The unit has a range of outputs allowing injection of currents as low as a few mA and as high as 50A. Voltages up to 18V are available on the main outputs. Three true RMS metering ranges are provided, allowing the full scale of the meter and trip level to be set independently of the selected output. Industry standard safety connectors are used on all inputs and outputs for convenience, reliability and safety. The 50A-3PH is comprehensively protected by overcurrent, duty cycle and thermal trips, and keeps the user fully informed of any trip condition. Auxiliary outputs and inputs are fuse protected.
An auxiliary metering input is provided and can measure voltage, current, frequency, and the phase between any of the current outputs and an external voltage or current. The timing system is very flexible without compromising ease of use, allowing trip times, reset times and reclose times to be quickly measured to a high degree of accuracy. Two independently isolated contact inputs are provided, and the timing system may also be used as a stand-alone timer. The 50A-3ph can be used to test many types of single and three phase secondary protection including:
Over and under current relays
IDMT relays
Auto-reclosers
Time delay relays
Earth fault relays
Miniature circuit breakers
Power relays
Tripping relays
Thermal relays
Features
0-50A three phase output
Clear and simple user interface
3 phase current output
0-50A per phase output current
True RMS digital metering
Memory ammeter
Multi-function timing system
Auxiliary metering input
Large back-lit liquid crystal display
Thermal and over-current protection
Compact and portable
220V or 400V 3 phase mains supply options
115V-440V 3 wire supply with optional supply transformer