SPAJ140C-AA is a combined phase current and neutral overcurrent relay manufactured by ABB. This relay is mainly used to protect the power system in the high current ground, resistance ground, neutral point is not grounded in the grid radiation feeder short circuit and ground fault. The following are the main functions and features of SPAJ140C-AA:
Selective protection: The SPAJ140C-AA protects the power system from damage by identifying the type and location of the fault and cutting off the faulty circuit when it occurs.
Modular design: The relay consists of an overcurrent element and a ground fault element, both of which have highly flexible tripping and signaling devices. This design allows the feeder protection to adopt single-phase, two-phase or three-phase overcurrent protection and directional ground fault protection according to the requirements of use.
Built-in circuit breaker failure protection: The relay also contains circuit breaker failure protection function, when the circuit breaker fails, the relay can start the protection mechanism to ensure the stable operation of the power system.
Wide range of application: SPAJ140C-AA is suitable for user terminal substations with voltage levels of 10kV and below, covering power, construction, office distribution network and other industries, suitable for overhead lines, cable lines, inlet and outlet cabinets and other scenarios.
Reliability and long life: The relay is manufactured with mature technology, has reliable performance and long life, and can ensure the stable operation of the power system.
Multiple specifications and options: The SPAJ140C-AA offers a variety of specifications and options to meet the needs of different users.
In general, SPAJ140C-AA is a powerful, stable performance of the combined relay, suitable for a variety of power system applications, for the stable operation of the power system to provide a reliable guarantee.
