Toshiba Vacuum Cleaner H6A HLS User Manual

Document: GF07Z313  
INSTALLATION & OPERATION MANUAL  
HV6CS Vacuum Circuit Breakers – Drawout Type  
7.2kV Voltage Class  
APPLICABLE MODEL NUMBER:  
(Motor Operation Type)  
HV6CS-MLD  
(Drawout Cell)  
H6A-HLS  
Issued: December, 2012  
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Important Notice  
The instructions contained in this manual are not intended to cover all details or variations in  
equipment types nor may it provide for every possible contingency concerning the installation,  
operations, or maintenance of this equipment. Should additional information be required,  
contact your Toshiba Customer Support Center.  
The contents of this manual shall not become a part of or modify any prior or existing  
agreement, commitment, or relationship. The sales contract contains the entire obligation of  
Toshiba International Corporation. The warranty contained in the contract between the parties  
is the sole warranty of Toshiba International Corporation and any statements contained herein  
do not create new warranties or modify the existing warranty.  
Any electrical or mechanical modifications to this equipment without the prior written  
consent of Toshiba International Corporation may void all warranties or other safety  
certifications. Unauthorized modifications may also result in safety hazard or equipment  
damage.  
Misuse of this equipment could result in injury and equipment damage. In no event will  
Toshiba International Corporation be responsible or liable for direct, indirect, special, or  
consequential damage or injury that may result from the misuse of this equipment.  
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About This Manual  
Every effort has been made to provide accurate and concise information to you, our customer.  
At Toshiba International Corporation we are continuously striving for better ways to meet the  
constantly changing needs of our customers. E-mail your comments, questions, or concerns  
about this publication to [email protected].  
Purpose and Scope of Manual  
This manual provides information on how to safely install, operate, maintain, and dispose of  
your HV6CS breaker. The information provided in this manual is applicable to the HV6CS  
breaker only.  
This manual provides information on the various features and functions of this powerful device,  
including:  
• Installation  
• Operation  
• Mechanical and electrical specifications.  
Included is a section on general safety instructions that describe the warning labels and  
symbols that are used on the device and throughout the manual. Read the manual completely  
before installing, operating, performing maintenance, or disposing of this equipment.  
This manual and the accompanying drawings should be considered a permanent part of the  
equipment and should be readily available for reference and review. Dimensions shown in the  
manual are in imperial units and/or the metric equivalent. Connection drawings within this  
document convey the typical topology of the HV6CS breaker.  
Because of our commitment to continuous improvement, Toshiba International Corporation  
reserves the right, without prior notice, to update information, make product changes, or to  
discontinue any product or service identified in this publication.  
Toshiba International Corporation (TIC) shall not be liable for direct, indirect, special, or  
consequential damages resulting from the use of the information contained within this  
manual.  
This manual is copyrighted. No part of this manual may be photocopied or reproduced in any  
form without the prior written consent of Toshiba International Corporation.  
© Copyright 2012 Toshiba International Corporation.  
TOSHIBA® is a registered trademark of Toshiba Corporation. All other product or trade  
references appearing in this manual are registered trademarks of their respective owners.  
All rights reserved.  
Printed in the U.S.A.  
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Contacting TIC’s Customer Support  
Center  
Toshiba International Corporation’s Customer Support Center can be contacted to obtain help  
in resolving any Adjustable Speed Drive system problem that you may experience or to provide  
application information.  
The Support Center is open from 8 a.m. to 5 p.m. (CST), Monday through Friday. The Center’s  
toll free number is US (800) 231-1412/Fax (713) 937-9349 CAN (800) 872-2192 MEX 01 (800)  
527-1204.  
For after-hours support follow the directions of the outgoing message when calling.  
You may also contact Toshiba International Corporation by writing to:  
Toshiba International Corporation  
13131 West Little York Road  
Houston, Texas 77041-9990  
For further information on Toshiba International Corporation’s products and services, please  
visit our website at www.toshiba.com/ind/.  
TOSHIBA INTERNATIONAL CORPORATION  
HV6CS Circuit Breaker  
Complete the following information and retain for your records.  
Model Number: _____________________________________________________________________  
Serial Number: _____________________________________________________________________  
Project Number (if applicable):_________________________________________________________  
Date of Installation: _________________________________________________________________  
Inspected By: _____________________________________________________________________  
Name of Application: ________________________________________________________________  
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Table of Contents  
General Safety Information ………………………………………………………………………. 1  
Safety Alert Symbol ……………………………………………………………………….. 1  
Signal Words ………………………………………………………………………………. 1  
Equipment Warning Labels ………………………………………………………………. 2  
Qualified Personnel ……………………………………………………………………….. 2  
Equipment Inspection …………………………………………………………………….. 3  
Handling and Storage …………………………………………………………………….. 3  
Disposal ……………………………………………………………………………………. 4  
During Use ………………………………………………………………………..……………….... 5  
1. Part Names …………………………………………………………………………………….…. 8  
2. From Receipt to Storage …………………………………………………………………….…. 9  
2.1 Receipt and Unpacking ………………………………………………………………………… 9  
2.2 Transport ……………………………………………………………………………………….... 10  
2.3 Storage …………………………………………………………………………………………… 12  
3. Installation ……………………………………………………………………….………………. 13  
3.1 Mounting the Drawout Cell .….………………………………..…………………………..……13  
3.2 Inserting the VCB into the Cell ………………………………………………….…………...…14  
4. Operation …….…………………………………………………………………………………... 16  
4.1 Manual Operation ……………………………………………………….……………………… 16  
4.2 Electrical Operation …………………………………………………….…………………….... 19  
4.3 Control Circuit .…….…………………………………………………….……………………... 20  
5. Main Circuit Connections and Disconnecting/Removing the VCB …………………… 22  
5.1 Connecting the Main Circuit ………..……….………………………………………………... 22  
6. Maintenance/Inspections …..………………………………………………………………… 23  
6.1 During Maintenance/Inspections …..……….………………………………………………... 24  
6.2 Types of Maintenance and Inspection Work ……..…………………..…………………….. 24  
6.3 Inspection Frequency …....……..……………………………………….………………….… 24  
6.4 Periodic Inspection Checkpoints ……………………………….………..……………….….. 25  
6.5 Vacuum Check …………………….…………………………….…………...…………….….. 26  
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General Safety Information  
DO NOT attempt to install, operate, maintain, or dispose of this equipment until you have read  
and understood all of the product safety information and directions that are contained in this  
manual.  
Safety Alert Symbol  
The Safety Alert Symbol is comprised of an equilateral triangle enclosing an exclamation  
mark. This indicates that a potential personal injury hazard exists.  
Signal Words  
Listed below are the signal words that are used throughout this manual followed by their  
descriptions and associated symbols. When the words DANGER, WARNING, and CAUTION  
are used in this manual, they will be followed by important safety information that must be  
carefully followed.  
The word DANGER proceeded by the safety alert symbol indicates that an imminently  
hazardous situation exists that, if not avoided or if instructions are not followed precisely, will  
also occur.  
DANGER  
The word WARNING preceded by the safety alert symbol indicates that a potentially  
hazardous situation exists that, if not avoided or if instructions are not followed precisely,  
could result in serious injury to personnel or loss of life.  
WARNING  
The word CAUTION proceeded by the safety alert symbol indicates that a potentially  
hazardous situation exists that, if not avoided or if instructions are not followed precisely, may  
result in minor or moderate injury.  
CAUTION  
The word NOTE provides helpful information.  
NOTE  
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Equipment Warning Labels  
DO NOT attempt to install, operate, perform maintenance, or dispose of this equipment until  
you have read and understood all of the product labels and user directions that are contained  
in this manual.  
Warning labels that are attached to the equipment will include the exclamation mark within a  
triangle.  
DO NOT remove or cover any of these labels. If the labels are damaged or if additional labels  
are required, contact the Toshiba Customer Support Center.  
Labels attached to the equipment are there to provide useful information or to indicate an  
imminently hazardous situation that may result in serious injury, severe property and  
equipment damage, or loss of life if safe procedures or methods are not followed as outlined  
in this manual.  
Qualified Personnel  
Installation, operation, and maintenance shall be performed by Qualified Personnel ONLY.  
A Qualified Person is one that has the skills and knowledge relating to the construction,  
installation, operation, and maintenance of the electrical equipment and has received safety  
training on the hazards involved (Refer to the latest edition of NFPA 70E for additional safety  
requirements).  
Qualified Personnel shall:  
• Have carefully read the entire manual.  
• Be familiar with the construction and function of the ASD, the equipment being driven, and  
the hazards involved.  
• Be able to recognize and properly address hazards associated with the application of  
motor-driven equipment.  
• Be trained and authorized to safely energize, de-energize, ground, lock-out/tag-out circuits  
and equipment, and clear faults in accordance with established safety practices.  
• Be trained in the proper care and use of protective equipment such as safety shoes, rubber  
gloves, hard hats, safety glasses, face shields, flash clothing, etc., in accordance with  
established safety practices.  
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Equipment Inspection  
• Upon receipt of the equipment, inspect the packaging and equipment for shipping damage.  
• Carefully unpack the equipment and check for parts that may have been damaged during  
shipping, missing parts, or concealed damage. If any discrepancies are discovered, it should  
be noted with the carrier prior to accepting the shipment, if possible. File a claim with the  
carrier if necessary and immediately notify your Toshiba Customer Support Center.  
DO NOT install the ASD if it is damaged or if it is missing any component(s).  
• Ensure that the rated capacity and the model number specified on the nameplate conform to  
the order specifications.  
• Modification of this equipment is dangerous and is to be performed by factory trained  
personnel ONLY. When modifications are required contact your Toshiba Customer Support  
Center.  
• Inspections may be required after moving the equipment.  
• Contact your Toshiba Customer Support Center to report discrepancies or for assistance if  
required.  
Handling and Storage  
• Use proper lifting techniques when moving the breaker; including properly sizing up the load,  
getting assistance, and using a forklift if required.  
• Store in a well-ventilated location and preferably in the original packaging if the equipment  
will not be used upon receipt.  
• Store in a cool, clean, and dry location. Avoid storage locations with extreme temperatures,  
rapid temperature changes, high humidity, moisture, dust, corrosive gases, or metal particles.  
• The storage temperature range of the breaker is 23° to 104° F (-5° to 40° C).  
DO NOT store the unit in places that are exposed to outside weather conditions (e.g. wind,  
rain, snow, etc.).  
• Store in an upright position.  
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Operating the VCB  
Failure to take the opportunity to discover abnormalities can result in injuries and  
equipment damage. Always check to make sure that the ON and OFF indicators are  
correct before operating the equipment.  
To avoid damaging the equipment, do not close the circuit when the unit switching  
indicator is ON.  
Connecting and disconnecting the main circuit  
To avoid injury and damage to the equipment, do not remove the holding pin unless you  
are moving the VCB outside the panel.  
To prevent electric shock or other injury, follow the instructions given in the instruction  
manual when moving the equipment in or out of the panel.  
Disposal  
Never dispose of electrical components via incineration. Contact your state environmental agency for  
details on disposal of electrical components and packaging in your area.  
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During Use  
Installation location  
To prevent damage to the VCB or performance degradation, do not store or install it in the  
following locations:  
* Places whose ambient temperature is outside the range of -5C to 40C (23F to  
104F). This may result in damage or performance degradation.  
* Places exceeding 1000 m (3300 ft) elevation.  
This may result in damage or performance degradation.  
* Places where excessive dust is produced.  
This may result in damage or performance degradation.  
* Places where corrosive gases are produced.  
This may result in fire, damage or performance degradation.  
* Places with very high or very low humidity.  
This may result in damage or performance degradation.  
* Places subject to extreme variations in temperature.  
This may cause condensation to form and result in damage or performance  
degradation.  
* Places subject to vibrations.  
This may result in damage or performance degradation.  
* Inclined locations.  
This may result in damage or performance degradation.  
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Special environmental conditions  
When using the VCB in special environments, check the points in Table 1 below.  
Table 1 Points to Check When Using the Circuit Breaker in Special Environments  
Special  
Practical example  
Check points  
environmental  
condition  
Contamination  
* Large amounts of dust.  
* Reduce the size of the ventilation duct  
* Make sure the wind does not blow  
* Salt corrosion (locations near the  
seashore or where winds containing directly at the location where the  
salts blow)  
ventilation duct is installed  
* Install a filter  
High humidity  
* Places subject to frequent and/or  
strong rainstorms or snowstorms  
* Use a cubicle construction that will  
prevent condensation from forming  
* When there is a cooling tower or  
other large water source nearby  
* Use a cubicle construction that will  
prevent the wind from blowing directly  
into the cubicle  
* Where there is condensation (which  
forms when the humidity in the  
cubicle drops dramatically)  
* Install a space heater  
Corrosive gases  
* When corrosive gases are produced * Use a cubicle construction that  
at plants handling raw materials, at  
water treatment plants, in hot  
springs regions etc. (hydrogen  
chloride, sulfurous acid, nitrogen  
oxide, ammonia, chlorine, ozone  
etc. or other gases)  
enables the cubicle to be blocked off  
from the outside air to the greatest  
extent possible  
* Install a filter  
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Applicable standards pertaining to switching surges  
Consult Table 2 for the standards applicable to VCB switching surges.  
Table 2 Applicable Standards Pertaining to Switching Surges  
Circuit  
breaker  
type  
Load type  
Rotating  
Dry type  
transformer  
(insulation  
resistance  
below  
Oil-immersed  
transformer  
(insulation  
resistance  
class A)  
When there is  
electronic  
equipment on  
transformer  
low voltage  
side  
Phase advance  
capacitor *4, *5  
machine *1  
class A)  
Ordinary  
Protected by CR Protected by  
No special  
restrictions  
Protected by CR 6.6 kV circuit:  
suppressor *6  
surge  
suppressor *6  
No special  
suppressor  
restrictions  
up to 300 kVA  
Low surge  
type  
No special  
No special  
No special  
restrictions  
Protected by CR 6.6 kV circuit:  
restrictions *2  
restrictions *3  
suppressor *6  
No special  
restrictions  
up to 4000 kVA  
*1. Mainly induction motors, but also includes synchronizing generators for private generator  
equipment.  
*2. Use a CR suppressor for surge protection when inching at 55 kW (75HP) or below and on  
inductance regulators.  
*3. Use an arrester for surge protection on circuits that require cutting off of excitation rush current.  
*4. When the capacity of the group of capacitors exceeds 300 kVA, insert a series reactor (6%).  
*5. For high-frequencies included in the applicable circuit, use 135% or below of the fifth harmonic  
as established in the standards for phase advance capacitors (JIS C 4801).  
*6. Table 3 shows the models of applicable CR suppressor.  
Table 3 CR Suppressors  
Circuit voltage  
CR suppressor model  
NV60K304T1  
6.6 kV  
(three-phase)  
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1. Part Names  
SHAFT FOR MANUAL  
CHARGING HANDLE  
DRAWOUT  
CELL  
ON-OFF  
INDICATOR  
SPRING  
INDICATOR  
INTERLOCK  
LEVER  
CLOSE  
LEVER  
TRIP  
LEVER  
VCB  
COUNTER  
SECONDARY  
DISCONNECTS  
DRAWOUT  
HANDLES  
Figure 1 Drawout Type Circuit Breaker  
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2. From Receipt to Storage  
2.1 Receipt and Unpacking  
Each VCB unit is carefully tested and inspected prior to shipment, so it can be used as soon as it  
has been unpacked. However, just in case something should be amiss, you should check the  
following:  
(1) When the box is delivered, check to make sure it is not damaged or warped.  
(2) Remove the unit from the box carefully to avoid damaging it.  
To prevent injury or damage to the equipment, make sure the unit is  
standing straight up. NEVER lay it on its side or place it upside-down.  
CAUTION  
(3) Make sure the accessories (see Tables 4 & 5) are present and no parts are missing or  
damaged.  
To prevent electric shock or other injury, do not use the unit if it has  
been damaged.  
WARNING  
(4) Contact your dealer in the event of missing parts, damage, etc.  
Table 4 List of Accessories (VCB)  
Part  
Appearance  
Quantity  
B9 grease  
1
Handle (with mounting  
screw) shipped together  
with the  
1
VCB unit.  
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Table 5 List of Accessories (Drawout Cell)  
Appearance  
Part  
Quantity  
Control cable  
(2m)  
1*  
2.2 Transport  
Use the proper procedures when moving or transporting the unit.  
Failure to use the proper (authorized) methods may damage the  
unit or cause it to fall, resulting in injury.  
CAUTION  
2.2.1 Transporting U Type VCBs (main circuit terminals on top left and right)  
Cable  
Figure 2 Hoisting the Circuit Breaker  
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2.2.2 Drawout Cell  
When hoisting the drawout unit, attach cable (wire rope) to the holes on the left and right of  
the rear of the unit, as shown in Figure 3.  
Cable  
Figure 3 Lifting the Drawout Cell  
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2.3 Storage  
Use the following procedures if the VCB will not be operated for a long period of time after it  
has been installed, or if it must be stored for a long period of time prior to installation. Be sure  
to observe the precautions for storage and installation locations (see page 5).  
(1) When storing the unit, cover it with a dust cover.  
(2) Avoid locations subject to high humidity or exposed to direct sunlight.  
(3) Inspect the unit periodically and make sure there are no problems such as condensation,  
moisture absorption, rust, corrosion or insects inside the equipment. If such problems are  
discovered, inspect the equipment carefully and repair it before it is operated.  
To prevent electric shock or other injury, do not use the unit when a  
problem has been discovered during an inspection of that unit.  
WARNING  
To prevent injury or damage to the equipment, make sure the unit is  
standing straight up. NEVER lay it on its side or place it upside-down.  
CAUTION  
(4) When the equipment has been stored or has been idle for a long period of time, do not  
install or begin operating the unit immediately. Perform the procedures listed in sections  
7.3 and 7.4 and the withstand voltage test* for the control circuit to make sure there are no  
problems before installing or operating the unit.  
*The withstand voltage on control circuits  
The withstand voltage test for motor spring operation type circuit breaker shall be  
performed in charged condition.  
The power frequency withstand voltage on control circuits except charging motor is 2000V  
AC, since the withstand voltage for charging motor is 1500V AC.  
The motor circuit shall be disconnected before withstand voltage test on control circuits.  
(Example: The connector plug (white) on upper-center of control board should be  
disconnected (pull out) after removing the front cover of circuit breaker. This will make the  
motor circuit disconnect  
Note: The connector plug and front cover must be returned to proper position after  
withstand voltage test.  
CONNECTOR PLUG  
(WHITE)  
CONTROL  
BOARD (UNIT)  
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3. Installation  
Make sure the location satisfied the requirements listed under Storage and Installation  
Location (page 3) and check the dimensions using the diagrams in other catalogs or external  
view diagrams and panel cut diagram. Prior to installation, the maximum fault current capacity  
of the power system at the point of installation should be verified. This value must not exceed  
the symmetrical interrupting capability of the circuit breaker. See typical circuit breaker  
nameplate below.  
Do not exceed the ratings specified on the breaker nameplate or  
DANGER  
system accessories. Underrated equipment can fail during operation  
causing fire, explosion, severe injury, death, and property damage.  
Typical Circuit Breaker Nameplate  
3.1 Mounting the Drawout Cell  
3.1.1 Mounting in the panel  
To install the draw-out unit, perform the steps shown in Figures 4 and 5 in that order.  
Figure 5 Crimp the crimp-on terminal  
provided with the unit to the grounding wire  
Figure 4 Fasten the drawout cell to the panel with  
and use the hexagonal bolt (M8) to fasten it  
the 4 hexagonal bolts (M8). Tightening torque  
in place. The tightening torque should be  
should be 11.8 to 14.7 N-m (120 to 150 kgf-cm).  
11.8 to 14.7 N-m (120 to 150 kgf -cm).  
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Screw  
Tightening  
Screw  
Tightening torque  
nominal dia. torque  
Nominal dia.  
M8  
M4  
M5  
M6  
1.47 to 1.96 N-m  
11.8 to 14.7 N-m  
(15 to 20 kgf-cm)  
2.94 to 3.92 N-m  
(30 to 40 kgf-cm)  
4.90 to 6.37 N-m  
(50 to 65 kgf-cm)  
(120 to 150 kgf-cm)  
M10 24.5 to 30.9 N-m  
(250 to 315 kgf-cm)  
44.1 to 55.4 N-m  
M10  
M12  
(450 to 565 kgf-cm)  
Table 5 Tightening Torque  
3.2 Inserting the VCB into the Cell  
(Outside the cell disconnected position)  
Perform the steps shown in Figures 6 through 10 in that order.  
.
Figure 6 Open the B9 grease provided with the  
unit and apply it to the ends of the six contacts.  
Figure 7 Place the VCB on the lifter.  
Figure 8 Align the hole on the lifter with the  
lifter pin on the cubicle and remove the VCB  
holding pin on the draw-out unit side.  
Figure 9 Hold the handle with both  
hands and, with the interlock lever in  
the raised position, insert the VCB  
into the panel.  
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Location of VCB holding pin (with chain)  
Figure 10 Align the positioning arrow on the VCB  
with the disconnect position and release the  
interlock lever. Check to make sure the interlock  
lever has returned to its former position. Insert the  
VCB holding pin.  
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4. Operation  
Failure to take the opportunity to discover abnormalities can  
result in injuries and equipment damage. Always check to make  
sure that the ON and OFF indicators are correct before  
operating the equipment.  
CAUTION  
4.1 Manual Operation  
To avoid damaging the equipment, do not close the circuit when  
the unit switching indicator is ON.  
CAUTION  
4.1.1 Closing the Circuit  
Check to make sure that the switching status is set to OFF.  
4.1.1.1 For Motorized Spring-operated VCBs  
Attach the handle using the steps shown in Figures 11 and 12, in that order.  
The manual charging handle shall be applied for emergency case and maintenance  
purpose only, remove (not install) the handle at normal service condition.  
Figure 11 Attach the handle provided with  
the unit to the handle shaft. Check to make  
sure that the handle has been securely  
connected to the shaft (small screw M5).  
Figure 12 Using the small screw (M5)  
provided, fasten the handle in position.  
The tightening torque should be 2.94 to  
3.92 N-m (30 to 40 kgf-cm).  
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(1) When the spring is released -  
Perform the steps shown in Figures 13 and 14 in that order.  
CHARGING  
HANDLE  
CLOSED  
LEVER  
Figure 13 Turn the handle clockwise 3 to 5  
times and make sure that the spring status  
is taut.  
Figure 14 Press the closed lever (green) in  
the direction of the arrow to close the  
circuit. When the switching status will  
change to ON, the VCB is set in close  
state.  
(2) When the spring is taut -  
Perform the step shown in Figure 15.  
CLOSED  
LEVER  
Figure 15 Press the closed lever (green) in  
the direction of the arrow to close the  
circuit. When the switching status will  
change to ON, the VCB is set in close state.  
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4.1.2 Opening the Circuit  
This operation is the same for both motorized and manual spring-operated VCBs.  
TRIP  
LEVER  
Figure 16 Press the trip lever (red) in the  
direction of the arrow to open the circuit.  
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4.2 Electrical Operation  
Electrical operations are performed as shown in the flow diagram below.  
Circuit breaker OPEN  
Control power applied  
Motor begins operating  
Springs begin tightening  
Spring status changes to yellow  
Springs ChargedMotor stops  
CLOSE operation standby  
CLOSE signal given  
CLOSE coil energized  
Spring changes to white and switching  
status changes to ON  
Circuit breaker CLOSED  
Auxiliary relay closes  
Motor begins operating  
Spring begins tightening  
Anti-pumping circuit completed  
OPEN signal given  
Spring tautMotor stops  
Spring status changes to yellow  
OPEN/TRIP coil energized  
Circuit breaker OPEN  
Switching status changes to OFF  
Next CLOSE operation is NOT possible  
until the CLOSE signal is canceled.  
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4.3 Control Circuit  
4.3.1 Motorized Operation  
Figure 17 Control Circuit  
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4.3.2 Undervoltage Trip  
All HV6CS breakers are furnished with an undervoltage trip device. The Undervoltage trip device  
operates to trip the circuit breaker OFF unless 120VAC control power is present at the terminals of  
the UV (TC4) trip coil.  
When the circuit breakers are shipped, the Undervoltage trip device is defeated by a factory  
installed plug (Figure 18). If this plug is left in place, the circuit breaker will operate normally without  
power applied to the UV coil. Removing this plug (Figure 19) activates the undervoltage trip function.  
Figure 18 Plug Installed in UV Trip Device  
Figure 19 Remove Plug From UV Trip Device  
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5. Main Circuit Connections and  
Disconnecting/Removing the Circuit  
Breaker from the Cell  
5.1 Connecting the Main Circuit (disconnected position to connected  
position)  
Perform the steps shown in Figures 20 through 21 in that order.  
To avoid damaging the equipment, do not connect or disconnect the  
main circuit when the unit switching status is ON.  
To prevent electric shock or other injury, do not bend or modify the  
in/out interlock attached the unit.  
WARNING  
To avoid injury and damage to the equipment, do not remove the  
holding pin unless you are moving the VCB outside the panel.  
CAUTION  
To prevent electric shock or other injury, follow the instructions given in  
the instruction manual when moving the equipment in or out of the  
panel.  
Figure 20 Insert the control circuit  
connector into the port on the VCB.  
Figure 21 Grasp the handle with both hands  
and, with the interlock lever in the raised  
position, insert the VCB up to the  
connected position.  
* The interlock lever cannot be raised when  
the switching status of the VCB is set to  
ON. Perform the open circuit operation  
and set the switching status to OFF.  
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6. Maintenance/Inspections  
To prevent electric shock, turn off the power before starting  
maintenance and inspections.  
To prevent electric shock or other injury, check to make sure that  
the unit status indicators read OFF and DISCHARGED before  
beginning maintenance and inspection work.  
To prevent electric shock, do not touch charged parts.  
Keep fingers and other body parts, objects, etc. away from the unit  
mechanism, as you may become caught in the mechanism and  
injured.  
WARNING  
To prevent electric shock or other injury, do not attempt to modify  
the lock mechanism on the disconnecting switch mounted on the  
unit power side.  
Hazardous voltage can cause serious injury or death. Make sure  
maintenance and inspection work is performed only by authorized  
personnel.  
The VCB should be maintained and inspected periodically to maintain performance and  
ensure a long service life. Operating and environmental conditions will usually dictate the  
frequency of inspection required. NFPA Publication 70B "Electrical Equipment Maintenance"  
may be used as a guide for setting up the maintenance program.  
Contact with energized components can cause severe injury, death and  
DANGER  
property damage. Turn off and lock-out primary and control circuit power  
before servicing.  
Improper maintenance can cause severe injury, death and property damage.  
Only qualified and authorized persons are to install, operate or service this  
equipment.  
WARNING  
WARNING  
Grease is conductive. Do not allow grease or any other substances to  
contaminate insulating materials. Contaminated insulators can allow a short  
circuit or ground fault to occur.  
MAINTENANCE RECORD  
Keep a permanent record of all maintenance work. At a minimum, this record should include:  
1) Items inspected  
2) Reports of any testing  
3) Equipment condition  
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4) Corrective actions or adjustments  
5) Date of work  
6.1 During Maintenance/Inspections  
Before inspecting the electrical circuits, take the following measures to prevent electric shock:  
1) After opening circuit for the VCB, open the disconnect switch on the power source side to  
place the main circuit and control circuits of the VCB in no-voltage status.  
2) Lock the disconnect switch to prevent operation and label it with an "INSPECTION IN  
PROGRESS" tag.  
3) Using a voltage detector, check to make sure that the circuits are in no-voltage status and  
ground the necessary circuits.  
Discharge the residual charge from capacitors and cables before grounding. Space heaters,  
resistors and other units will remain hot even after they have been turned off. Install a  
protective cover temporarily, or wait until after the units have cooled to perform the inspection.  
To ensure safety, remove the ground line after the inspection is complete and return the  
equipment to its previous status.  
6.2 Types of Maintenance and Inspection Work  
Receiving inspection  
A visual inspection for damage, deformation, missing parts and switching status (manual)  
to make sure that the product is in the same status as when it was shipped.  
Patrol inspection  
An inspection performed during patrols to check for abnormal noise or odor and see if  
there is anything wrong with the equipment during operation.  
Periodic inspection  
The equipment is shut off and a check made of the operation of the mechanism to make  
sure there is nothing wrong. The lubrication status of sliding and rotating parts is also  
checked and the mechanism is lubricated if needed.  
Unscheduled inspection  
Inspections that are implemented as required.  
6.3 Inspection Frequency  
The inspection frequency and points to be inspected will differ depending on the status of use,  
frequency of switching, the size of the breaking current and other factors. In general,  
inspections should be implemented at the intervals shown in the table below.  
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Table 7 Inspection Frequency  
Inspection frequency  
Type of inspection  
Patrol Inspection  
Once every 6 months  
Periodic Inspection  
Normal  
Detailed  
Once every 1 to 3 years or every 3,000 operations  
Once every 6 years  
As needed  
Unscheduled Inspection  
6.4 Periodic Inspection Checkpoints  
Table 8 Periodic Inspection Checkpoints  
No. Location  
Item  
Inspection  
method  
Criteria  
Disposition  
Remarks  
1 Operating  
Loose bolts,  
Tighten using  
screwdriver or  
wrench.  
Make sure all  
Tighten if  
loose.  
See Table  
6 for  
mechanism nuts or screws  
bolts, nuts and  
screws are tight.  
tightening  
torque.  
Dust or foreign  
matter inside  
Visual  
Make sure there is Wipe with a dry  
inspection.  
no dust or foreign  
matter.  
cloth.  
Indicator  
operation  
Visual  
Make sure  
Check the  
inspection.  
switching status is cause and  
properly displayed. repair.  
Part warping  
Visual  
Make sure no  
parts are warped  
or missing.  
Check the  
inspection.  
cause and  
repair.  
Smooth action  
Manual  
operation.  
Visual  
Make sure action  
is smooth and  
shafts turn  
If action is not  
smooth, apply  
a small amount  
of lubricant.  
inspection  
or touch.  
See  
smoothly.  
Lubrication  
Manual  
Visual  
2
Main circuit Discoloration  
Make sure there is Check the  
due to heat from inspection.  
conducting parts  
no discoloration.  
cause and  
repair.  
Loose bolts,  
Tighten using  
a wrench.  
Make sure all  
Tighten if  
loose.  
See Table  
6 for  
nuts or screws  
bolts, nuts and  
screws are tight.  
tightening  
torque.  
Dust on surface Visual  
of interrupter inspection.  
Make sure there is Wipe with a  
no surface dust. clean dry cloth.  
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No. Location  
Item  
Inspection  
method  
Criteria  
Disposition  
Remarks  
If damaged,  
Toshiba.  
3
Insulator  
Dust, foreign  
matter or  
Visual  
Make sure there Wipe with a  
inspection.  
is no dust,  
clean dry cloth. contact  
damage  
foreign matter or  
breakage.  
4
Auxiliary  
switch  
Terminals  
loose or  
Visual  
Make sure  
Repair if  
See Table 6  
for  
inspection.  
terminals are not disconnected.  
disconnected  
Tighten using a loose or  
screwdriver. disconnected.  
Case/contacts Visual  
inspection  
Tighten if  
loose.  
tightening  
torque.  
Make sure there Replace if  
is no damage or damaged or  
Warping.  
Make sure circuit If circuit fails to  
warped.  
5
Control  
circuits  
Smooth  
Supply  
movement  
when  
electricity  
to operate the  
circuit.  
operates  
operate, check  
the cause and  
repair.  
smoothly.  
electricity is  
supplied  
Terminals  
loose or  
Visual  
Make sure  
Repair if  
See Table 6  
for  
inspection  
terminals are not disconnected.  
disconnected  
Tighten using a loose or  
screwdriver. disconnected.  
Tighten if  
tightening  
torques.  
loose.  
6
Insulation  
If the insulation  
resistance  
resistance  
measurement  
Measurement  
point  
Insulation  
Tester  
1000 V  
500 V  
between the  
main circuit  
terminals is  
low, wipe the  
vacuum valve  
and insulator  
surface with a  
clean dry cloth  
and repeat the  
test.  
resistance  
Main conductor to  
ground  
500M  
or greater  
2M  
Group of control  
circuits to ground  
Between main  
circuit  
or greater  
1000 V  
100M  
or greater  
terminals  
6.5 Vacuum Check  
A sufficient level of vacuum is necessary for proper performance of the vacuum interrupters. Although  
vacuum leaks are rare, the vacuum integrity should be checked periodically. The relationship between  
dielectric breakdown voltage of the contact gap and internal vacuum interrupter pressure has been found  
to be generally predictable. Therefore, vacuum interrupter integrity is checked by performing a high  
potential test across the open gap of the interrupter.  
TEST EQUIPMENT:  
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Toshiba offers a compact vacuum checker (Type CI35-1D, see Figure 22) which enables a quick and  
easy check on vacuum interrupter internal pressure. Alternatively, any commercially available AC high  
potential tester may be used which is capable of delivering at least 25 milliamperes at 22 kV for a period  
of one minute.  
Figure 22 Toshiba Portable Vacuum Checker  
PRECAUTIONS:  
Applying abnormally high voltage across a pair of contacts in vacuum may produce X-rays. The radiation  
may increase with the increase in voltage and/or decrease in contact spacing. X-radiation produced  
during this test with recommended voltage and normal contact spacing is extremely low and well below  
the maximum permitted by standards. As an additional safety measure, it is recommended that all  
personnel keep at least 1 meter (3.3 ft) away from the vacuum circuit breaker while this test is  
performed.  
Radiation exposure hazard. X-rays may cause illness or injury.  
Stay at least 1 meter (3.3 ft) away from the circuit breaker  
during the vacuum check test .  
WARNING  
WARNING  
Hazardous voltages are present during dielectric testing which  
can result in severe injury or death. Only qualified personnel  
should conduct this testing.  
See Figure 23 for sample withstand voltage test circuit.  
Figure 23 Sample Withstand Voltage Test Circuit  
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TEST PROCEDURE:  
1. The circuit breaker should be disconnected from the main circuit and be in the OFF position.  
2. Connect all the line side primary terminals together and to the output of the vacuum checker or AC  
hi-pot machine. Connect all the load side primary terminals together and to the ground terminal of  
the vacuum checker or AC hi-pot machine.  
3. Increase the voltage from zero to 22kV AC at a rate of approximately 2kV per second. Hold the  
voltage at this value for 1 minute and observe the current drawn by the interrupter.  
Note: If the ammeter fluctuates violently as the voltage increases to AC22 kV, repeat the  
voltage increase procedure two or three times. If the current still rises when the voltage is  
increased, the vacuum level may be insufficient;  
replace the vacuum interrupter.  
1 minute  
22kV AC  
(31kV DC)  
4. Decrease the voltage back to zero.  
CRITERIA:  
1. If a current flow above 5 milliamperes is observed or  
Voltage  
if breakdown occurs, one or more of the interrupters  
has insufficient vacuum and must be replaced.  
Exception: If the current exceeds 5 milliamperes the  
first time the voltage is brought up, reduce the  
Zero  
voltage to zero and increase it again. It may be  
necessary to repeat this procedure a few times.  
15 sec  
15 sec  
Time  
Figure 24 Application of Test  
Voltage for Vacuum Check  
2. If the breaker fails to meet criteria 1, then repeat the  
test on each pole separately to identify the damaged  
interrupter or interrupters.  
3. If the voltage can be held for 1 minute and the current flow does not exceed 5 milliamperes, the  
interrupter has a sufficient vacuum level.  
After the test is complete, discharge any residual static charge from the primary terminals of the circuit  
breaker.  
If a vacuum checker or AC hi-pot tester is not available, a DC hi potential test may be conducted. If a DC  
test is conducted, the test voltage must be increased to 31kV DC. The test duration for DC tests and the  
criteria for acceptance remain the same as for AC tests.  
Do not use DC hi-pot testers which employ unfiltered half-wave rectifiers.  
The peak voltages produced by these testers may exceed the recommended  
value of 31kV. This can result in the production of harmful X-rays  
WARNING  
and may invalidate the test results.  
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Figure 25 shows the relationship between the dielectric breakdown characteristics and the withstand  
voltage between electrodes (for each vacuum interrupter) in the withstand voltage test.  
Figure 25 Dielectric Breakdown Characteristics  
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TOSHIBA  
TOSHIBA INTERNATIONAL CORPORATION  
INDUSTRIAL DIVISION  
13131 W. Little York Road, Houston, TX 77041 U.S.A.  
Tel: +713- 466-0277 US 1-800- 231-1412  
Fax: (713) 466-8773  
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