ABB RED670 Commissioning Manual page 120

Section 11
Testing functionality by secondary injection
Test point
4
5
6
7
8
9
10
11
12
13
11.4.5.1 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
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 1 to 3 above to find the operating value for the phase-to-ground fault L3-G according
to figure
114
Reach Value
X 0.5 x (2 x X1 + R0
set
R 0.5 x (2 x R1 +R0
set
RFPG
set
X 0.85 x RFPG x tan(LdAngleset)
set
R 0.85 x RFPG
X RLdFwdset x tan(LdAngleSet)
R RLdFwd
set
X 0
R RLdFwd
set
X –02143 x RLdFwd
R 0.8 x RLdFwd
set
X –0.8 x RLdFwd
set
R 0.8 x RLdFwd
set
X 0.17 x (2 x X1 + X0
set
R -0.36 x (2 x X1 + X0
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 RFPG
1 to 2 to find the operating value for test points 2, 3 in table27.
30 and table 28.
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).
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Comments
)/3
set
)/3 +
set
LdAngle = angle for the maximal load transfer.
Exact: 0.8 x RFPG x tan (ArgDir)
set
x tan(ArgDir)
) Exact: 0.5 x (2 x X1
set
) Exact: 0.5 x (2X1
set
) Exact: 0.8 x (2 x X1
set
+ X0 ) Exact: 0.8 x (2X1set + X0set)/(3 x tan(AngNegDir 90))
set
)/3
set
)/3
set
1MRK 505 378-UUS Rev. J
X0 )/3
set set
+ X0 )/(3 x tan(AgNegDir90)
set set
+ X0 )/3
set set
GUID-02EE80DB-CE52-49F0-99C4-14FD84766009 v3
29 and table 27. Compare
Line differential protection RED670
Commissioning manual