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when we gave dc supply to 220v dc motor its rpm is 1200. then we gave 180v. how many rpm of its motor. gave answer with calculation at my ID.... ravizak@ymail.com
2349Why is it preferred to use a wattmeter(s) to measure power in three phase systems rather than using a combination of other instruments e.g. voltmeters, ammeters etc?
2 6362in power station what is the electrical circuit length of spacing between power transformer and lightning arrestors,for the voltage system of 230kv,110kv,33kv,22kv,11kv?
1 3952can you use 400 volt 3 phase and neutral and earth equipment on 440 3 phase and earth supply safely and if so how?
2 8137iam working as a electrical engineer. i want to know about any license or certificates regarding my field. for my carrier and ti improve the knoweledge.,,, how we get that..and what procedures......... pls help me
1 4176how to testing the AC 3 phase motor? and what is the test procedure & kits required for testing?
3 8240what is the working principle of contactor and conditions of normal open and normal close on it?
EEE,
3 29816if any house we instaled a 1.5 ton ac and its phase cable of wiring is installed but netrual cable of wiring not instaed. my question is that is neutual of house(for other wiring is capable for ac load or a sepeart neutrual wiring required
24761 no. 22 kV feeder is taken from state electricity board. 350 MVA is the S.C. MVA. now i am feeding this feeder to HT Panel having 2 outgoings which further supply to 2 Transformers. Can you please suggest me the type & rating of cables are 3 of these cables same? or they are different? please help...............
TCE,
2 6606Post New Electrical Engineering Questions
hi pal, i am vengatesh from tamilnadu(chidambaram),i have called for the written test for the post of jr executive(ELECTRICAL) of AAI ,I dont know about the question paper pattern,so any kindly help me to face the examination,post me the model question papers and some tips to write my examination to (vengi.annadurai@gmail.com)
How can we calculate the KVA rating of a Distribution transformer from its core details?
What happen to generator if i have unbalanced load?
Can you please explain creepage distance in detail, for a 6.6kV cable head what must the distance be and how do you determine it?
what should be the ideal gauge of wire (In sq mm) for different loads in Ampere?
How can maintain our H.T. motors used in cement plant. please send me procedure.
Define de-sensitivity?
state the disadvantages of carbon filament???
What is the best thing to protect the motor from running over full current. CT or O/L or pressure transducer at the given pressure rating
our industries ht line so power fluctation(once drop of power please rectify causes
What is dynamo?How it works and what is the function of dynamo in a DG.
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.
hi friends this is a newcomer in your community of enthusiastic peoples. i am preparing for SSC (CPWD JUNIOE ENGG EXAM FOR ELECTRICAL) pls guide me on the same how to crack it? PLS LET ME KNOW IS ANYONE THERE WHO PASED IT? CAN I GET THE QUESTION PAPERS OF PREVIOUS EXAMINATIONS?
What is the formula for calculating no-load current?
why the electrolyte level in lead acid battery is maintained 2.5 cms above electrodes?
