ABB RET670 Commissioning Manual page 95

1MRK 504 154-UUS B
X1
ANSI09000735 V1 EN-US
Figure 17:
Table 20: Test points for phase-to-phase loops A-B (Ohm/phase)
Test point
1
2
3
4
5
6
Table 20
Commissioning manual
(
X
1
4
85%
ArgNegRes
6
50% RLdFwd
0.5·RFltFwdPP
Operating characteristic for phase selection function, forward direction phase-
to-phase faults
Reach Value
X X1
R 0
X 0
R RLdFwd
R 0.5·RFLdFwPP
X 0.85·X1
R 0.85·X1·1/tan(60°)+0.5
RFLdFwdPP
X 0.85·X1
R -0.85·X1·tan (AngNegRes-90°)
X 0.5·RFLdFwdPP·tan (ArgLd)
R 0.5·RFLdFwdPP
X -0.5·RLdFwd·tan (ArgDir)
R 0.5·RLdFwd
is used together with figure 17.
W
/ phase )
3
LdAngle
5
60°
2
7
ArgDir
ANSI09000735-1-en.vsd
Comments
When RLdFWd < 0,5·RFLdFwPP
When RLdFwd > 0,5·RFLdFwPP
R=0.491·X1+0.5 RFLdFwdPP
Can be limited by RFLdFwPP
Only when RLdFwd < RFLdFwPP
Testing functionality by secondary injection
W
( / phase )
R
Section 10
89