42
Problem
Symptoms
Possible causes and remedies
Circuit breaker fails to close.
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 multi-pin plug contacts A1 or D16 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). 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 the factory or Siemens field service at +1
(800) 347-6659 or +1 (919) 365-2200 outside the
U.S.
Closing springs charge but
circuit breaker does not
close.
Closing coil or solenoid
(52SRC) fails to energize. No
sound of circuit breaker
closing.
1. Secondary control circuit de-energized or control
circuit fuses blown. Correct as indicated.
2. No closing signal to multi-pin plug pin A2 or contacts
A2 and B3 are not engaging. Check for continuity and
correct protective relay logic. Replace contacts if
required.
3. Failure of anti-pump relay (52Y) contacts 21 to 22, 31
to 32 or 13 to 14. Check and replace as required.
4. Failure of close coil (solenoid) (52SRC). Check and
replace as required.
5. Auxiliary switch NC contacts 41 to 42 are open when
circuit breaker contacts are open. Check linkage and
switch. Replace or adjust as necessary.
Closing coil energizes. Sound
of circuit breaker closing is
heard, but circuit breaker
contacts do not close.
1. Mechanical failure of operating mechanism. Check
and contact the factory or Siemens field service at +1
(800) 347-6659 or +1 (919) 365-2200 outside the
U.S.
Table 8: Troubleshooting
Summary of Contents for 3AH35-SE Series
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