ABB RED670 Commissioning Manual page 110

Section 11
Testing functionality by secondary injection
(2 x X1set+X0set)/3
25% of RFPEZx
ANSI05000369 V3 EN-US
Figure 24:
Table 22
Table 22:
Test point
1
2
3
4
5
6
7
8
Table continues on next page
104
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 24.
Test points for phase-to-earth L3-E (Ohm/Loop)
Reach Value
X (2 x X1 +X0
set
R 0
X (2 x X1 + X0
set
R 2 x R1 + R0
set
X 0.8 x (2 x X1
R 0.8 x (2 x R1
+RFPE
set
X 0.5 x (2 x X1
R 0.5 x (2 x R1
RFPE
set
X 0.85 x RFPE
R 0.85 x RFPE
X RLdFwset x tan(ArgLdSet)
R RLdFw
set
X 0
R RLdFw
set
X –0.1072 x RLdFw
R 0.4 x RLdFw
© 2017 - 2021 Hitachi Power Grids. All rights reserved
80%
3
50%
4
5
ArgLd
6
(Ω /loop)
R
7 13
ArgDir
ANSI05000369-3-en.vsdx
Comments
)/3
set
)/3
set
)/3
set
+ X0 )/3
set set
+ R0 )/3
set set
+ R0 )/3
set set
+R0 )/3 +
set set
x tan(ArgLdset) ArgLd = angle for the maximal load transfer
set
Exact: 0.4 x RFPE x tan (ArgDir=20°)
set
set
1MRK 505 378-UUS Rev. J
Line differential protection RED670
Commissioning manual