ABB RET670 Commissioning Manual page 140

Section 11
Testing functionality by secondary injection
134
The figures illustrating the characteristic for the distance protection
function can be used for settings with and without load
encroachment. The solid lines designate the diagram applicable
when the load current compensation is active. The solid line and all
test points except 13 are valid for this case.
When the load current compensation is inactive, the dotted lines
and test point 13 are valid. Test points 5, 6, and 7 are not valid for
this measurement.
11
X1Zx
10
40% of RLdFw
80% of RLdFw
IEC05000368 V4 EN-US
Figure 35: Distance protection characteristic with test points for phase-to-
phase measurements
Table 32: Test points for phase-to-phase loops L1-L2 (Ohm/Loop)
Test point Reach Set value
1 X X1
R 0
2 X X1
R R1
3 X 0.8 x X1
R 0.8 x R1
4 X 0.5 x X1
R 0.5 x R1
5 X 0.85 x RFPPZx x tan (ArgLd)
R 0.85 x RFPPZx
Table continues on next page
X
2
1
80%
3
50%
4
12
120°
a
5
6
R (Ohm/phase)
7 13
9
c
20°
8
0.5 x RFPPZx
IEC05000368-4-en.vsdx
set
set
set
set
+ RFPPZx/2
set
set
+ RFPPZx/2
set
1MRK 504 165-UEN A
Comments
ArgLd = angle for the maximal load
transfer
Transformer protection RET670 2.2 IEC
Commissioning manual