OMA Earth Fault Lockout / Loss of Vacuum

The OMA Earth Fault Lockout/Loss of Vacuum Relay has been designed and tested to AS/NZS 2081.4:2002 to monitor a power outlet of a power distribution centre and/or Distribution Control Box (DCB). The OMA Relay has an Ex [ia] un-powered component approval and an Ex [ib] system approval.


  • Electronic design
  • DIN rail or foot mount polycarbonate enclosure
  • LED indication for status
  • Functions normally for a period of two (2) seconds during extreme power dip or power loss
  • Certified as Intrinsically Safe