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On-load tap-changers type UCL

The UC family is a group of diverter switch on-load tap-changers. They come in a wide range of models with a rating suitable for every application. They are mounted inside of the transformer tank, suspended from the transformer cover. The UC types operate with conventional arc quenching in oil diverter switches. 

The UCL model is the mid-size of the UC types and is suitable for transformers up to 850 MVA with a BIL rating of 1175 kV and current rating of 925 (2400) A.

Extend your transformer’s lifetime and easily upgrade on-load tap-changers type UCL with vacuum technology.

Product scope

  • Base technology: Conventional, resistance, in-tank, diverter switch
  • Common applications: Network, special, industrial, HVDC
 
  Tap-changer placed in the neutral point of the winding Other placements of the tap-changer
Highest voltage for equipment (Um) 362 kV 362 kV
Max lightning impulse (BIL) 1175 kV 1175 kV
Max current 3-phase 1-phase (one tap-changer/phase) 925 A
2400 A
N.A.
2400 A
Enforced current splitting 1-phase (one tap-changer/phase) 2700 A 2700 A
Max step voltage 4500 V 4500 V

 

Why Hitachi Energy?

  • Unique open design for quick and easy maintenance
  • Maintenance in any tap position and without dismantling the shaft system, thus eliminating the risk for failure from improper assembly or alignment
  • No online oil filter is needed
  • Unsurpassed maintenance intervals

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