RESIBLOC® transformers

RESIBLOC® cast-resin transformers are dry-type distribution transformers that offer maximum mechanical strength to withstand thermal and mechanical stresses from severe climates, cycling loads, and short circuit forces. RESIBLOC® transformer windings are hermetically cast in epoxy without the use of a mold for maximum design flexibility. RESIBLOC® transformers are non-explosive with high resistance to flame and do not require vaults, containment dikes, or costly fire suppression systems.

RESIBLOC® transformers are produced in full compliance with DIN EN ISO 9001, DIN EN ISO 14001, and BS OHSAS 18001 standards.

The material Resin is a material of immense strength. The modern winding processes and electronically controlled winding machinery ensure an even distribution of glass fiber rovings and epoxy resin and the highest precision in manufacturing transformer windings. Multi-spaced ribs, built-in during the winding process, integrate the HV and LV windings into a single compact winding block. There is no risk of any contamination to the application environment, and it is non-explosive with high flame resistance. Severe load cycles (cold start to maximum load) and high short circuit withstand. Exposure to harsh climates (freezing, heat, chemicals, moisture); minimal maintenance.

Key Features

• Voltage: Up to 36 kV, with high-voltage up to 36 kV and low voltage up to 24 kV
• Classes: E2, E3, E4, C2, C3, C4, and F1
• Frequencies: 50 Hz, 60 Hz, and 16 ⅔ Hz
• Cooling: AN | ANAN | ANAF | AFWF
• Insulation system temperature: F
• Partial discharges: <10 pC
• Protection degree: IP00 - IP54
  

Why Hitachi Energy

Hitachi Energy stands out for its comprehensive scope of supply, offering solutions up to 63 MVA and 72.5 kV while meeting all Distribution Transformers standards. Their design flexibility includes transformers capable of operating in extremely low ambient temperatures down to -60ºC, providing stronger resistance against short-circuit stress and superior performance under load changes. The linear distribution of BIL ensures the highest possible security against cracks on coils, with no silicone used during coil manufacturing. Hitachi Energy's transformers exhibit better performance under dynamic loads and severe ambient conditions (exceeding E2), making them highly suitable for extremely cold environments. Additionally, the vacuum circuit breaker is proven to enhance reliability and safety.

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 a 0% upward tolerance. If a value exceeds the maximum value during factory routine testing, the transformer is not compliant with the Regulation and is not allowed to be used 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, as are materials prices. 

Hitachi Energy can also provide transformers according to Tier 2 loss requirements and lower losses. It is the leading manufacturer of ultra-efficient transformers. As a company, it is fully dedicated to energy efficiency and can consult you on energy efficiency and sustainability.