M-0359

M-0359 Syncrocloser® Check Plus Relay

The M-0359 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-0359 uses phase angle/slip frequency to verify synchronism to provide rapid restoration with the smallest possible angle settings without a time delay. Analog outputs of phase angle, bus voltage, line voltage, DV and DF are provided for SCADA system interface.
Enhances system stability when applied to transmission and primary distribution reclosing schemes.

  • Detects a static phase angle across an open breaker in 0.5 sec. to assure a fast permissive for reclosure.
  • Simultaneously measures voltage magnitudes to ensure that they are within upper, lower, and difference limits.
  • Includes dead line/dead bus closing features.
  • Remote command widens the phase angle setpoint to respond to system emergencies or to narrow the setpoint of the two systems are isolated to close the breaker very close to 0°.
  • Transducer analog outputs are SCADA compatible.

Inputs

  • Power is derived from either the Line or Bus input, whichever is greater. Below 65 V, the low voltage detection circuitry will shut down the M-0359.
  • Line voltage, nominal 120 V ac, 145 V ac maximum continuous. Will withstand 240 V ac for 1 sec.
  • Bus voltage, nominal 120 V ac, 145 V ac maximum continuous. Will withstand 240 V ac for 1 sec.

Burden

  • Whichever input voltage is high, 11 VA; other input, 1 VA.

Controls

  • UPPER VOLTAGE LIMIT: 110 to 140 V ac either input, dial calibration accuracy ±2% of full scale.
  • LOWER VOLTAGE LIMIT: 90 to 120 V ac either input, dial calibration accuracy ±2% of full scale.
  • DELTA V LIMIT: 1 to 5 V, dial calibration accuracy ±5% of full scale. Other ranges available.
  • DEAD LINE LIMIT: 10 to 60 V, dial calibration accuracy ±7% of full scale.
  • DEAD BUS LIMIT: 10 to 60 V, dial calibration accuracy ±7% of full scale.
  • PHASE ANGLE LIMIT: 0 to ±30°, dial calibration accuracy ±5% of full scale. Other ranges available.
  • DELTA F LIMIT: 0.01 to 0.5 Hz, dial calibration accuracy ±5% of full scale.