Macey's Electrical - Servicing Electrical Utilities - A complete Network of Quality Equipment  
VLF and Cable Diagnostics Primary and Secondary Current Oil Testing Resonant and Impulse Test  
Insulation Test Cable and Fault Location High Voltage Transformer Test  

  Home | About Us | Contact Us | Site Map | All Products |
                                                                                   | T&R Test Equipment | Secondary Current Injection | Model 50A-3PH

   50A-3PH 3-Phase Current Injection System
  Product Links
  Primary Injection System
  Secondary Current Injection
  High Voltage AC Test Systems
  High Voltage DC Test Systems
  Data Sheet
  Data Sheet
  Related Products

Optional Delta-Star Supply









T&R Test Equipment is a market leader in the field of current injection equipment. The range includes secondary injection units with 50 Amp output capability up to 6000 Amps primary injection systems. All have true RMS metering, a flexible timing system, and an easy to understand user interface.

The 50A-3PH is a three-phase injection system providing commissioning and maintenance engineers with a flexible system for testing protective systems. It has an easy to understand panel layout and a simple user interface. The status of every function can be seen at a glance, and there are no complex menus to navigate.

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 closure 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.




  • Clear and simple user interface.
  • Three-Phase current output.
  • 0 to 50 Amps per phase output current.
  • True-RMS digital metering.
  • Memory ammeter.
  • Multi-function timing system.
  • auxiliary metering input.
  • Large back-lit Liquid Crystal Display (LCD).
  • Thermal and over-current protection.
  • Compact and portable.
  • 220V 3-phase or 400V 3-phase.
  • 115V to 440V 3-wire supply with optional supply transformer.



The unit has a range of outputs allowing injection of currents as low as a few mA and as high as 50 Amps. Voltages up to 18 volts 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. 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

Ordering Information

  50A-3PH-opt 1

3-Phase Current Injection System, supplied with:  Output Lead Set, Mains lead,
Spare fuse set, and Operating manual. (see included lead set description below)

  50A-3PH-opt 2

3-Phase Current Injection System, supplied with:  Output Lead Set, Mains lead,
Spare fuse set, and Operating manual. (see included lead set description below)

  Note: The 50A-3PH instrument is supplied with a lead set in a plastic case including 6 x 3 meter 4mm2 output leads   terminated in 4mm plugs, 2 x 3 meter, 2 x o.5 meter 2.5mm2 auxiliary leads terminated in 4mm plugs.


  Our Partners -- Your links to our Quality Products