Three units that create the metallic short-circuit in less than 1.5 ms.
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: abb+ufes+manual
Uses external detection devices like the ABB Arc Guard System™ TVOC-2 or REA arc protection for large-scale monitoring. Operational Workflow Three units that create the metallic short-circuit in
Optical sensors (for light) and current transformers (for overcurrent) identify the arc fault. Operational Workflow Optical sensors (for light) and current
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
A micro-gas generator in the PSE creates a low-impedance path to ground, causing the arc voltage to break down.