Figure 124: Aided Delta Por Scheme - GE MiCOM P40 Agile Technical Manual

Single breaker current differential (with distance)

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Figure 124: Aided Delta POR scheme

AIDED DELTA BLOCKING SCHEME

The signalling channel is keyed from operation of the Delta Reverse elements. If the remote device has detected

Delta Forward, it operates after the trip delay if no block is received.

The logic is:

Send logic: Key channel if a Delta Fault Reverse condition is detected

Trip logic: Trip if a Delta Fault Forward condition is detected, AND a keyed channel signal is NOT received,

before the Aided Delta Delay timer expires.

This scheme is shown in the figure below.

P54x1i-TM-EN-1

Chapter 8 - Carrier Aided Schemes

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