M-0390 Syncrocloser® Check Plus Relay

Please Note: As of 12/31/2022, Beckwith Electric will no longer be manufacturing the M-0390 Syncrocloser® Check Plus Relay.

  • Beckwith will accept orders for these products until 8/31/2022 and all products ordered must ship before 12/31/2022.
  • Please contact us to request a quote and place orders.
  • This product may have an alternative replacement product, M-7651A, depending on your application needs. Please contact us for details.


The M-0390 Syncrocloser® Check Plus Relay is used as a permissive relay for secure reclosing of a circuit breaker by verifying that voltage and phase angle conditions are within pre-set limits before allowing the breaker to close. The M-0390 uses phase angle/slip frequency to verify synchronism to provide rapid restoration with the smallest possible angle settings. It is a panel-mounted, direct upgrade for G.E. IJS and SLJ, and Westinghouse CVE relays.

  • Panel mounted G.E. IJS and SLJ or Westinghouse CVE replacement.
  • Accurate, independent phase, time, voltage and delta F functions
  • Transducer and status outputs are standard features
  • Modular construction allows cards to be removed while unit is installed
  • Dead line/dead bus close capability is standard
  • Does not require a separate power source
  • Complete test and checkout from front panel
  • 20A output relay contacts open 0.9A inductive as 125V dc
  • Temperature range of -40° to +80° C