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CU-Ps Primary Current Injection Test System

4.5 (2 reviews)

The CU-Ps primary current injection test set provides high current capabilities for commissioning and maintenance testing. Flexible, reliable, and efficient.

  • 20kVA 5 minutes output capability (higher overload currents for 1s)
  • Multi-function digital timing system
  • 5000A and 6000A loading units
  • Separate control and loading units
  • Secondary injection up to 100A
  • Direct reading CT ratio and polarity
  • True RMS metering with 1 cycle capture
  • Data storage to USB memory key including waveform & harmonics
  • USB keyboard interface


Introducing the CU-Ps Primary Current Injection Test System, an exceptional solution for high-current commissioning and maintenance testing. This system offers unmatched flexibility with separate control and loading units. The control unit, housing all control and metering circuitry, seamlessly connects to the loading unit through dedicated cables.

Choose between two loading units, delivering 5000A or 6000A for 5 minutes, or up to 10 or 12kA for brief intervals. Each loading unit has two outputs, allowing for convenient series or parallel connections. For example, the PLU-6k configuration achieves 3000A at 6.6V or 6000A at 3.3V.

Both the control and loading units feature rugged steel cases with castors and lifting handles, designed for durability in demanding environments. The compact design of the loading units allows for close positioning to the test object, minimizing power requirements.

The 20kVA-rated control unit offers advanced digital metering with a memory function for accurate readings. The system automatically shuts off the current when the device under test trips. For precise timing, the CU-Ps systems incorporate a high-accuracy timing system with 1ms resolution. The front panel provides clear status indications for contacts, and timing modes cater to various devices.

A true RMS memory ammeter with a liquid crystal display accurately measures AC output current. The current metering offers multiple ranges, including 10%, 50%, and 100% of the maximum rating. Additionally, the pulse mode enables a 200% metering range for specific settings.

The CU-Ps systems feature a flexible timing system with two contact inputs and five operating modes. LED indicators clearly display the status of each contact input, and the timing channels can be triggered by a DC voltage. The maximum attainable current depends on the impedance of the test object and output leads.

Effortlessly store test results using the included USB memory key. The system has a real-time clock for accurate time and date stamping. By entering comments with the optional keyboard and selecting AUTO STORE, essential parameters are automatically added to a spreadsheet file on the USB key. Access and review results on the display or connect the USB key to a PC for further analysis.

The CU-Ps Primary Current Injection Test System and loading units comply with strict safety standards. Equipped with electronic trips, circuit breakers, fuses, and thermal protection, this system ensures safety and reliability. It proudly bears the UKCA mark and meets the requirements of BS EN61010.

Our partners, including AcutestAlpha ElectronicsCuthbertson LairdNorwich Instrument Services, and PASS Ltd offer CU-Ps Primary Current Injection Test System in the United Kingdom. If you are based outside of Great Britain, you can order the product through our worldwide distribution network.

CU-Ps Operating Manual


CU-Ps Datasheet


Additional information

Weight110 kg
Dimensions660 × 400 × 740 mm
Supplied Accessories

User manual
Calibration Certificate
Spare fuses
Mains lead
Power i/connect lead
Metering lead
Low current leads
100A lead set4LU right angle plates
LU fixing bolts
USB keyboard
USB stick

2 reviews for CU-Ps Primary Current Injection Test System

  1. Le Minh Chau

    Great product, rather large in size but with 20KVA output capability it is exactly what we need.

  2. Tomás García

    Impressive instrument, it is very helpful that it can be wheeled around. Output leads can be a bit tricky to move around.

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