GE C60 Instruction Manual page 116

5.5 GROUPED ELEMENTS
BF1 USE TIMER 3:
If set to Yes, the Slow Path is operational.
BF1 TIMER 3 PICKUP DELAY:
Timer 3 is set to the same interval as Timer 2, plus an increased safety margin. Because this path is intended to operate
only for low level faults, the delay can be in the order of 300 to 500 ms.
φ
BF1 BKR POS1 A/3P:
This setting selects the FlexLogic™ operand that represents the protected breaker early-type auxiliary switch contact (52/
a). When using 1-Pole breaker failure scheme, this operand represents the protected breaker early-type auxiliary switch
contact on pole A. This is normally a non-multiplied Form-A contact. The contact may even be adjusted to have the shortest
possible operating time.
φ
BF1 BKR POS2 A/3P:
This setting selects the FlexLogic™ operand that represents the breaker normal-type auxiliary switch contact (52/a). When
using 1-Pole breaker failure scheme, this operand represents the protected breaker auxiliary switch contact on pole A. This
may be a multiplied contact.
BF1 BREAKER TEST ON:
This setting is used to select the FlexLogic™ operand that represents the breaker In-Service/Out-of-Service switch set to
the Out-of-Service position.
BF1 PH AMP HISET PICKUP:
This setting is used to set the phase current output supervision level. Generally this setting should detect the lowest
expected fault current on the protected breaker, before a breaker opening resistor is inserted.
5
BF1 N AMP HISET PICKUP (valid only for 3-pole breaker failure schemes):
This setting sets the neutral current output supervision level. Generally this setting should detect the lowest expected fault
current on the protected breaker, before a breaker opening resistor is inserted. Neutral current supervision is used only in
the three pole scheme to provide increased sensitivity.
BF1 PH AMP LOSET PICKUP:
This setting sets the phase current output supervision level. Generally this setting should detect the lowest expected fault
current on the protected breaker, after a breaker opening resistor is inserted (approximately 90% of the resistor current).
BF1 N AMP LOSET PICKUP (valid only for 3-pole breaker failure schemes):
This setting sets the neutral current output supervision level. Generally this setting should detect the lowest expected fault
current on the protected breaker, after a breaker opening resistor is inserted (approximately 90% of the resistor current).
BF1 LOSET TIME DELAY:
This setting is used to set the pickup delay for current detection after opening resistor insertion.
BF1 TRIP DROPOUT DELAY:
This setting is used to set the period of time for which the trip output is sealed-in. This timer must be coordinated with the
automatic reclosing scheme of the failed breaker, to which the breaker failure element sends a cancel reclosure signal.
Reclosure of a remote breaker can also be prevented by holding a Transfer Trip signal on longer than the "reclaim" time.
BF1 PH A INITIATE / BF1 PH B INITIATE / BF 1 PH C INITIATE: (only valid for 1-pole breaker failure schemes)
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.
φ
BF1 BKR POS1 B / BF1 BKR POS 1
These settings select the FlexLogic™ operand to represents the protected breaker early-type auxiliary switch contact on
poles B or C, accordingly. This contact is normally a non-multiplied Form-A contact. The contact may even be adjusted to
have the shortest possible operating time.
φ
BF1 BKR POS2 B (valid only for 1-pole breaker failure schemes):
Selects the FlexLogic™ operand that represents the protected breaker normal-type auxiliary switch contact on pole B (52/
a). This may be a multiplied contact.
5-52
φ
C (valid only for 1-pole breaker failure schemes):
C60 Breaker Management Relay
5 SETTINGS
GE Multilin