GE G60 Instruction Manual page 38
Ur series generator management relay
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2.2 SPECIFICATIONS
STATOR DIFFERENTIAL
Pickup:
Slope 1 and 2:
Break 1:
Break 2:
RESTRICTED GROUND FAULT
Pickup:
2
Dropout:
Slope:
Pickup delay:
Dropout delay:
Operate time:
PHASE/NEUTRAL/GROUND TOC
Current:
Pickup level:
Dropout level:
Level accuracy:
for 0.1 to 2.0 × CT:
for > 2.0 × CT:
Curve shapes:
Curve multiplier:
Reset type:
Timing accuracy:
PHASE/NEUTRAL/GROUND IOC
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0 × CT rating: ±0.5% of reading or ±0.4% of rated
> 2.0 × CT rating
Overreach:
Pickup delay:
Reset delay:
Operate time:
Timing accuracy:
2-8
0.050 to 1.00 pu in steps of 0.01
1 to 100% in steps of 1
1.00 to 1.50 pu in steps of 0.01
1.50 to 30.00 pu in steps of 0.01
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
0 to 100% in steps of 1%
0 to 600.00 s in steps of 0.01
0 to 600.00 s in steps of 0.01
<1 power system cycle
Phasor or RMS
0.000 to 30.000 pu in steps of 0.001
97% to 98% of pickup
±0.5% of reading or ±0.4% of rated
(whichever is greater)
±1.5% of reading > 2.0 × CT rating
IEEE Moderately/Very/Extremely
Inverse; IEC (and BS) A/B/C and Short
Inverse; GE IAC Inverse, Short/Very/
2
Extremely Inverse; I
t; FlexCurves™
(programmable); Definite Time (0.01 s
base curve)
Time Dial = 0.00 to 600.00 in steps of
0.01
Instantaneous/Timed (per IEEE)
Operate at > 1.03 × actual pickup
±3.5% of operate time or ±½ cycle
(whichever is greater)
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
(whichever is greater)
±1.5% of reading
<2%
0.00 to 600.00 s in steps of 0.01
0.00 to 600.00 s in steps of 0.01
<16 ms at 3 × pickup at 60 Hz
(Phase/Ground IOC)
<20 ms at 3 × pickup at 60 Hz
(Neutral IOC)
Operate at 1.5 × pickup
±3% or ±4 ms (whichever is greater)
G60 Generator Management Relay
2 PRODUCT DESCRIPTION
PHASE DIRECTIONAL OVERCURRENT
°
Relay connection:
90
(quadrature)
Quadrature voltage:
ABC phase seq.: phase A (V
), phase B (V
BC
ACB phase seq.: phase A (V
), phase B (V
CB
Polarizing voltage threshold: 0.000 to 3.000 pu in steps of 0.001
Current sensitivity threshold: 0.05 pu
Characteristic angle:
0 to 359
Angle accuracy:
±2°
Operation time (FlexLogic™ operands):
Tripping (reverse load, forward fault):< 12 ms, typically
Blocking (forward load, reverse fault):< 8 ms, typically
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality:
Co-existing forward and reverse
Polarizing:
Voltage, Current, Dual
Polarizing voltage:
V_0 or VX
Polarizing current:
IG
Operating current:
I_0
Level sensing:
3 × (|I_0| – K × |I_1|), IG
Restraint, K:
0.000 to 0.500 in steps of 0.001
Characteristic angle:
–90 to 90° in steps of 1
Limit angle:
40 to 90° in steps of 1, independent for
forward and reverse
Angle accuracy:
±2°
Offset impedance:
0.00 to 250.00 Ω in steps of 0.01
Pickup level:
0.002 to 30.000 pu in steps of 0.01
Dropout level:
97 to 98%
< 16 ms at 3 × pickup at 60 Hz
Operation time:
NEGATIVE SEQUENCE DIRECTIONAL OC
Directionality:
Co-existing forward and reverse
Polarizing:
Voltage
Polarizing voltage:
V_2
Operating current:
I_2
Level sensing:
Zero-sequence:
|I_0| – K × |I_1|
|I_2| – K × |I_1|
Negative-sequence:
Restraint, K:
0.000 to 0.500 in steps of 0.001
Characteristic angle:
0 to 90° in steps of 1
Limit angle:
40 to 90° in steps of 1, independent for
forward and reverse
Angle accuracy:
±2°
0.00 to 250.00 Ω in steps of 0.01
Offset impedance:
Pickup level:
0.05 to 30.00 pu in steps of 0.01
Dropout level:
97 to 98%
Operation time:
< 16 ms at 3 × pickup at 60 Hz
), phase C (V
)
CA
AB
), phase C (V
)
AC
BA
°
in steps of 1
GE Multilin
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