The ABB REF610C11LCLR 60Hz is a Feeder Protection Relay used in medium-voltage (MV) power distribution systems at 60 Hertz (Hz) frequency.

• Overcurrent and Short Circuit Protection: Trips the circuit breaker if the current exceeds a predetermined safe limit, protecting the feeder cables and connected equipment from damage caused by excessive current flow.
• Ground Fault Protection: Detects faults where current leaks to the ground, preventing potential equipment damage and safety hazards.
• Phase Loss or Imbalance Detection: Identifies situations where one or more phases are missing or have significant current imbalance, which can indicate problems within the feeder or connected loads.

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