On Load Tap Changers

For about 80 years now we have been manufacturing on-load tap-changers and we still keep coming up with epoch-making innovations.

The VACUTAP® series, just one example, with its vacuum switching technology for on-load tap-changers in oil-immersed and dry-type transformers. This is now the most common form of technology in reactor-type tap-changers and has revolutionised resistor-type tap-changers. We have been using this technology since the 1980´s and are continuously refining it thus bringing you advantages such as no service requirements before 150,000 to 500,000 switching operations, drastically reduced running costs for the whole physical life, increased availability of the transformer, no oil carbonization, no replacement of contacts and no oil filter systems – to mention but a few of the many benefits.

To a great extent the OILTAP® – program with its conventional tap-changer technology (arcing contacts in oil) and already well-known to you, is still available as an alternative.