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

Three-phase Transformer Type DTM


Input voltage: 3 x 400V
Link group: Yyn0 with shielding
Output voltage: 3 x 230V
Protection class: IP 00
Insulation class: B
Ambient temperature: 40 ° C
Max output current: 3 x 20.1 A
Frequency: 50-60 Hz
Power range: 3.0.kVA – 8 kVA
Short circuit voltage <3%
No-load current <3%
Input current <12 times nominal current
Protection class II

Three-phase Transformer Type DTM

Within the range of up to 1,500 kVA, OpenSupply provides three-phase transformers with an input voltage up to 1000 V and a design and construction that comply with EN 61588 or VDE 0570, as well as other quality standards, such as UL / CSA.

OpenSupply carries a number of designs that are suitable for a multitude of applications, while top-quality materials and vacuum impregnation are applied in their construction.



To provide power to electrical circuits or equipment used in medical rooms (e.g. in bedrooms, examination rooms, operating theaters, etc.).

Insulating transformers are preferably used in IT systems for (application) group 2 medical areas. The transformer must not be able switch off automatically and must comply with the standard for stationary installation in protection class II (without protective conductor and with double or reinforced insulation of all its components). This transformer is also available on request in protection class I, which must be stated explicitly when the order is placed.


Open design (IP 00, installation max. IP 23)
Coils separated by shielding and double / reinforced insulation (safe separation)
Spatial requirements according to DIN 41308
Secure connections with screw terminals according to VBG 4 (additional plug connection on request)
Top-quality, tropical vacuum impregnation using black polyester impregnating resin
Wear-proof, heat-, UV- and solvent-resistant type plate

Special versions

  • With low input current (8-fold) similar to the old VDE 0107 standard
  • Version available in protection class I
  • Extended power range (0.5 kVA – 10 kVA)
  • Extended input voltage range (max. 1000 V AC)

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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