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Hermetically Sealed Oil Filled Transformer

The hermetically sealed oil transformers are normally manufactured with a sealed tank equipped with fins that allow the expansion at the temperature variations. The tightness of the tank is up to 0.5 Bar. This type of transformer is the most widely used in the world. In the hermetically sealed transformer, the oil does not come into contact with the air and its electrical properties are therefore not compromised, ensuring a long life span of the transformer. For powers exceeding 3150kVA, or in case of a transformer with radiators, the transformer can still be hermetically sealed by means of a nitrogen cushion.

Power 50 kVA – 5MVA
Voltage Class 1.1kV – 52kV
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 even with aggressive environmental conditions; compact size for high voltages, excellent resistance to overvoltages in resonance

Applicazioni

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Installation of a Scott-T transformer with customised layout

  • 22 September 2015

A customised supply for one of the most innovative oil rigs in Europe GBE, a company capable of developing customized solutions covering all kinds of products, satisfying any installation need and managing also the machining processes internally, has played once again a strategic role in one of its recent supplies. For the Tempa Rossa plant, […]

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HIGHER ENERGY EFFICIENCY WITH THE NEW TRANSFORMERS GBE VOLT (Voltage Optimisation Local Transformer)

  • 8 July 2015

The economic and compact solution for adjusting the grid voltage, optimising the performance of the transformer and reducing losses In most countries in Europe (and around the world), the voltage of the power lines for the distribution of energy varies by more than +/- 10%, no longer guaranteeing the maximum limit as required by EN50160. […]

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EU: the new 2009/125/CE directive on ECODESIGN transformers

  • 17 July 2014

  The aim is to reduce losses and gain in efficiency. GBE are ready, thanks to their high ECODESIGN transformers production.   The global commitment for energy efficiency and emissions reduction keeps moving on. The newest European Union Legislation 548/2014 sets the new standards about ecodesign, imposing a drastic reduction on losses of new transformers launched on […]

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