Cb State Monitoring Features Diagram; Remote Control Of Circuit Breaker Diagram - GE P741 Technical Manual

P74x/EN OP/Na7
(OP) 5-40
3.3 Circuit Breaker Control
The relay includes the following options for control of a single circuit breaker:
Local tripping and closing, via the relay menu
Local tripping and closing, via relay opto-isolated inputs
It is recommended that separate relay output contacts are allocated for remote circuit
OP
breaker control and protection tripping. This enables the control outputs to be selected via a
local/remote selector switch as shown below. Where this feature is not required the same
output contact(s) can be used for both protection and remote tripping.
The following table is taken from the relay menu and shows the available settings and
commands associated with circuit breaker control.
A manual trip will be permitted provided that the circuit breaker is initially closed. Likewise, a
close command can only be issued if the CB is initially open. To confirm these states it will
FIGURE 27: CB STATE MONITORING FEATURES
FIGURE 28: REMOTE CONTROL OF CIRCUIT BREAKER
Operation
MiCOM P741, P742, P743