Interested to Buy Any Domain ? << Click Here >> for more details...
Why is starter necessary for a three-phase induction motor?
- 37 Answers
- 180328 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
What is state space method ? Why its used ? Can it applicable on linear, non-linear, 1st order, higher order, homogeneous, non-homogeneous, open-loop , closed loops , stable & unstable systems ?
which is the most advanced form of SF6 BREAKER?Can we use other gases to quench the arc?
Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?
what is formula to cal cute earth pit numbers and size of earth strip used in earthing?
in control panel, how can i measuring the distance between one bus bar to another bus bar. then now only for bus bar. in mpcb and contactor also. that means one mpcb to another mpcb how much distance? how can i calculate that.
Why derating factor os applied on Cables?
Define resonant peak?
WHY BLADE & JOW OF ISOLETOR IN SUBSTATION?
Why generation voltage in thermal power plant is between 11kv to 33kv?
What is the most important precaution in any experiment with d.c. Shunt motor?
what are the sample questions asking to the test cunducting for electrical superwising lisence test?
Name of the relay of low lub oil presuure in DG sets
DG SET BLOCK DIGRAM
Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.
how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?
