ABB Relion 670 series - Page 135

X1set
R
X
(Ω/phase)
50%
80%
1
2
3
4
5
6
7
8
9
10
11
50% of RFPPZx/2
25% of RFPPZx/2
RFPP/2
12
ANSI05000368-2-en.vsdx
13
ArgDir
ArgLd
ANSI05000368 V2 EN-US
Figure 37: Distance protection characteristic with test points for phase-to-phase measurements
Table 32: Test points for phase-to-phase loops A-B (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
+ RFPPZx/2
4 X 0.5 x X1
set
R 0.5 x R1
set
+ RFPPZx/2
5 X 0.85 x RFPPZx x tan (LdAngle) LdAngle = angle for the maximal load transfer
R 0.85 x RFPPZx
6 X RLdFwd x tan (LdAngle)
R RLdFwd
7 X RLdFwd x tan (LdAngle)
R 0
8 X –0.2143 x RFPPZx/2 Exact: 0.8 x RFPPZx/2 (ArgDir=20°)
R 0.8 x RFPPZx/2
9 X –0.4 x RLdFwd x tan(ArgDir=20°)
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 129
Commissioning manual
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