ABB Relion 670 Series Commissioning Manual page 123

1MRK 504 165-UUS Rev. J
(2 x X1set+X0set)/3
25% of RFPEZx
ANSI05000369 V3 EN-US
Figure 32:
Table 27
Table 26:
Test point
1
2
3
4
5
6
7
8
9
Table continues on next page
Transformer protection RET670
Commissioning manual
X
2
1
11
10
12
9
8
50% of RFPEZx
alt. 80% of
RFPG
RFPG (Load
encroachment)
Distance protection characteristic with test points for phase-to-ground measurements
is used in conjunction with figure 32.
Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Reach Set value
X X1
set
R 0
X X1
set
R R1
set
X 0.8 x X1
set
R 0.8 x R1 + RFPP/2
set
X 0.5 x X1
set
R 0.5 x R1 + RFPP/2
set
X 0.85 x RFPP x tan (LdAngle)
R 0.85 x RFPP
X RLdFwd x tan (LdAngle)
R RLdFwd
X RLdFw x tan (LdAngle)
R 0
X –0.2143 x RFPP/2
R 0.8 x RFPP/2
X –0.4 x RLdFwd x tan(ArgDir)
R 0.4 x RLdFwd
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80%
3
50%
4
5
ArgLd
6
(Ω /loop)
R
7 13
ArgDir
ANSI05000369-3-en.vsdx
Comments
LdAngle = angle for the maximal load transfer
Exact: 0.8 x RFPP/2 (ArgDir)
Section 11
Testing functionality by secondary injection
117