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

1MRK 505 378-UEN Rev. H
IEC09000735 V3 EN-US
Figure 26: 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:
1. Supply the IED with healthy conditions for at least two seconds.
2. Apply the fault condition and slowly decrease the measured impedance to find the
operate value for of the phase-to-earth loop L3, test point 1, according to figure 25.
Compare the result of the measurement with the expected value according to table 22.
Line differential protection RED670
Commissioning manual
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 26.
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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
Testing functionality by secondary injection
3
ArgLd
W
( / phase )
R
IEC09000735-3-en.vsd
Section 11
M13906-73 v6
109