Toshiba HV6AS Vacuum Circuit Breakers Installation Manual · inspecting, handling, lifting and...

Document: GF07Z301 Rev. 1

INSTRUCTION MANUAL

INSTALLATION - OPERATION - MAINTENANCE

HV6AS Vacuum Circuit Breakers – Fixed Type4.8 & 7.2kV Voltage Classes

APPLICABLE MODEL NUMBERS:

(Manual Operation Types)

HV6AS-UHV6AS-L

(Motor Operation Types)

HV6AS-MUHV6AS-ML

Issued: 2/2000Supercedes First Issue Dated 2/99.

Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: [email protected]

INSTRUCTION MANUALFor the Installation, Operation and Maintenance of

HV6AS Vacuum Circuit Breakers – Fixed Type4.8 & 7.2kV Voltage Classes

Never attempt to install, operate, maintain or dispose of this equipment untilyou have first read and understood all of the relevent product warnings anduser directions that are contained in this Instruction Manual.

To contact Toshiba, address all correspondence to:

Field Service DepartmentToshiba International Corporation13131 West Little York RoadHouston, Texas 77041 USA

or call:

(713) 466-0277(800) 231-1412(800) 527-1204 (Canada)

Fax: (713) 466-8773

Please complete the following information for your records and retain with this manual:

Model: ___________________________________

Serial Number:_____________________________

Date of Installation: _________________________

Inspected by: ______________________________

Reference Number: _________________________

© TOSHIBA INTERNATIONAL CORPORATION, 2000

WARNING


SAFETY Page 1

IMPORTANT MESSAGES

Read this manual and follow its instructions. Signal words such asDANGER, WARNING and CAUTION will be followed by important safetyinformation that must be carefully reviewed.

Indicates a situation which will result in death, serious injury, and severeproperty damage if you do not follow instructions.

Means that you might be seriously injured or killed if you do not followinstructions. Severe property damage might also occur.

Means that you might be injured if you do not follow instructions. Equipmentdamage might also occur.

NOTE Gives you helpful information

READ SAFETY SIGNS

To avoid injury, you must read and follow all safety signs.

Keep the safety signs visible and in good shape. Never remove or cover any safetysigns.

DANGER

WARNING

CAUTION


SAFETY

QUALIFIED OPERATORS ONLY

Only qualified persons are to install, operate, or service this equipment according to allapplicable codes and established safety practices.

A qualified person must:

1) Carefully read the entire instruction manual.2) Be skilled in the installation, construction or operation of the equipment and

aware of the hazards involved.3) Be trained and authorized to safely energize, deenergize, clear, ground,

lockout and tag circuits in accordance with established safety practices.4) Be trained and authorized to perform the service, maintenance or repair of

this equipment.5) Be trained in the proper care and use of protective equipment such as rubber

gloves, hard hat, safety glasses, face shield, flash clothing, etc. inaccordance with established practices.

6) Be trained in rendering first aid.

SAFETY CODES

Toshiba HV6AS vacuum circuit breakers are designed and built in accordance with JISC 4603-1990 and JEC-2300-1985. Installations must comply with all applicable stateand local codes, adhere to all applicable National Electric Code (NFPA 70) standardsand instructions provided in this manual.


SAFETY Page 3

HAZARDOUS VOLTAGE will cause severe injury, death, fire, explosion andproperty damage.

• Turn off and lock out Primary and Control Circuit Power before servicing.

• Keep all panels and covers securely in place.

• Never Defeat, Modify, or Bypass any Safety Interlocks

• Qualified Operators only

SAFETY....................................................................................................................................................1

DANGER


TABLE OF CONTENTS

INTRODUCTION ......................................................................................................................................6

GENERAL DESCRIPTION .......................................................................................................................7

Components..................................................................................................................................7Indicators and Controls .................................................................................................................8

RECEIVING, INSPECTION AND HANDLING..........................................................................................9

Receiving and Unpacking .............................................................................................................9Acceptance Inspection..................................................................................................................9Handling and Moving ..................................................................................................................10

INSTALLATION......................................................................................................................................11

Rating Verification.......................................................................................................................11Mounting the Circuit Breaker to a Panel .....................................................................................12Mounting Directly to a Shelf ........................................................................................................14Main Circuit Cable Connections..................................................................................................15Ground Connections ...................................................................................................................16Control Circuit Connections ........................................................................................................17Additional Auxiliary Switch ..........................................................................................................17

PRE-ENERGIZATION CHECK ..............................................................................................................18

General .......................................................................................................................................18Electrical Checks ........................................................................................................................18

OPERATION...........................................................................................................................................19

Manual Operation........................................................................................................................19Electrical Operation.....................................................................................................................19Undervoltage Trip........................................................................................................................24

MAINTENANCE .....................................................................................................................................25

Maintenance Program.................................................................................................................25Maintenance Record...................................................................................................................25Servicing Equipment ...................................................................................................................25Inspection and Maintenance Types ............................................................................................26Table 1. Tightening Torques ......................................................................................................26Table 2. Check Points for Periodic Inspection ...........................................................................27Vacuum Check............................................................................................................................29

DISPOSAL..............................................................................................................................................31

STORAGE ..............................................................................................................................................32

Storage........................................................................................................................................32


TABLE OF CONTENTS Page 5 Inspection During Storage...........................................................................................................32

SPECIFICATIONS..................................................................................................................................33

Table 3. Ratings – Manual Operation HV6AS-U and HV6AS-L Types ......................................33Table 4. Ratings – Motor Operation HV6AS-MU and HV6AS-MU Types ..................................33

WARRANTY AND LIMITATION OF LIABILITY.....................................................................................34


INTRODUCTION

It is the intent of this manual to provide a guide for safely installing, operating and maintaining Toshibavacuum circuit breakers. This manual consists of a section of general safety instructions and is markedthroughout with warning symbols. Read this manual thoroughly before installation, operation andmaintenance of this equipment.

This manual and all accompanying drawings should be considered a permanent part of the equipment.They should be readily available for review and reference at all times. This manual is not intended tocover all details, combinations, or variations of the equipment. Always refer to drawings accompanyingthe equipment for additional details.

All safety warnings must be followed to ensure personal safety. General safety instructions arefound on pages 1 through 3. Read and save these instructions for future reference.

Follow all precautions to attain proper equipment performance and longevity.

Dimensions shown in the manual are in metric and/or their English equivalent.

This manual is divided into major sections of interest, as follows:

GENERAL DESCRIPTION – Provides a description of the equipment, information on majorcomponents and how they function, plus rating information.

RECEIVING, INSPECTION AND HANDLING – Describes procedures for receiving, unpacking,inspecting, handling, lifting and moving the circuit breaker.

INSTALLATION – Provides information on installing the circuit breaker in the switchgear cell along withbreaker racking procedures.

PRE-ENERGIZATION CHECK – Provides a checklist for preparing the equipment for energization.

OPERATION – Provides information on manual and electrical operation of the circuit breaker, circuitdiagrams, operating sequence description and operation of circuit breaker optional accessories.

MAINTENANCE – Lists the basic maintenance procedures for this equipment necessary for safe andreliable operation.

DISPOSAL – Lists procedures for the safe disposal of the equipment when the service life has expired.

STORAGE – Provides guidelines for storing new equipment for an extended period of time.

SPECIFICATIONS – Covers ratings and other specifications of the circuit breaker.

WARRANTY AND LIMITATION OF LIABILITY – Details Toshiba International Corporation’s standardwarranty terms.


GENERAL DESCRIPTION Page 7

The Toshiba HV6AS vacuum circuit breakersdescribed in this manual are suitable for use onsystems of 4.8kV and 7.2kV voltage classeswhich require interrupting ratings of 16kA and14kA respectively and a continuous currentrating of 630A. The circuit breakers are intendedfor use in limited applications requiring smallphysical size and low maintenance.

These breakers are designed for fixed panelmounting and are available with upper maincircuit terminals (U, MU types) or rear terminals(L, ML types).

The breakers are available as both manual andmotor-operated types. Motor-operated breakersuse a motor to charge the closing springs and toclose the breaker upon command. Both typescan be tripped electrically and also includeundervoltage release.

Arc interruption is accomplished inside sealedvacuum interrupters mounted on track-resistantinsulators. Vacuum interrupters use low-surgecontact materials which exhibit low currentchopping levels reducing switching overvoltages.

Fig. 1 and Fig. 2 illustrate and identify the majorcomponents of the circuit breakers.

COMPONENTS LEGEND:

1) Manual closing handle2) Manual trip lever3) On-Off indicator4) Spring charge indicator (MU and ML only)5) Operations counter6) Secondary control circuit terminal block7) Main circuit terminals8) Auxiliary switch9) Grounding terminal

Fig. 1 U and MU Type Circuit Breaker (UpperMain Circuit Terminals)

FM

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ig. 2 L and ML Type Circuit Breaker (Rearain Circuit Terminals)

Email: [email protected]

GENERAL DESCRIPTION

SAFETY DEVICES

Safety interlocks and guards are provided as anintegral part of the equipment design. Thesedevices are provided for safety to the operator.

Never defeat, modify orbypass any safety devices,interlocks or operatingmechanism. This wouldmake the equipmentunsafe. Fire, explosion,severe injury, death andproperty damage couldoccur.

Do not operate thisequipment unless allcovers and panels are inplace.

INDICATORS AND CONTROLS (Fig. 3)

The following front panel indicators and controlsare provided:

1) On-Off Indicator - Indicates if the circuitbreaker is OFF (Green) or ON (Red). Whenthe indicator reads OFF, the main contacts ofthe circuit breaker are open. When theindication is ON, the main contacts areclosed.

2) Closing Spring Status Indicator (MU, ML

types only) - Indicates if the closing springsare CHARGED (Yellow) or DISCHARGED(White).

3) Manual Closing Handle – Rotating the

handle clockwise approximately 75° closesthe circuit breaker (On-Off indicator changesto ON). When the handle is released, itreturns to its normal position.

4) Manual Trip Lever (Red) – Pushing the lever

in the direction of the arrow trips the circuitbreaker (On-Off indicator changes to OFF).

5) Operations Counter - Indicates the totalaccumulated number of times the circuitbreaker has been closed.

Fig. 3 Indicators and Controls

DANGER

WARNING


RECEIVING, INSPECTION AND HANDLING Page 9

RECEIVING AND UNPACKING

The circuit breaker units are subjected to factoryproduction testing prior to being packed andshipped.

ACCEPTANCE INSPECTION

Confirm that the circuit breaker unit is complete,correct as specified and undamaged fromshipment and handling.

Upon receipt of the equipment, do the following:

1) Make an immediate inspection for damagewhich might have occurred during shipment.If damage is discovered, it should be notedwith the carrier prior to accepting theshipment, if possible.

2) Carefully unpack the equipment sufficiently tocheck for missing parts or concealeddamage.

3) Check for the presence of accessories that

are shipped with the circuit breaker:

- Closing Handle (shipped loose withMU and ML type breakers) (Fig. 4)

- Insulating cylinders (qty-6) (Fig. 5)

3) Keep the circuit breaker upright.

Never lay the circuitbreaker on its side orupside down. This maycause damage.

4) File a claim with the carrier for any damagedor missing items and immediately notify thenearest Toshiba representative.

Do not install or energizeequipment that has beendamaged. Damagedequipment can fail duringoperation, resulting in fireand explosion.

Fig. 4 Closing Handle

F

CAUTION

WARNING


ig. 5 Insulating Cylinder


RECEIVING, INSPECTION AND HANDLING

HANDLING AND MOVING

When handling and moving the circuit breaker,the techniques shown in this section may beused.

Care and caution should be used when handlingthe circuit breaker units to avoid damage to theequipment and personal injury. Always keep thecircuit breaker in a generally upright position.

Refer to Fig. 6 and Fig. 7 for the correctmethods of lifting and moving the circuitbreakers.

.

Fig. 6 Correct Method for Handling the U and

M

F

M


U Type Circuit Breakers

ig. 7 Correct Method for Handling the L and

L Type Circuit Breakers


INSTALLATION Page 11

Do not install thisequipment in areas whereunusual service conditionsexist. Using this equipmentin other than usual serviceconditions can result inequipment failure.

Toshiba HV6AS circuit breakers are intended foruse in usual service conditions as defined inIEEE C37.20.2. The temperature of the coolingair (ambient air temperature) surrounding thebreaker should be between the limits of -5°C(23°F) and +40°C (104°F). The altitude of theequipment installation should not exceed 3300 ft(1000 m).

In particular, avoid the following installationconditions:

- Excessive dust- Corrosive gases- Extreme variations in temperature- Very high or low humidity- Vibrations- Inclined locations

If there is a chance that condensation can occur

Fig. 8 Typical Circuit Breaker Nameplate

at the installation location, a space heater shouldbe installed inside the circuit breaker enclosure.

NOTE: Temperature, altitude or otherconditions outside of the usual limitsmay require derating or other specialequipment. Contact your nearestToshiba representative for additionalinformation.

RATING VERIFICATION

Prior to Installation, the maximum fault currentcapacity of the power system at the point ofinstallation should be verified. This value mustnot exceed the symmetrical interruptingcapability of the circuit breaker. Fig. 8illustrates a typical circuit breaker nameplate.

Do not exceed the ratingsspecified on the circuitbreaker nameplate orsystem accessories.Underrated equipment canfail during operationcausing fire, explosion,severe injury, death, andproperty damage.

WARNING

DANGER

HOUSTON, TEXAS U.S.A.

RATED VOLTAGEFREQUENCY

IMPULSE LEVELDIELECTRIC

SER. No.PARTS & WIRING, SEE INSTRUCTIONS

CONTINUOUS AMPS

WEIGHT

SHORT CKT. AMPSINTERRUPTING TIME

VACUUM CIRCUIT BREAKER

UV TRIP VOLTSMFG. STANDARD

SHUNT TRIP VOLTS

TOSHIBA INTERNATIONAL CORPORATION

CLOSE VOLTS 50/60 Hz

22 kV AC RMS 60 kV, CREST

630A, RMS

kg

MFG. DATE

lbs

HV6AS- 7.2/4.8 kV, RMS

TYPE

JIS C 4603-1990 JEC-2300-1985

120 VACVDCVDC

14/16 kA, RMS3 CYCLES

24 53

120 VAC / 125125

GF07Z301

MU-VV

98700221 7/98

TOSHIBA


INSTALLATIONMOUNTING THE CIRCUIT BREAKER TO APANEL

The circuit breakers are designed to mount to apanel made from 11 ga. (.12 in.) thick steel. Ifthe breaker must be mounted to a panel ofdifferent thickness, contact Toshiba.

Panel cutout dimensions for the circuit breakersare given in Fig. 12. One cutout size is used forall breaker types.

To mount the circuit breaker, follow the stepsbelow:

1. Loosen the small screw (M5) on the closinghandle and remove the handle.

2. Remove the four front plate mounting bolts

(M8) from the circuit breaker (Fig. 9). Remove the spacer washers between thefront plate and breaker and discard them(make sure none are left inside the breaker),

3. Align the breaker with the cutout andmounting holes on the panel to which it is tobe mounted (Fig. 10). Some breakers arefurnished with two hooks which may be usedto temporarily attach the breaker to thepanel.

4. Using the four M8 bolts removed in step 2,fasten the breaker and its front plate to themounting panel (Fig. 11). The tighteningtorque should be 120-150 kgf-cm (9-11 ft-lb).

5. Replace the closing handle removed in step1 and the M5 screw. The screw should betightened to a torque of 40-50 kgf-cm (35-43in-lb).

Fig. 9 Remove Front Plate and SpacerWashers

Fig. 10 Align Breaker With Panel Cutout

F

P


ig. 11 Fasten Breaker and Front Plate to

anel



Fig. 12 Panel Cutout Dimensions

10.71

0.38 RADIUS4 PLACES

0.343 DIA4 PLACES

0.25

0.25

0.25 0.25

8.03

Dimensions in Inches


INSTALLATION

MOUNTING DIRECTLY TO A SHELF

The shelf should be flat and level within ± 0.5mm (± 0.02 in.). If there are any noticeable gapsbetween the breaker and the shelf, fill them inusing flat washers as spacers.

Check to make sure the breaker On-Off indicatorshows OFF (green), then mount it by followingthe steps below:

1. Fasten the breaker onto steel angles or to aflat plate (Fig. 13). Use M8 hex head bolts(either 50 mm or 35 mm). The tighteningtorque should be 120-150 kgf-cm (9-11 ft-lb).

2. Either mounting method shown in (Fig. 14)

may be used.

Fig. 13 Mounting Breaker to Flat Plate orAngles

Fig. 14 Optional Hardware Orientation

ANGLE

PANEL

M8 x 35MM OR M8 x 50MM BOLT



MAIN CIRCUIT CABLE CONNECTIONS

Cables which connect to the circuit breakershould be routed to avoid interference with sharpedges and moving parts. Minimum bendingradius for the type of cable used should beobserved.

Power cables should be braced and/or laced towithstand short-circuit forces wherever suchcables are unsupported. Power cables shouldbe adequately sized to carry the maximumcontinuous current in accordance with NECrequirements and should have an adequatevoltage rating. Cables should be dressed andterminated as appropriate to the voltage classand cable manufacturer’s recommendations.When terminating shielded cables, usetermination kits appropriate for the systemvoltage to taper the insulation and reduceelectrical stress. Follow the manufacturer’sinstallation instructions provided with thetermination kit.

To connect cables, follow the steps below:

1. Pass the cable through the insulatingcylinder (six cylinders are supplied with thecircuit breaker) (Fig. 15).

2. Fasten the cable to the main circuit terminal

(Fig. 16). Use 35 mm Class 8.8 M10 or M12hex head bolts, 2 flat washers, a lockwasher and a nut. While securely preventingthe bolt from rotating with a wrench, torquethe nut to 250-315 kgf-cm (18-23 ft-lb) forM10 bolts or 450-565 kgf-cm (32-41 ft-lb) forM12 bolts.

Use two wrenches to torquethe connection to preventapplying excessive force tothe terminal which candamage the frame.

3. Fasten the insulating cylinder in place, thencheck to make sure that the hook is engaged(Fig. 17).

Fig. 15 Pass Cable Through Insulating

CF

T

F

CAUTION


ylinderig. 16 Fasten Cable to Main Circuit

erminal

ig. 17 Fasten Insulating Cylinder


INSTALLATION

GROUND CONNECTIONS

The circuit breaker must be grounded inaccordance with the requirements of the NationalElectrical Code, Article 250 or applicable localstandards.

Proper groundingconnections must be madeto the circuit breaker beforeincoming power is applied.

It is very important that the circuit breaker and itsenclosure be adequately grounded to protect theoperator from injury in the event of short circuitsor other abnormal occurences and to ensure thatthe metal parts of the equipment, other than liveparts, remain at ground potential.

For U and MU type circuit breakers, the groundterminal is on the left side of the operatingmechanism as viewed from the rear of thebreaker. To make the ground connection, firstremove the fastening M6 hex head bolt andcrimp-on terminal (provided with the breaker)and crimp the terminal to the end of the groundwire (Fig. 18). Then, reattach the terminal usingthe same bolt previously removed and torque to50-65 kgf-cm (43-56 in-lb).

For L and ML type circuit breakers, the groundterminal is on the left side of the terminal blockas viewed from the rear of the breaker (Fig. 19).The same instructions as for the U and MUbreaker above should be followed to attach theground wire.

Fig. 18 Ground Connection for U and MUType Breakers

FT

WARNING


ig. 19 Ground Connection for L and MLype Breakers



CONTROL CIRCUIT CONNECTIONS

Control circuit wiring is connected to the terminalblock on the top of the operating mechanism(Fig. 20). Connect control wires in accordancewith the appropriate wiring diagram shown in Fig.28 through Fig. 31 in the OPERATION section ofthis manual.

On the U and MU type breakers, connections toauxiliary contacts are made directly to theauxiliary switch (Fig. 21).

On the L and ML type breakers, connections toauxiliary contacts are made to a terminal blockon top of the operating mechanism (Fig. 22).

ADDITIONAL AUXILIARY SWITCH (Optional)

An optional second auxiliary switch may befurnished, located on the right side as viewedfrom the rear of the breaker.

When a second auxiliary switch is furnished,control wires are connected directly to theswitch.

Fig. 20 Connection to Control Terminal

BF

aF

a


lockig. 21 Auxiliary Contact Connections on U

nd MU Type Breakersig. 22 Auxiliary Contact Connections on L

nd ML Type Breakers


PRE-ENERGIZATION CHECK

GENERAL

BEFORE ENERGIZING THE CIRCUITBREAKER for the first time, follow the procedurebelow to verify that the equipment is properlyinstalled and functional.

Hazardous Voltage. Turn offand lock out all primary andcontrol circuit powersources prior to performingthis pre-energization check.

Do not operate thisequipment until a completesafety inspection has beenmade.

Do not energize damagedequipment that has notbeen repaired or verified.

Do not remove, cover ordestroy any safety signs.

Do not operate thisequipment until all panelsand covers have beeninstalled.

All blocks or other temporary braces used forshipment must be removed.

Before closing the enclosure, all metal chips,scrap wire and other debris left over frominstallation must be cleaned out.

Cover all unused openings. Install all panels,guards and covers.

A supply of spare parts should beestablished.

Instruction manuals and diagrams should becollected and filed.

ELECTRICAL CHECKS

Electrical shock hazard. Do not touch energizedcomponents during a testusing auxiliary power.

An electrical insulation resistance test shouldbe performed to verify that the circuit breakerand associated field wiring are free fromshort circuits and grounds. Refer to theMAINTENANCE Section of this manual foradditional information.

Hazardous voltages arepresent during dielectrictesting which can result inserious injury or death. High potential tests shouldbe performed only byqualified personnel.

The circuit breaker must be set to the OFFposition before energizing incoming power.

DANGER

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING


OPERATION Page 19

MANUAL OPERATION

Powerful springs. Do notplace your hands or anypart of your body insidethe circuit breaker whilethe indicators showCHARGED (yellow) or ON(red).

To avoid damaging themechanism, do not closethe circuit breaker whenthe On-Off Indicator showsON (red).

MANUAL CLOSING (Motor-Operated MU andML Types):

1. Check to make sure that the On-Offindicator shows OFF (green).

2. Attach the closing handle to the breaker if it

is not already attached.

3. If the closing spring status indicator showsDISCHARGED (white):

Turn the closing handle clockwise (Fig. 23).The breaker will close (On-Off indicatorchanges to ON) after the handle is turnedapproximately 75° (Fig. 24).

NOTE If the handle is turned in smallincrements, the closing spring willstore the energy from the handleaction and the circuit breaker willclose before 75° of rotation.

If the closing spring status indicator showsCHARGED (yellow):

Turn the closing handle clockwise. Thebreaker will close after the handle is turnedapproximately 10°.

4. Release the handle, and it will return to itsinitial position.

Fig. 23 Preparing to Manually Close Breaker

F

WARNING

CAUTION


ig. 24 Manually Closing Breaker


OPERATION

MANUAL CLOSING (Manual Spring-OperatedU and L Types):

1. Check to make sure that the On-Offindicator shows OFF (green).

2. Turn the closing handle clockwise. Thebreaker will close (On-Off indicator changesto ON) after the handle is turnedapproximately 75°.

NOTE If the handle is turned in smallincrements, the closing spring willstore the energy from the handleaction and the circuit breaker willclose before 75° of rotation.

3. Release the handle, and it will return to itsinitial position.

MANUAL OPENING (All Types):

1. Push the trip lever in the direction of thearrow (Fig. 25).

2. The On-Off indicator changes to OFF(green).

ELECTRICAL OPERATION

The flow chart shown in Fig. 27 illustrates thesequence of electrical operation of the MU andML type circuit breakers.

Refer to Fig. 26 and the circuit breakerschematics shown in Fig. 28 through Fig. 31 fordetermining external control circuit connectionsto the circuit breaker.

Fig. 25 Manually Opening Breaker

SYMBOL DESCRIPTION

F


M MotorTC Voltage Trip CoilUV Undervoltage Trip Coil

a1 to a6 Auxiliary Contacts (N.O.)b1 to b6 Auxiliary Contacts (N.C.)

X Control RelayX-a Control Relay Contact (N.O.)X-b Control Relay Contact (N.C.)Y Auxiliary Relay

Y-a Auxiliary Relay Contact (N.O.)Y-b Auxiliary Relay Contact (N.C.)

LS1 to LS3 Limit SwitchesR1 to R4 Resistors

REC RectifierD DiodeC Capacitor

SP Surge ProtectorRL Red LampGL Green Lamp

ig. 26 Legend for Schematics


OPERATION Page 21

Fig. 27 Electrical Operation Flow Chart for MUand ML Type Breakers

Circuit Breaker Open

Control Power Applied

Motor Begins Operating

Closing Springs Begin Charging

Closing Springs Charged

Motor Stops

Closing Signal Given

Motor Begins Operating

Circuit Breaker Closes

Auxiliary Relay Closes

Anti-Pumping Circuit Completed

Opening Signal Given

Trip Coil Energized

Circuit Breaker Opens

- - - - Spring Status Indicator Changes to Yellow

- - - - Standby for Close Operation

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- - - - Spring Status Indicator Changes to White and On-Off Status Changes to ON

- - - - Next Close Operation is Not Possible Unless Close Signal is Canceled

- - - - On-Off Status Indicator Changes to OFF

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OPERATION

Fig. 28 125 VDC Control Circuit Schematic for U Type Circuit Breaker

Fig. 29 125 VDC Control Circuit Schematic for L Type Circuit Breaker

a3 a2 a1 b3 b2 b1 a6 b5a4a5 b6 b4TCUV

C4 K 15 14 13 12 11 16 15 14 13 12 11

C04 N2 25 24 23 22 21 26 2425 2223 21

C04C4N2K

Terminal Layout(As Viewed From Front of Circuit Breaker)

OFF

125 VDCSUPPLY

+

-

RL GL

120 VACSUPPLY

Optional Auxiliary Contacts

Circuit Breaker ComponentsShown Inside Box

a3 a2 a1 b2 b1 b6 a5b4b5 a6 a4TCUV

C4 K A2 A1 B2 B1 16 15 14 13 12 11

C04 N2 A02 A01 B02 B01 26 2425 2223 21

C04C4N2K


OFF

125 VDCSUPPLY

+

-

RL GL

120 VACSUPPLY

Optional Auxiliary Contacts


A01A1 A2 A02 B1 B01 B2 B02


OPERATION Page 23

Fig. 30 125 VDC Control Circuit Schematic for MU Type Circuit Breaker

Fig. 31 125 VDC Control Circuit Schematic for ML Type Circuit Breaker

a3 a2 a1 b3 b2 b1 a6 b5a4a5 b6 b4

TCUV

C4 K 15 14 13 12 11 16 15 14 13 12 11

C04 N2

25 24 23 22 21 26 2425 2223 21

C04C4N2K


OFF

SUPPLY

+

-

RL GL

120 VACSUPPLY

Optional Auxiliary Contacts(Connect Wires Directly ToAuxiliary Switch Terminals)


SPREC

M

LS2

LS3 LS3

X-b

R1 X-a

X-a

X-a

H

ON

PR3

D

R2

Y-b

X Y

R3

Y-a

Y-b

C

R4

LS1

NT3

HPR3 NT3

Components Inside Dashed Box LocatedOn Control Circuit Board

125 VDC

a3 a2 a1 b2 b1 b6 a5b4b5 a6 a4

TCUV

C4 K A2 A1 B2 B1 16 15 14 13 12 11

C04 N2

A02 A01 B02 B01 26 2425 2223 21

C04C4N2K


OFF

SUPPLY

+

-

RL GL

120 VACSUPPLY

Optional Auxiliary Contacts(Connect Wires Directly ToAuxiliary Switch Terminals)


SPREC

M

LS2

LS3 LS3

X-b

R1 X-a

X-a

X-a

H

ON

PR3

D

R2

Y-b

X Y

R3

Y-a

Y-b

C

R4

LS1

NT3

HPR3 NT3

Components Inside Dashed Box LocatedOn Control Circuit Board

125 VDC

A1 A2 B1 B2A01 A02 B01 B02


OPERATION

UNDERVOLTAGE TRIP

All HV6AS fixed mounted circuit breakers arefurnished with an undervoltage trip device. Theundervoltage trip device operates to trip thecircuit breaker OFF unless 120VAC controlpower is present at the terminals of relay UV.

When the circuit breakers are shipped, theundervoltage trip device is defeated by a factory-installed plug (Fig. 32). If this plug is left inplace, the circuit breaker will operate normallywithout power applied to relay UV. Removingthis plug (Fig. 33) activates the undervoltage tripfunction.

Fig. 32 Plug Installed in UV Trip Device

F


ig. 33 Removing Plug From UV Trip Device


MAINTENANCE Page 25

MAINTENANCE PROGRAM

In order to ensure continued reliable and safeoperation of the equipment, a program ofperiodic maintenance must be established.Operating and environmental conditions willusually dictate the frequency of inspectionrequired. NFPA Publication 70B "ElectricalEquipment Maintenance" may be used as aguide for setting up the maintenance program.

Contact with energizedcomponents can causesevere injury, death andproperty damage. Turn offand lock-out primary andcontrol circuit power beforeservicing.

Improper maintenance cancause severe injury, deathand property damage. Onlyqualified and authorizedpersons are to install,operate or service thisequipment.

Grease is conductive. Donot allow grease or anyother substances tocontaminate insulatingmaterials. Contaminatedinsulators can allow ashort-circuit or groundfault to occur.

NOTE: Refer to the SAFETY section of thismanual for important information.

MAINTENANCE RECORD

Keep a permanent record of all maintenancework. At a minimum, this record should includeinformation on:

1) Items inspected2) Reports of any testing3) Equipment condition4) Corrective actions or adjustments5) Date of work

6) Comments

The degree of detail of the record will dependsomewhat on the operating conditions.

SERVICING EQUIPMENT

For your safety, turn off and lock out main andcontrol circuit power before servicing the circuitbreaker. Certain minimum safety proceduresmust be followed:

1) Only qualified personnel should attemptthis service.

2) Never perform service on or next to

exposed components energized with linevoltage.

Failure to adhere to thesesafety procedures canresult in severe injury,death and propertydamage.

WARNING

DANGER

WARNING

WARNING


MAINTENANCE

RECOMMENDED INSPECTION ANDMAINTENANCE TYPES

NOTE: Refer to the SAFETY section of thismanual for important information.

A. Acceptance Inspection

This inspection confirms that the circuitbreaker unit is complete, correct as specified,and undamaged from shipment. Theprocedure for this inspection is outlined in theRECEIVING, INSPECTION AND HANDLINGsection of this manual.

B. Patrol Inspection

Inspection is made of the condition of thecircuit breaker while it is energized. Checkthat no unusual sounds or smells existexternally.

Inspection Frequency: Once every 6 months

C. Periodic Inspection

Inspection is performed wth the circuitbreaker de-energized. The lubrication ofsliding and rotating parts is checked and themechanism is lubricated if needed.

Inspection Frequency: Once every 1-3 yearsor every 3000 operations (normal). Onceevery 6 years (detailed).

Refer to Table 2 for the schedule of PeriodicInspections.

D. Unscheduled Inspection

Inspections are implemented as required.

Inspection Frequency: As needed

NOTE: The inspection frequency and pointsto be inspected may vary from theabove recommendations dependingon the status of use, frequency ofswitching, amount of currentinterrupted and other factors.

Table 1 Tightening Torques

ScrewNominal

Dia.Tightening Torque

M4 15-20 kgf-cm13-17 in-lb

M5 30-40 kgf-cm ()26-34 in-lb

M6 50-65 kgf-cm ()43-56 in-lb

M8 120-150 kgf-cm ()9-11 ft-lb

M10 250-315 kgf-cm ()18-23 ft-lb

M12 450-565 kgf-cm ()32-41 ft-lb


MAINTENANCE Page 27

Table 2 Check Points for Periodic Inspection

Check Point Check Item Check Method Criteria Disposition

OperatingMechanism

Loose bolts,nuts or screws

Tighten usingscrewdriver orwrench.

Make sure all bolts, nutsand screws are tight.

Tighten if loose. See Table 1 fortightening torques.

Dust or foreignmatter inside

Visualinspection.

The circuit breakershould be clean andcontain no foreign matter.

Wipe with a cleandry cloth.

Indicatoroperation

Visualinspection.

Make sure the number ofoperations is correctlydisplayed.

Check the causeand repair.

Warpage Visualinspection.

There should be nowarpage or missingparts.

Check the causeand repair.

Smoothoperation

Manualoperation. Visualinspection ortouch. Checklubrication.

Make sure moving partsoperate smoothly.

Apply a smallamount oflubrication.

Main Circuit Discolorationdue to heatfrom conductingparts

Visualinspection.

Make sure there is nodiscoloration.

Check the causeand repair. Tightenconnections to circuitbreaker. See Table1 for tighteningtorques.

Loose bolts,nuts or screws

Tighten using awrench.

Make sure all bolts, nutsand screws are tight.

See Table 1 fortightening torques.

Dust on surfaceof vacuuminterrupter

Visualinspection.

Make sure there is nodust on the surface.

Wipe with a clean,dry cloth.

Insulator Dust, foreignmatter ordamage

Visualinspection.

Make sure there is nodust, foreign matter orbreakage.

Wipe with a clean,dry cloth. Ifdamaged, contactToshiba.


MAINTENANCE

Table 2. Check Points for Inspection (cont’d)

Check Point Check Item Check Method Criteria What to do

AuxiliarySwitch

Terminals looseor disconnected

Visualinspection. Tighten using ascrewdriver.

Make sure terminals arenot loose or disconnected.

Repair ifdisconnected. Tighten if loose. See Table 1 fortightening torques.

Case/contacts Visualinspection.

Make sure there is nodamage or warping.

Replace if damagedor warped.

ControlCircuits

Smoothmovement ofmotor chargingmechanism

Energize thecontrol circuit.

Breaker (motor-operatedtype) should chargequickly and smoothly.

If the circuit fails tooperate, check thecause and repair.

Terminals looseor disconnected

Visualinspection. Tighten using ascrewdriver.

Make sure terminals arenot loose or disconnected.

Repair ifdisconnected. Tighten if loose. See Table 1 fortightening torques.

InsulationResistanceMeasure-ment

Meaure maincircuit to ground

Megger test at1000V.

Resistance should be500MΩ or greater.

Meaurebetween maincircuit terminals

Megger test at1000V.


Meaure controlcircuits toground

Megger test at500V.


If the insulationresistance is low,wipe off the vacuuminterrupter and otherinsulation surfaceswith a clean drycloth and thenrepeat the test.


MAINTENANCE Page 29

VACUUM CHECK

A sufficient level of vacuum is necessary forproper performance of the vacuum interrupters.Although vacuum leaks are rare, the vacuumintegrity should be checked periodically. Therelationship between dielectric breakdownvoltage of the contact gap and internal vacuuminterrupter pressure has been found to begenerally predictable. Therefore, vacuuminterrupter integrity is checked by performing ahigh potential test across the open gap of theinterrupter.

TEST EQUIPMENT:

Toshiba offers a compact vacuum checker (TypeCI35-1D) which enables a quick and easy checkon vacuum interrupter internal pressure.Alternatively, any commercially available AC highpotential tester may be used which is capable ofdelivering at least 25 milliamperes at 22 kV for aperiod of one minute.

PRECAUTIONS:

Applying abnormally high voltage across a pair ofcontacts in vacuum may produce X-rays. Theradiation may increase with the increase involtage and/or decrease in contact spacing. X-radiation produced during this test withrecommended voltage and normal contactspacing is extremely low and well below themaximum permitted by standards. As anadditional safety measure, however, it isrecommended that all personnel keep at least 1meter (3.3 ft) away from the vacuum circuitbreaker while this test is performed.

Radiation exposure hazard.X-rays may cause illness orinjury. Stay at least 1 meter(3.3 ft) away from the circuitbreaker during the vacuumcheck test .

Hazardous voltages arepresent during dielectrictesting which can result insevere injury or death. Only qualified personnelshould conduct this testing.

TEST PROCEDURE:

1. The circuit breaker should be disconnectedfrom the main circuit and be in the OFFposition.

2. Connect all the line side primary terminals

together and to the output of the vacuumchecker or AC hi-pot machine. Connect allthe load side primary terminals together andto the ground terminal of the vacuum checkeror 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 minuteand observe the current drawn by theinterrupter.

4. Decrease the voltage back to zero.

Fig. 34 Toshiba Portable Vacuum Checker

WARNING

WARNING


MAINTENANCE

CRITERIA:

1. If a current flow above 5 milliamperes isobserved or if breakdown occurs, one ormore of the interrupters has insufficientvacuum and must be replaced.

Exception: If the current exceeds 5milliamperes the first time the voltage isbrought up, reduce the voltage to zero andincrease it again. It may be necessary torepeat this procedure a few times.

2. If the breaker fails to meet criteria 1, thenrepeat the test on each pole separately toidentify the damaged interrupter orinterrupters.

3. If the voltage can be held for 1 minute and

the current flow does not exceed 5milliamperes, the interrupter has a sufficientvacuum level.

After the test is complete, discharge any residualstatic charge from the primary terminals of thecircuit breaker.

If a vacuum checker or AC hi-pot tester is notavailable, a DC hi potential test may beconducted. If a DC test is conducted, the testvoltage must be increased to 31kV DC. The testduration for DC tests and the criteria foracceptance remain the same as for AC tests.

Do not use DC hi-pottesters which employunfiltered half-waverectifiers. The peakvoltages produced by thesetesters may exceed therecommended value of31kV. This can result in theproduction of harmful X-rays and may invalidate thetest results.

Fig. 35 Application of Test Voltage forVacuum Check

1 minute22kV AC(31kV DC)

Voltage

Zero

15 sec 15 sec

Time

WARNING


DISPOSAL Page 31

DISPOSAL

Contact your state environmental agency fordetails on disposal of electrical components andpackaging in your particular area.


STORAGE Page 32

STORAGE

If the circuit breaker is to be stored for any lengthof time prior to installation, the followingprecautions should be taken:

1) The original packing should be restored, ifpossible.

2) Do not subject the equipment to moisture orsun rays. Store in cool, clean, and drylocation.

3) Place a dust cover over the circuit breakerpackaging to protect against dirt andmoisture.

4) Store in an upright position.

INSPECTION DURING STORAGE

Routine scheduled inspection is necessary ifstorage is for an extended period. The unitshould be checked for condensation, moisture,corrosion, and vermin.

Prior to installation, the circuit breaker should becarefully examined for evidence of physicaldamage, corrosion, or other deterioration. Referto the PRE-ENERGIZATION Section of thismanual.

The MAINTENANCE section of this manualdescribes various types of inspectionsrecommended for this circuit breaker during theoperation period.


SPECIFICATIONS Page 33

Table 3 Circuit Breaker Ratings – Manual Operation HV6AS-U and HV6AS-L Types

Rated Voltage kV, rms 7.2 4.8Rated Low Frequency Withstand Voltage kV, rms 22Impulse Withstand Voltage kV, crest 60Rated Continuous Current A, rms 630Rated Frequency Hz 50/60Rated Short-Circuit Breaking Current kA, rms 14 16Rated Short-Circuit Making Current kA, crest 35 40Rated Short-Time Withstand Current (2 sec) kA, rms 12.5Rated Interrupting Time (60Hz Basis) cycles 3Opening Time msec 8 - 25Rated Control Voltage (Opening) V DC 30, 125Rated Control Voltage (Undervoltage Trip) V AC 120Operating Duty O - 1 min - CO - 3 min - COAuxiliary Contacts 2 N.O. - 2 N.C.Weight kg 22 (U Type) 25 (L Type)

Table 4 Circuit Breaker Ratings – Motor Stored Energy Operation HV6AS-MU and HV6AS-MLTypes

Rated Voltage kV, rms 7.2 4.8Rated Low Frequency Withstand Voltage kV, rms 22Impulse Withstand Voltage kV, crest 60Rated Continuous Current A, rms 630Rated Frequency Hz 50/60Rated Short-Circuit Breaking Current kA, rms 14 16Rated Short-Circuit Making Current kA, crest 35 40Rated Short-Time Withstand Current (2 sec) kA, rms 12.5Rated Interrupting Time (60Hz Basis) cycles 3Opening Time msec 8 - 25Closing Time msec 150 - 300Charging Time sec 1.5 - 3Rated Control Voltage (Closing/Charging) V AC 120, DC 125Rated Control Voltage (Opening) V DC 30, 125Rated Control Voltage (Undervoltage Trip) V AC 120Operating Duty O - 1 min - CO - 3 min - COAuxiliary Contacts 2 N.O. - 2 N.C.Weight kg 24 (MU Type) 27 (ML Type)


WARRANTY AND LIMITATION OF LIABILITY

Toshiba International Corporation ("Company") warrants that all equipment and parts described herein will be freefrom defects in materials and workmanship. THIS WARRANTY WILL EXPIRE EIGHTEEN (18) MONTHS AFTERTHE DATE ON WHICH SUCH EQUIPMENT AND PARTS (EXCLUDING REPAIRED OR REPLACEMENTEQUIPMENT AND PARTS FURNISHED PURSUANT TO THIS WARRANTY) ARE SHIPPED BY THE COMPANYTO THE INITIAL PURCHASER OR TWELVE (12) MONTHS AFTER SUCH EQUIPMENT AND PARTS(EXCLUDING REPAIRED OR REPLACEMENT EQUIPMENT AND PARTS FURNISHED PURSUANT TO THISWARRANTY) ARE FIRST PLACED IN OPERATION, WHICHEVER PERIOD FIRST EXPIRES.

The Company will, at its option, repair or replace such equipment or part which is defective under the terms of theforegoing warranty, free of charge; provided the purchaser (1) promptly notifies the Company in writing of suchdefect, and (2) furnishes the Company satisfactory proof thereof, and (3) establishes that the equipment or part hasbeen properly installed, maintained and operated within the limits of rated capacity and normal usage and inaccordance with this manual, and (4) if requested by the Company, returns the defective equipment or part to theCompany and pays all expenses incurred in connection with such return. The repaired or replacement equipment orpart will be delivered, free of charge, to the purchaser F.O.B. the Company's warehouse or, at the Company's option,F.O.B. a Company authorized service shop, not loaded on truck or other carrier. The purchaser will pay the costsapplicable to the equipment or part following such delivery, including, without limitation, all handling, transportation,assembly, insurance, testing and inspection charges.

THE FOREGOING OBLIGATION TO REPAIR OR REPLACE EQUIPMENT PARTS SHALL BE THE SOLE ANDEXCLUSIVE REMEDY OF THE PURCHASER, ITS CUSTOMERS AND USERS OF THE EQUIPMENT ANDPARTS FOR BREACH OF THE FOREGOING WARRANTY. THE COMPANY WILL HAVE NO OBLIGATIONS TODISASSEMBLE ANY EQUIPMENT OR PART WHICH IS DEFECTIVE WITHIN THE TERMS OF THE ABOVEWARRANTY OR TO INSTALL ANY REPAIRED OR REPLACEMENT PART OR EQUIPMENT OR TO PAY ANYCOSTS INCURRED IN CONNECTION WITH ANY SUCH DISASSEMBLY OR INSTALLATION. THE COMPANY,TOSHIBA CORPORATION AND THEIR SUPPLIERS AND SUBCONTRACTORS HEREBY DISCLAIM ALLOTHER EXPRESS, STATUTORY AND IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, ALLEQUIPMENT AND PARTS FURNISHED PURSUANT TO THE FOREGOING WARRANTY AND ALL IMPLIEDWARRANTIES OF MERCHANTABILITY.

The total liability of the Company, Toshiba Corporation and their suppliers and subcontractors for any loss, damageor claim, whether in contact, tort (including negligence and liability without fault), or otherwise, arising out of,connected with or resulting from the equipment and parts described in this manual or the performance or breach ofany contract for the sale or supply of such equipment and parts, or from the design, manufacture, sale, delivery,resale, installation, technical direction or supervision of installation, inspection, testing, repair, replacement,operation, maintenance or use of any such equipment or part or any service relating thereto furnished by theCompany shall not in any event exceed the price allocable to the equipment, part or service which gives claim, lossor damage. In no event, whether as a breach of contract or warranty, alleged negligence, liability without fault, orotherwise, shall the Company, Toshiba Corporation or their suppliers or subcontractors be liable for special orconsequential damages, including, without limitation, loss or profits or revenue, loss of equipment described hereinor any associated equipment, cost of capital, cost of substitute equipment or parts, facilities or services, down-timecosts, labor costs or claims of customers of the purchaser for such damages.


Toshiba HV6AS Vacuum Circuit Breakers Installation Manual · inspecting, handling, lifting and...

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