ABB Relion 670 Series REL670 - Measuring the Operating Limit of Set Values

Table 18: Test points for phase-to-earth L3-E (Ohm/Loop)
Test point Reach Value Comments
1 X (2 x X1
set
+X0
set
)/3
R 0
2 X (2 x X1
set
+ X0
set
)/3
R 2 x R1
set
+ R0
set
)/3
3 X 0.8 x (2 x X1
set
+ X0
set
)/3
R 0.8 x (2 x R1
set
+ R0
set
)/3 +RFPE
set
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 –0.1072 x RLdFw
set
Exact: 0.4 x RFPE x tan (ArgDir=20°)
R 0.4 x RLdFw
set
9 X –0.8 x RLdFw
set
x tan(ArgDir=20°)
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(AgNegDir=30°)
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(AgNegDir=30°)
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 Only used when RLdFw > RFPE
R RFPE
10.4.1.1 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 14 and table 17. Compare the result of the measurement with the set
value.
3. Repeat steps 1 to 2 to find the operating value for test points 2, 3 in table 17.
1MRK 506 355-UEN A Section 10
Testing functionality by secondary injection
Line distance protection REL670 2.1 IEC 93
Commissioning manual