Microprocessor-based time-overcurrent relay - MICRO-51

MICRO-51 microprocessor-based overcurrent relays are used for phase and ground overcurrent protection in utility, industrial and commercial electrical power systems.

The Micro-51 operates from conventional 5A or 1A secondary current transformers. The relay is self-poered from the current, therefore, there is no continuous drain on the control voltage supply. Settings are made by front panel switches.

Why ABB?

  • Relays for different application ranges
  • Range from simple protection relays used as back-up protection to specialized relays
  • Relays for both well-established proven technologies and for modern technology
  • Optional arc detection

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