ABB Relion 670 series - Page 123

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