UFC 3 -520-01
June 10, 2002
Transfer Switch--A device for transferring one or more load conductor connections
from one power source to another.
Uninterruptible Power Supply System--A system that converts unregulated input
power to voltage and frequency controlled filtered ac power that continues without
Utilization Voltage -- The voltage at the line terminals of utilization equipment.
Withstand Current--The specified RMS symmetrical current that a circuit breaker can
carry in the closed position for a specified time.
in a circuit.