ABB REG670 - Page 155

50%
80%
1
2
3
4
5
6
7
8
9
10
11
80% of RLdFwd
40% of RLdFwd
RFPG
12
ANSI05000369-2-en.vsd
13
a
alt. 80% of
RFPG (Load
encroachment)
120°
20°
ANSI05000369 V2 EN-US
Figure 43: Distance protection characteristic with test points for phase-to-ground
measurements
Table 20 is used in conjunction with figure 43.
Table 20: Test points for phase-to-ground C-G (Ohm/Loop)
Test point
Reach Value Comments
1 X (2 x X1
set
+X0
set
)/3
R 0
2 X (2 x X1
set
+ X0
set
)/3
R 2 x R1
set
+ R0
set
)/3
3 X 0.8 x (2 x X1
set
+ X0
set
)/3
R 0.8 x (2 x R1
set
+ R0
set
)/3
+RFPG
set
4 X 0.5 x (2 x X1
set
+ R0
set
)/3
R 0.5 x (2 x R1
set
+R0
set
)/3 +
RFPG
set
5 X 0.85 x RFPG
set
x tan(LdAngleset) LdAngle = angle for the maximal load
transfer
R 0.85 x RFPG
6 X RLdFwdset x tan(LdAngleSet)
R RLdFwd
set
7 X 0
R RLdFwd
set
Table continues on next page
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 149
Commissioning manual