P92x/EN FT/E11 Technical Guide
User Guide
Page 78/110 MiCOM P921-P922-P923
CB FAIL : DCBA
0000
Description : allocation of the information “CB FAIL” to the
logic equations (A and/or B and/or C and/or D).
Range : 0 or 1 for each selected equation
11.7.5 Example of configuration
The aim is :
The trip order following an overvoltage condition (tV>> for example) shall be
generated only if the circuit breaker is closed.
Settings are :
· select the logic input n°2 in the “INPUTS” sub-menu (see § 11.9) and assign to
this input the information “AUX1”, as indicated below :
INPUT 2 =
AUX1
The 52a contact can be connected to this input in order to monitor the CB state. The
associated timer “tAUX1” can be set to 0 (instantaneous information),
· select the “tAUX1” information in the “AND LOGIC EQUAT” menu and allocate
this information to the A logic equation,
· select the “tV>>” information in the “AND LOGIC EQUAT” menu and allocate
this information to the A logic equation,
· define the “Toperate” timer in the “T DELAY EQUATION” sub-menu (see below),
· allocate the result of the “A” logic equation to the trip output contact (see “TRIP
OUTPUT RLY” sub-menu).
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