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TRAN-203 Serie – 20A / 250V Three-phase transformer analyser
With the TRAN-203 Series you get a powerful and reliable instrument for testing transformers – both three-phase and single-phase.
It is designed for fast and precise measurement of key parameters such as turns ratio, winding resistance, and temperature,
featuring additional functions like demagnetization and direct reporting via the built-in printer.
Ideal for inspection, maintenance, and quality control of transformers in substations and industrial environments.
The TRAN-203 Series combines turns ratio measurement, winding resistance testing, phase angle, and demagnetization in one powerful system.
With test currents up to 20 A DC, automatic vector group detection, and a built-in printer, you have a complete solution for transformer analysis – both in the workshop and out in the field.
Why choose the TRAN-203?
The TRAN-203 offers a complete analysis tool for transformers: fast, reliable, and easy to use.
It helps you prevent unexpected failures, document measurements instantly, and work flexibly – whether in your workshop or on-site.
What does the TRAN-203 measure?
- Turns ratio – measures the transformer’s voltage ratio in both three-phase and single-phase configurations.
- Winding resistance – measures at high test currents (up to 20 A DC) to verify winding integrity and low resistance conditions.
- Heat-run / temperature rise test – simulates operating conditions and monitors transformer heating under load.
- Demagnetization – removes residual magnetism before further testing, improving measurement accuracy.
- Automatic vector group detection, polarity check, and phase angle measurement – providing extra assurance of correct test setup.
Key advantages
- Turns ratio measurement – range from 0.8 to 50,000, suitable for CTs and PTs.
- Winding resistance testing – up to 20 A DC, suitable even for large power transformers.
- Temperature rise test – simulate load conditions and monitor temperature behavior.
- Demagnetization function – removes residual flux for more accurate results.
- Automatic vector group detection and phase angle measurement (accuracy ±0.2°).
- Built-in printer – print results immediately on-site.
- Optional Li-Ion battery – fully portable operation, independent of mains power.
Answer your questions
Are your test systems calibrated upon delivery?
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Are there licence fees for the software?
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Can IONIO advise me which standard to apply?
Is a high-voltage test dangerous?
What is a hipot test
Gijsbert from IONIO will be happy to help.
At IONIO, we not only supply advanced testing and measurement systems, but also offer clear and expert advice to optimise the testing of your product. Find out how we can improve your business processes. A consultation can be scheduled in no time!
