Not active product since 2009
The earth-fault relay SPAJ 110 C is designed to be used for selective earth-fault protection, either primary or back-up protection, in solidly earthed or low-resistance earthed power systems.
The relay has two protection stages: a low-set overcurrent stage I0 > and a high-set overcurrent stage I0 >>. The low-set stage operates with definite-time characteristic or with inverse-time characteristic, while the high-set stage operates with definite time characteristic only. The earth-fault relay is used both as primary and back-up earth-fault protection relay for feeders, transformers, generators and motors. The relay can be configured to cooperate with a residual voltage relay used for blocking/deblocking the operation of the earth-fault relay.
Scope
- Selective earth-fault protection, either primary or back-up protection, in solidly earthed or low-resistance earthed power systems
Product benefits
- Protection for a variety of power distribution applications
Product features
- Low-set neutral overcurrent stage with definite time or inverse time characteristic
- High-set neutral overcurrent stage with definite time characteristic
- Output relay functions to be freely configured
- Flexible adaptation to different types of application
- Serial interface for connecting the relay to a fiber-optic object bus and substation and network control systems
- Continuous self-supervision with auto-diagnostics of hardware and software
- Member of the SPACOM product family and ABB’s Distribution Automation system