Not active product since 2009
The overcurrent relay SPAJ 131 C is designed to be used for two-stage phase overcurrent protection of distribution feeders, large low-voltage motors, high-voltage motors, medium-sized and large generators and power transformers. The relay can be used both as main protection relay and back-up protection relay.
The relay has two protection stages: a low-set overcurrent stage I> and a high-set overcur-rent stage I>>. The low-set stage has a definite time or an inverse-time operation characteristic, while the high-set stage has a definite time characteristic only.
The overcurrent relay is provided with five output relays, four of which are freely configurable for the desired function. Two of the output relays have heavy-duty contacts capable of directly operating a circuit breaker.
Scope
- Single-phase, two-phase or three-phase overcurrent protection
Product benefits
- Protection for a variety of power distribution applications
Product features
- Three-phase low-set phase overcurrent stage with definite time or inverse time characteristic
- High-set phase overcurrent stage with definite time characteristic
- Both overcurrent stages can be blocked by an external control signal
- Serial interface for two-way data communication over fiber-optic bus between relay and substation and/or remote control systems
- Continuous self-supervision of hardware and software, including auto-diagnostics