4. Set Characteristic to IEC Def. Time.
5. Set tDef_OC to 6000.00 s, if no trip of the overcurrent stage is required.
6. Set VDepFact to the value 100% in order to ensure that the start value of the
overcurrent stage is constant, irrespective of the magnitude of the generator
voltage.
7. Set Operation_UV to On to activate the undervoltage stage.
8. Set StartVolt to the values 70%.
9. Set tDef_UV to 3.0 s.
10. Set EnBlkLowV to Off (default value) to disable the cut-off level for low-
voltage of the undervoltage stage.
The other parameters may be left at their default value.
Section 9 1MRK 506 369-UEN B
Current protection
532 Line distance protection REL670 2.2 IEC
Application manual
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