Abb+ufes+manual Link -

The UFES is a combination of high-speed electronics and primary switching elements (PSE) designed to initiate a controlled three-phase short-circuit to earth. The system typically consists of:

Three units that create the metallic short-circuit in less than 1.5 ms. abb+ufes+manual

The electronic unit sends a trip signal to the PSE in less than 1 ms. The UFES is a combination of high-speed electronics

The manual provides critical instructions for installing, configuring, and maintaining one of the industry's fastest active arc-fault protection systems . By extinguishing internal arcs in less than 4 milliseconds , the UFES system significantly reduces the thermal and mechanical stresses that can destroy switchgear and endanger personnel. System Overview and Core Components Technical Specifications UFES | ABB - Core components

The feeder circuit-breaker finally shuts down the resulting controlled earth fault current. Technical Specifications UFES | ABB - Core components