T5000 Paralleling Relay block diagram

The T5000 Paralleling Relay is a check synchronizer, inhibiting closure of circuit breaker if synchronizing parameters such as voltage, frequency and phase angle are outside limits, thus preventing generator damage and disturbance to the busbar. The T5000 can also be used as synchronizing aid for manual or automatic synchronization where voltage and frequency are adjusted by the operator to roughly the values required, and the unit will provide a closing signal to the circuit breaker at phase accordance.

Automatic closure
In order to use the T5000 with automatic closure, terminals 19 and 20 should be interconnected, and the T5000 will now operate as illustrated in graph at left. Line I shows the closing signal directly from the T5000. Line II shows the main contact closure with an additional circuit breaker operation time of 50 msec.

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