This section outlines the physical installation of the device units. It includes guidelines on:
Optical sensors (for light) and current transformers (for overcurrent) identify the arc fault.
The intelligence of the system resides in the electronic unit. It evaluates sensor inputs and triggers the PSE.
The complete ABB UFES system relies on a combination of optical detection, electronic processing, and fast-acting mechanical switching elements. According to the product manual, the system consists of two primary component groups: Electronic Detection and Tripping Units abb+ufes+manual
ABB also offers that cover these maintenance routines. The official UFES training (e.g., the 2‑day course at ABB’s Training Center in Ratingen, Germany) is structured as 40% theory and 60% hands‑on practice on real equipment, with a maximum group size of 5 participants.
Contact ABB for specific training availability in your region.
An all-in-one unit with internal light and current detection. This section outlines the physical installation of the
The Ultimate Guide to the ABB UFES (Ultra-Fast Earthing Switch): Manual, Installation, and Operation
Clean the optical lens sensors using a dry, lint-free cloth. Dust buildup can reduce light sensitivity and delay tripping times.
The ABB UFES is designed to be low-maintenance, but periodic checks are required to guarantee reliability over its operational lifespan. Routine Inspections It evaluates sensor inputs and triggers the PSE
: The PSE closes in less than 1.5 ms , creating a low-impedance earthing path that extinguishes the arc by collapsing its voltage. Key Technical Specifications Rated Voltage : Up to 40.5 kV. Short-time Withstand Current : Up to 100 kA. Total Extinguishing Time : Less than 4 ms after detection.
: Periodically inspect the electronic units for dust accumulation or moisture ingress.