ABB RED670 Commissioning Manual page 117

1MRK 505 378-UUS Rev. J
Table 26:
Test
points
1
2
3
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)
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)
Prepare the IED for verification of settings as outlined in section
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.
Ensure that the maximum continuous current in an IED does not exceed four times its rated value, if the
measurement of the operating characteristics runs under constant voltage conditions.
The test procedure has to take into consideration that the shaped load encroachment characteristic is
active. It is therefore necessary to check the setting. To verify the settings with the shaped load
encroachment characteristic the test should be carried out according to figures
and 28. In cases where the load encroachment characteristic is activated tests according to the adjusted
figures should be carried out.
To verify the settings for the operating points according to the following fault types should be tested:
• One phase-to-phase fault
• One phase-to-ground fault
The shape of the operating characteristic depends on the values of the setting parameters.
Line differential protection RED670
Commissioning manual
Test points for phase-to-ground loops A-B (Ohm/Loop)
Reach Value
X ZPG · sin(ZAngPG)
R ZPG · cos(ZAngPG)
X 0,5·ZPG · sin(ZAngPG)
R 0,5·ZPG + ΔR = 0,5·ZPG · (1 - cos(ZAngPG))
X 0,5·ZPG·sin(ZangPG)
R 0,5·ZPG - ΔR = 0,5·ZPG · (1 - cos(ZAngPG))
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Testing functionality by secondary injection
Comments
GUID-79761A97-A99A-4788-94A5-341308DF6E45 v3
GUID-A35C2DED-70A6-4E96-864D-3A6C1147B350 v3
"Preparing for test" in this chapter.
29 and 30
Section 11
and tables 27
111