ABB RET670 Commissioning Manual page 107

1MRK 504 154-UUS B
X1
40% of RLdFwd
80% of RLdFwd
ANSI05000368 V1 EN-US
Figure 24: Distance protection characteristic with test points for phase-to-phase
Table 27:
Test point
1
2
3
4
5
6
7
8
9
Table continues on next page
Commissioning manual
X
2
1
80%
11
50%
10
12
120°
a
7
9
8
0.5 x RFPP
measurements
Test points for phase-to-phase loops A-B (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 0
R RLdFw
X –0.2143 x RFPP/2
R 0.8 x RFPP/2
X –0.4 x RLdFwd x
tan(ArgDir=20°)
R 0.4 x RLdFwd
3
4
5
6
(O/phase)
R
13
c
20°
ANSI05000368-1-en.vsd
Comments
LdAngle = angle for the maximal load transfer
Exact: 0.8 x RFPP/2 (ArgDir=20°)
Testing functionality by secondary injection
Section 10
101