Vacuum cast coil (VCC) transformers

Hitachi Energy’s Vacuum Cast Coil (VCC) transformers use the most technologically advanced design to support the extreme conditions present in chemical processing, extra heavy traction, and heavy industrial applications. Hitachi Energy has design and manufacturing flexibility to produce oval or round-shaped core and coil assemblies for optimum space utilization.

These distribution transformers are almost maintenance-free, and they are manufactured in accordance with industry and international standards.

The VCC dry-type distribution transformers are moisture-proof and suitable for operation in humid or heavily polluted environments. They are the ideal transformers for operation in environments with humidity higher than 95 % as well as at temperatures down to -40 °C. Less space and civil work are needed, and no special safety features are required (fire detection). They are maintenance-free and extend transformer life due to low thermal and dielectric aging. It can be installed closer to the point of consumption, reducing load cable losses. Safe and environmentally friendly, reduced environmental contamination, and zero risk of leakage of flammable or contaminating substances. High resistance to short circuits and high capacity to support overload. They are capable of withstanding the most severe rolling and vibrating conditions.

Product scope

• Up to 63 MVA
• High-voltage up to 72.5 kV
• Low voltage up to 24 kV
• Classes (E3, C3, F1)
• Partial discharges <10 pC
• Protection degree: IP00 - IP54
• Insulation system temperature: 155 ºC (Class F) and 180 ºC (Class H)

Why Hitachi Energy

• More than 30 years of serving the market (experience) and with references all around the globe
• Respectful to people and property
• Meeting all transformers' standards
• Great product quality based on the method and the technology production, including windings one
• Suited to operate under heavy vibrations
• Great performance in environments with a relative humidity of 100 % and in air containing salt and dust

EU EcoDesign product information

The EcoDesign Directive of the European Union and the related Regulation 548/2014 for transformer losses require manufacturers to publish on the internet information on rated power, load loss, no-load loss, and weight and type of the major components of typical transformers, which are compliant with the Regulation. Such typical values are specified under EU EcoDesign product information for Tier 1 requirements.

Load loss and no-load loss values are maximum values with 0% upwards tolerance. If a value exceeds at factory routine testing the maximum value, the transformer is not compliant with the Regulation and it is not allowed to use in the EU. 

Note that the values indicated for the weights depend on each specific transformer specification and may vary. The values also depend on the exact grade of electrical steel to be used. Transformer designs and materials used are constantly changing with changing materials prices. 

Hitachi Energy can also provide transformers according to Tier 2 loss requirements and even lower losses. Hitachi Energy is the leading manufacturer of ultra-efficient transformers, as a company being itself fully dedicated to energy efficiency, and able to consult you for energy efficiency and sustainability.