ERL L-PRO 4000, User Manual

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Appendix A IED Specifications
D02706R02.30 L-PRO 4000 User Manual Appendix A-7
A.1 Distance Element Operating Time Curves at
Nominal Frequency
Figure A.1 through A.6 show operating times for the relay distance elements.
The diagrams show operating times at each test point including output contact
operate time.
Faults were applied at a location representing a percentage of the Zone 1 relay
reach setting.
Tests were performed for source impedance ratios (SIR) of 0.1, 1.0, 10.0, and
30.0.
No pre-trigger load current or fault resistance was included. Operating times
are the same for both 50 Hz and 60 Hz.
Figure A.1: Phase Mho Operating Times Phase-to-Phase Faults
L-PRO Phase Mho Operating Times
Phase-to-Phase Faults
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0% 20% 40% 60% 80% 100%
Fault Location (%of Z1 Reach)
T
im
e (
cycl
es)
SIR 30
SIR 10
SIR 1
SIR 0.1