Prepare the IED for verification of settings outlined in Section "Preparing the IED
to verify settings".
Before starting this process, all impedance measuring zones shall be set and in
operation. Test the outer resistive boarder in forward and reverse direction,
RLdOutFw
and RLdOutRv and the inner reactive boarder in forward and reverse
direction X1InFw and X1InRv. See figure
37.
The corresponding resistive border for the inner resistive boundary and outer
resistive boundary is calculated automatically from the setting of kLdRFw and
kLdRRv.
The inner zone of ZMRPSB must cover all zones by at least 10% margin.
The test is mainly divided into two parts, one which aim is to verify that the
settings are in accordance to the selectivity plan and a second part to verify the
operation of ZMRPSB. The proposed test points for validation of the settings are
numbered according to figure 37
Test of the interactions or combinations that are not configured are not considered
in this instruction.
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 141
Commissioning manual
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