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Page 20

MAINTENANCE

Table 2 – Check Points for Periodic Inspection (cont.)

Check Point

Check Item

Check Method

Criteria

What to do

Insulation

Resistance

Measurement

Resistance from

main circuit to

ground

Measure insulation

resistance between

phases, between

electrodes, and

between circuits and

ground. Megger test

at 1000V.

Resistance should be

50M

Ω

or greater.

If the insulation

resistance is low, wipe

off the vacuum

interrupter and other

insulation surfaces

with a clean dry cloth

and then repeat the

test. If necessary,

replace faulty parts.

Resistance from

control circuits to

ground

Measure insulation

resistance between

circuits and ground.

Megger test at 500V.

Resistance should be

Ω

or greater.

Dielectric

Strength

Measure main

circuit

Measure dielectric

strength between

phases and between

circuits and ground.

14kV AC or 19.8kV DC

for 1 minute

If breakdown occurs,

contact Toshiba.

Open/Close

Operation

----

Perform open/close

operation by electric

operation test to

confirm the correct

operation.

----

If not normal, check

and repair. If

necessary, replace

faulty parts.

Table 3 - Gap/Wipe Standard Values (contactor in new condition)

Location

Type

Gap (mm) Wipe (mm) Allowable Wear

Remaining Overtravel

Vacuum

Interrupter

Magnetically Held

4.0-4.2

≥

2.3

1.7 mm

----

Mechanically Latched

4.0-4.2

≥

2.0

1.5 mm

Auxiliary

Switch

a-contact

0.4

0.3

----

2.2

0.3 mm

b-contact

0.4

0.3

Delayed b-contact

2.5

0.3

4.5

0.5

Содержание HCV-7HA

Страница 1: ...Document VF00W104 Rev 1 INSTRUCTION MANUAL INSTALLATION OPERATION MAINTENANCE HCV 7HA Vacuum Contactor 7 2kV 400A 7 2kA HCV 7HAL Vacuum Contactor 7 2kV 400A 7 2kA Issued 3 20 Manufactured in the USA ...

Страница 2: ......

Страница 3: ...shiba address all correspondence to Field Service Department Toshiba International Corporation 13131 West Little York Road Houston Texas 77041 USA or call Tel 713 466 0277 US 800 231 1412 Canada 800 872 2192 Mexico 01 800 527 1204 Please complete the following information for your records and retain with this manual Model ___________________________________ Serial Number __________________________...

Страница 4: ......

Страница 5: ...sly 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 Note The contents of this manual will not become a part of or modify the warranty policy The terms of which are set forth at the end of this manual READ SAFETY SIGNS To ...

Страница 6: ...dance 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 HCV 7HA and HCV 7HAL vacuum co...

Страница 7: ... injury 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 DANGER ...

Страница 8: ...ally Held Type 13 Figure 6 Internal Connection of the Mechanically Latched Type 13 Figure 7 Typical Control Circuit for Magnetically Held Type 14 Figure 8 Typical Control Circuit for Mechanically Latched Type 125VDC 250VDC Trip 15 Figure 9 Typical Control Circuit for Mechanically Latched Type 24VDC 48VDC Trip 16 MAINTENANCE 17 Maintenance Program 17 Maintenance Record 17 Servicing Equipment 17 Rec...

Страница 9: ...TENTS Page 5 Table 4 Recommended Part Replacement Intervals 23 Figure 13 Capacitor Switching Life 23 STORAGE AND DISPOSAL 24 Storage 24 Inspection During Storage 24 Disposal 24 SPECIFICATIONS 25 Table 5 Ratings 25 ...

Страница 10: ...tain 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 major components and how they function plus rating information RECEIVING INSPECTION AND HANDLING Describes procedures for receiving un...

Страница 11: ...n Off Indicator Located on the front right side of the contactor Indicates if the contactor is OFF Green or ON Red When the indicator reads OFF the main contacts of the contactor are open When the indication is ON the main contacts are closed Front view Back view Front view Latched type 1 Insulating frame 2 Vacuum bottle 3 Insulating flange 4 Auxiliary switch 5 Drive unit 6 Armature 7 Stopper 8 On...

Страница 12: ...t sufficiently to check for missing parts or concealed damage 3 Check for the presence of accessories that are shipped with the contactor Contactor wear gauge Figure 2 4 Keep the contactor upright Never lay the contactor on its side or upside down This may cause damage File a claim with the carrier for any damaged or missing items and immediately notify the nearest Toshiba representative Do not in...

Страница 13: ... flat horizontal surface If there are any noticeable gaps between the contactor and the mounting surface fill them in using flat washers as spacers Fasten the contactor using four 4 M8 hex head bolts The tightening torque should be 120 150 kgf cm 9 11 ft lb See Table 1 for tightening torque specifications MAIN CIRCUIT CABLE CONNECTIONS Route cables that connect to the contactor to avoid interferen...

Страница 14: ...g Cables should be dressed and terminated as appropriate to the voltage class and cable manufacturer s recommendations Either AC or DC control supply voltage may be connected to the drive unit for operation of the closing coils The optional latched trip circuit uses DC as standard power The standard control voltage for the closing coils is 120Vac Other voltages may be used provided the switch on t...

Страница 15: ...rs if removed Check for any loose connections and confirm that all wiring is correct per wiring diagrams 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 test should be performed to verify tha...

Страница 16: ... HCV 7HA with a mechanical latch assembly installed This is a Mechanically Latched type of contactor The added latch assembly contains a DC rated trip coil and an auxiliary switch with one delayed b contact and an a contact with magnetic a blowout For 24VDC 48VDC trip an RC surge suppressor is supplied separately for external installation across the a contact with the magnetic blowout See figures ...

Страница 17: ...ype LEGEND CC Closing Coil 1 2 Control Power Input Terminals 3 4 Control Switch Input Terminals 5 6 Closing Coil Terminals 7 8 No Connection LEGEND CC Closing Coil 1 2 Control Power Input Terminals 3 4 Control Switch Input Terminals 5 6 Closing Coil Terminals 7 11 Trip Coil External Connection DC 8 No Connection 16 26 Delayed b Contact ...

Страница 18: ...Magnetically Held Type LEGEND PR Protection Relay PB1 Stop Pushbutton ES Emergency Stop PB2 Start Pushbutton MR Master Relay GL Green Indicator Light RL Red Indicator Light M Vacuum Contactor M a Aux a Contact M b Aux b Contact DU Drive Unit CC Close Coils ...

Страница 19: ...25 250VDC TRIP LEGEND PR Protection Relay ES Emergency Stop PB1 Stop Pushbutton TRP Trip Relay PB2 Start Pushbutton MR Master Relay GL Green Indicator Light RL Red Indicator Light M Vacuum Contactor M a Aux a Contact M b Aux b Contact DU Drive Unit CC Close Coils TC Trip Coil D Diode ...

Страница 20: ...R Protection Relay ES Emergency Stop PB1 Stop Pushbutton TRP Trip Relay PB2 Start Pushbutton MR Master Relay GL Green Indicator Light RL Red Indicator Light M Vacuum Contactor M a Aux a Contact M b Aux b Contact DU Drive Unit CC Close Coils TC Trip Coil D Diode SS Surge Suppressor C Capacitor TC Resistor ...

Страница 21: ...s to 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 ad...

Страница 22: ...mponents Inspection Frequency Once every 6 months 3 Periodic Inspection Inspection is performed with the contactor de energized The lubrication of sliding and rotating parts is checked and the mechanism is lubricated if needed Inspection Frequency Once every 1 2 years or every 20 000 operations normal NOTE Refer to Table 2 for the schedule of Periodic Inspections 4 Unscheduled Inspection Inspectio...

Страница 23: ...ure there is no discoloration or loose fasteners Check the cause and repair Tighten connections to the contactor See Table 1 for tightening torque specifications Loose bolts nuts or screws Tighten using a wrench Make sure all bolts nuts and screws are tight See Table 1 for tightening torque specifications Vacuum contact wear See Electrical Service Life Page 23 Check contact wear and wipe If wipe i...

Страница 24: ...lation resistance between circuits and ground Megger test at 500V Resistance should be 1MΩ or greater Dielectric Strength Measure main circuit Measure dielectric strength between phases and between circuits and ground 14kV AC or 19 8kV DC for 1 minute If breakdown occurs contact Toshiba Open Close Operation Perform open close operation by electric operation test to confirm the correct operation If...

Страница 25: ...ed 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 however it is recommended that all personnel keep at least 1 meter 3 3 ft away from the vacuum contactor while this test is performed Radiation exposure hazard X rays may cause illness or injury Stay at least 1 meter 3 3 ft away ...

Страница 26: ...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 contactor 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 14kV DC The test duration for DC tests and the criteria for acceptance...

Страница 27: ...rupters is 250 000 operations For the components in Table 4 replacement or detailed inspection and cleaning are recommended after the indicated number of operations Figure 12 Wipe Measurement SERVICE LIFE CAPACITOR SWITCHING Switching of capacitor loads produces severe conditions for contactors such as high frequency inrush current and phase to phase recovery voltage more than twice the normal vol...

Страница 28: ...N 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 contactor should be carefully examined for evidence of physical damage corrosion or other deterioration Refer to the PRE ENERGIZATION Section of this manual The MAINTENANCE section of this manual describe...

Страница 29: ...Max 70 Rated Hot 60 Rated Cold Closing time msec 50 90 Opening time msec 15 40 Arcing time msec 10 Rated Trip Voltages Vdc N A 24 32 48 125 250 Minimum Trip Voltages Vdc N A 40 60 Rating Maximum Trip Current Adc N A 4 8 Method of Operation Non latched Latched Mechanical Operation Million 1 0 25 Electrical Operation Million 0 25 Auxiliary Switch 3 N O 3 N C 2 N O 2 N C Auxiliary Contact Rating 10 A...

Страница 30: ......

Страница 31: ...Transmission Distribution Division 13131 West Little York Road Houston TX 77041 Tel 713 466 0277 US 800 231 1412 CAN 800 872 2192 www toshiba com tic Printed in USA ...

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