M-0390

M-0390 Syncrocloser® Check Plus Relay

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

 

Inputs

  • Line voltage, nominal 120 V ac, 150 V ac maximum continuous. Will withstand 200 V ac for 1 sec.
  • Bus voltage, nominal 120 V ac, 150 V ac maximum continuous. Will withstand 200 V ac for 1 sec.
  • Enable Sync-Check (by closing contact*).
  • Open circuit voltage = 10 to 15 V dc; closed circuit current = 0.02 to 0.04 mA dc.
  • NOTE: One input must be greater than 100 V ac to ensure the Output Relay will close. Enable Dead Closing (by closing contact*).
  • NOTE: Requires use of gold-plated contacts located close to the unit or a permanent jumper on the back of the unit.

Burden

  • Whichever input voltage is high, 4 VA; other input, 1 VA.

Controls

  • PHASE LIMIT: 0 to ±45° or 0 to ±90° (switch selectable), dial accuracy ±5% of full scale.
  • TIME LIMIT to close after PHASE LIMIT OK: 0 to 1.5 sec. or 0 to 15 sec. (switch selectable), dial accuracy ±10% of full scale.
  • ΔF LIMIT: 0.01 to 0.5 Hz, dial accuracy ±5% of full scale.
  • UPPER VOLTAGE LIMIT, either input: 110 to 140 V ac, dial accuracy ±5% of full scale.
  • LOWER VOLTAGE LIMIT, either input: 90 to 120 V ac, dial accuracy ±5% of full scale.
  • DEAD LIMIT: 10 to 90 V ac, dial accuracy ±10% of full scale.