MBCI Pilot wire differential
protection relay
• High stability for through faults
• High speed operation for in-zone faults
• Simultaneous tripping of relays
at each line end
• Low current transformer requirements
• Low earth fault settings
• Designed for the unit protection of
overhead and underground feeders
• Suitable for pilots up to 1k© or 2.5k© with
pilot isolation transformers
• Four electrically separate contacts
• Can be used as definite time overcurrent
relay in the event of pilot failure