CHAPTER 5: SETTINGS CONTROL ELEMENTS
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-369
5
OPEN POLE DETECTION — Selects the signals used to detect an open pole condition. When “I AND V AND CBaux” value is
selected, the breaker 52 contacts and the current with optional voltage signals are used to determine open pole
conditions. For the “I AND V only” selection, only the current with optional voltage signals are used.
For convenience, the position of the breaker poles defined in the breaker control feature and available as FlexLogic
operand BREAKER 1
ΦA CLSD through BREAKER 1 ΦC CLSD and BREAKER 1 OOS are used by the open pole feature if the “I AND V
AND CBaux” detection value is selected.
For correct operation of the open pole detector, the breaker control, trip output, and single-pole autoreclose features must
be enabled and configured properly. When used in configuration with only one breaker, set the
BREAKER 2 FUNCTION to
“Enabled” and the
BREAKER 2 OUT OF SV setting to “On” (see the Breaker Control section earlier in this chapter for details).
Figure 5-211: Open pole detector logic (Sheet 1 of 2)
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