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T&R 50A-3PH mk2 Three Phase Secondary Current Injection Test Set

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The T & R 50A-3PH mk2 is a three phase injection system, allowing engineers to check the correct operation of protective systems.

Simple to use with clear interface with colour-coded sections, the 50A-3PH outputs 3 phase current up to 50A and has selectable output voltage of up to 18V. The system has three true RMS metering ranges, allowing the full scale of the meter and trip level to be set independently of the selected output.

This product is ideal for testing both single and three phase secondary protection such as over and under current relays, IDMT relays, auto reclosers, time delay relays, earth fault relays, miniature circuit breakers, power relays, tripping relays and thermal relays.

The 50A-3PH mk2 is equipped with an adjustable timing system with range of 0 to 999.999s. This function includes several starting modes, including internal start, single contact, dual contact and current operated.

An optional printer or PC can be connected to the 50A-3PH via a built-in RS232 port. This product’s link output also provides a phase lock reference for a DVS3 phase-shifting voltage source.

T & R 50A-3PH mk2 Three Phase Secondary Current Injection Test Set Key Features

  • Output three phase current from 0 to 50A
  • Simple to use with easy-to-understand interface
  • 0-50A per phase output current
  • True RMS digital metering
  • Memory ammeter
  • Multifunction timing system
  • Auxiliary metering input
  • Large-size backlight LCD display
  • Thermal and overcurrent protection
  • Compact, portable design

What’s Included?

  • T & R 50A-3PH Current Injector
  • Operating Manual
  • Output Lead Set
  • Mains Lead
  • Spare Fuse Set

Optional Accessories

These products are NOT included as standard. Please call for more information or to order these accessories.

  • Delta-Star Supply Transformer – allows operation from 115V, 230V, 400V and 440V 3 wire supplies
  • Filter Unit
  • Printer
  • Leadset Carry Case
Part Code229P

T & R 50A-3PH Technical Specifications

Main Output  
Range Continuous 5 Minutes 1 Minute
3.5V 16A 32A 50A
18V 4A 8A 12A
The above intermittent on times must be followed by an off time of 15 minutes, and are based on ambient temperature of 25°C
Range Resolution Trip Current Accuracy
5.000A 0.001A 5.25A ±0.6% rdg + 5d
20.00A 0.01A 21A ±0.6% rdg + 5d
50.00A 0.01A 52.5A ±0.6% rdg + 5d
Auxiliary Metering Inputs  
Setting Range Resolution Accuracy
Volts (AC) 270V 0.1V ±0.7% rdg + 5d
Amps (AC) 5.000A 1mA ±0.7% rdg + 5d
Phase ± 180° 0.1° ±3° -
Frequency 20 to 1000Hz 0.1Hz ±0.2% rdg + 1d

Further tech specs are available in the attached documentation.

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