ABB RED670 - Page 121

Table 20: Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Test point Reach Set value Comments
1 X X1
set
R 0
2 X X1
set
R R1
set
3 X 0.8 x X1
set
R 0.8 x R1
set
+ RFPP/2
4 X 0.5 x X1
set
R 0.5 x R1
set
+ RFPP/2
5 X 0.85 x RFPP x tan (ArgRLd)
ArgLd = angle for the maximal load
transfer
R 0.85 x RFPP
6 X RLdFw x tan (ArgLd)
R RLdFw
7 X 0
R RLdFw
8 X –0.2143 x RFPP/2 Exact: 0.8 x RFPP/2 (ArgDir=20°)
R 0.8 x RFPP/2
9 X –0.4 x RLdFw x tan(ArgDir=20°)
R 0.4 x RLdFw
10 X 0.5 x X1
set
Exact –0.5 x R1
set
x
tan(ArgNegRes=30°)
R –0.23 x X1
set
11 X 0.8 x X1
set
Exact –0.5 x R1
set
x
tan(ArgNegRes=30°)
R –0.37 x X1
set
12 X 0.5 x X1
set
R 0.5 x R1
set
13 X 0 Only used when RLdFw > 0.5 x
RFPP
R 0.5 x RFPP
Table 20 is used in conjunction with figure 23.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 115
Commissioning manual