ABB RET670 Commissioning Manual page 100

Section 10
Testing functionality by secondary injection
40% of RLdFwd
80% of RLdFwd
encroachment)
ANSI05000369 V2 EN-US
Figure 21:
Table 24
Table 23:
Test point
1
2
3
4
5
6
7
8
9
Table continues on next page
94
2
1
11
10
12
120°
a
9
8
alt. 80% of
RFPG
RFPG (Load
Distance protection characteristic with test points for phase-to-ground
measurements
is used in conjunction with figure 21.
Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Reach Set value
X X1
set
R 0
X X1
set
R R1
set
X 0.8 x X1
set
R 0.8 x R1 + RFPP/2
set
X 0.5 x X1
set
R 0.5 x R1 + RFPP/2
set
X 0.85 x RFPP x tan (LdAngle)
R 0.85 x RFPP
X RLdFwd x tan (LdAngle)
R RLdFwd
X RLdFw x tan (LdAngle)
R 0
X –0.2143 x RFPP/2
R 0.8 x RFPP/2
X –0.4 x RLdFwd x tan(ArgDir)
R 0.4 x RLdFwd
80%
3
50%
4
5
6
7 13
20°
ANSI05000369-2-en.vsd
Comments
LdAngle = angle for the maximal load transfer
Exact: 0.8 x RFPP/2 (ArgDir)
1MRK 504 154-UUS B
Commissioning manual