FUNCTION CHARACTERISTICS
40
NA011 - Manual - 05 - 2022
4.5 CONTROL AND MONITORING
Circuit breaker supervision
Preface
By means 52a and/or 52b auxiliary contacts, the CB position is acquired; based on this information a
Open and/or Close can be sent safely issued by user.
For detecting the CB position one or two binary input (52a or 52b) can be used.
For detecting the CB wrong congruity two input (52a and 52b) must be used.
To activate the Auto-reclose function the CB state acquisition must be enabled.
Operation and settings
52a is the auxiliary contact in the breaker that is in the same position as the breaker (52a open = CB
open). It must be assigned to the IN2 binary input.
52b is the auxiliary contact in the breaker that is in the opposite position as the breaker (52b open =
CB closed)). It must be assigned to the IN1 binary input.
Circuit breaker commands
By means of the
(Open) and
(Close) keys the circuit breaker command may be issued.
The committed output relays must be enabled inside the Set \ Relays menu.
Fun-CB-position.ai
RELAYS TRIPPING MATRIX
LED 3, 4
52a ON/OFF
0T
CB check
52b ON/OFF
52a
52
52b
+UAUX
-UAUX
IN2
IN1
=1
Logic diagram concerning the Circuit Breaker monitoring
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