Circuit Breaker Arcing Management - GE D90 Plus Instruction Manual

CIRCUIT BREAKER ARCING MANAGEMENT

Circuit breaker arcing management
494
Figure 428: Equipment manager block diagram
The breaker arcing management function indicates the condition of the circuit breaker
interrupter. The primary function is measurement of accumulated contact wear. This is
accomplished by integrating the current passing through the breaker during interruption.
The function compares the accumulated arcing current with manufacturer data to provide
an indication that the breaker requires maintenance. The function also measures the total
clearing time, and the maximum interrupted current. This latter value is compared with
manufacturer data to determine if the interrupt rating of the breaker has been exceeded.
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D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 9: EQUIPMENT MANAGER