Application

The combined overcurrent and earth-faultrelay SPAJ 140 C is intended to be used forthe

selective short-circuit and earth-fault pro-tection of radial feeders in solidly earthed,

resistance earthed or impedance earthedpower systems.

The integrated protectionrelay includes an overcurrent unit and anearth-fault unit with flexible tripping

and signalling facilities.

The overcurrent and earth-fault relays can also be used for other applica-tions requiring single-,

two-, or three-phase overcurrent protection.

The combined over.current and earth-fault relay includes a cir-cuit-breaker failure protection unit.

The combined overcurrent and earth-faultrelay SPAJ 140 C is pait of ABB’s Distribu-tion Automation

concept,which is a productsegment of Panorama, the complete ABBsolution for the control and

management ofelectric power systems.