MEGGER MAGNUS STEP-UP TRANSFORMER permits you to prepare excitation curves for instrument transformers quickly and easily.

SKU: 5040

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The Megger MAGNUS Step-Up Transformer is a critical tool designed specifically for communications engineers and technicians working with instrument transformers. This lightweight yet powerful device plays a pivotal role in ensuring the reliability and accuracy of test instruments and protective relay equipment by verifying the outputs provided by instrument transformers during fault conditions.

Key Features of the Megger MAGNUS Step-Up Transformer

The MAGNUS step-up transformer excels in creating excitation curves for instrument transformers. These curves are essential for understanding how instrument transformers will behave under various electrical conditions, ensuring that they operate correctly during actual fault events. This capability makes it an invaluable tool for maintaining the integrity of electrical safety and measurement systems.

Beyond excitation curve generation, the MAGNUS is adept at demagnetizing current transformer cores, a crucial maintenance function that helps prevent residual magnetism from affecting transformer performance. Additionally, the device can be used to conduct turn ratio tests on voltage transformers, further broadening its application in the field of transformer maintenance and testing.

Despite its powerful output capabilities—delivering 1 A at 2.2 kV—the MAGNUS is designed with user safety in mind. It requires operation with both hands, which inherently focuses the operator’s attention and reduces the risk of accidental contact with live components. This dual-hand operation mechanism ensures that safety is maintained throughout the testing process.


Specifications are valid at nominal input voltage and an ambient temperature of +25°C, (77°F). Specifications are subject to change without notice.

  • Mains voltage : 115 / 230 V AC, 50 / 60 Hz
  • Power consumption : 2300 VA (max)
  • Protection : Fuses: F1, F2, F3 6 A Thermal cut-outs


  • Instrument : 356 x 203 x 241 mm (14” x 8” x 9.5”)
  • Transport case : 610 x 290 x 360 mm (24” x 11,4” x 14,2”)
  • Weight : 16.3 kg (35,9 lbs) 26.7 kg (58.9 lbs) with accessories and transport case
  • High voltage cables : 2 x 10 m (33 ft) / 1,5 mm2, 5 kV
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Megger since 1889 is a leading global premium manufacturer of measurement and testing technology. Megger top priority has always been to make your everyday work easier and safer. As such, insulation testers, micro-ohmmeters, and multimeters are among the long line of Megger inventions, making this brand one of the pioneers in the electrical industry. Megger products combine many years of experience and the valued feedback from our global users with the inventiveness and conscientiousness of our product developers. In Germany, we manufacture at three sites, Aachen, and Baunach near Bamberg and Radeburg near Dresden. Other manufacturing locations are based in Sweden, England, and America.


Data Sheet

Data Sheet


Specification Category Specification Detail
Mains Voltage 115 / 230 V AC, 50 / 60 Hz
Power Consumption 2300 VA (max)
Protection Fuses: F1, F2, F3 6 A Thermal cut-outs
Dimensions – Instrument 356 x 203 x 241 mm (14” x 8” x 9.5”)
Dimensions – Transport Case 610 x 290 x 360 mm (24” x 11.4” x 14.2”)
Weight 16.3 kg (35.9 lbs), 26.7 kg (58.9 lbs) with accessories and transport case
High Voltage Cables 2 x 10 m (33 ft) / 1.5 mm², 5 kV