7 Acceptance/Protection Function Test Guide
D02706R02.30
L-PRO 4000 User Manual
7-17
2. Use the minimum test current to determine what voltage would be appro-
priate for this test.
From Equation (21) we can derive the formula:
And using appropriate values, the Minimum Fault Voltage is
(20)
(21)
(22)
where
V
FaultMin
- Minimum Fault Voltage
I
TestMin
- Minimum Fault Test Current
(23)
3.2
2
-------
1.6
A
=
Z
V
FaultMin
2
I
TestMin
-----------------------------
=
V
FaultMin
Z
2
I
TestMin
=
V
FaultMin
7.38
2 1.6
A
23.6
V
=
=
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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