ABB RET670 Commissioning Manual page 141

1MRK 504 165-UEN A
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
Test point Reach Set value
6 X RLdFw x tan (ArgLd)
R RLdFw
7 X RLdFw x tan (ArgLd)
R 0
8 X –0.2143 x RFPPZx/2
R 0.8 x RFPPZx/2
9 X –0.4 x RLdFw x tan(ArgDir=20°)
R 0.4 x RLdFw
10 X 0.5 x X1
R –0.23 x X1
11 X 0.8 x X1
R –0.37 x X1
12 X 0.5 x X1
R 0.5 x R1
13 X 0
R 0.5 x RFPPZx
Table 32 is used in conjunction with figure 35.
11
X1Zx+XNZx
10
40% of RLdFw
80% of RLdFw
alt. 80% of
RFPEZx (Load
encroachment)
IEC05000369 V4 EN-US
Figure 36: Distance protection characteristic with test points for phase-to-
earth measurements
Table 33 is used in conjunction with figure 36.
set
set
set
set
set
set
X
2
1
80%
3
50%
4
12
5
120°
a
6
R (Ohm/loop)
7 13
9
20°
8
RFPEZx
IEC05000369-4-en.vsdx
Section 11
Comments
Exact: 0.8 x RFPPZx/2
(ArgDir=20°)
Exact –0.5 x R1 x
set
tan(ArgNegRes=30°)
Exact –0.5 x R1 x
set
tan(ArgNegRes=30°)
135