Measuring The Operating Limit Of Set Values; Measuring The Operating Time Of Distance Protection Zones - ABB Relion 670 Series Commissioning Manual
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- Technical manual (1432 pages) ,
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1MRK 504 165-UEN E
Test point
7
8
9
10
11
12
13
11.4.8.1
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
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
to figure
11.4.8.2
Measuring the operating time of distance protection zones
Procedure:
Transformer protection RET670
Commissioning manual
Reach
Value
X
0
R
RLdFw
set
X
–02143 x RLdFw
R
0.8 x RLdFw
set
X
–0.8 x RLdFw
set
tan(ArgDir=20°)
R
0.8 x RLdFw
set
X
0.17 x (2 x X1
set
R
-0.36 x (2 x X1
set
X
0.27 x (2 x X1
set
R
–0.57 x (2 x X1
set
X
0.5 x (2 x X1
set
R
0.5 x (2 x R1
set
X
0
R
RFPEZx
37
and table 32. Compare the result of the measurement with the set value.
1
to
2
to find the operating value for test points 2, 3 in table 32.
1
to
3
to find the operating value for the phase-to-earth fault L3-E according
38
and table 33.
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 six
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).
© Copyright 2017 ABB. All rights reserved
Comments
Exact: 0.8 x RFPEZx x tan (ArgDir=20°)
set
x
+ X0
)
Exact: 0.5 x (2 x X1
set
+ X0
)
Exact: 0.5 x (2X1
set
tan(AgNegDir=30°)
+X0
)
Exact: 0.8 x (2 x X1
set
+ X0
)
Exact: 0.8 x (2X1
set
tan(AgNegDir=30°)
+ X0
)/3
set
+ R0
)/3
set
Testing functionality by secondary injection
X0
)/3
set
set
+ X0
)/(3 x
set
set
+ X0
)/3
set
set
+ X0
)/(3 x
set
set
GUID-24FEBCE7-3409-4204-AA15-A1E0A1605866 v3
GUID-70AEC42A-9BC7-445A-AE21-2CEC0C3A79DC v3
Section 11
129
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