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Section 12
Testing functionality by secondary injection
12.4.2
110
Distance protection zones, quadrilateral characteristic
ZMFPDIS
Prepare the IED for verification of settings outlined in section
section
"Preparing for test"
Measure operating characteristics during constant current conditions. Keep the
measured current as close as possible to its rated value or lower. But make sure it is
higher than the set minimum operating current.
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
Figure 31
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-earth fault
The shape of the operating characteristic depends on the values of the setting
parameters.
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 operationLdCom parameter is set to On. This is the
default setting. The solid line and all test points except 13 are valid for
this setting.
When operationLdCom parameter is set to Off then the dotted lines
and test point 13 are valid. Test points 5, 6, and 7 are not valid for this
measurement.
in this chapter.
and
Figure 32
and
Table 12
1MRK502053-UEN B
"Requirements"
and
Table
13. In cases where
Generator protection REG670 2.0 IEC
Commissioning manual
and
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Troubleshooting
