ABB Relion 670 series - Measuring the Operating Limit of Set Values

X1
R
X
85%
1
3
5
2
6
4
50% RLdFwd
ArgNegRes
0.5·RFltFwdPP
LdAngle
ANSI09000735-1-en.vsd
ArgDir
60°
)/( phaseW
)/( phaseW
7
ANSI09000735 V1 EN-US
Figure 28: Operating characteristic for phase selection function, forward direction phase-to-phase
faults
Table 23: Test points for phase-to-phase loops A-B (Ohm/phase)
Test point
Reach Value Comments
1 X X1
R 0
2 X 0
R RLdFwd When RLdFWd < 0,5·RFLdFwPP
R 0.5·RFLdFwPP When RLdFwd > 0,5·RFLdFwPP
3 X 0.85·X1 R=0.491·X1+0.5 RFLdFwdPP
R 0.85·X1·1/tan(60°)+0.5
RFLdFwdPP
4 X 0.85·X1 Can be limited by RFLdFwPP
R -0.85·X1·tan (AngNegRes-90°)
5 X 0.5·RFLdFwdPP·tan (ArgLd) Only when RLdFwd < RFLdFwPP
R 0.5·RFLdFwdPP
6 X -0.5·RLdFwd·tan (ArgDir)
R 0.5·RLdFwd
Table 23 is used together with figure 28.
11.4.2.1 Measuring the operating limit of set values
M13906-73 v6
Procedure:
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
112 Transformer protection RET670
Commissioning manual
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