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 +150ºF (-28 to 65ºC)
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