Global site

ABB's website uses cookies. By staying here you are agreeing to our use of cookies. Learn more

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


Not active product since 2016

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.

Scope

  • Combined overcurrent and earth-fault protection

Product benefits

  • The most commonly used numerical protection relay on the market

Product features

  • Easy-to-use relay with the most essential functions for over-current and earth fault protection
  • Proven technology
  • Three-phase, low-set phase overcurrent unit with definite time or inverse definite minimum time (IDMT) characteristic
  • Three-phase, high-set phase overcurrent unit with instantaneous or definite time operation
  • Low-set earth-fault unit with definite time or inverse definite minimum time (IDMT) characteristic
  • High-set earth-fault unit with instantaneous or definite time operation
  • Built-in circuit-breaker failure protection
  • Self-supervision system continuously monitoring the operation of the electronics and the microprocessor

Are you looking for support or purchase information?

Loading documents

Related offering