ONLINE CIRCUIT BREAKER CONDITION MONITOR


System

  • Contact wear calculated via I2T or IT algorithms, using precise measurements.
  • Provides online timing for trip coil circuit and latch, arc duration, clearing time, and mechanical travel.
  • Monitors "52a" and "52b" circuit integrity.
  • Counts total operations and the time between operations.
  • Works with all single and three phase breakers, including oil, gas and vacuum types.
  • Functions with all voltage levels.



A. SPECIFICATIONS:

  • POWER SUPPLY
    Nominal Input Voltage: 115 or 230 VAC 20% Power Dissipation: 10 W maximum
  • CURRENT INPUTS
    VA Burden @ 20% Full Scale: 0.1 VA Continuous Input Current: CT Full Scale Rating
  • Full Scale Peak Current: CT Full Scale Rating Maximum Peak Input Current: 200% Full Scale for 1s Isolation to Enclosure: 2500 Vrms Isolation to Phases: 2500 Vrms
  • CURRENT TRANSFORMERS
    Ranges: 0-20, -30, -50, -100, -160 Amps
    Accuracy: 5% Full Scale
    AUXILIARY CONTACT INPUT
    Auxiliary Control Signal: 48 to 250 Volts DC
    Input Resistance: 16 kOhms
    Isolation to Enclosure: 1500 Vrms
    Isolation to Phases: 2500 Vrms
    Auxiliary to Main Contact Timing: -50 to +100 mS AD Delay*
  • CURRENT DATA ACQUISITION
    Measurable Arc Duration: 7 to 16 Cycles (* controlled by AD Delay)
    Line Frequency: 50 or 60 Hz, programmable Sampling Rate Per Phase: 32 Times Line Frequency
  • RELAY OUTPUT
    2 each, Form C: 3A at 250 VAC or 30VDC
    Isolation: 1500 Vrms
  • ANALOG OUTPUT (Optional)
    I2T percent or limit: 0-1 mA, 10 kOhm max burden
  • SURGE WITHSTAND
    Exceeds: IEEE 472-1974 & ANSI C37.90a
  • USER INTERFACE
    Panel Lamps: Power, Breaker Position, Danger, Warning, Alarms, and Percent Wear
    Computer Port: RS-232, ASCII format
  • OPERATING ENVIRONMENT
    Temperature: -20 to +150F (-28 to 65C)
    Humidity: 85% non-condensing, maximum
  • WEIGHT AND DIMENSIONS
    Shipping Weight: 16.5 kg (7.5 lbs)
    Dimensions: 18.4L x 14.6W x 7.62H cm (7.25L x 5.75W x 3.00H in.



B. Features

  • Visual, digital, and analog outputs available atthe breaker or inside the control house
  • RS-232 port for remote HMI
  • Can be connected to data concentrator, modem, wireless or other communication systems
  • Convertible to RS-485
  • Easy, non-intrusive installation and simple programming
  • Rugged, robust utility-style construction for long life and carefree operation
  • Low capital cost, low installed cost, rapid ROI
  • No calibration required



C. Applications

  • Transmission, distribution and generator breakers
  • Determining scheduling of main contact replacement
  • Wherever critical timing information is needed