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Do I need a special Transformer to put 240 VAC 3 phase into it and and get 480 VAC 3 phase out of it to run a machine? Or, do I just use an ordinary step down transformer and step up the voltage? Thanks
2 5273We know that, in case if there is a faulty insulation,or sc, the current is bypassed to earth through the earth wire that has low resistance.Actually, what will happen to that current that flows through gnd?In that case,if we come in contact with that faulty appliance, wont that current flow through us as we form a closed path by standing in gnd?Is grounding a safety measure?
3 6344Hai, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to yuva_polisetti@yahoo.co.in
1778why we step down voltage level from 33kv to 11kv and 11kv to 415v.Instead we can step down voltage from 33kv to 415v directly using single transformer.
12 73987sir, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to eee_dharmendra@yahoo.com
1801how can you prove that in CE configuration a transistor has 180 degree phase shifted output
Bhel,
5 15234hi frenz,its aswathy.i hve aplied for the hpcl test on feb,pls send the test patern & the placement papers as soon as possible. mail-id :kjaswathy@gmail.com
1745HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com
2206How can we measure and monitor critical performance parameters of Diesel Generator Sets, both electrical and engine ?
3 10374hi frnds.....anyone get any reply from HPCL. I HAVN'T.....B,COS written will b on FEB 17 th.
HPCL,
1 4599WHAT IS THE DIFFERENCE BETWEEN RESISANTANCE AND IMPEDANCE IF IMPEDANCE IS MORE THAN RESISTANCE AT SAME VOLTAGE CAN WE HAVE RELATION DERIEVED BETWEEN THEM
4 10445Post New Electrical Engineering Questions
If UG power cable both ends are to be earthed or what? If not why?
What does the letter CTNM in negative phase sequence relay means?
what type of earthing do for dry fissure rock?
How to perform a DC resistance test In Alternator and their proceduces?
why dimmerstate always connected in star connection? what will happen if it connected in delta?
what is formula to cal cute earth pit numbers and size of earth strip used in earthing?
PLEASE SEND THE PREVIOUS YEARS QUESTION PAPERS OF RRB JUNIOR ENGINEER-ELECTRICAL
Direction of flow of active power and reactive power with logic?
Refernce currents are to be generated using refernce cueernts how can this be done
What are chief characteristics of state-space method and its techniques ?
sir, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to eee_dharmendra@yahoo.com
Explain what is electric traction? Explain few advantages of electric traction system?
what are the major & minor faults that occur in an inverter and in UPS ? And how to repair and resolve them ?
what is difference between line differential and transformer differential?
ho can we calculate the conductor insulation value according to their ratings like voltage,current etc.how insulation value related with voltage,current and power of amachine
