Why is starter necessary for a three-phase induction motor?
- 37 Answers
- 168320 Views
- BMM, Essar, Hero MotoCorp, ITI, Maruti Suzuki, Supertech, Watt, I also Faced
- E-Mail Answers
Answer Posted / abanikanta
Starter is used to reduce starting current.starting current
is usually large because of inertia,charecteristics of
motor winding(at starting slip=1,rotor resistance low
implies less back emf).So at starting we use starter .for
example.STAR DELTA starter.by using a starter at least the
switching is improved which is much important for safe and
longer life time use.simply a DOL can be used for lower
rated motors (up to 07 HP)in this case.for higher rated
motors (up to 15 HP)we can use a star delta connection.a
delta connected motor takes 1.7 times line current than a
star connectd motor.think ! at starting the current is
almost halved .Now a days we use drives (power electronics
products which not only takes care of starting of a motor
(improving power factor) also controls it as perrequirement.
| Is This Answer Correct ? | 56 Yes | 8 No |
Post New Answer View All Answers
sir i applied for hpcl(electrical).i want to know from which subjects most of the technical que will b asked.and pattern of the written test.pls help me
When we use 3 terminal resistor?
How can we find the breaking capacity of a Load breaker switch (LBS) fed from 11 kv supply??ex:50KA, 26kA etc???detailed step vice answer pls.
Write a note on Treatment for electric shock.
how can decide the current rating of oltc
we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?
I want d.g.set our company
Motor,transformers,capacitor tubelight etc....
How Calculet The UPS AH In Load
If we have to find the inductance of a dc shunt motor then by giving dc supply or ac supply and what is the reason for it. (this example is from "to determine the transfer function of a dc shunt motor ")
why Current is lead 90 degree and voltage is lag 90 degree in a capacitor.? why Current is lag 90 degree and voltage is lead 90 degree in an inductor.?
When color of silica gel will gets change from blue to pink from Top to bottom?
what is Different between Bilinear and Unilenier?
what is the solution for meger test failed the MV cable?
difference between a diode and thyristor?
