Instrument transformers and sensors

Hidden out of sight, current and voltage transformers and sensors installed in a wide range of high-, medium- and low-voltage equipment provide essential data for the supply and transmission of electrical energy.

Zelisko instrument transformers are available in a wide range of designs for indoor and outdoor applications. For over 60 years, these high-precision, maintenance-free instrument transformers have been successfully deployed around the world in all kinds of weather conditions. Zelisko is playing a role in the energy transition by supplying current and voltage sensors for automated transformer substations in medium-voltage smart grids.

Zelisko products combine know-how built up over many decades with innovative engineering and product development, as illustrated by its highly automated epoxy-resin casting process for medium-voltage grid insulation. The company also supplies bespoke products for special applications. And it goes without saying that short, reliable lead times are standard.


Dr. techn. Josef Zelisko, Fabrik für Elektrotechnik und Maschinenbau Gesellschaft m.b.H.

Beethovengasse 43-45
2340 Mödling
Österreich - Austria

Phone: +43 2236 409 2352


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