GE 750 User Manual

GE Power Management
750/760 Feeder Management Relay 14-
35
14 S7 CONTROL 14.8 AUTORECLOSE (760 ONLY)
14
14.8.4 AUTORECLOSE CURRENT SUPERVISION
The current supervision feature is used to limit breaker wear. When fault current exceeds user-programmed
levels, it reduces the number of reclose shots permitted.
Once a reclose sequence is initiated, the maximum current measured on any phase is compared to the set-
point current levels. The relay then determines the maximum number of shots allowed or whether the scheme
goes immediately to lockout. The lowest number of permitted shots, whether set by the
MAXIMUM NUMBER OF
RECLOSE SHOTS
setpoint or the current supervision feature, always takes precedence unless current supervi-
sion takes the scheme to lockout. Lockout has the highest priority. Once the current supervision feature has
reduced the total number of shots, a subsequent shot can still reduce the limit further.
■ CURRENT SUPERVSION
■ [ENTER] for more
The Autoreclose Current Supervision setpoints path is:
\ SETPOINTS \ S7 CONTROL \ AUTORECLOSE \ CURRENT SUPERVSION
CURRENT SUPERVISION
FUNCTION: Disabled
Range: Enabled, Disabled
Enables or disables the autoreclose current supervision scheme.
3 SHOTS FOR CURRENT
ABOVE: 17.00 x CT
Range: 0.00 to 20.00 in steps of 0.01 x CT
Selects the fault current level above which the number of autoreclose shots
will be reduced to three.
2 SHOTS FOR CURRENT
ABOVE: 18.00 x CT
Range: 0.00 to 20.00 in steps of 0.01 x CT
Selects the fault current level above which the number of autoreclose shots
will be reduced to two.
1 SHOT FOR CURRENT
ABOVE: 19.00 x CT
Range: 0.00 to 20.00 in steps of 0.01 x CT
Selects the fault current level above which the number of autoreclose shots
will be reduced to one.
CURRENT SUPERVISION
TO LOCKOUT: Disabled
Range: Enabled, Disabled
If the autoreclose scheme is to be taken directly to lockout without reclosing,
set this setpoint to Enabled.
LOCKOUT FOR CURRENT
ABOVE: 20.00 x CT
Range: 0.00 to 20.00 in steps of 0.01 x CT
Selects the fault current level above which the autoreclose scheme will go to
lockout.

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English