ABB RET670 - Measuring the Operating Limit of Set Values in Cases Without Shaped Load Encroachment Characteristics (Operationldcmp=Off)

Test point Reach Value Comments
4 X 0.5 x (2 x X1
set
+ R0
set
)/3
R 0.5 x (2 x R1
set
+R0
set
)/3
+ RFPE
set
5 X 0.85 x RFPE
set
x tan(ArgLdset) ArgLd = angle for the maximal load
transfer.
R 0.85 x RFPE
6 X RLdFwset x tan(ArgLdSet)
R RLdFw
set
7 X 0
R RLdFw
set
8 X –02143 x RLdFw
set
Exact: 0.8 x RFPE x tan (ArgDir)
R 0.8 x RLdFw
set
9 X –0.8 x RLdFw
set
x tan(ArgDir)
R 0.8 x RLdFw
set
10 X 0.17 x (2 x X1
set
+ X0
set
) Exact: 0.5 x (2 x X1
set
X0
set
)/3
R -0.36 x (2 x X1
set
+ X0
set
) Exact: 0.5 x (2X1
set
+ X0
set
)/(3 x
tan(AgNegDir90)
11 X 0.27 x (2 x X1
set
+X0
set
) Exact: 0.8 x (2 x X1
set
+ X0
set
)/3
R –0.57 x (2 x X1
set
+ X0
set
) Exact: 0.8 x (2X1set + X0set)/(3 x
tan(AngNegDir 90))
12 X 0.5 x (2 x X1
set
+ X0
set
)/3
R 0.5 x (2 x R1
set
+ R0
set
)/3
13 X 0
R RFPE
13.5.1.1 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
52 and table 20. Compare the result of the measurement
with the set value.
3.
Repeat steps
1 to 2 to find the operating value for test point
2, 3 in table
20
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
53 and table 21
Section 13 1MRK 504 088-UEN C
Verifying settings by secondary injection
120
Installation and commissioning manual