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Free Breathing Transformer

The free breathing transformers are equipped with a cushion under the cover or a conservator to allow the oil to expand, at the temperature variations. As it is not hermetic, the oil is always in contact with the air. Moisture is kept at bay through the use of dehydrating salts contained in special filters (breather). The tank can be in finned or with radiators. This design applies to all powers, but especially from 4000 kVA and up. For higher powers and to avoid contact between the oil and air, a rubber separator (rubber bag) or a nitrogen cushion is used.

Power 50 kVA – 50MVA
Voltage Class 1.1kV – 145kV
Material temperature classes A , F
Environmental temperature -60 a + 60
winding materials aluminium or copper
Oil Mineral, silicone, ester or vegetable type
Accessories Overpressure valve, thermometer, oil level, anti-vibration device, protective boxes
Strengths Outdoor installation for any environment, even if aggressive, low maintenance compared to the hermetic transformer, easy to fill with oil

 

News

Supply of transformers to Algeria

  • 2 February 2018

PUMPING OIL plant built by a leading Italian company in the Oil and Gas industry   GBE SpA has recently completed the supply of 4MVA oil transformers for a prestigious plant for the powering of twin-screw pumps for the Algerian state company. The contract was implemented in collaboration with a major Parma-based company operating in the […]

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Hydromatters 4.0

  • 17 October 2017

Participation of GBE at the hydroelectric conference in Italy The prestigious annual conference entitled Hydromatters 4.0. recently took place in Padua. GBE SpA with the speaker Eng. Fabio Cavestro illustrated the constructive design used for transformers and reactors subject to occasional, continuous and severe mechanical vibration. During the seminar two types of installation were highlighted […]

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Bunds for oil-filled Transformers

  • 10 July 2017

A flexible, easy-to-use solution designed by GBE Bunds for oil-filled transformers are a new product developed by the GBE steelworks department. For those installations where this bund has not been included, GBE has developed an extremely flexible solution, designed to protect the environment. The oil bund has been developed in pickled and subsequently galvanized metal […]

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