+31 (0)541 700 260 erik@opensupply.nl

Insulation transformer Type E-UL (ETKU)


Input voltage 200/220/240/360/380/400/420/440/460/480/500/530/550 V
Vector group IIii0
Output voltage 2 x 115 V for optional series / parallel connection
Protection class IP 00
Insulation class B / F
Ambient temperature 40 ° C
Frequency 50-60 Hz
Power range 160 VA – 5600 VA
Protection category I

Insulation transformer Type E-UL (ETKU)
Single or three-phase transformers are essential elements for the operation and safety of electrical applications. They are manufactured and assembled by OpenSupply on the basis of the EN 61558-2-20 requirements, with high-quality vacuum impregnation using black polyester resin, and special core assemblies. OpenSupply produces network, commutation and reactors.



  • Open design (IP 00, installation max. IP 23)
  • Coils separated by double / reinforced insulation (safe separation)
  • With higher demands on test voltages and crawl spaces, since these transformers are exposed to regular overloads
  • Secure connections with screw terminals according to VBG 4 (additional plug-connection on request)
  • High-quality, tropical vacuum impregnation in black polyester resin
  • Wear-proof, heat-, UV- and solvent-resistant type plate
  • Special designs available upon request
  • Also available with CSA marking (CSA 255 319)


  • Insulation transformers for general applications, e.g. as transformers for devices according to VDE 0700, 0750, 0805.
  • For the supply of circuits in switching installations, distributions, machines, etc., in accordance with VDE 0113.
  • Adaptable on the input side to 13 different mains voltage values.
  • Built according to UL insulation class B, so no power reduction to VDE values ​​is required
  • Suitable for building UL-labeled control boxes according to the UL 508A directive

A number of reasons to collaborate with OpenSupply:

  • OpenSupply has extensive technical expertise
  • That makes OpenSupply a reliable and valuable supplier
  • OpenSupply also offers a wide range of products / accessories
  • That is why OpenSupply is always a useful addition to your network

Any questions?

If you want to know more about this product (or about the other products in the OpenSupply range), contact us today. We are happy to help you make the right choice in your specific circumstances.

Erik Franke


+31 541 700260

We will do our best to answer withing 24 hours.

Have a question? Please feel free to contact OpenSupply.

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