ArgDir
R
X
RFltFwdPG
60 deg
1
3
)
1
(
XN
X
+
5
2
4
ArgNegRes
85%
LdAngle
50% of
RLdFwd
6
ANSI09000734-1-en.vsd
)
/
(
phase
W
)
/
(
phase
W
7
ANSI09000734 V1 EN
Figure 13:
Operating characteristic for phase selection function, forward direction
single-phase faults
Table 6:
Test points for phase-ground loop CG (Ohm/loop)
Test point
Reach
Value
Comments
1
X
[X1+XN]
XN=(X
0
-X
1
)/3
R
0
2
X
0
R
RLdFwd
When RLdFWd < RFltFwPG
R
RFltFwPG
When RLdFwdPG > RFltFwPG
3
X
0.85·[X1+XN]
R≈0.491·(X1+XN)+RFltFwdPG
R
4
X
0.85·[X1+XN]
Can be limited by RFltFwPG
R
-0.85·[X1+XN]·
tan (AngNegRes-90°)
5
X
RFltFwdPG·tan (LdAngle)
Only when RLdFwd < RFltFwPG
R
RFltFwdPG
6
X
-0,5·RLdFwd·tan (ArgDir)
R
0,5·RLdFwd
1MRK 506 331-UUS A
Section 6
Testing functionality
53
Commissioning Manual
Содержание Relion 650 Series REL650
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