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Because the UFES operates using an irreversible chemical process in its micro gas generator, specific maintenance steps are required: Ultra-Fast Earthing Switch - Type UFES - ABB

If you are searching for a manual because you have ABB equipment labeled "UFES" on a project tag, you likely need the generic manual for that specific device model (e.g., ABB DCS800, ACS880, or Conceptpower DPA). abb+ufes+manual