The most common methods of Reduced Voltage Beginning for three-phase motors include Primary-resistance starting, where a resistance unit is connected in series with the stator to reduce the starting current.
In short, it is any device, used with an electrical motor that, instead of flipping a switch and obtaining it to full power, it gradually applies a voltage, allowing the motor to control the electrical load and torque of that startup.
Autotransformer starting
Autotransformer starting uses a brushed 3-phase autotransformer to provide a reduced-voltage starting. Autotransformer starting is one of the most efficient techniques of reduced-voltage starting
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