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Ultra-Fast Earthing Switch UFES

Active internal arc protection

The UFES provides innovative arc-fault protection, offering the highest possible level of safety for personnel and equipment, the maintenance of secure power supply and the reduction of production outages


Key benefits

  • Greatly increased operator safety due to active internal arc mitigation
  • Minimized damage of electrical equipment and environment
  • Drastic reduction in downtimes & repair costs, preventing switchgear destruction or heavy damages in case of internal arc occurring
  • Reduced pressure level allowing active protection concepts - eg. where gas ducts are not applicable
  • Possible reduction of personal protective equipment (PPE) level according to NFPA 70E
  • Minimized release of toxic gases due to effective reduction of arc duration

Key features

  • Arc-fault extinction in less than 4 ms
  • Arc detection by means of optical sensors and current measurement
  • Available for switchgear ratings up to 40.5 kV and 100 kA
  • Easy integration into new and existing low- and medium-voltage systems
  • Combinable with different arc protecting devices, including REA, TVOC-2 or non-ABB devices
  • Available as individual components and fully type-tested switchgear solutions

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