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Motor Starting Methods

Motor Starting Methods. Across-the-Line Starting. Motor Starting Methods. Reduced-Voltage-Starting. Used when starting current is too high for the system to tolerate. Need special method such as timers or speed switches to make the transition from reduced voltage to full voltage.

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Motor Starting Methods

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  1. Motor Starting Methods • Across-the-Line Starting

  2. Motor Starting Methods • Reduced-Voltage-Starting. • Used when starting current is too high for the system to tolerate. • Need special method such as timers or speed switches to make the transition from reduced voltage to full voltage. • Transition usually timed so that it occurs when rotor is at 90% of rated speed.

  3. Motor Starting Methods • Resistor Starting.

  4. Motor Starting Methods • Reactor Starting.

  5. Motor Starting Methods • Autotransformer Starting

  6. Motor Starting Methods • Wye-Delta Starting

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