Why motor initial starting current is high?
Answer Posted / guest
During starting
1.In a DC motor the back emf is zero
2.In a AC motor the frequency is zero(slip is 0),hence
reactance(z) is zero,I=(v/z) hence current is infintiy
| Is This Answer Correct ? | 22 Yes | 52 No |
Post New Answer View All Answers
before synchronizing an alternator,power factor is leading ,why?
What is negative sequence over voltage element?
What is load boxes ?
In dc ckt. 24v or 110v, which one is more efficient and why?
explain the function of brush less dc motor?
what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.
What is cross over distortion? How it can be eliminated?
what is the ATS .And how it works.
Why you want to join non technical field when you are an engineer?
what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?
As an electrical engineer what are the responsibilities which i can hold in TCS?
why HT armoured cable does not glanding
Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.
Why do not we prefer non conventional sources of energy to conventional sources?
CALCULATE THE TOTAL VOLTAGE DROP AND SELECT THE CABLE SIZE IN MM-SQARE FOR A PANEL-262KW AT 110 METER FROM THE SOURCE SUPPLY , SUPPLY VOLTAGE 240/415