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Section 12
Testing functionality by secondary injection
12.4.3.1
12.4.3.2
118
Test point
Reach
Value
10
X
0.17 x (2 x X1
R
-0.36 x (2 x X1
11
X
0.27 x (2 x X1
R
–0.57 x (2 x X1
12
X
0.5 x (2 x X1
R
0.5 x (2 x R1
13
X
0
R
RFPE
Measuring the operating limit of set values in cases without shaped
load encroachment characteristics (OperationLdCmp=off)
Procedure for phase-to-phase fault L1–L2.
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 12. Compare the result of the measurement with the set
value.
3.
Repeat steps
1
to 2to find the operating value for test point 2, 3 in table
the operating value for the phase-to-earth loop according to test point 1, 2, 3 in
table 13.
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
according to figure
Test points 8 and 9 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 6, 7, 8 and 9 once, in the forward direction (the largest
reverse zone can be used to facilitate the test) in order to test the
accuracy of directionality (directional angles). Directional
functionality testing (trip inside, no-trip outside) should always
be carried for all impedance zones set with directionality
(forward or reverse).
Measuring the operate time of distance protection zones
+ X0
)
set
set
+ X0
)
set
set
+X0
)
set
set
+ X0
)
set
set
+ X0
)/3
set
set
+ R0
)/3
set
set
to find the operating value for the phase-to-earth fault L3-E
32
and table
13
1MRK502053-UEN B
Comments
Exact: 0.5 x (2 x X1
X0
)/3
set
set
Exact: 0.5 x (2X1
+ X0
)/(3 x
set
set
tan(AgNegDir=30°)
Exact: 0.8 x (2 x X1
+ X0
set
set
Exact: 0.8 x (2X1set + X0set)/(3 x
tan(AgNegDir=30°)
Generator protection REG670 2.0 IEC
Commissioning manual
)/3
12
and
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