Why Siemens SDV6 experience nuisance or false trips?
Nuisance or false trips in Siemens Circuit breakers can be due to: * An electrical problem where a tripping signal remains energized on XOC2. * Improper protective relay logic. Correct as required.
What causes nuisance or false close in Siemens SDV6 Circuit breakers?
A nuisance or false close in Siemens Circuit breakers can be caused by: 1. An electrical problem, such as a nuisance or false closing signal to XOA2. Check protective relay logic and correct as required. 2. The closing coil (52SRC) terminal A2 being shorted-to-ground. Check to determine if problems are in wiring or coil and correct as required.
What to do if Siemens Circuit breaker will not trip?
If your Siemens Circuit breaker won't trip, here's what you can check: * Ensure the secondary control power is energized and the control power fuses are intact, correcting any issues found. * Inspect wiring, terminals, and connectors for damage, repairing as needed. * Check for a tripping signal to XOC2, ensuring continuity and correct protective relay logic. * Verify that secondary disconnect contacts 1 or 2 are engaging, replacing them if required. * Examine the trip coil (52T) for failure, replacing it if necessary. * Confirm that auxiliary switch NO contacts 23 to 24 or 33 to 34 are closed when the circuit breaker is closed, adjusting or replacing the linkage and switch as needed.
General| Brand | Siemens |
|---|---|
| Model | SDV6 |
| Category | Circuit breakers |
| Language | English |
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