The UFES must be installed in indoor environments that meet standard IEC 62271-1 conditions: (special options available for Humidity: Maximum relative humidity of 95% over 24 hours.
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The system consists of two primary parts that work together to mitigate arc flash energy: abb+ufes+manual
The ABB is an active arc-fault protection system designed to extinguish internal arcs in less than 4 milliseconds . The UFES must be installed in indoor environments