A complete detection and tripping unit with 3 current and 9 optical inputs.
The "brain" that receives trip signals and triggers the PSEs. It is available in two main designs: abb+ufes+manual
The integration of UFES into a switchgear system fundamentally changes the response to an arc fault from mitigation to elimination. This not only ensures the safety of personnel but also protects the longevity and reliability of the electrical power system itself. A complete detection and tripping unit with 3
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. This not only ensures the safety of personnel
Before putting the system into service, the mandates a rigorous commissioning process.
Ensuring the firing circuit has proper continuity. Operation and Maintenance
Using specialized ABB testing software and injection kits, simulate an overcurrent and light signal simultaneously to verify that the QRU processes the logic correctly. Note: Disconnect the UHEV ignition leads before this test to avoid accidental deployment. 6. Post-Trip Procedure: Resetting the System