Toshiba HV6AS User Manual Download

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Document: GF07Z301 Rev. 1

INSTRUCTION MANUAL

INSTALLATION - OPERATION - MAINTENANCE

HV6AS Vacuum Circuit Breakers – Fixed Type
4.8 & 7.2kV Voltage Classes

APPLICABLE MODEL NUMBERS:

(Manual Operation Types)

HV6AS-U
HV6AS-L

(Motor Operation Types)

HV6AS-MU
HV6AS-ML

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

Summary of Contents for HV6AS

Page 1: ...ALLATION OPERATION MAINTENANCE HV6AS Vacuum Circuit Breakers Fixed Type 4 8 7 2kV Voltage Classes APPLICABLE MODEL NUMBERS Manual Operation Types HV6AS U HV6AS L Motor Operation Types HV6AS MU HV6AS ML Issued 2 2000 Supercedes First Issue Dated 2 99 ...

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Page 3: ...ba address all correspondence to Field Service Department Toshiba International Corporation 13131 West Little York Road Houston 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 Inst...

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Page 5: ...ty damage if you do not follow instructions Means that you might be seriously injured or killed if you do not follow instructions Severe property damage might also occur Means that you might be injured if you do not follow instructions Equipment damage 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 sig...

Page 6: ...n 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 in accordance with established practices 6 Be trained in rendering first aid SAFETY CODES Toshiba HV6AS vacuum circuit br...

Page 7: ...ury death fire explosion and property 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 ...

Page 8: ...o a Shelf 14 Main Circuit Cable Connections 15 Ground Connections 16 Control Circuit Connections 17 Additional Auxiliary Switch 17 PRE ENERGIZATION CHECK 18 General 18 Electrical Checks 18 OPERATION 19 Manual Operation 19 Electrical Operation 19 Undervoltage Trip 24 MAINTENANCE 25 Maintenance Program 25 Maintenance Record 25 Servicing Equipment 25 Inspection and Maintenance Types 26 Table 1 Tighte...

Page 9: ... Page 5 Inspection During Storage 32 SPECIFICATIONS 33 Table 3 Ratings Manual Operation HV6AS U and HV6AS L Types 33 Table 4 Ratings Motor Operation HV6AS MU and HV6AS MU Types 33 WARRANTY AND LIMITATION OF LIABILITY 34 ...

Page 10: ... manual is divided into major sections of interest as follows GENERAL DESCRIPTION Provides a description of the equipment information on major components 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 br...

Page 11: ...harge the closing springs and to close the breaker upon command Both types can be tripped electrically and also include undervoltage release Arc interruption is accomplished inside sealed vacuum interrupters mounted on track resistant insulators Vacuum interrupters use low surge contact materials which exhibit low current chopping levels reducing switching overvoltages Fig 1 and Fig 2 illustrate a...

Page 12: ...he circuit breaker is OFF Green or ON Red When the indicator reads OFF the main contacts of the circuit breaker are open When the indication is ON the main contacts are closed 2 Closing Spring Status Indicator MU ML types only Indicates if the closing springs are CHARGED Yellow or DISCHARGED White 3 Manual Closing Handle Rotating the handle clockwise approximately 75 closes the circuit breaker On ...

Page 13: ...ment if possible 2 Carefully unpack the equipment sufficiently to check for missing parts or concealed damage 3 Check for the presence of accessories that are shipped with the circuit breaker Closing Handle shipped loose with MU and ML type breakers Fig 4 Insulating cylinders qty 6 Fig 5 3 Keep the circuit breaker upright Never lay the circuit breaker on its side or upside down This may cause dama...

Page 14: ...d when handling the circuit breaker units to avoid damage to the equipment and personal injury Always keep the circuit breaker in a generally upright position Refer to Fig 6 and Fig 7 for the correct methods of lifting and moving the circuit breakers Fig 6 Correct Method for Handling the U and MU Type Circuit Breakers Fig 7 Correct Method for Handling the L and ML Type Circuit Breakers ...

Page 15: ...ide of the usual limits may require derating or other special equipment Contact your nearest Toshiba representative for additional information RATING VERIFICATION 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 Fig 8 illustrates a ty...

Page 16: ...e spacer washers between the front plate and breaker and discard them make sure none are left inside the breaker 3 Align the breaker with the cutout and mounting holes on the panel to which it is to be mounted Fig 10 Some breakers are furnished with two hooks which may be used to temporarily attach the breaker to the panel 4 Using the four M8 bolts removed in step 2 fasten the breaker and its fron...

Page 17: ...INSTALLATION Page 13 Fig 12 Panel Cutout Dimensions 10 71 0 38 RADIUS 4 PLACES 0 343 DIA 4 PLACES 0 25 0 25 0 25 0 25 8 03 Dimensions in Inches ...

Page 18: ...re the breaker On Off indicator shows OFF green then mount it by following the steps below 1 Fasten the breaker onto steel angles or to a flat plate Fig 13 Use M8 hex head bolts either 50 mm or 35 mm The tightening torque 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 or Angles Fig 14 Optional Hardware Orientation ANGL...

Page 19: ...insulation and reduce electrical stress Follow the manufacturer s installation instructions provided with the termination kit To connect cables follow the steps below 1 Pass the cable through the insulating cylinder six cylinders are supplied with the circuit breaker Fig 15 2 Fasten the cable to the main circuit terminal Fig 16 Use 35 mm Class 8 8 M10 or M12 hex head bolts 2 flat washers a lock wa...

Page 20: ...and MU type circuit breakers the ground terminal is on the left side of the operating mechanism as viewed from the rear of the breaker To make the ground connection first remove the fastening M6 hex head bolt and crimp on terminal provided with the breaker and crimp the terminal to the end of the ground wire Fig 18 Then reattach the terminal using the same bolt previously removed and torque to 50 ...

Page 21: ...the auxiliary switch Fig 21 On the L and ML type breakers connections to auxiliary contacts are made to a terminal block on top of the operating mechanism Fig 22 ADDITIONAL AUXILIARY SWITCH Optional An optional second auxiliary switch may be furnished located on the right side as viewed from the rear of the breaker When a second auxiliary switch is furnished control wires are connected directly to...

Page 22: ...hips scrap wire and other debris left over from installation must be cleaned out Cover all unused openings Install all panels guards and covers A supply of spare parts should be established Instruction manuals and diagrams should be collected and filed ELECTRICAL CHECKS Electrical shock hazard Do not touch energized components during a test using auxiliary power An electrical insulation resistance...

Page 23: ...ng spring status indicator shows DISCHARGED white Turn the closing handle clockwise Fig 23 The breaker will close On Off indicator changes to ON after the handle is turned approximately 75 Fig 24 NOTE If the handle is turned in small increments the closing spring will store the energy from the handle action and the circuit breaker will close before 75 of rotation If the closing spring status indic...

Page 24: ...ator changes to OFF green ELECTRICAL OPERATION The flow chart shown in Fig 27 illustrates the sequence of electrical operation of the MU and ML type circuit breakers Refer to Fig 26 and the circuit breaker schematics shown in Fig 28 through Fig 31 for determining external control circuit connections to the circuit breaker Fig 25 Manually Opening Breaker SYMBOL DESCRIPTION M Motor TC Voltage Trip C...

Page 25: ... 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 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 Stat...

Page 26: ...erminal Layout As Viewed From Front of Circuit Breaker OFF 125 VDC SUPPLY RL GL 120 VAC SUPPLY Optional Auxiliary Contacts Circuit Breaker Components Shown Inside Box a3 a2 a1 b2 b1 b6 a5 b4 b5 a6 a4 TC UV C4 K A2 A1 B2 B1 16 15 14 13 12 11 C04 N2 A02 A01 B02 B01 26 24 25 22 23 21 C04 C4 N2 K Terminal Layout As Viewed From Front of Circuit Breaker OFF 125 VDC SUPPLY RL GL 120 VAC SUPPLY Optional A...

Page 27: ...x SP REC 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 H PR3 NT3 Components Inside Dashed Box Located On Control Circuit Board 125 VDC a3 a2 a1 b2 b1 b6 a5 b4 b5 a6 a4 TC UV C4 K A2 A1 B2 B1 16 15 14 13 12 11 C04 N2 A02 A01 B02 B01 26 24 25 22 23 21 C04 C4 N2 K Terminal Layout As Viewed From Front of Circuit Breaker OFF SUPPLY RL GL 120 VAC SUPPLY Optional Auxiliar...

Page 28: ...l power is present at the terminals of relay UV When the circuit breakers are shipped the undervoltage trip device is defeated by a factory installed plug Fig 32 If this plug is left in place the circuit breaker will operate normally without power applied to relay UV Removing this plug Fig 33 activates the undervoltage trip function Fig 32 Plug Installed in UV Trip Device Fig 33 Removing Plug From...

Page 29: ...o contaminate insulating materials Contaminated insulators can allow a short circuit or ground fault to occur NOTE Refer to the SAFETY section of this manual for important information MAINTENANCE RECORD Keep a permanent record of all maintenance work At a minimum this record should include information on 1 Items inspected 2 Reports of any testing 3 Equipment condition 4 Corrective actions or adjus...

Page 30: ...ed wth the circuit breaker de energized The lubrication of sliding and rotating parts is checked and the mechanism is lubricated if needed Inspection Frequency Once every 1 3 years or every 3000 operations normal Once every 6 years detailed Refer to Table 2 for the schedule of Periodic Inspections D Unscheduled Inspection Inspections are implemented as required Inspection Frequency As needed NOTE ...

Page 31: ...ng parts Check the cause and repair Smooth operation Manual operation Visual inspection or touch Check lubrication Make sure moving parts operate smoothly Apply a small amount of lubrication Main Circuit Discoloration due to heat from conducting parts Visual inspection Make sure there is no discoloration Check the cause and repair Tighten connections to circuit breaker See Table 1 for tightening t...

Page 32: ...pe should charge quickly and smoothly If the circuit fails to operate check the cause and repair Terminals loose or disconnected Visual inspection Tighten using a screwdriver Make sure terminals are not loose or disconnected Repair if disconnected Tighten if loose See Table 1 for tightening torques Insulation Resistance Measure ment Meaure main circuit to ground Megger test at 1000V Resistance sho...

Page 33: ...ng 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 however 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 f...

Page 34: ...illiamperes 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 accepta...

Page 35: ...DISPOSAL Page 31 DISPOSAL Contact your state environmental agency for details on disposal of electrical components and packaging in your particular area ...

Page 36: ...gainst dirt and moisture 4 Store in an upright position INSPECTION DURING STORAGE Routine scheduled inspection is necessary if storage is for an extended period The unit should be checked for condensation moisture corrosion and vermin Prior to installation the circuit breaker should be carefully examined for evidence of physical damage corrosion or other deterioration Refer to the PRE ENERGIZATION...

Page 37: ... 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 ML Types Rated Voltage kV rms 7 2 4 8 Rated Low Frequency Withstand Voltage kV rms 22 Impulse Withstand Voltage kV crest 60 Rated Continuous Current A rms 630 Rated Frequency Hz 50 60 Rated Short Circuit Breaking Current kA rms 14 16 Rated Short Circuit Making Curren...

Page 38: ...IVE REMEDY OF THE PURCHASER ITS CUSTOMERS AND USERS OF THE EQUIPMENT AND PARTS FOR BREACH OF THE FOREGOING WARRANTY THE COMPANY WILL HAVE NO OBLIGATIONS TO DISASSEMBLE ANY EQUIPMENT OR PART WHICH IS DEFECTIVE WITHIN THE TERMS OF THE ABOVE WARRANTY OR TO INSTALL ANY REPAIRED OR REPLACEMENT PART OR EQUIPMENT OR TO PAY ANY COSTS INCURRED IN CONNECTION WITH ANY SUCH DISASSEMBLY OR INSTALLATION THE COM...

Page 39: ...TOSHIBA TOSHIBA INTERNATIONAL CORPORATION 13131 W Little York Road Houston TX 77041 U S A Tel 713 466 0277Fax 713 466 8773 ...

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