Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

unsymmetrical load
a load which forces the currents in the three-phase power line which supplies it to be unequal.
up-down converter

See buck-boost transformer
up-down counter
a register that is capable of operating like a counter and can be either incremented or decremented by applying the proper electronic signals.
up-down transformer

See buck-boost transformer

See uninterrupted power supply
utilization factor
the ratio of the maximum demand on the system vs the rated capacity of the system.
utilization voltage
the voltage across the power input terminals of a piece of electrical equipment.