Measuring The Operating Limit Of Set Values - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
IEC09000735 V3 EN-US
Figure 28: Operating characteristic for phase selection function, forward direction
Table 23:
Test point
1
2
3
4
5
6
Table 23
11.4.2.1

Measuring the operating limit of set values

Procedure:
112
X
1
4
85%
X1
ArgNegRes
50% RLdFw
0.5·RFFwPP
phase-to-phase faults
Test points for phase-to-phase loops L1–L2 (Ohm/phase)
Reach Value
X X1
R 0
X 0
R RLdFw
R 0,5·RFFwPP
X 0.85·X1
R 0.85·X1·1/tan(60°)+0.5 RFFwPP
X 0.85·X1
R -0.85·X1·tan (AngNegRes-90°)
X 0.5·RFFwPP·tan (ArgLd)
R 0.5·RFFwPP
X -0.5·RLdFw·tan (ArgDir)
R 0.5·RLdFw
is used together with figure 28.
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W
( / phase )
5
60°
2
7
6
ArgDir
Comments
When RLdFw < 0,5·RFFwPP
When RLdFw > 0,5·RFFwPP
R=0.491·X1+0.5 RFFwPP
Can be limited by RFFwPP
Only when RLdFW < RFFwPP
3
ArgLd
W
( / phase )
R
IEC09000735-3-en.vsd
Transformer protection RET670
Commissioning manual
1MRK 504 165-UEN E
M13906-73 v6