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200A-3PH MK3 Secondary Current Injection Test Set

4.67 (3 reviews)

  • 0-200A 3 Phase output
  • Accurate true RMS digital metering
  • All outputs fully isolated
  • Multi-function 1ms resolution timing system
  • Auxiliary AC output
  • Electronic over-current protection
  • Test results storage on USB memory key


The 200A-3PH Mk3 Secondary Current Injection Test Set is a portable, compact, and versatile system for commissioning and maintenance engineers. It provides a flexible and easy-to-use solution for testing and timing protective relays, circuit breakers, and thermal overloads. The unit has a rating suitable for testing thermal trips and is equally adept at testing solid-state or electromechanical relays.

The timing system is flexible and accurate, allowing high precision measurement of trip times. The device may be timed using the NC or NO timer modes for units with auxiliary contacts. Meanwhile, devices with no auxiliary contacts may be timed using the current-operated mode. The 200A-3PH Mk3 is ideal for testing over and undercurrent relays, IDMT relays, thermal overloads, and magnetic circuit breakers.

The unit has three independent outputs, each for a phase. The output is isolated and independently variable, and it allows for the injection of currents up to 200A. The digital true RMS system with a 3.5 digit LED display meters the output. Illuminated push buttons switch the output on and off, while the current is set using three control knobs on the front panel. All ranges are continuously variable from zero, and a switched, isolated auxiliary 240V 50mA AC supply is available to power auxiliary control circuits.

The 200A-3PH Mk3 Test Set is protected by electronic overcurrent trips on the outputs, fuses on the contact input, mains input, and regulators. The unit is UKCA marked and designed to comply with BSEN61010. An earth terminal is provided for connection to a local earth. Subsequently, auxiliary AC output is fuse-protected.

Our partners, such as AcutestAlpha ElectronicsCuthbertson LairdNorwich Instrument Services, and PASS Ltd , offer the 200A-3PH Mk3 in the United Kingdom. Additionally, if located outside Great Britain, you can conveniently order the product through our worldwide distribution network.

200A-3PH Mk3 Operating Manual


200A-3PH Mk3 Datasheet


Additional information

Weight33 kg
Dimensions550 × 315 × 300 mm
Supplied Accessories

User manual
Calibration certificate
3 Phase mains lead
Spare fuses
Output leads
Low current leads
Orange leads case
USB keyboard
USB memory key

3 reviews for 200A-3PH MK3 Secondary Current Injection Test Set

  1. Felix Klein

    Does the job even though a bit heavy. Helps keeping fit as a bonus.

  2. Kim Min-jun

    Had one for more than 10 years now, still works with minimum maintenance.

  3. Maxim Ivanov

    I first stumbled across this instrument when working in France. Served me well and kept me safe while learning the ropes.

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