ABB Relion 670 Series REL670 - Page 116

X1+XN
X
R (Ohm/loop)
50%
80%
1
2
3
4
5
6
7
8
9
10
11
80% of RLdFw
40% of RLdFw
RFPE
12
13
c
b
=
A
r
g
L
D
alt. 80% of
RFPE (Load
encroachment)
120°
20°
a
IEC05000369-3-en.vsd
IEC05000369 V3 EN
Figure 25: Distance protection characteristic with test points for phase-to-earth
measurements
Table 28 is used in conjunction with figure 25.
Table 28: Test points for phase-to-earth L3-E (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 +RFPE
set
4 X 0.5 x (2 x X1
set
+ R0
set
)/3
R 0.5 x (2 x R1
set
+R0
set
)/3 + RFPE
set
5 X 0.85 x RFPE
set
x tan(ArgLdset) ArgLd = angle for the maximal load
transfer
R 0.85 x RFPE
6 X RLdFwset x tan(ArgLdSet)
R RLdFw
set
7 X 0
R RLdFw
set
8 X –02143 x RLdFw
set
Exact: 0.8 x RFPE x tan (ArgDir=20°)
R 0.8 x RLdFw
set
Table continues on next page
Section 10 1MRK 506 355-UEN A
Testing functionality by secondary injection
110 Line distance protection REL670 2.1 IEC
Commissioning manual