ABB REG670 - Page 160

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 45: Distance protection characteristic with test points for phase-to-ground
measurements
Table 22 is used in conjunction with figure 45.
Table 22: 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
+RFPGZx
set
4 X 0.5 x (2 x X1
set
+ R0
set
)/3
R 0.5 x (2 x R1
set
+R0
set
)/3 +
RFPGZx
set
5 X 0.85 x RFPGZx
set
x
tan(LdAngle
set
)
LdAngle = angle for the maximal load
transfer
R 0.85 x RFPGZx
6 X RLdFwdset x tan(LdAngleSet)
R RLdFwd
set
7 X 0
R RLdFwd
set
Table continues on next page
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
154 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual