Measuring The Operating Limit Of Set Values In Cases Without Shaped Load Encroachment Characteristics (Operationldcmp=Off) - ABB RET670 Installation And Commissioning Manual
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Also See for RET670:
- Applications manual (1016 pages) ,
- Commissioning manual (328 pages) ,
- Operator's manual (128 pages)
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Section 13
Verifying settings by secondary injection
13.5.1.1
120
Test point
Reach
Value
4
X
0.5 x (2 x X1
R
0.5 x (2 x R1
5
X
0.85 x RFPE
R
0.85 x RFPE
6
X
RLdFwset x tan(ArgLdSet)
R
RLdFw
7
X
0
R
RLdFw
8
X
–02143 x RLdFw
R
0.8 x RLdFw
9
X
–0.8 x RLdFw
R
0.8 x RLdFw
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
with the set value.
3.
Repeat steps
1
to
2
and the operating value for the phase-to-earth loop according to test point 1,
2, 3 in table 21.
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-earth
fault L3-E according to figure
+ R0
)/3
set
set
+R0
)/3 + RFPE
set
set
x tan(ArgLdset)
set
set
set
set
set
x tan(ArgDir)
set
set
+ X0
)
set
set
+ X0
)
set
set
+X0
)
set
set
+ X0
)
set
set
+ X0
)/3
set
set
+ R0
)/3
set
set
52
and table 20. Compare the result of the measurement
to find the operating value for test point 2, 3 in
53
and table
1MRK 504 088-UEN C
Comments
set
ArgLd = angle for the maximal load
transfer.
Exact: 0.8 x RFPE x tan (ArgDir)
Exact: 0.5 x (2 x X1
X0
set
Exact: 0.5 x (2X1
+ X0
set
tan(AgNegDir90)
Exact: 0.8 x (2 x X1
+ X0
set
Exact: 0.8 x (2X1set + X0set)/(3 x
tan(AngNegDir 90))
table20
21
Installation and commissioning manual
)/3
set
)/(3 x
set
)/3
set
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