Application Manual - ABB REL650 Applications Manual

Section 3
REL650 setting examples
88
7. Use the setting INDirPU when OpModeSel is set to 3I0 and fi
8. Use the setting SN_PU when OpModeSel is set to 3I03V0Cosfi
9. Set TimeChar to IEC Def.Time
The setting TimeChar gives the time characteristic of the sensitive residual
overcurrent protection. Definite time delay as well as different types of time inverse
time delay characteristics can be chosen. Definite time delay is chosen.
10. Use the setting tDef for the definite time delay of the protection function.
The setting is depending on the setting of other sensitive residual current protections
in the system. Often pure time selectivity is used. As the fault current is relative small
and independent of the fault point relatively long trip delay can be accepted.
11. If required for the protection, use the available non-directional residual overcurrent
function EF4PTOC (51N_67N) as well as the residual overvoltage function
ROV2PTOV (59N).
1MRK 506 334-UUS A

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