Test point Reach Value Comments
12 X 0.5 x (2 x X1
set
+ X0
set
)/3
R 0.5 x (2 x R1
set
+ R0
set
)/3
13 X 0
R RFPG
11.4.5.1 Measuring the operating limit of set values
GUID-02EE80DB-CE52-49F0-99C4-14FD84766009 v3
Procedure:
1. Subject the IED to healthy normal load conditions for at least two seconds.
2. Apply the fault condition and slowly decrease the measured impedance to find the operating value
of the phase-to-phase fault for zone 1 according to test point 1 in figure
31 and table 26. Compare
the result of the measurement with the set value.
3. Repeat steps 1 to 2 to find the operating value for test points 2, 3 in table26.
Observe that the zones that are not tested have to be blocked and the zone that is tested has to be
released.
4. Repeat steps 1 to 3 above to find the operating value for the phase-to-ground fault L3-G according
to figure
32 and table 27.
Test points 8, 9, 10 and 11 are intended to test the directional lines of impedance
protection. Since directionality is a common function for all 5 measuring zones, it is
only necessary to test points 8, 9, 10 and 11 once, in the forward direction in order
to test the accuracy of directionality (directional angles). Directional functionality
testing (trip inside, no-trip outside) should always be made for all impedance zones
set with directionality (forward or reverse).
11.4.5.2 Measuring the operating time of distance protection zones
GUID-9AEFB83B-A343-4965-BB41-59062CC0DB5F v3
Procedure:
1. Subject the IED to healthy normal load conditions for at least two seconds.
2. Apply the fault condition to find the operating time for the phase-to-phase fault according to test
point 10 in figure
31 and table 26 for zone 1. Compare the result of the measurement with the
setting tPP.
3. Repeat steps
1 to 2 to find the operating time for the phase-to-ground fault according to test point
10 in figure 32 and table 27. Compare the result of the measurement with the setting tPG.
4. Repeat steps
1 to 2 to find the operating time for all other used measuring zones.
Observe that the zones that are not tested have to be blocked and the zone that is tested has to be
released.
11.4.6 Phase selection, quadrilateral characteristic with settable angle
FRPSPDIS (21)
GUID-701C863B-40C6-42D7-A0C8-ECEB084B1165 v4
Prepare the IED for verification of settings as outlined in section
"Preparing for test" in this chapter.
The phase selectors operate on the same measuring principles as the impedance measuring zones. So it
is necessary to follow the same principles as for distance protection, when performing the secondary
injection tests.
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 119
Commissioning manual
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