GE L90 Instruction Manual page 48

2.4 SPECIFICATIONS
PHASE DIRECTIONAL OVERCURRENT
Relay connection:
Quadrature voltage:
Polarizing voltage threshold: 0.000 to 3.000 pu in steps of 0.001
2
Current sensitivity threshold: 0.05 pu
Characteristic angle:
Angle accuracy:
Operation time (FlexLogic operands):
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality:
Polarizing:
Polarizing voltage:
Polarizing current:
Operating current:
Level sensing:
Restraint, K:
Characteristic angle:
Limit angle:
Angle accuracy:
Offset impedance:
Pickup level:
Dropout level:
Operation time:
NEGATIVE SEQUENCE DIRECTIONAL OC
Directionality:
Polarizing:
Polarizing voltage:
Operating current:
Level sensing:
Restraint, K:
Characteristic angle:
Limit angle:
Angle accuracy:
Offset impedance:
Pickup level:
Dropout level:
Operation time:
2-18
°
90 (quadrature)
ABC phase seq.: phase A (V ), phase
BC
B (V ), phase C (V ); ACB phase
CA AB
seq.: phase A (V ), phase B (V
CB AC
phase C (V )
BA
°
0 to 359 in steps of 1
±2°
Tripping (reverse load, forward fault):
12 ms, typically
Blocking (forward load, reverse fault):
8 ms, typically
Co-existing forward and reverse
Voltage, Current, Dual
V_0 or VX
IG
I_0
3  (|I_0| – K  |I_1|), IG
0.000 to 0.500 in steps of 0.001
–90 to 90° in steps of 1
40 to 90° in steps of 1, independent for
forward and reverse
±2°
0.00 to 250.00  in steps of 0.01
0.002 to 30.000 pu in steps of 0.01
97 to 98%
< 16 ms at 3  pickup at 60 Hz
Co-existing forward and reverse
Voltage
V_2
I_2
Zero-sequence:|I_0| – K  |I_1|
Negative-sequence:|I_2| – K  |I_1|
0.000 to 0.500 in steps of 0.001
0 to 90° in steps of 1
40 to 90° in steps of 1, independent for
forward and reverse
±2°
0.00 to 250.00  in steps of 0.01
0.015 to 30.000 pu in steps of 0.01
97 to 98%
< 16 ms at 3  pickup at 60 Hz
L90 Line Current Differential System
WATTMETRIC ZERO-SEQUENCE DIRECTIONAL
Measured power:
Number of elements:
Characteristic angle:
),
Minimum power:
Pickup level accuracy:
Hysteresis:
Pickup delay:
Inverse time multiplier:
Time accuracy:
Operate time:
SENSITIVE DIRECTIONAL POWER
Measured power:
Number of stages:
Characteristic angle:
Calibration angle:
Minimum power:
Pickup level accuracy:
Hysteresis:
Pickup delay:
Time accuracy:
Operate time:
PHASE UNDERVOLTAGE
Voltage:
Pickup level:
Dropout level:
Level accuracy:
Curve shapes:
Curve multiplier:
Timing accuracy:
AUXILIARY UNDERVOLTAGE
Pickup level:
Dropout level:
Level accuracy:
Curve shapes:
Curve multiplier:
Timing accuracy:
PHASE OVERVOLTAGE
Voltage:
Pickup level:
Dropout level:
Level accuracy:
Pickup delay:
Operate time:
Timing accuracy:
2 PRODUCT DESCRIPTION
zero-sequence
2
0 to 360° in steps of 1
0.001 to 1.200 pu in steps of 0.001
±1% or ±0.0025 pu, whichever is greater
3% or 0.001 pu, whichever is greater
definite time (0 to 600.00 s in steps of
0.01), inverse time, or FlexCurve
0.01 to 2.00 s in steps of 0.01
±3% or ±20 ms, whichever is greater
<30 ms at 60 Hz
3-phase, true RMS
2
0 to 359° in steps of 1
0.00 to 0.95° in steps of 0.05
–1.200 to 1.200 pu in steps of 0.001
±1% or ±0.001 pu, whichever is greater
2% or 0.001 pu, whichever is greater
0 to 600.00 s in steps of 0.01
±3% or ±4 ms, whichever is greater
50 ms
Phasor only
0.000 to 3.000 pu in steps of 0.001
102 to 103% of pickup
±0.5% of reading from 10 to 208 V
GE IAV Inverse;
Definite Time (0.1s base curve)
Time dial = 0.00 to 600.00 in steps of
0.01
Operate at < 0.90  pickup
±3.5% of operate time or ±4 ms (which-
ever is greater)
0.000 to 3.000 pu in steps of 0.001
102 to 103% of pickup
±0.5% of reading from 10 to 208 V
GE IAV Inverse, Definite Time
Time Dial = 0 to 600.00 in steps of 0.01
±3% of operate time or ±4 ms
(whichever is greater)
Phasor only
0.000 to 3.000 pu in steps of 0.001
97 to 98% of pickup
±0.5% of reading from 10 to 208 V
0.00 to 600.00 in steps of 0.01 s
30 ms at 1.10  pickup at 60 Hz
±3% or ±4 ms (whichever is greater)
GE Multilin