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Hitachi Energy's VUBB type of on-load tap changer is designed to be mounted inside the transformer tank and is intended for transformers up to 100 MVA. It is extensively tested even beyond what international standards stipulate, which—together with experience from tried and tested solutions—ensures the dependability of the product. A simplistic, reliable design philosophy ensures less complexity for reduced maintenance time and cost.

 

Product scope

  • Base technology: Vacuum, resistance, in-tank, selector switch
  • Common applications: Network, special, industrial
  Tap-changer placed in the neutral point of the winding Other placements of the tap-changer
Highest voltage for equipment (Um) 76 kV 76 kV
Max lightning impulse (BIL) 380 kV 380 kV
Max current
3-phase
1-phase (one tap-changer/phase)

600 A
600 A

600 A
600 A
Max step voltage 1600 V 1600 V

 

Why Hitachi Energy?

  • Savings in transformer space. Completely self-contained cylindrical design ensures reduced transformer size and ease of installation.
  • Integrated pre-selector eliminates gassing in the transformer tank and the resulting error in gas analysis.
  • Our patented system for field inspection without disassembly exemplifies the simplistic, reliable design philosophy for ease of use.
  • Reduction in maintenance costs. No changing of wear parts during the transformer’s lifetime with normal operation.

Get to know more

Document title ID
Technical guide
Ordering data form (.xlsm)
Please note that this is an interactive form, which can be filled in, saved, and sent to us by e-mail.
Installation and commissioning guide
User's guide 1ZSC000562-AAL
Accessories and protection devices 1ZSC000562-AAD
Oil filter unit, type OLU

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