Page 112 - Electrician - TT (Volume 2)
P. 112

ELECTRICIAN - CITS



           Fig 3 shows the connection of an auto-transformer starter.  To start the motor the handle of the starter is turned
           downward and the motor gets a reduced voltage from the auto-transformer tappings.  When the motor attains
           about 75% of its rated speed the starter handle is moved upward and the motor gets full voltage.  The auto-
           transformer gets disconnected from the motor circuit.
           Hand operated auto-transformer starters are suitable for motors from 20 to 150 hp whereas automatic auto-
           transformer starters are used with large horse-power motors upto 425 hp.















































































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 CITS : Power - Electrician & Wireman - Lesson 70-75  CITS : Power - Electrician & Wireman - Lesson 70-75
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