GE L60 Instruction Manual page 41
Line phase comparison
system
ur series
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- Instruction manual (736 pages) ,
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2 PRODUCT DESCRIPTION
NEGATIVE SEQUENCE TOC
Current:
Phasor
Pickup level:
0.000 to 30.000 pu in steps of 0.001
Dropout level:
97% to 98% of pickup
Level accuracy:
±0.5% of reading or ±0.4% of rated
(whichever is greater)
from 0.1 to 2.0 x CT rating
±1.5% of reading > 2.0 x CT rating
Curve shapes:
IEEE Moderately/Very/Extremely
Inverse; IEC (and BS) A/B/C and Short
Inverse; GE IAC Inverse, Short/Very/
Extremely Inverse; I
(programmable); Definite Time (0.01 s
base curve)
Curve multiplier (Time dial): 0.00 to 600.00 in steps of 0.01
Reset type:
Instantaneous/Timed (per IEEE) and Lin-
ear
Curve timing accuracy
at 1.03 to 20 x pickup:
±3.5% of operate time or ±½ cycle
(whichever is greater) from pickup to
operate
NEGATIVE SEQUENCE IOC
Current:
Phasor
Pickup level:
0.000 to 30.000 pu in steps of 0.001
Dropout level:
97 to 98% of pickup
Level accuracy:
0.1 to 2.0 × CT rating: ±0.5% of reading
or ±0.4% of rated (whichever is greater);
> 2.0 × CT rating: ±1.5% of reading
Overreach:
<2%
Pickup delay:
0.00 to 600.00 s in steps of 0.01
Reset delay:
0.00 to 600.00 s in steps of 0.01
<20 ms at 3 × pickup at 60 Hz
Operate time:
Timer accuracy:
±3% of operate time or ±1/4 cycle
(whichever is greater)
PHASE DIRECTIONAL OVERCURRENT
°
Relay connection:
90
(quadrature)
Quadrature voltage:
ABC phase seq.: phase A (V
B (V
), phase C (V
CA
seq.: phase A (V
phase C (V
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
GE Multilin
2
t; FlexCurves™
), phase
BC
); ACB phase
AB
), phase B (V
),
CB
AC
)
BA
°
in steps of 1
L60 Line Phase Comparison System
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
3 × (|I_0| – K × |I_1|), IG
Level sensing:
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%
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
Zero-sequence:|I_0| – K × |I_1|
Level sensing:
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 Ω 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
WATTMETRIC ZERO-SEQUENCE DIRECTIONAL
Measured power:
zero-sequence
Number of elements:
2
Characteristic angle:
0 to 360° in steps of 1
Minimum power:
0.001 to 1.200 pu in steps of 0.001
Pickup level accuracy:
±1% or ±0.0025 pu, whichever is greater
Hysteresis:
3% or 0.001 pu, whichever is greater
Pickup delay:
definite time (0 to 600.00 s in steps of
0.01), inverse time, or FlexCurve
Inverse time multiplier:
0.01 to 2.00 s in steps of 0.01
Curve timing accuracy:
±3.5% of operate time or ±1 cycle
(whichever is greater) from pickup to
operate
Operate time:
<30 ms at 60 Hz
2.2 SPECIFICATIONS
2
2-11
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