T&D World Magazine

System Provides Transformer Protection

Beckwith Electric’s Transformer Protection System M-3311A provides protection, control, monitoring and user interface functions for two, three or four-restraint winding applications. The base unit includes restrained and unrestrained differential protection, overcurrent protection with harmonic voltage options, multiple set point groups, user-programmable logic schemes, thru fault monitoring, and a 512 record event log.

The M-3311A can be supplied with dual power supplies, enhancing overall reliability by allowing the relay to be supplied from a single source with redundant cabling and fusing, or from two different sources, either both DC or one DC and one AC source.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.