Transformator

Koopmann Transformatoren

We maintain an extensive in-house inventory of approximately 210 oil and cast resin transformers covering a wide range of power ratings and voltage classes, many of which are available immediately or with very short lead times.

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

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

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

We also offer our customers the conversion of transformers from conservator-type to hermetically sealed design. In this context, the entire transformer undergoes a comprehensive overhaul, which includes:

- Drying of the active part and transformer oil,
- New paint system for the tank,
- New bracing of the active part,
- Optional conversion to Elastimold plug-in bushings,
- Replacement of all gaskets,
- Final testing (winding resistance, turns ratio and insulation resistance measurements) in our own electrical test bay, including voltage withstand test.

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