Protection Elements - GE L30 Instruction Manual

2 PRODUCT DESCRIPTION
2.4SPECIFICATIONS
The operating times below include the activation time of a trip rated form-A output contact unless otherwise indi-
cated. FlexLogic™ operands of a given element are 4 ms faster. This should be taken into account when using
NOTE
FlexLogic™ to interconnect with other protection or control elements of the relay, building FlexLogic™ equations, or
interfacing with other IEDs or power system devices via communications or different output contacts.
LINE CURRENT DIFFERENTIAL (87L)
Application: 2 or 3 terminal line, series compensated
line, tapped line, with charging current
compensation
Pickup current level: 0.20 to 4.00 pu in steps of 0.01
CT Tap (CT mismatch factor): 0.20 to 5.00 in steps of 0.01
Slope # 1: 1 to 50%
Slope # 2: 1 to 70%
Breakpoint between slopes: 0.0 to 20.0 pu in steps of 0.1
Zero-sequence current differential (87LG):
87LG pickup level: 0.05 to 1.00 pu in steps of 0.01
87LG slope: 1 to 50%
87LG pickup delay: 0.00 to 5.00 s in steps of 0.01
DTT: Direct Transfer Trip (1 and 3 pole) to
remote L90
Operating Time: 1.0 to 1.5 power cycles duration
Asymmetrical channel delay compensation using GPS:
asymmetry up to 10 ms
PHASE/NEUTRAL/GROUND TOC
Current: Phasor or RMS
Pickup level: 0.000 to 30.000 pu in steps of 0.001
Dropout level: 97% to 98% of pickup
Level accuracy:
for 0.1 to 2.0 × CT:
±0.5% of reading or ±0.4% of rated
(whichever is greater)
for > 2.0 × CT: ±1.5% of reading > 2.0 × 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)
Operate at > 1.03 × actual pickup
Timing accuracy:
±3.5% of operate time or ±½ cycle
(whichever is greater)
GE Multilin
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:
NEGATIVE SEQUENCE TOC
Current:
Pickup level:
Dropout level:
Level accuracy:
Curve shapes:
2
t; FlexCurves™
Curve multiplier (Time dial): 0.00 to 600.00 in steps of 0.01
Reset type:
Timing accuracy:
NEGATIVE SEQUENCE IOC
Current:
Pickup level:
Dropout level:
Level accuracy:
Overreach:
Pickup delay:
Reset delay:
Operate time:
Timing accuracy:
L30 Line Current Differential System
2.4 SPECIFICATIONS

2.4.1 PROTECTION ELEMENTS

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)
Phasor
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)
from 0.1 to 2.0 x CT rating
±1.5% of reading > 2.0 x 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)
Instantaneous/Timed (per IEEE) and Lin-
ear
Operate at > 1.03 × actual pickup
±3.5% of operate time or ±½ cycle
(whichever is greater)
Phasor
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
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
< 2%
0.00 to 600.00 s in steps of 0.01
0.00 to 600.00 s in steps of 0.01
< 20 ms at 3 × pickup at 60 Hz
Operate at 1.5 × pickup
±3% or ±4 ms (whichever is greater)
2
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