Hitachi Relion 670 Series Commissioning Manual page 98

Section 11
Testing functionality by secondary injection
To verify the settings for the operating points according to the following fault types should be tested:
• One phase-to-phase fault
• One phase-to-ground fault
The shape of the operating characteristic depends on the values of the setting parameters.
X1set
ANSI05000368 V2 EN-US
Figure 23:
Table 21:
Test point
1
2
3
4
5
Table continues on next page
92
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.
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 L1-L2 (Ohm/Loop)
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 RFPP/2 x tan(AngLd)
R RFPP/2
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80%
3
50%
4
5
ArgLd
6
R (Ω/phase)
7 13
ArgDir
ANSI05000368-2-en.vsdx
Comments
1MRK506371-UUS Rev. M
Line distance protection REL670
Commissioning manual