Specifications

Variable Speed Drive An electronic drive device used to control the speed of an

electric motor. This term applies to both AC Drives and DC

Drives.

Vector Control A technique employed by some variable frequency drives that

involves calculations of AC motor current vectors and precise

control of motor ﬂux to provide excellent speed and torque

control.

Volt The basic unit of voltage. The symbol for volt is “V.”

Voltage Also called difference of potential, electromotive force, or EMF.

Voltage is a force that, when applied to a conductor, causes

current to ﬂow. Voltage is symbolized by “E” or “V” and is

measured in volts.

Voltmeter A meter designed to measure voltage.

Volts per Hertz (V/Hz) Describes the operation of many variable frequency drives that

Operation control the speed of an AC motor by varying the frequency of

the voltage applied to the motor while maintaining a constant

voltage to frequency ratio.

Watt The basic unit of electric power. The symbol for watt is “W.”

Word Usually one or more bytes used to represent instructions or data

in digital equipment.

Wye A connection arrangement used for the primary and/or

secondary of a three-phase transformer.

Wye-Wye (Y-Y)Transformer Configuration

Primary Secondary