It is important to size motor starters and their overload relays based on the expected value of current that is to be drawn by the motor at the voltage it is used at.Įach of the six individual coils has two leads supplying it, for a total of twelve leads in total. Most motors will list two values of voltage and current on their nameplates. Note that the low-voltage connection will necessarily need to draw twice as much current from the source as the high-voltage connection. In the low-voltage configuration, the two coils of each phase are connected in parallel with each other so that the lower value of supply voltage is shared equally between the coils and rated current is drawn through each winding.
#12 LEAD MOTOR WINDING DIAGRAM SERIES#
In the high-voltage configuration, the two coils of each phase are connected in series with each other so that the higher value of supply voltage is split equally between them and rated current is drawn through each winding. Three-phase motors are also constructed to operate at two different voltages, and so the coils can be connected in either their high-voltage or low-voltage configurations. There are two classes of 3-phase motors: Wye and Delta. The internal construction and connection of these coils inside of the motor is predetermined when the motor is manufactured. Standard 3-phase motors use six individual coils, two for each phase. Three-phase motors use coils of wire to create magnetic fields and produce rotation.
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