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Hitachi

Transmission and Distribution Systems

High Voltage Transformer

  • Transformers are components with a history and tradition dating back over 100 years since Hitachi was founded.
  • These transformers are installed at relay points in the transmission of electricity produced at power stations to consumers (such as households and factories).
  • In addition to extra-high voltage (EHV) and high voltage (HV), they offer practical use of ultra-high voltage (UHV) transmission of up to 1000 kV.


High Voltage Transformer

Site-Assembly Transformer

  • Electricity sent at high voltage is stepped down in stages at the relay point substation (transformer) and distributed at a voltage that is easier to handle.
  • These transformers respond to the increasing needs for long-distance electricity transmission at high currents from power sources in remote areas with the spread of power demand.
  • Along with their high level of reliability, they make use of the latest technologies such as on-site assembly and gas insulation according to transmission grid issues and applications.


500kV Site-Assembly Transformer

Phase Compensating Transformer

  • These transformers play a vital role in leveraging the properties of electricity, in that less power is lost during transmission as the voltage is increased.
  • Phase compensating transformers improve the constantly changing power flow, reducing power loss and boosting system stability.
  • They offer functions to improve system stability and reliability and reduce power loss to improve power flow over the entire system.


230kV Phase Compensating Transformer