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Maintenance and troubleshooting
Table 7: Troubleshooting
Problem
Symptoms
Possible causes and remedies
Circuit breaker fails to close.
Closing spring will not automatically charge. | 1. | Secondary control circuit is | |
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| control circuit fuses are blown. Check and |
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| energize or replace if necessary. |
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| 2. | Secondary disconnect contacts 15 or 16 are |
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| not engaging. Check and replace if required. |
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| 3. | Damage to wiring, terminals or connectors. |
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| Check and repair as necessary. |
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| 4. | Failure of charging motor (88.0). Replace if |
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| required. |
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| 5. | Motor |
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| operate. Replace if necessary. |
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| 6. | Mechanical failure of operating mechanism. |
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| Check and contact regional service centers, |
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| the factory or telephone Siemens field |
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| service at +1 (800) |
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Closing springs | Closing coil or solenoid | 1. | Secondary control circuit |
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 |
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| pin 13. Check for continuity and correct |
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| protective relay logic. |
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| 3. | Secondary disconnect contacts 13 or 15 are |
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| not engaging. Check and correct as |
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| required. |
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| 4. | Failure of |
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| to 22, 31 to 32 or 13 to 14. Check and |
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| replace as required. |
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| 5. | Failure of close coil (solenoid) (52SRC). |
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| Check and replace as required. |
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| 6. | Auxiliary switch NC contacts 41 to 42 are |
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| open when circuit breaker contacts are |
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| open. Check linkage and switch. Replace or |
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| adjust as necessary. |
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| 7. | |
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| remain open after springs are charged. |
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| Check and replace as required. |
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| 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) |
| contacts do not close. |
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