Siemens 38-3AH3 38 kV instruction manual Maintenance and troubleshooting

Closing spring will not automatically charge.

1.

Secondary control circuit is de-energized or

control circuit fuses are blown. Check and

energize or replace if necessary.

2.

Secondary disconnect contacts 15 or 16 are

not engaging. Check and replace if required.

3.

Damage to wiring, terminals or connectors.

Check and repair as necessary.

4.

Failure of charging motor (88.0). Replace if

required.

5.

Motor cut-off switch LS21 or LS22 fails to

operate. Replace if necessary.

6.

Mechanical failure of operating mechanism.

Check and contact regional service centers,

the factory or telephone Siemens field

service at +1 (800) 347-6659 or +1 (919)

365-2200 outside the U.S.

Closing springs

Closing coil or solenoid

1.

Secondary control circuit de-energized or

charge, but circuit

(52SRC) fails to

control circuit fuses blown. Correct as

breaker does not close.

energize. No sound of

indicated.

circuit breaker closing.

2.

No closing signal to secondary disconnect

pin 13. Check for continuity and correct

protective relay logic.

3.

Secondary disconnect contacts 13 or 15 are

not engaging. Check and correct as

required.

4.

Failure of anti-pump relay (52Y) contacts 21

to 22, 31 to 32 or 13 to 14. Check and

replace as required.

5.

Failure of close coil (solenoid) (52SRC).

Check and replace as required.

6.

Auxiliary switch NC contacts 41 to 42 are

open when circuit breaker contacts are

open. Check linkage and switch. Replace or

adjust as necessary.

7.

Spring-charged switch LS9 NO contacts

remain open after springs are charged.

Check and replace as required.

Closing coil energizes.

1.

Mechanical failure of operating mechanism.

Sound of circuit

Check and contact regional service centers,

breaker closing is heard

the factory or telephone Siemens field

but circuit breaker

service at +1 (800) 347-6659 or +1 (919)

contacts do not close.

365-2200 outside the U.S.