GE Multilin
L30 Line Current Differential System
2-17
2 PRODUCT DESCRIPTION
2.4 SPECIFICATIONS
2
2.4SPECIFICATIONS
2.4.1 PROTECTION ELEMENTS
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. Take this into account when using FlexLogic to inter-
connect 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
In-zone transformer group compensation: 0 to 330° in steps of 30°
Inrush inhibit level:
1.0 to 40.0%f
0
in steps of 0.1
Inrush inhibit mode:
per-phase, 2-out-of-3, average
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
2
t; FlexCurves™
(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)
Timing accuracy:
Operate at > 1.03
actual pickup
±3.5% of operate time or ±½ cycle
(whichever is greater)
PHASE/NEUTRAL/GROUND IOC
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
Operate time:
<16 ms at 3
pickup at 60 Hz
(Phase/Ground IOC)
<20 ms at 3
pickup at 60 Hz
(Neutral IOC)
Timing accuracy:
Operate at 1.5
pickup
±3% or ±4 ms (whichever is greater)
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
2
t; FlexCurves™
(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
Timing accuracy:
Operate at > 1.03
actual pickup
±3.5% of operate time or ±½ cycle
(whichever is greater)
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
Operate time:
< 20 ms at 3
pickup at 60 Hz
Timing accuracy:
Operate at 1.5
pickup
±3% or ±4 ms (whichever is greater)
NOTE
Summary of Contents for L30
Page 10: ...x L30 Line Current Differential System GE Multilin TABLE OF CONTENTS ...
Page 30: ...1 20 L30 Line Current Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 370: ...5 244 L30 Line Current Differential System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 464: ...A 10 L30 Line Current Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 600: ...C 30 L30 Line Current Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 610: ...D 10 L30 Line Current Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Page 622: ...E 12 L30 Line Current Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Page 634: ...F 12 L30 Line Current Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...
Page 644: ...x L30 Line Current Differential System GE Multilin INDEX ...
