GE 750 - Block Overcurrent Functions; Description; Settings

GE Power Management 750/760 Feeder Management Relay 10-
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10 S3 LOGIC INPUTS 10.7 BLOCK OVERCURRENT FUNCTIONS
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10.7 BLOCK OVERCURRENT FUNCTIONS 10.7.1 DESCRIPTION
The following logic input functions allow overcurrent protection elements to be blocked. Overcurrent elements
will NOT detect faults, send messages, or illuminate indicators when blocked. These functions can be used to:
• Block overcurrent operation from downstream relays for selective tripping schemes from external direc-
tional current/power or any other supervision.
• Block overcurrent operation during initial feeder loading when the inrush currents are not yet known.
• Block neutral operation during single-phase switching, or during fault burn-off attempts.
• Block timed phase and neutral operation during deliberate emergency overload operating situations.
10.7.2 SETTINGS
■ BLK OC FUNCTIONS
■ [ENTER] for more
The Block Overcurrent Functions setpoints path is:
\ SETPOINTS \ S3 LOGIC INPUTS \ BLOCK OC FUNCTIONS
BLOCK ALL OC:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks all overcurrent elements.
BLOCK PHASE OC:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks all phase overcurrent elements.
BLOCK NEUTRAL OC:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks all neutral overcurrent elements.
BLOCK GROUND OC:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks all ground overcurrent elements.
BLOCK SENSTV GND OC:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks all sensitive ground overcurrent elements.
BLOCK PHASE TIME 1:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the phase time overcurrent 1 element.
BLOCK PHASE TIME 2:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the phase time overcurrent 2 element.
BLOCK PHASE INST 1:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the phase instantaneous 1 overcurrent element.
BLOCK PHASE INST 2:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the phase instantaneous 2 overcurrent element.
BLOCK NEUTRL TIME 1:
DECAY: Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the neutral time overcurrent 1 element.
BLOCK NEUTRL TIME 2:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the neutral time overcurrent 2 element.
BLOCK NEUTRL INST 1:
Disabled
Range: Disabled, Input 1, Input 2, ..., Input 20
Blocks the neutral instantaneous 1 overcurrent element.