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Section 11
Testing functionality by secondary injection
Test point
10
11
12
13
11.4.8.3
Measuring the operating limit of set values
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 and table .
Compare the result of the measurement with the set value.
3.
Repeat steps
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
figure and table .
11.4.8.4
Measuring the operating time of distance protection zones
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 and table for zone 1. Compare the result of the measurement with the
setting t1PP.
3.
Repeat steps
10 in figure and table . Compare the result of the measurement with the setting t1PE.
4.
Repeat steps
Observe that the zones that are not tested have to be blocked and the zone that is tested has
to be released.
11.4.8.5
Transient directional element
Since the transient directional element is operating in the time domain, based on an RL circuit model,
it expects that the input current signals have proper transitions going from healthy to faulty state. This
essentially means that the test equipment has to be able to generate currents with a DC-component
122
Reach
Value
X
0.17 x (2 x X1
+ X0
set
R
-0.36 x (2 x X1
set
X
0.27 x (2 x X1
+X0
set
R
–0.57 x (2 x X1
set
X
0.5 x (2 x X1
+ X0
set
R
0.5 x (2 x R1
+ R0
set
X
0
R
RFPEZx
1
to
2
to find the operating value for test points 2, 3 in table .
1
to
3
to find the operating value for the phase-to-earth fault L3-E according to
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 seven 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).
1
to
2
to find the operating time for the phase-to-earth fault according to test point
1
to
2
to find the operating time for all other used measuring zones.
© 2017 - 2022 Hitachi Energy. All rights reserved
Comments
)
Exact: 0.5 x (2 x X1
set
+ X0
)
Exact: 0.5 x (2X1
set
)
Exact: 0.8 x (2 x X1
set
+ X0
)
Exact: 0.8 x (2X1
set
)/3
set
)/3
set
1MRK 505 378-UEN Rev. K
X0
)/3
set
set
+ X0
)/(3 x tan(AgNegDir=30°)
set
set
+ X0
)/3
set
set
+ X0
)/(3 x tan(AgNegDir=30°)
set
set
GUID-24FEBCE7-3409-4204-AA15-A1E0A1605866 v4
GUID-70AEC42A-9BC7-445A-AE21-2CEC0C3A79DC v3
GUID-401518F3-26DD-4994-80A1-DE94D51945E9 v1
Line differential protection RED670
Commissioning manual
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