
agrees to indemnify and hold MGE UPS SYSTEMS, INC. harmless from any liability by virtue of any patent claims where
Purchaser has ordered a product conforming to Purchaser’s specifications, or conforming to Purchaser’s specific design.
Purchaser has not relied and shall not rely on any oral representation regarding any products sold hereunder and any
oral representation shall not bind MGE UPS SYSTEMS, INC. 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 other damages except as expressly stated herein.
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 intellectual property rights, including exclusive rights of use
and/or manufacture and/or sale. Possession of this information does not convey any permission to reproduce, print,
manufacture or have made the article or articles shown herein. Such permission may be granted only by specific
written authorization signed by an authorized 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.
For Three Phase Warranty outside of the United States, Canada and Mexico, refer to Three Phase International
Warranty.
January 2005 Rev C00
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Warranty and Product Registration
Thank you for choosing MGE UPS SYSTEMS, INC. for your power protection, distribution, and quality
requirements. We are pleased to have you join our increasing family of users.
In order to maximize the value you receive from this product, and to ensure that you are kept informed of
product or software updates, we recommend that you take a few minutes to register your new purchase.
You may register online at the URL noted below. Should you not have Internet access, you may mail or fax
this form back (attn: Warranty Registration) as indicated at the bottom of the page.
Please be prepared with the following information to register and validate your UPS warranty, keep
informed on software and product updates, and register your extension "Warranty+" if purchased with the
UPS.
User Information
Last name
First name
Company name
Address
Zip code
City
State/Province
Country
Tel
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
________________________________________
Fax *
Email*
Product information
Model
Serial Number
________________________________________
________________________________________
Date of purchase ________________________________________
Warranty Extension (Warranty+)
I have purchased a warranty extension (Warranty+)
Reference: _____________________ Contract Number: _________________
Thank you from all of us at MGE.
MGE UPS SYSTEMS, Inc., 1660 Scenic Avenue, Costa Mesa, CA 92626, USA
Tel: 714-557-1636
Fax: 714-557-9788
41-000154-53 Rev B00 9/2003
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MGE Customer Care Center - Three Phase Products
Technical Support and Product Services
Technical questions? If you encounter a problem while following the instructions in this manual, or have
?
questions about the operation, repair, or servicing of your equipment, please direct calls to MGE UPS
SYSTEMS, INC. Customer Care Center or visit our web site www.mgeups.com for complete service information.
To insure that your questions are correctly answered, please obtain the part number, assembly number, and serial
number of the unit and include them in any discussions or correspondence.
Part Number:
_____________________________________________________________________
Assembly Number: _____________________________________________________________________
Serial number:
_____________________________________________________________________
Who To Contact
Technical Support:
1-800-523-0142 (during business hours)
Customer Care Center:
1-800-438-7373 (Hours: 24/7)
Customer FAQ
or International calls:
1-714-557-1636
Commitment: MGE UPS SYSTEMS, INC. is committed to providing easy to access factory trained experts that will
provide responses to any questions that you might have.
Scheduling Field Service Engineer Support
Scheduling of the MGE Field Service Engineers typically should be done 7 to 10 days before they are
required on-site. If the startup of the UPS is critical to maintaining your schedule, please call the MGE
toll free telephone number at 1-800-438-7373, to insure a safe installation and startup that will maintain
the MGE warranty and insure smooth performance
Return Policy for Repair of Three Phase Products (RGA)
Should you require factory service for your equipment, contact MGE Customer Care Center and obtain a Return Goods
Authorization (RGA) prior to shipping your unit. Never ship equipment to MGE without first obtaining an RGA number.
Date:
______________________________________________________
RGA Number: ______________________________________________________
Contact Name: ______________________________________________________
Rev A00 5/2005
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W—4
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Glossary
Term used
Definition / Meaning
@
/
At.
And/or.
+/-
Plus or Minus.
≤
Equal to or less than.
Number.
#
°C
Degree Celsius.
°F
Degree Fahrenheit.
Ø
Phase angle.
Ω
Ohm; unit of resistance.
Trade Mark.
®
2nd
Second.
AC or ac
Ambient Temp.
Ambient noise
ANSI
Alternating current, also implies root-mean-square (rms).
Temperature of surrounding air.
Acoustical noise of surrounding environment.
American National Standard Institute.
American Wire Gauge.
AWG
Breaker
BTU or Btu
Electrical circuit interrupter.
British thermal unit. Defined as the amount of heat required to raise the tempera-
ture of one pound of water by 1°F.
BYPASS
See “Static Transfer switch”.
BYPASS mode
See “off-line mode”.
Carrier
C
The company or individual responsible for delivering goods from one location to another.
Common.
CB
Circuit breaker.
cm
Centimeter.
dB
Decibels.
DC
Direct current.
Conduit
A flexible or rigid tube enclosing electrical conductors.
C.S.S.
Customer Support Service.
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Glossary
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Epilson STS
Current rating
dBA
The maximum current that a conductor or equipment can carry reliably without damage.
Decibel Adjusted.
dBrnC
Decibel above reference noise.
DC or dc
Direct current, or voltage.
Digital Meter
Earth ground
Electrician
The LCD display on the front panel of inverter system.
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.
FET
Field effect transistor.
Frequency.
Freq.
Frequency slew rate
The change in frequency per unit of time. Given in term of Hz per second (Hz/sec.).
Ground (safety).
GND
Hz
Hertz, frequency measurement unit, 1Hz is one cycle per second.
See “on-line” mode.
Inverter mode
I
Current.
IEC
International Electrotechnical Commission.
IEEE
Institute of Electrical and Electronic Engineers.
The input circuit from the building power panel to the equipment.
An electrical circuit that generates an AC voltage source from a DC voltage source.
Input branch circuit
Inverter
IGBT
kVA
Insulated gate bipolar transistors
KiloVolt-Ampere; is equal to 1000 Volt-Ampere.
L
Line.
LCD
Liquid-Crystal Display unit.
Light Emitting Diode.
Main AC input source.
Bypass AC input source.
Milliampere.
LED
Mains or Mains 1
Mains 2
mA
MAX.
Maximum.
MCM
Thousand circular mil; standard wire sizes for multiple stranded conductors over 4/0 AWG in
diameter. M is from Roman numerical system indicating 1000.
Module
N
Refers to individual power inverter module.
Neutral.
NC
Normally close.
NO
Normally open.
NEC
National Electrical Code.
G — 2
Glossary
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NFPA
National Fire Protection Association.
Part number.
NO. or No.
On-line mode
Off-line mode
Inverter output power is the primary energy source to load.
Inverter output is off, and the load connected at the inverter output receives power
from utility line via a static transfer switch or maintenance bypass relay.
OSHA
Occupational Safety and Health Agency.
PCA
PCB
PWM
SCR
Printed circuit assembly.
Printed circuit board.
Pulse Width Modulation.
Silicon controlled rectifier.
Shipping damage
SPDT
Any damage done to an article while it is in transit.
Single Pole Double Throw.
Static Transfer
An solid state switching mechanism electronically controlled to pass AC power direct-
ly from the utility to an output load.
Technician
Refers to an electronic technician qualified to maintain and repair electronic equip-
ment. Not necessarily qualified to install electrical wiring.
Test connector
DB-9 type connector on the LCD panel allowing MGE UPS SYSTEMS Customer
Support Service technician to access programmable and diagnostic features of the
system.
V
Volts
VA
VA
Volt amperes
Volt-amps, unit for apparent power measurement, equal V x I.
VAC or Vac
VDC or Vdc
Voltage of AC type.
Voltage of DC type.
ve
Battery voltage.
By way of.
Via
86-504004-00 B03
Glossary
G — 3
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TM
Epilson STS
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G — 4
86-504004-00 B03
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Reorder Form
1660 Scenic Avenue
Costa Mesa, CA 92626
Use this form to report any errors, omissions, or other problems you have experienced, or to order additional
hardcopies of this document. A free copy of this document may be downloaded from the proprietary MGE Rep Web site.
Please contact your MGE UPS SYSTEMS, INC. Representative for assistance.
NAME _____________________________________________________________________________________
COMPANY ___________________________________________________________________________________
STREET ADDRESS ____________________________________________________________________________
CITY ________________________________________ STATE __________________ ZIP ___________________
I would like to order______ (quantity @ $75.00 each) additional copies of the:
TM
EPSILON STS
Installation and User Manual
86-504004-00 B02
I would like to report the following problems with this document:
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w w w. m g e u p s . c o m
Contact MGE
United States
MGE UPS SYSTEMS
1660 Scenic Ave.
Costa Mesa, CA 92626
Tel: (714) 557-1636
(800) 523-0142
Fax: (714) 557-9788
email: [email protected]
www: mgeups.com
Canada
MGE UPS SYSTEMS
#9, 2789 Thamesgate Drive
Mississauga, ON L4T 4E8
Tel: (905) 672-0990
(877) 672-0990
Fax: (905) 672-7667
email: [email protected]
www: mgeups.com
Latin America and
Other International
MGE UPS SYSTEMS
1660 Scenic Ave.
Costa Mesa, CA 92626
Tel: (714) 513-7831
(800) 523-0142 ext. 7831
Fax: (714) 434-0199
email: [email protected]
www: mgeups.com
1660 Scenic Avenue, Costa Mesa, California 92626 • (714) 557-1636
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