Circuit Breaker Open Logic; Circuit Breaker Open Logic Diagram; Circuit Breaker In Service Logic; Circuit Breaker In Service Logic Diagram - GE P4A Technical Manual

P54A/B/C/E
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 are used by some of the Autoreclose logic modules.
5.2.1

CIRCUIT BREAKER OPEN LOGIC DIAGRAM

CB Open A ph
CB Open B ph
CB Open C ph
CB Open 3 ph
V03389

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 considered 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
CB ARIP
V03302

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

P54xMED-TM-EN-1
1
1
1
³2
CBIST
&
0
CBIST
CBISMT
Logic 1
& S
Q
R
1
Chapter 7 - Autoreclose
CB1Op1P
CB1OpAny
CB1 Op2/3P
CB1 CRLO
CB In Service
149