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5.2 CIRCUIT BREAKER OPEN LOGIC

The Circuit Breaker Open logic module produces internal signals indicating the open status of one or more phases.

These signals ar

e used by some of the Autoreclose logic modules.

5.2.1 CIRCUIT BREAKER OPEN LOGIC DIAGRAM

V03389

CB Open 3 ph

CB Open B ph

CB Open C ph

CB Open A ph

CB1Op1P

CB1OpAny

CB1Op2/3P1

³2

Figure 58: Circuit Breaker Open logic diagram (Module 3)

5.3 CIRCUIT BREAKER IN SERVICE LOGIC

For Autoreclose to proceed, a circuit breaker has to be in service when the Autoreclose is initiated. A circuit breaker

is consider

ed to be in service if it has been closed for more than the CB IS Time setting.

For applications with fast-acting circuit breaker auxiliary switches, a time delay setting CB IS Memory Time is

provided. This is used to ensure correct operation if a delay between the circuit breaker tripping and recognition by

the protection, is expected.

When an Autoreclose cycle starts, the “in service” signal for a circuit breaker stays set until the Autoreclose cycle

finishes.

The circuit breaker “in service” signal resets if the circuit breaker opens, or if the corresponding Autoreclose in

progress (ARIP) signal resets.

5.3.1 CIRCUIT BREAKER IN SERVICE LOGIC DIAGRAM

A/R Lockout

CB Closed 3 ph

CB1CRLO

V03302

CBIST

CBISMT

CB In Service

Logic 1

CB ARIP

Figure 59: CB In Service logic diagram (Module 4)

P54A/B/C/E Chapter 7 - Autoreclose

P54xMED-TM-EN-1 149

GE P54C User Manual

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