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Normally the
starter used to
reduce the
starting
current.but the
dol starter do not
it,so why we use
it?
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Answer Posted / m s venkateswara rao
Normally Starters are used to reduce the starting current. But selection of the starter is based on the type of application whether starting torque is required high, medium, normal.Normally any motor during starting will take 4 to 5 times of full load current.Up to 10 Hp usually will use DOL because of motor full load current is 13 Amps and during starting will take 65 Amps as a result supply system dos not get affect. Above 10 HP usually motor full load currents are high and during starting will draw high starting current which will affect out supply system ie voltage drop, for which all associated equipment connected with the system will be affected.Usually above 10 HP motors with a application of medium torque will use star/ delta starter to reduce starting current. If the application is required high starting torque will use dol starter irrespective of the rating of the motor.
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