GE-ALSTOM TRANSACTION Effective 2nd November 2015, GE acquired Alstom’s energy businesses. The Alstom content available on this site is for information purposes only.
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Hermetik: the low-maintenance transformer

Hermetically sealed power transformers without oil conservator are Alstom’s field-proven answer to today’s needs. Thanks to the innovative design of the radiators, the oil expansion vessel is not needed and thus the oil is prevented from coming into contact with ambient humidity.

Service life is also increased with the use of a vacuum-switch on-load tap-changer (OLTC) that eliminates contact erosion. With minimal oil and OLTC aging rate, the hermetik does not require any particular maintenance or works over its service life, speeding up the return on your investment.