142
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
via push buttons are also disabled when the relay is set to remote mode, and vice
versa when the relay is in local mode, the remote control is disabled. If the breaker
is interlocked and the interlocking scheme is used with one or more digital inputs
configured to the “CLOSEENA” input signal, no close pulse will be sent from the
relay. The open and close input signals have to be selected via the
Configuration\Input Signals\ menu in the same way as for the breaker
status indication signals.
Fig. 9.1.4.2.-2 Connection diagram for the standard configuration B01 with the breaker status indication and
the control signals for opening and closing of the circuit breaker
9.1.5. Implementations
In the sections below a few implementation examples for the standard configuration
B01 are presented.
CB
REX521
1
0
0
1
TRIP circuit breaker
CLOSE circuit breaker
CBstatus
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