7 Acceptance/Protection Function Test Guide
7-36
L-PRO 4000 User Manual
D02706R02.30
50N and 51N Test Procedure
Note: with 0 voltage applied, the unit becomes non-directional (i.e. picks up in
both forward and reverse directions).
1. In Relay Control Panel access relay
Metering>Protection
.
Monitor:
51N Alarm
Output Contact 6 (50N Trip)
2. Apply single-phase current to the relay terminals as follows:
Ph A: 300 – 301, 0.5 A
3. Slowly ramp the current up.
At 0.95 to 1.05 A (expect 1.0 A):
51N Alarm = High
4. Continue to raise current.
At 9.5 to 10.5 A (expect 10.0 A):
50N Trip = High
Contact 6 = Closed
5. Turn current off.
51N Alarm = Low
50N Trip = Low
Timing Test
1. Monitor (Timer Stop) on Output Contact 7.
2. Set timer start from single-phase 0.0 A to 4.00 A transition (this equates to
4x pickup).
3. Inject fault.
Observe Relay Target: “51N Trip”
End of 50N/51N test.
Time Delay
where
TMS
-
I
Multiple
-
(33)
TMS
B
A
I
Multiple
p
1
–
--------------------------------------
+
=
3
0.0228
0.0103
4
0.02
1
–
--------------------
+
3
0.0228 0.0103
0.0281
----------------
+
1.168
s
=
=
=
Summary of Contents for L-PRO 4000
Page 1: ...L PRO 4000 Transmission Line Protection Relay User Manual Version 2 3 Rev 0...
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Page 252: ...Appendix B IED Settings and Ranges Appendix B 34 L PRO 4000 User Manual D02706R02 30...
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