CHAPTER 2: PRODUCT DESCRIPTION
SPECIFICATIONS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
2-27
2
2.6.1 Protection elements
The operating times include the activation time of a trip rated form-A output contact unless otherwise indicated. FlexLogic
operands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect with other
protection or control elements of the relay, building FlexLogic equations, or interfacing with other intelligent electronic
devices (IEDs) or power system devices via communications or different output contacts. If not specified, the operate times
given here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
LINE CURRENT DIFFERENTIAL (87L)
Application:
2 or 3 terminal line, series compensated line, tapped line, with charging current compensation
Characteristic:
Dual slope percent differential
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%
Level accuracy:
±3% of reading of the maximum circuit current
Breakpoint between slopes:
0.0 to 20.0 pu in steps of 0.1
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
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
87LG operate time:
1.5 to 2.5 cycles
PHASE/NEUTRAL/GROUND TOC
Current:
Phasor or RMS
Pickup level:
0.020 to 30.000 pu in steps of 0.001
Dropout level:
97% to 98% of pickup
Level accuracy:
0.1 to 2.0
×
CT:
±0.5% of reading or ±0.4% of rated (whichever is greater)
> 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)
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
Voltage restraint:
Modifies pickup current for voltage in the range of 0.1 < V < 0.9 VT Nominal in a fixed linear rela-
tionship
PHASE/NEUTRAL/GROUND IOC
Pickup level:
0.020 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
Содержание L30
Страница 10: ...x L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 14: ...1 4 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
Страница 126: ...3 68 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL CONNECT TO D400 GATEWAY CHAPTER 3 INSTALLATION 3 ...
Страница 214: ...4 88 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FLEXLOGIC DESIGN USING ENGINEER CHAPTER 4 INTERFACES 4 ...
Страница 582: ...7 16 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 598: ...9 6 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 9 COMMISSIONING 9 ...
Страница 622: ...10 24 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FAULT LOCATOR CHAPTER 10 THEORY OF OPERATION 10 ...
Страница 670: ...A 18 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 678: ...C 6 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
Страница 682: ...D 4 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL REVISION HISTORY APPENDIX D MISCELLANEOUS D ...
Страница 686: ...iv L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...