GE Multilin g60

GE Multilin G60 Generator Protection System 2-11
2 PRODUCT DESCRIPTION 2.2 SPECIFICATIONS
2
PHASE DIRECTIONAL OVERCURRENT
Relay connection: 90° (quadrature)
Quadrature voltage: ABC phase seq.: phase A (V
BC
), phase
B (V
CA
), phase C (V
AB
); ACB phase
seq.: phase A (V
CB
), phase B (V
AC
),
phase C (V
BA
)
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
° in steps of 1
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  in steps of 0.01
Pickup level: 0.002 to 30.000 pu in steps of 0.01
Dropout level: 97 to 98%
Operation time: < 16 ms at 3  pickup at 60 Hz
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|
Negative-sequence:|I_2| – K  |I_1|
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°
Offset impedance: 0.00 to 250.00  in steps of 0.01
Pickup level: 0.015 to 30.000 pu in steps of 0.01
Dropout level: 97 to 98%
Operation time: < 16 ms at 3  pickup at 60 Hz
GENERATOR UNBALANCE
Gen. nominal current: 0.000 to 1.250 pu in steps of 0.001
Stages: 2 (I
2
t with linear reset and definite time)
Pickup level: 0.00 to 100.00% in steps of 0.01
Dropout level: 97 to 98% of pickup
Level accuracy:
0.1 to 2 x CT rating: ±0.5% of reading or 1% of rated
(whichever is greater)
> 2.0 x CT rating: ±1.5% of reading
Time dial (K-value): 0.00 to 100.00 in steps of 0.01
Pickup delay: 0.0 to 1000.0 s in steps of 0.1
Reset delay: 0.0 to 1000.0 s in steps of 0.1
Time accuracy: ±3% or ±20 ms, whichever is greater
Operate time: < 50 ms at 60 Hz
SPLIT PHASE PROTECTION
Operating quantity: split phase CT current biased by genera-
tor load current
Pickup level: 0.020 to 1.500 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy: ±0.5% of reading or ±1% of rated
Pickup delay: 0.000 to 65.535 s in steps of 0.001
Time accuracy: ±3% or ±5 cycles, whichever is greater
Operate time: < 5 cycles at 1.10  pickup at 60 Hz
SENSITIVE DIRECTIONAL POWER
Measured power: 3-phase, true RMS
Number of stages: 2
Characteristic angle: 0 to 359° in steps of 1
Calibration angle: 0.00 to 0.95° in steps of 0.05
Minimum power: –1.200 to 1.200 pu in steps of 0.001
Pickup level accuracy: ±1% or ±0.001 pu, whichever is greater
Hysteresis: 2% or 0.001 pu, whichever is greater
Pickup delay: 0 to 600.00 s in steps of 0.01
Time accuracy: ±3% or ±4 ms, whichever is greater
Operate time: 50 ms
PHASE UNDERVOLTAGE
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 102 to 103% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Curve shapes: GE IAV Inverse;
Definite Time (0.1s base curve)
Curve multiplier: Time dial = 0.00 to 600.00 in steps of
0.01
Timing accuracy: Operate at < 0.90  pickup
±3.5% of operate time or ±4 ms (which-
ever is greater)
AUXILIARY UNDERVOLTAGE
Pickup level: 0.000 to 3.000 pu in steps of 0.001
Dropout level: 102 to 103% of pickup
Level accuracy: ±0.5% of reading from 10 to 208 V
Curve shapes: GE IAV Inverse, Definite Time
Curve multiplier: Time Dial = 0 to 600.00 in steps of 0.01
Timing accuracy: ±3% of operate time or ±4 ms
(whichever is greater)