CHAPTER 5: SETTINGS GROUPED ELEMENTSL60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 5-2595BF1 PH A INITIATE / BF1 PH B INITIATE / BF 1 PH C INITIATE — These settings select the FlexLogic operand to initiate phase A, B,or C single-pole tripping of the breaker and the phase A, B, or C portion of the scheme, accordingly. This setting is only validfor single-pole breaker failure schemes.BF1 BKR POS1 φB / BF1 BKR POS 1 φC — These settings select the FlexLogic operand to represents the protected breakerearly-type auxiliary switch contact on poles B or C, accordingly. This contact is normally a non-multiplied Form-A contact.The contact can even be adjusted to have the shortest possible operating time. This setting is valid only for single-polebreaker failure schemes.BF1 BKR POS2 φB — Selects the FlexLogic operand that represents the protected breaker normal-type auxiliary switchcontact on pole B (52/a). This can be a multiplied contact. This setting is valid only for single-pole breaker failure schemes.BF1 BKR POS2 φC — This setting selects the FlexLogic operand that represents the protected breaker normal-type auxiliaryswitch contact on pole C (52/a). This can be a multiplied contact. For single-pole operation, the scheme has the sameoverall general concept except that it provides re-tripping of each single pole of the protected breaker. The approachshown in the following single pole tripping diagram uses the initiating information to determine which pole is supposed totrip. The logic is segregated on a per-pole basis. The overcurrent detectors have ganged settings. This setting is valid onlyfor single-pole breaker failure schemes.Upon operation of the breaker failure element for a single pole trip command, a three-pole trip command needs to begiven via output operand BKR FAIL 1 TRIP OP.
