Transformator

Koopmann Transformatoren

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

These units can be accessed via our online database, which features individually printable data sheets. The database comes equipped with an internal search function and is updated daily with respect to incoming and outgoing inventory.

Thanks to our close relationships with various transformer manufacturers, we are also able to offer new transformers at optimized prices and lead times.
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Furthermore, drawing from our experience as former employees of TRO Berlin (Transformatorenwerk Oberschöneweide), we specialize in the servicing and repair of oil-filled transformers within a power range from 50 kVA up to 63,000 kVA and voltage levels between 6 kV and 110 kV.

Additionally, we offer our customers the retrofit conversion of transformers from conventional conservator-type to hermetically sealed designs. In this process, the entire transformer is overhauled, including:

- Drying of the active part and transformer oil
- New paintwork for the tank
- Re-fastening of the active part
- Optional conversion to Elastimold plug-in bushings
- Replacement of all gaskets
- Final inspection (winding resistance, transformation ratio, and insulation resistance measurements) in our own electrical test bay, including voltage withstand test

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