ZAngPG
50%
Ohm/loop
R
X
ANSI07000010-1-en.vsd
ANSI07000010 V1 EN-US
Figure 30: Proposed test points for phase-to-ground faults
Table 25: Test points for phase-to-ground loops A-B (Ohm/Loop)
Test
points
Reach Value Comments
1 X ZPG · sin(ZAngPG)
R ZPG · cos(ZAngPG)
2 X 0,5·ZPG · sin(ZAngPG)
R 0,5·ZPG + ΔR = 0,5·ZPG · (1 - cos(ZAngPG))
3 X 0,5·ZPG·sin(ZangPG)
R 0,5·ZPG - ΔR = 0,5·ZPG · (1 - cos(ZAngPG))
Check also in the same way as for phase-to-ground fault for each test point that the output signals
PHG_FLT, are activated where x refers to the actual phase to be tested. After the timer tPG for the zone
has elapsed, also the signals TRIP, TRPG and TR_x shall be activated.
11.4.4 Faulty phase identification with load encroachment FMPSPDIS
(21)
GUID-79761A97-A99A-4788-94A5-341308DF6E45 v3
There is no specific test routine for this function. The function is tested in conjunction with other
impedance (mho) functions.
11.4.5 Distance protection zones, quadrilateral characteristic, separate
settings ZMRPDIS (21)
GUID-A35C2DED-70A6-4E96-864D-3A6C1147B350 v3
Prepare the IED for verification of settings as outlined in section "Preparing for test" in this chapter.
Consider releasing Zone 1 with the Phase selection with load encroachment, quadrilateral characteristic
(FRPSDPIS). If the autorecloser is not released and in service, trip will always be three phase.
Measure operating characteristics during constant current conditions. Keep the measured current as
close as possible to its rated value or lower. But make sure it is higher than 30% of the rated current.
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 115
Commissioning manual
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