ABB Relion 670 Series Applications Manual page 57

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1MRK 505 370-UUS Rev. K

The IED is intended for busbar protection applications in big substations where dynamic Zone

Selection, quite large number of binary inputs and outputs and many CT inputs are needed. The IED

includes two differential zones and twenty-four CT inputs. Note that binary inputs can be shared

between phases by including the LDCM communication module. This simplifies panel wiring and

saves IO boards.

This version can be used with external auxiliary 3-phase to 1-phase summation current transformers

with different turns ratio for each phase.

Busbar protection REB670

Application manual

Configuration

Relion reb670