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Over-current and earth-fault relay SPAJ 140 C

SPAJ 140 C is used for the selective short-circuit and earth-fault protection of radial feeders

The combined over-current and earth-fault relay SPAJ 140 C is used for the selective short-circuit and earth-fault protection of radial feeders in solidly-earthed, resistance-earthed or impedance-earthed power systems. This integrated protection relay includes an over-current unit and an earth-fault unit with flexible tripping and signalling facilities. These relays can also be used for other applications, which require single, two, or three-phase over-current protection. This combined over-current and earth-fault relay also includes a circuit-breaker failure protection unit.

Why ABB?
  • The most commonly used numerical protection relay on the market
  • Easy-to-use relay with the most essential functions for over-current and earth fault protection 
  • Proven technology 

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