AREVAT&D announces a major evolution, with the MiCOM P547 Phase comparison protection now incorporating the proven technology of the sub-cycle distance MiCROMho P443, merged as one single device. This relay can be the standard in all HV, EHV line protection applications, duplicated where dual redundant main protection is demanded. Features include:

• Phase segregated phase comparison protection tripping.
• Protection of plain two ended and three-ended circuits, with in-zone transformers or tapped loads.
• Charging current compensation available at all times.
• Corona discharge compensation.

The combination of phase comparison protection, five zone distance protection and a phase segregated aided directional earth fault protection  provides a complete solution for any type of fault on the power system.