2-8 750/760 Feeder Management Relay GE Multilin
2.2 SPECIFICATIONS 2 INTRODUCTION
2
PHASE / NEUTRAL / GROUND / NEG SEQ IOC
Pickup level: 0.05 to 20.00 × CT in steps of 0.01
Dropout level: 97 to 98% of pickup
Time delay: 0.00 to 600.00 s in steps of 0.01
Level accuracy: per phase / neutral / ground current input
(I
2
is 3 × phase input error)
Timing accuracy at 0 ms time delay (no intentional delay):
relay contacts = 50 ms max.
solid state output = 45 ms max.
Timing accuracy at non-zero time delay:
delay accuracy = 0 to 20 ms
Phases: Any one, any two, or all three (program-
mable) phases must operate for output
(not for I
2
)
SENSITIVE GROUND IOC
Pickup level: 0.005 to 1.000 × CT in steps of 0.00
Dropout level: 97 to 98% of pickup
Time delay: 0.00 to 600.00 s in steps of 0.01
Level accuracy: per phase / neutral / ground current input
(I
2
is 3 × phase input error)
Timing accuracy at 0 ms time delay (no intentional delay):
relay contacts = 50 ms max.
solid state output = 45 ms max.
Timing accuracy at non-zero time delay:
delay accuracy = 0 to 20 ms
Phases: Any one, any two, or all three (program-
mable) phases must operate for output
(not for I
2
)
PHASE DIRECTIONAL
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
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
GROUND / SENSITIVE GROUND DIRECTIONAL
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
BUS / LINE UNDERVOLTAGE
Minimum voltage: > programmable threshold from 0.00 to
1.25 × VT in steps of 0.01
Pickup level: 0.00 to 1.25 × VT in steps of 0.01
Dropout level: 102 to 103% of pickup
Curve: Definite Time or Inverse Time
Time delay: 0.0 to 6000.0 s in steps of 0.1
Phases: Any one, any two, or all three (program-
mable) phases must operate for output
(Bus Undervoltage only)
Level accuracy: per voltage input
Timing accuracy: ±100 ms
OVERVOLTAGE
Pickup level: 0.00 to 1.25 × VT in steps of 0.01
Dropout level: 97 to 98% of pickup
Time delay: 0.0 to 6000.0 s in steps of 0.1
(Definite Time)
Phases: Any one, any two, or all three (program-
mable) phases must operate for output
Level accuracy: per voltage input
Timing accuracy: ±100 ms
NEGATIVE SEQUENCE VOLTAGE
Pickup level: 0.00 to 1.25 × VT in steps of 0.01
Dropout level: 97 to 98% of pickup
Time delay: 0 to 6000.0 s in steps of 0.1
(Definite Time or Inverse Time)
Level accuracy: 3 × voltage input error
Timing accuracy: ±100 ms
UNDERFREQUENCY
Minimum voltage: 0.00 to 1.25 × VT in steps of 0.01 in
Phase A
Pickup level: 20.00 to 65.00 Hz in steps of 0.01
Dropout level: Pickup + 0.03 Hz
Time delay: 0 to 600.00 s in steps of 0.01
(Definite Time)
Level accuracy: ±0.02 Hz
Timing accuracy: ±25 ms at 60 Hz; ±30 ms at 50 Hz
BREAKER FAILURE
Pickup level: 0.05 to 20.0 × CT in steps of 0.01
Dropout level: 97 to 98% of pickup
Time delay: 0.03 to 1.00 s in steps of 10
Timing accuracy: ±20 ms error
Level accuracy: per CT input
NEUTRAL DISPLACEMENT
Pickup level: 0.00 to 1.25 × VT in steps of 0.01
Dropout level: 97 to 98% of pickup
Curve shapes: ANSI Extremely/Very/Moderately/Nor-
mally 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: 3 × voltage input error
Timing accuracy: ±50 ms
NOTE
NOTE
Courtesy of NationalSwitchgear.com
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