ABB RET670 - Page 145

Test point Reach Set value Comments
9 X –0.4 x RLdFwd x tan(ArgDir=20°)
R 0.4 x RLdFwd
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
R 0.5 x RFPPZx
Table 30 is used in conjunction with figure 35.
50%
80%
1
2
3
4
5
6
7
8
9
10
11
80% of RLdFwd
40% of RLdFwd
RFPG
12
ANSI05000369-2-en.vsd
13
a
alt. 80% of
RFPG (Load
encroachment)
120°
20°
ANSI05000369 V2 EN
Figure 36: Distance protection characteristic with test points for phase-to-ground
measurements
Table 31 is used in conjunction with figure 36.
1MRK 504 165-UUS - Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 139
Commissioning manual