GE Power Management 750/760 Feeder Management Relay 1-
9
1 PRODUCT OVERVIEW 1.2 TECHNICAL SPECIFICATIONS
1
1.2.4 PROTECTION ELEMENTS
PHASE / NEUTRAL / GROUND / NEGATIVE
SEQUENCE TIME OVERCURRENT PROTECTION
Pickup Level: 0.05 to 20.00 in steps of 0.01 x CT
Dropout Level: 97 to 98% of Pickup
Curve Shape: ANSI Extremely/Very/Moderately/
Normally Inverse
Definite Time (0.1 s base curve)
IEC Curve A/B/C and Short
FlexCurveâ„¢ A/B (programmable
curves)
IAC Extreme/Very/Inverse/Short
Curve Multiplier: 0.00 to 100.00 in steps of 0.01
Reset Type: Instantaneous/Linear
Level Accuracy: Per current input (I
2
is 3 x input
error)
Timing Accuracy: at ≥ 1.03 x PU: ± 3% of trip time or
± 20 ms (whichever is greater)
SENSITIVE GROUND TIME OVERCURRENT
PROTECTION
Pickup Level: 0.005 to 1.000 in steps of 0.001 x
CT
Dropout Level: 97 to 98% of Pickup
Curve Shape: ANSI Extremely/Very/Moderately/
Normally Inverse
Definite Time (0.1 s base curve)
IEC Curve A/B/C and Short
FlexCurveâ„¢ A/B (programmable
curves)
IAC Extreme/Very/Inverse/Short
Curve Multiplier: 0.00 to 100.00 in steps of 0.01
Reset Type: Instantaneous/Linear
Level Accuracy: Per current input (I
2
is 3 x input
error)
Timing Accuracy: at ≥ 1.03 x PU: ± 3% of trip time or
± 20 ms (whichever is greater)
PHASE TIME OVERCURRENT VOLTAGE
RESTRAINT
Pickup Adjustment: Modifies pickup from 0.10 to 0.90 x
VT nominal in a fixed line relation-
ship
PHASE / NEUTRAL / GROUND / NEGATIVE
SEQUENCE INSTANTANEOUS OVERCURRENT
PROTECTION
Pickup Level: 0.05 to 20.00 in steps of 0.01 x CT
Dropout Level: 97 to 98% of Pickup
Time Delay: 0.00 to 600.00 in steps of 0.01s
Level Accuracy: Per phase / neutral / ground current
input (I
2
is 3 x phase input error)
Timing Accuracy: at 0 ms time delay (no intentional
delay): relay contacts = 50 ms max;
solid state output = 45 ms max
at non-zero time delay: delay accu-
racy = 0 to +20 ms
Phases: Any One/Any Two/All Three (pro-
grammable) phases have to operate
for output (Not for I
2
)
SENSITIVE GROUND INSTANTANEOUS
OVERCURRENT PROTECTION
Pickup Level: 0.005 to 1.000 in steps of 0.001 x
CT
Dropout Level: 97 to 98% of Pickup
Time Delay: 0.00 to 600.00 in steps of 0.01s
Level Accuracy: Per phase / neutral / ground current
input (I
2
is 3 x phase input error)
Timing Accuracy: at 0 ms time delay (no intentional
delay): relay contacts = 50 ms max;
solid state output = 45 ms max
at non-zero time delay: delay accu-
racy = 0 to +20 ms
Phases: Any One/Any Two/All Three (pro-
grammable) phases have to operate
for output (Not for I
2
)
PHASE DIRECTIONAL CONTROL
Relay Connection: 90° (quadrature)
Polarizing Voltage: Phase A: Vbc
Phase B: Vca
Phase C: Vab
MTA: 0 to 359° in steps of 1°
Angle Accuracy: ± 2°
Operation Delay: 25 to 40 ms
NEUTRAL DIRECTIONAL CONTROL
Polarized by voltage, current or both voltage and current
(For voltage element polarizing, the source VTs must be
connected in Wye).
Polarizing Voltage: –Vo
Polarizing Current: Ig
MTA: 0 to 359° in steps of 1°
Angle Accuracy: ± 2°
Operation Delay: 25 to 40 ms
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