ABB Relion 670 Series Commissioning Manual page 130

Section 11
Testing functionality by secondary injection
X1set
ANSI05000368 V2 EN-US
Figure 35:
Table 30:
Test point
1
2
3
4
5
6
7
Table continues on next page
124
The figures illustrating the characteristic for the distance protection function can be used
when the load encroachment affects the zone characteristic and when it is not. The solid
lines designate the diagram applicable when the load encroachment is overlapping with
the zone. All the test points except 13 are valid for this case. When the load
encroachment does not overlap with the zone, the dotted lines and test point 13 are
valid. Test points 5, 6, and 7 are not valid for this measurement however.
X
2
1
11
10
12
9
8
25% of RFPPZx/2
50% of RFPPZx/2
RFPP/2
Distance protection characteristic with test points for phase-to-phase measurements
Test points for phase-to-phase loops A-B (Ohm/phase)
Reach Set value
X X1
set
R 0
X X1
set
R R1
set
X 0.8 x X1
set
R 0.8 x R1 + RFPP/2
set
X 0.5 x X1
set
R 0.5 x R1 + RFPP/2
set
X 0.85 x RFPP/2 x tan (LdAngle)
R 0.85 x RFPP/2
X RLdFwd x tan (LdAngle)
R RLdFwd
X 0
R RLdFw
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80%
3
50%
4
5
ArgLd
6
(Ω/phase)
R
7 13
ArgDir
ANSI05000368-2-en.vsdx
Comments
If RLdFwd < 0.85 x RFPP/2
If RLdFwd < RFPP/2
If RLdFwd < RFPP/2
1MRK 504 165-UUS Rev. J
Transformer protection RET670
Commissioning manual