5 . 4 . 2 Current Limit Acceleration Starters

5 . 4 . 2 Current Limit Acceleration Starters

5 . 4 . 2 Current Limit Acceleration Starters

5 4 2 current limit acceleration starters

5 4 2 current limit acceleration starters

5 . 4 . 2 Current Limit Acceleration Starters In this type of starters the load (i.e ., the current) will determine how rapidly a motor is to be brought to full speed. A lightly loaded motor may be brought to final speed more quickly than heavily loaded motor . This is made possible by utilizing the fact that rate of current change varies with the load. Inrush current drops faster with a lightly loaded motor and slower with a heavily loaded motor . In these starters , a set of series or current relays pick up and drop out on changing values of armature current which occurs as the motor accelerates and these relays in turn energise contactors to successively cut out (or short-circuit) resistors from the armature circuit . Current limit starters functioning on the basis of current change are of three types , viz (i) the series relay type (ii) the counter emf type and (iii) the lockout type .

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