Transformatorius

Koopmann Transformatoren

We maintain an extensive in-house stock of approximately 210 oil and cast resin transformers covering a wide range of power ratings and voltage levels, many of which are available immediately or at very short notice.

These units can be accessed through our online database, which offers individually printable data sheets. The database is equipped with an internal search function and is updated daily for both input and output entries.

Thanks to our close relationships with various transformer manufacturers, we are also able to offer new transformers at optimised prices and lead times.

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Furthermore, as former employees of TRO Berlin (Transformatorenwerk Oberschöneweide), we specialise in the overhaul and repair of oil transformers in the power range from 50 kVA up to 63,000 kVA, with voltage levels between 6 kV and 110 kV.

We also offer our customers the conversion of transformers from conservator design to hermetically sealed design. As part of this process, the entire transformer is overhauled, which includes:

- Drying of the active part and transformer oil,
- New paint finish of the tank,
- New bracing of the active part,
- Conversion to Elastimold plug-in bushings upon request,
- Renewal of all gaskets,
- Final testing (winding resistance, voltage ratio and insulation resistance measurements) in our in-house electrical test field, including voltage withstand test.

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