ABB RED670 Commissioning Manual page 130

Section 11
Testing functionality by secondary injection
Ensure that the maximum continuous current to the IED does not exceed four times its rated value, if the
measurement of the operating characteristics runs under constant voltage conditions.
The test procedure has to take into consideration that the shaped load encroachment characteristic is
active. It is therefore necessary to check the setting. To verify the settings with the shaped load
encroachment characteristic the test should be carried out according to figures and and tables and . In
cases where the load encroachment characteristic is activated tests according to the adjusted figures
should be carried out.
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 35:
124
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
80%
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
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3
50%
4
5
ArgLd
6
(Ω/phase)
R
7
13
ArgDir
ANSI05000368-2-en.vsdx
1MRK 505 378-UUS Rev. J
Line differential protection RED670
Commissioning manual