Siemens DTU3005-B Especificaciones descargar pdf (Pagina 10)

AC Voltage, Current, Current flow in AC voltage reverses direction at regular

and Frequency intervals. AC voltage and current are represented by a sine

wave. Sine waves are symmetrical, 360° waveforms which

represent the voltage, current, and frequency produced by an

AC generator.

If the rotation of an AC generator were tracked through a

complete revolution of 360°, it could be seen that during the

first 90° of rotation voltage increases until it reaches a

maximum positive value. As the generator rotated from 90° to

180°, voltage would decrease to zero. Voltage increases in the

opposite direction between 180° and 270°, reaching a

maximum negative value at 270°. Voltage decreases to zero

between 270° and 360°. This is one complete cycle or one

complete alternation.

Frequency is a measurement of the number of alternations or

cylces that occur in a measured amount of time. If the armature

of an AC generator were rotated 3600 times per minute (RPM)

we would get 60 cycles of voltage per second, or 60 hertz.

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Siemens DTU3005-B Especificaciones Pagina 10