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Transformer outages have a considerable economic impact on the operation of a power supply network. Internal gas accumulation and oil flow are monitored and kept under control by the Buchholz relay.  

Buchholz relays of Hitachi Energy are designed to promptly provide information about internal malfunctioning, giving the possibility to shutdown the transformer and prevent its possible destruction. The relays are designed to detect faults and prevent damage to the oil circuit, induction coils, and other components in oil-filled transformers.

Why Hitachi Energy?

  • More than 50 years of experience in manufacturing transformer components
  • Global after-sales and customer support network

Product scope:

  • Liquid-filled distribution and power transformers
  • On-load tap-changers
  • Traction applications
Conventional Buchholz relays

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