Health & Safety

ISO 45001


ISO 14001

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Three-Phase Transformer Demagnetizer

The DEM60C is designed for demagnetizing the core of power, instrument or current transformer. It can be used to eliminate the source of potential problems such as, erroneous diagnostic, inaccurate measurements on a transformer, inrush current at a start-up of power transformer, incorrect operation of protective relays, which remnant magnetism can create.

DEM Series Brochure

Three-Phase Transformer Demagnetizer


The DEM60C provides an alternating current, needed for demagnetizing the transformers’ core, by internally changing the polarity of a controlled DC current. During the demagnetization process the instrument supplies a current at decreasing magnitude for each step. This is the UNIQUE device on the market.

  • Fully automatic demagnetization
  • Demagnetization currents 5 mA – 60 A DC
  • Demagnetization process graph
  • Automatic discharging circuit
  • Lightweight – 13,1 kg
Included accessories

  • DV-Win software
  • USB cable
  • Mains power cable
  • Ground (PE) cable
Recommended accessories

  • Current cables 4 x 10 m 10 mm2 with TTA clamps
  • Cable bag
  • Transport case
Optional accessories

  • Current cables 4 x 15 m 10 mm2 with TTA clamps
  • Current cables 4 x 20 m 16 mm2 with TTA clamps
  • Cable plastic case – medium size
  • Cable plastic case with wheels – medium size
  • Plastic transport case
  • Plastic transport case with wheels
  • Bluetooth communication module


The DV-Win software enables control and observation of the test process, as well as saving and analyzing the results on a PC. It provides a test report, arranged in a selectable form as an Excel spreadsheet, PDF, Word, or ASCII format. The software provides an OLTC (tap changer) condition assessment through analysis of the graphs representing dynamic resistance values during the tap changer transitions.

Additionally, the DV-Win measures and calculates the OLTC transition time, the ripple and the winding resistance for each tap changing operation.
The software can also perform the calculations necessary for the “Heat Run” test. All results can be exported in the report format.

The standard interface is USB. RS232 is optional.

Additional information

Weight 13.1 kg
Test current

5 mA to 60 A DC

Product Enquiry

Please contact our sales for the product information. E-mail : [email protected]