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1.4.1 Fault finding chart

FAULT

CAUSE

REMEDY

Spring will not charge

Motor has wrong or no

Measure voltage on the

operating voltage

motor leads.

Motor shaft broken

Change motor

Motor gear damage

Change motor

The latch for tripping

Check mechanism

device does not function

NOTE: Read safety
instruction in paragraph
1.3 before taking action

Disconnection in the wires Check by measuring.

Closing of breaker does not

Operating coil does not pull Measure the voltage,

take place although there

adjust the coils adjust-

is an indication that the

ment screw.

springs are tensioned.

Check breaker springs

Breaker closes then opens

The toggle joint of the

Adjust the toggle joint

again.

mechanism are incorrectly
adjusted
Main circuit is wrong

Find fault and adjust

Wrongly adjusted
clearance of opening

Adjust

magnets armature

Breaker continuously opens

Anti-pumping relay wrong Change relay

and closes

Breaker will not close

Micro-switch arm wrongly

Find fault and adjust

completely

adjusted
Under-voltage relay

Find fault and adjust

released.

(18)

Содержание HPA 12kV

Страница 1: ...MV SF6 Indoor Circuit Breaker Model HPA 12kV 24kV 36kV 1VDU22001 YN Instruction for Installation Service and Maintenance ...

Страница 2: ...and this instruction Notice 2 Within the scope of this instruction it is impossible to take into account every possible eventuality which may arise with technical equipment in service Please consult our local agents in the event of any irregularities Especially if not referred to herein Notice 3 We expressly decline liability for any damage resulting from any incorrect operation or wrong handling ...

Страница 3: ...1 3 4 Checking for operating speed and time 16 1 4 Service instruction 17 1 4 1 Fault finding chart 18 1 4 2 Replacement of operating coils 19 1 4 3 Replacement of micro switch 20 1 4 4 Replacement of auxiliary contacts 21 1 4 5 Replacement of motor 21 1 4 6 Replacement of damping device 21 1 4 7 Replacement of operating mechanism 22 1 4 8 Changing of breaker pole 24 1 4 9 HPA operating gear adjus...

Страница 4: ...ptions at rated breaking current No 6 25 10 Mechanical endurance number of interruptions at rated current No 10000 10000 5000 With maintenance as detailed in this manual 2 2 Construction and function The circuit breaker type HPAoperator on the puffer principle 2 2 1 Breaker poles The breaker pole contains Sf gas sulphur hexafluoride This gas in many 6 respects is one of the best media for circuit ...

Страница 5: ...ed To provide an extra margin of safety the breaker is capable of interrupting its rated current at rated voltage even at atmospheric pressure The Sf breaker type HPA operates on what is usually referred to as the puffer 6 principle This involves compressing the gas between a static piston and a movable cylinder during the interruption action The compressed gas is then blown through a nozzle in wh...

Страница 6: ...at the manufacturing factory The locking screws are tightened up to a predetermined torque at the factory and must not be opened If it is assumed that moisture has entered gas pressure atmospheric 0 the pole the same should be returned to the factory for repair SF gas which has been exposed to arcs contain components which combined with 6 moisture become corrosive Filling up of gas should always b...

Страница 7: ...Fig 3b HPA breaker pole for 36 kV ...

Страница 8: ...n battery a network or via a voltage transformer with a limit load of at least 300 VA The motor starts after each closing operation and charges the closing springs within 9 seconds The breaker is fitted with a knob for mechanical openings and with magnetic coils for closing and openings The same operating mechanism is used for all types of HPAbreaker The construction of the operating mechanism is ...

Страница 9: ... 7 Fig 5 Circuit Breaker ...

Страница 10: ...sing spring IN 2192 0002 B 12 Link IN 2194 0001 AE 13 Contact will not be supplied loose 14 15 Trip free device bottom IN 5436 0001 B OPERATING MECHANISM SR NO ITEM DESCRIPTION PARTNO 1 Closing coil IN 5274 0001 A 2 Closing Damping device IN 5256 0711 4 3 Micro switch IN 5445 0744 A 4 Fixing bolts for Operating device tripping coil IN 5274 0001 A 5 Short cover IN 5428 0002 2 6 O ring IN 2152 2018 ...

Страница 11: ... the charging device starts and link 4 moves upwards until latch 2 is engaged At this point link 4 turns and begins to move downwards whereupon the upper shaft turns and retentions The closing spring position is reached according to fig 6C During the breaker opening latch 14 is released thus releasing the lower shaft which via the insulating links 7 actuates the moving contact of the breaker poles...

Страница 12: ...free mechanism cap coupling Fig 7A item J K a a a 1 4 Closing Tripping spring assembly split pin N on them fig 7A a 1 5 Bearing item P fig 7A a 1 6 Checking of setting Coupling and knife catch gap Setting 1 fig 7B Bottom TFM and CAP gap Setting 2 fig 7A both gaps should be between 1 2 mm a a a 1 7 Spring cut off micro switches a a a 02 OVERHAUL LUBRICATION OF CHARGING DEVICE AND OPERATING GEAR a 0...

Страница 13: ...Fig 7A Maintenance schedule for frequently operated breaker type HPA 1VYN400290 005 11 ...

Страница 14: ...Fig 7B Maintenance schedule for frequently operated breaker type HPA 1VYN400290 005 12 ...

Страница 15: ...Electrical endurance HPA 13 ...

Страница 16: ...C 20 C 30 C 40 C 0 5 0 47 0 48 0 50 0 52 0 54 1 0 0 93 0 97 1 00 1 03 1 06 1 5 1 40 1 45 1 50 1 55 1 60 2 0 1 36 1 93 2 00 2 07 2 14 2 5 2 33 2 41 2 50 2 59 2 68 3 0 2 80 2 90 3 00 3 10 3 20 3 5 3 26 3 42 3 50 3 62 3 74 The HPA breaker can be fitted with a density gauge with an alarm contact and indicator The green area of the indicator shows the correct pressure the yellow area indicates enough p...

Страница 17: ...2 Connect metering pressure gauge to pole 3 Read pressure compensation for temperature as shown on page 14 If reading Is between 2 0 and 2 5 disconnect gauge 4 Disconnect the operating device by disconnecting the voltage to the motor and operate by hand close and open 5 Close cylinder reducer valve 6 Close charging valve 7 Open cylinder main valve and note reading on gauge should show approx 70 ba...

Страница 18: ... Check the O ring of the covers if they are dry exchange with new ones which have been greased withABB grease IN 1171 4014 49 Note Mineral grease must not be used on EPDMO rings Replace the cover on the connection nipple 1 3 4 Checking of operating speed and time Checking of operating speed can be made with a capacitive sensor The sensor is connected to a conventional oscilloscope The curve shown ...

Страница 19: ...rve on the oscilloscope should be as shown in fig 9 5 Make a closing operation 6 If the speeds are not correct the spring force is to be adjusted See section 1 4 9 Adjustment of operating device 1 4 Service instructions Safety instructions For dismantling and servicing of breakers the following steps should be followed 1 Disconnect the breaker 2 Pull out the breaker on the door 3 Manually release ...

Страница 20: ...ating coil does not pull Measure the voltage take place although there adjust the coils adjust is an indication that the ment screw springs are tensioned Check breaker springs Breaker closes then opens The toggle joint of the Adjust the toggle joint again mechanism are incorrectly adjusted Main circuit is wrong Find fault and adjust Wrongly adjusted clearance of opening Adjust magnets armature Bre...

Страница 21: ...1 4 2 Replacement of operating coils For positioning of operating coils see fig 11A 11B The coil is fixed with 4 screws 19 Fig 11A Replacement of Trip coil auxiliary switch ...

Страница 22: ...1 4 3 Replacement of Micro Switch For positioning of micro switches see fig 12 The switches are fixed with 2 screws 20 Fig 11B Replacement of closing coil Fig 12 Replacement of Micro switch ...

Страница 23: ...ere are flat terminals for cables See fig 13 1 4 6 Replacement of Damping device When replacing the damping device the closing spring must be charged For this work the release mechanism for the spring unit must be secured see fig 14 Securing the device can be achieved with a G clamp Note For extra security both the opening and the closing springs must be fastened On one side of the damping device ...

Страница 24: ...e device from the plate No other units need to be loosened If other units are loosened there is a risk of the springs being released The lower part of the device is pulled out through a hole in the plate 5 Insert the new damping device Adjust it so that at the ON position the step of the shaft of damping device shall be in line with the damping device housing 6 Tighten the safety nuts 7 Loosen the...

Страница 25: ...3 Fixing screw and operating arm IN 2121 2016 418 4 Density gauge IN 5663 162 1 5 Nut M 45 IN 2126 0001 9 6 Nut M 27 IN 2126 0001 10 7 Screw M 12 X 20 IN 2121 0001 523 8 Breaker pole 11kV IN 5452 0002 L Breaker pole 22kV IN 5452 0002 U 9 Short cover IN 5425 0002 2 23 Fig 15 HPA Breaker with operating device breaking pole dis assembled ...

Страница 26: ...and dash pot Locate the dock point screw B on top shaft are in minimum position unlocked This is to ensure that the trip free mechanism operates safely when the spring is charged and thus preventing dummy stroke 1 Adjustment of knee joint blue gauge adjust gap 3 from centre of upper pin in push rod to a line from centre of upper shaft to the lower pin in push rod 3 5 4 5 with the help of dog point...

Страница 27: ...e the lock nuts in link E 8 Lower trip free mechanism Open the breaker and check the clearance 2 Adjust clearance 2 to 1 mm by using dog point screw B on upper arm Secure the lock nut when breaker is closed 9 Micro switches to be adjusted as per instruction IN 5452 0003 15 10 Final test Check breaker with operating circuit connected While charging at minimum operating voltage of motor the charging...

Страница 28: ... no IN 2188 0002 C Moving trolley For removal and insertion of cassette into cubicle Ordering no IN 6189 0001 A Loose tools Refilling device for SF gas for a breaker 6 without density gauge Drg No IN 5428 0001 C Refilling device for SF gas for a breaker 6 with density gauge Drg No IN 5428 0001 E Pack of washer for refilling device IN 2152 2018 1070 4nm Pressure refilling equipment with a regulator...

Страница 29: ......

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