ABB Relion 670 Series Commissioning Manual page 125

1MRK 506 371-UUS E
X1
40% of RLdFwd
80% of RLdFwd
ANSI05000368 V1 EN-US
Figure 33: Distance protection characteristic with test points for phase-to-phase
Table 30: Test points for phase-to-phase loops A-B (Ohm/Loop)
Test point
1
2
3
4
5
6
7
8
9
Table continues on next page
Line distance protection REL670
Commissioning manual
X
2
1
80%
11
50%
10
12
120°
a
6
7
9
8
0.5 x RFPP
measurements
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 + RFPPZx/2
set
X 0.5 x X1
set
R 0.5 x R1 + RFPPZx/2
set
X 0.85 x RFPPZx x tan (LdAngle)
R 0.85 x RFPPZx
X RLdFwd x tan (LdAngle)
R RLdFwd
X 0
R RLdFw
X –0.2143 x RFPPZx/2
R 0.8 x RFPPZx/2
X –0.4 x RLdFwd x
tan(ArgDir=20°)
R 0.4 x RLdFwd
© Copyright 2017 ABB. All rights reserved
3
4
5
(O/phase)
R
13
c
20°
ANSI05000368-1-en.vsd
Comments
LdAngle = angle for the maximal load transfer
Exact: 0.8 x RFPPZx/2 (ArgDir=20°)
Testing functionality by secondary injection
Section 11
119