According to the UFES Technical Guide, the system consists of two primary parts:
The UFES can be integrated into existing switchgear as a retrofit or as part of a new installation. The primary method of installation involves mounting the UFES "service box" directly onto the switchgear panel. This box is then connected to the main busbar via copper bars.
Uses external detection devices like the ABB Arc Guard System™ TVOC-2 or REA arc protection for large-scale monitoring. Operational Workflow abb+ufes+manual
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The ABB UFES is a vital component for ensuring maximum safety in medium-voltage switchgear. By meticulously following the instructions provided in the , operators can ensure the highest levels of safety and reliability for their electrical infrastructure. According to the UFES Technical Guide, the system
Available in different ratings matching standard switchgear voltages (e.g., up to 17.5 kV or 40.5 kV).
: Can be installed in a top box, cable connection compartment, or as a separate draw-out unit. Retrofitting : For older systems, ABB offers a Service Box Uses external detection devices like the ABB Arc
The manual outlines a precise sequence of events that occurs during an arc fault event:
The ABB UFES system is a modular, multi-function power quality solution that combines the benefits of uninterruptible power supplies (UPS), voltage stabilizers, and frequency converters in a single unit. The system is designed to provide:
The system consists of two main functional blocks:
: The QRU relies on internal storage capacitors to deliver the firing pulse. The manual prescribes functional tests to ensure these components hold their required charge. Post-Trip Procedure (One-Time Use)