Feeder protection relay SPAA 342 C

Not active product since 2007

The feeder protection relay SPAA 342 C is used for the protection of radial isolated neutral networks or resistively and/or resonant earthed networks. The feeder protection relay provides time overcurrent protection, shortcircuit protection, sensitive earth-fault protection and phase discontinuity protection.


  • Comprehensive numerical feeder protection relay consisting of two multi-function protection relay modules and a flexible auto-reclose relay module

Product benefits

  •  Multi-functional protection functions

Product features:

  • Overall scheme comprising time overcurrent protection, short-circuit protection, phase discontinuity protection, sensitive non-directional earth-fault protection, directional earth-fault protection, general earth-fault supervision, auto-reclose facilities, circuit-breaker failure protection and circuit-breaker condition monitoring
  • Four heavy-duty relays for CB tripping and five current relays for signalling purposes
  • Double-pole or single-pole circuit-breaker control
  • Five configurable control inputs for the external control of the protection stages and the auto-reclose module
  • Remote control of the circuit breaker via the auto-reclose module
  • Local man-machine communication via push buttons and a digital display on the front panels of the protection relay modules
  • Serial interface for connecting the relay to higher-level data acquisition systems, local or remote control systems or other host systems
  • Local fault indication by LED indicators with memory functions and the digital display
  • High immunity to electrical and electromagnetic interference
  • Continuous self-supervision of relay hardware and software for enhanced system reliability and availability
  • Auto-diagnostic fault indication to facilitate fault location and repair
  • Powerful software support for parameterization of the relay, for reading measured and recorded values, events, etc., and for storing readings
  • Member of the SPACOM product family, ABB’s Distribution Automation system and ABB’s Panorama concept
  • CE marking according to the EC directive for EMC


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