Schematic Diagram Of Auto Transformer Starter. Auto transformer starter control circuit diagram picture posted and uploaded by admin that kept inside our collection. This arrangement start an induction motor with reduced voltage and the value of voltage depends upon the ratio of tap selected.
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Schematic of an auto transformer starter is shown below. Autotransformer starter control circuit diagram the working of the starter is as under. V 1 is the supply voltage per phase.
The figure a shown below shows the condition when the motor is directly switched on to lines and the figure b shows when the motor is started with the help of auto transformer.
Theory of auto transformer starter. When the start button is pressed a circuit is completed to the coil of main contactor m timer tr and shorting contactor s. The figure a shown below shows the condition when the motor is directly switched on to lines and the figure b shows when the motor is started with the help of auto transformer. One disadvantage of delta connected three phase transformers is that each transformer must be wound for the full line voltage in our example above 100v and for.
