Figure 199: Circuit Breaker Trip Time Monitoring Logic Diagram (Module 53) - GE MiCOM P40 Agile Technical Manual

P543i/P545i
5.17 CIRCUIT BREAKER TRIP TIME MONITORING
The circuit breaker trip time monitoring logic checks for correct circuit breaker tripping following the issue of a
protection trip signal. When the protection trip signal is issued, a timer controlled by the Trip Pulse Time setting in
the CB CONTROL column is started.
If the circuit breaker trips correctly the timer resets. If Autoreclose is enabled and the timer resets, the cycle
continues. If the circuit breaker fails to trip correctly within the set time, the Autoreclose cycle is forced to lock out
and a signal is issued indicating that the circuit breaker failed to trip in response to the protection operation.
5.17.1 CB TRIP TIME MONITORING LOGIC DIAGRAM
Trip Pulse Time
TAR2/3Ph
CB Open 3 Ph
CB Closed 3 Ph
Trip Pulse Time
TARA
TMEM2/3Ph
CB Open 3 Ph
CB Closed 3 Ph
TARB
TMEM2/3Ph
CB Open 3 Ph
CB Closed 3 Ph
TARC
TMEM2/3Ph
CB Open 3 Ph
CB Closed 3 Ph
V03376

Figure 199: Circuit Breaker Trip Time Monitoring logic diagram (Module 53)

5.18 AUTORECLOSE LOCKOUT
A number of events will cause Autoreclose lockout. If this happens an Autoreclose lockout alarm is raised. In this
condition, Autoreclose cannot be initiated until the corresponding lockout has been reset.
The following events force Autoreclose lockout:
Protection operation during reclaim time. Following the final Autoreclose attempt, if the protection operates
●
during the reclaim time, the AR cycle goes to AR lockout and the Autoreclose function is disabled until the
AR lockout condition is reset.
Persistent fault. A fault is considered persistent if the protection re-operates after the last permitted shot.
●
● Block Autoreclose. If the block Autoreclose DDB is asserted whilst Autoreclose is in progress, the cycle goes
to lockout.
Protection function selection. Setting 'Block AR' against a particular protection function in the AUTORECLOSE
●
column means that operation of the protection will block Autoreclose and force lockout.
P54x1i-TM-EN-1
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Chapter 11 - Autoreclose
1 CB Fail Pr Trip
339