Answer / bharat

In almost all the motors, in starting condition, Armature
current will be very high.

To control that current, starters will be used.

Answer / harish kumar- greenesol

to control the speed of motor through voltage , and to
start smoothly.also some of the cases we can control the
starting current.

Answer / vincent omwikha

.To control the starting current of the motor thus avoiding
overheating of the windings.
.To avoid undervoltage hence tripping of other equipments
on the same line i.e for big motors
.Able to vary the speed of the motor
.Provides different starting/stopping points of the same
motor.
.Provides control measures of overcurrent,earthfault i.e
overload relays,circuit breakers,fuses
.Provides power isolation mechanism when one works on the
motor i.e fuses, breakers, isolators
.Able to know the current taken by the motor i.e ammeters

Answer / mahesh

Normally starter are provided to control & protect the motor during starting & running condition . its help to control the starting current by controlling the voltage & frequency during starting in order to keep the motor winding temperature within the permissible limit.

Answer / parthi

The starter is used to
limit the starting
current of the motor.
The starting time motor
takes high current(5 to
6 times of its rated
current). This high
current damage the
motor windings. So the
starter is essential for
motor.

Answer / mrt

to control the armature(dc motor) or stator(slip ring)
current

what type of transformer used in soft ware parks its distribution or power transformer. like 1800 kva

3 Answers  

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0 Answers  

Mention the disadvantages of low power factor? How can it be improved?

0 Answers  

hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

0 Answers  

54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?

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EXPLAIN WORKING PRINCIPLE OF ALTERNATOR & MOTORS.

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0 Answers  

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0 Answers  

what you mean by current? what you mean by voltage? what is difference between star and delta connection in motor side?

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1 Answers