Answer Posted / ahmed raza
Formulla for calculation of breaker is...
Total load in Watts/380(voltage)*0.8(pf)*1.732(delta to Y
conversion)
So
= 644/380*0.8*1.732
= 1223.10
we can say
= 1250AMPs breaker should be use....
Is This Answer Correct ? | 0 Yes | 3 No |
Post New Answer View All Answers
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
plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com
Would you recommend to replace all oil filled cables with xlpe cable for hv transmission with the current technolgy for xlpe cable?
what is Anti-pumping?
i have a 4 Mva transformer 34.5 kv / 480-277 v and i used 2 parallel 3200 amp bus duct for the secondary feeder using 3 ply of bus bar ( 3/8" x 5" ) as a common where the flexible link terminated and 6300 amps breaker for the main, the lower bus duct reaches 70 degrees and the upper bus duct reaches 55 degrees when i used thermal scanner. why the temperature is not balance when the load reaches 3600 amps.
What are the functions of different probes used in cro?
can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)
What is the rate of WCT on the Electrical Contracts comprising of DG Sets and Civil Works in Delhi ?
What types domain of laplace transforms? What behavior can laplace transform predict how the system work?
what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks
According to IEC60034-14, When the vibration monitoring system required for motor Bearing. above which KW, it is required? and for what type of bearing the vibration probe is provided.
how does a submersible pump work..?
What are diffrent type of road taxes?
what is the principle of the single phase energy meter? and,what is the advantages and disadvantages of single phase energy meter?
whit is 33kv power 300*300 cable full current with formula