Outdated product since 2012, replaced by Relion^®

The combined overcurrent and earth-fault relay SPAJ 142 C is intended to be used for the selective short-circuit and earth-fault protection of radial feeders in solidly earthed, resistance earthed or impedance earthed power systems. The integrated protection relay includes an overcurrent unit and an earth-fault unit with flexible tripping and signalling facilities. The overcurrent and earth-fault relays can also be used for other applications requiring single-, two-, or three-phase overcurrent protection and sensitive earth-fault protection. The combined overcurrent and earth-fault relay includes a circuit-breaker failure protection unit.

The combined overcurrent and earth-fault relay SPAJ 142 C is part of ABB’s Substation Automation concept extending ABB’s solution for the control and management of electric power systems.