Interested to Buy Any Domain ? << Click Here >> for more details...
why motor starting current is High ?
- 11 Answers
- 25047 Views
- Bhel, Jindal, I also Faced
- E-Mail Answers
Answer Posted / rvg
Dear Mr. Gajanan, as you are dealing with more machineries,
i want to stress some points:
During starting of motor:
the armature(rotor) is stationary, and it does not having
any magnetic property to resist the applied rotational
frequency at that time.
so it will act as a conductor fixed at rotating magnetic
field and produce some eddy current loss, and with in short
period of time, it will develope some anti rotional effect
to resist the rotational field, ie: rotating with same
direction to reduce the eddy curent.Thats why after
starting current reduces.
inertia of the rotor also having some major role on the
starting current. The gap between rotor and stator having
role on the starting current and initial power factor.
| Is This Answer Correct ? | 22 Yes | 11 No |
Post New Answer View All Answers
how to produsing geretor power
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
1. Design a counter which counts 0, 4, 8, 2, 6, and repeats using: 1.a using JK flip flops 1.b using T flip flops 1.c using D flip flops
ACCORDING TO IEC WHAT SHOULD BE THE MINIMUM HEIGHT OF G.I. STRUCTURE OF CT, PT, ISOLATOR, LA?
i want to apper for apgenco or aptransco or related can any one sugest me where can i get previous papers of thouse exams
what is interpose? where it is used and why it is used?
what are the necessary basic electrical topics to learn for mechanical engineer to deal practical problems.
What is difference between SMC supportg and Glass Fibre Reinforced Plastic Support.
What is the types of HT motor testing
A Question Like A Wire Is Wound Whose Resistance Is Some 132. 44647 Ohms. If A Voltage Of 30 mv, 296 Ma Current Is Applied To It What Is The Resistance.
We have 250 KW x 2 motors, which are load from 25% to 100% varying load in every minute , so how can we compansate the power factor. pl give your opinions on the above subject.
why +24 v and -48 v give to BTS? If -48v protect from surge then why we not use -24 v?
What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???
area control error
DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES
