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Goals and Symptoms
This document helps explain the trip circuit supervision function for the Sepam relay, talks about different types of alarms and also explains implementation and operation of this function.
Causes and Fixes
|Trip circuit supervision||
|In the event of a break in the circuit, Sepam relay indicates the fault by:
Implementation and operation.
|In order for the trip circuit supervision function to be implemented, Sepam relay and the circuit breaker must be wired according to the wiring diagram in the "Control and monitoring functions" chapter of the Sepam relay technical manual.
This diagram provides the data necessary for the operation of the Sepam relay unit's internal logic, which performs the following two vital functions at the same time:
- trip circuit supervision
- detection of the circuit breaker position
It uses 2 Sepam inputs and two circuit breaker position/status (52a & 52b) contacts which, in normal operation, are in complementary positions.
Sepam relay's internal logic continuously checks that the data on the 2 contacts are, in fact, complementary.
If this is not the case, Sepam relay indicates it, signifying:
- a break in the trip circuit
- or erroneous data concerning the detection of the circuit breaker position.
The consequence may be a failure to trip or incorrect operation of a process that uses the circuit breaker position. It is therefore necessary to check the wiring.
||The Circuit Trip is related to the CB control logic features. It indicates that the Input I11 or input I12 on Sepam is not receiving a signal. If you are not using a Circuit Breaker control logic the recommendation is not to use this function|
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