Novel concept for medium voltage circuit breakers using microswitches

George G. Karady, G. T. Heydt

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This letter presents a new concept for circuit breakers (CBs) using microelectromechanical switches (MEMS). The building block is a switching unit, including a micro-switch shunted by a diode. Several switching units are connected in series and in parallel to form a switching string assembly. The opening of the mechanical switches transfers the current to the diodes. The diodes interrupt the current at the first zero crossing. The use of micro-switches miniaturizes the CB and assures arc less current interruption by the end of the first half cycle.

Original languageEnglish (US)
Pages (from-to)536-537
Number of pages2
JournalIEEE Transactions on Power Delivery
Issue number1
StatePublished - Jan 2006


  • Circuit breaker
  • Current interruption
  • Microelectromechanical switch
  • Switching string
  • Zero current switching

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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