adspace
What happens if ac is applied to dc systems and vice versa?
Answer Posted / deepak mishra
if dc supply is given to ac system than equipment like
transformer and motor(which works on induction principle)
burns. it is due to so much heat generated in windings as
flux does not vary in dc supply. while giving ac to dc
system there will be a increse in losses and material.
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.
Draw a SLD of DG distribution up to main LT panel?
please send me latest & previous years question papers for IOCL Technical level questions
Dear All we are having a problem in G120 BOP showing alarm A0503, F0052, F0060 we can not remove fault alarm ,Please any body help us. kowsar
how many stairs have you climbed while you were coming
Dear all i want to know SEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me zohairaukllah@yahoo.com
can you plz send l&t aptitude questions if available its urgent plz plz plz
i karmveer bharti persuing b.tech . plz send me syllabus and name of reference books. for preparation of section eng.
How to calculate VCB rating for 33KV ,25 MW Power line?
WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.
plz tel me syllabus and exam date 4 jr executive engg (electrical)
sir& friends i want the collection of recent quetions asked in interview of top most companies please send me on my email san.jsr@hotmail.com
I NEED RRB APTITUDE QUESTIONS AND MODEL PAPER,PLEASE SEND MY E-MAIL joo28_eee@yahoo.co.in
What current position are you holding in your current company?
Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason