Free Phone: 0800 485 990 (NZ)

Transformer Winding Resistance

By measuring a transformer's winding resistance from one HV transformer bushing to another, transformer resistance testing can reveal a great deal of information about the transformer.

In addition to the obvious faulted transformer winding (i.e., an open winding or shorted turn), subtler problems can be detected

Megger TAU3

True three-phase transformer winding analyser

The multifunction TAU3 streamlines transformer testing with a one-time connection for all tests, reducing reliance on multiple instruments and minimising testing time, helping you maximise productivity for fast and accurate maintenance decisions. In addition to routine polarity validation, turns ratio, winding resistance, and demagnetization tests, the TAU3 offers short-circuit impedance and efficiency tests with the same one-time lead connection. Guided by colour-coded leads and clamps with on-screen vectors that match the transformer nameplate, the easy-to-follow setup ensures the right result the first time…just click ‘start’ and let the patent-pending internal shorting and lead compensation do the work!  

Megger MWA

3-Phase ratio and winding resistance analyser

  • Combines TTR and resistance testing in one box - faster, more efficient testing
  • 55% smaller, 40% lighter than individual instruments
  • Only one set of leads required - lighter, smaller and less expensive
  • One test form - easier, faster to complete
  • Built-in demagnetisation

Megger TRAX

Multifunctional Substation Test System

  • Replaces need for multiple test sets
  • Saves time by eliminating need for multiple instruments learning
  • User-friendly interface reduces training and testing time
  • Portable and compact system components for easy shipping
  • State of the art measurement methods for advanced diagnostic testing