10.4.2 Distance protection zone, quadrilateral characteristic
ZRWPDIS
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Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings".
Values of the logical signals for ZRWPDIS are available on the local HMI under
Main menu/Test/Function status/Impedance protection//
DistanceProt2Ph(21,Z<)/ZRWPDIS(21;Z<):1.
The Signal Monitoring tool in PCM600 shows same signals that are available on
the Local HMI.
10.4.2.1 Verifying the signals and settings
Testing the underimpedance starting element
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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 figures mentioned below. In cases where the load encroachment
characteristic is not activated, tests according to the adjusted figures should be
carried out.
To verify the settings, the operating points according to the following fault types
should be tested:
• One phase-to-earth fault
• One phase-to-phase fault
Set Operation to On always to check for performance of distance protection during
testing.
Solidly earthed system
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1. Select type of earthing system by setting parameter SystemEarthing and set to
Solidly.
2. Select CharStartZ< to Circular and set OpLoadEnch to On.
3. Set Z1CircleStart, REOverRLStart, XEOverXLStart, LineAng and ArgLd to
default values. Also, set RLd such that its value is lower than Z1CircleStart.
Phase-to-earth fault - circular characteristic
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Section 10 1MRK 506 377-UEN C
Testing functionality by secondary injection
82 Railway application RER670 2.2 IEC
Commissioning manual
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