5.20 POLE DISCREPANCY
In a three-pole CB, certain combinations of poles open and closed are indicative of a problem. The Pole
Discr
epancy Logic combines an indication of a Pole Discrepancy condition from the CB Monitoring logic with
signals from the internal Autoreclose logic to produce a combined Pole Discrepancy indication for the CB.
5.20.1 POLE DISCREPANCY LOGIC DIAGRAM
V03384
0
0.04
A/R Lockout
Lockout Alarm
Pol Disc Ext
AR 1pole in prog
CB Open A ph
CB Open B ph
CB Open C ph
&
1
&
1
Pole Discrepancy
&
Figure 87: Pole Discrepancy Logic Diagram (Module 62)
5.21 CIRCUIT BREAKER TRIP CONVERSION
Circuit breakers should only trip single-pole or three-pole. The trip conversion logic ensures that the tripping is
either single-pole or thr
ee-pole. The trip conversion logic ensures that all conditions that should cause three-pole
tripping do so. Indication of the number of phases that caused tripping is provided.
Chapter 7 - Autoreclose P54A/B/C/E
172 P54xMED-TM-EN-1
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