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why the weight of oil in transformer is specified (on the nameplate) in litres as well as kilo grams?
3 5791Trafo ratio is 11kV/6.6kv,Vector group is YND11. What will be the effect if secondary is used for earthed system.
3800Three way plug point is there ,in that plug why we need earth pin is bigger than compare with phase and nutral pins?
IIT,
7 10609why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?
1964Explain about Dubai electrical sysaem? Explain about Dubai drinking water system? Explain about Dubai Burj tallest building Electrical,Water.etc.. maintenance system?
2175what are the industrail measures to over ferranti effect? how would the ferranti effect the power system if those remedial mearsure arent taken? how often does this effect occurs in real power system?
2148we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.
MTN,
1918Post New Electrical Engineering Questions
Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??
What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.
how oltc works in rectiformers of higher rating (27 mva,200v dc,120kamps) please provide me full information with diaggram.
could you measure current in parallel?
what types of cable used in underground coal mining?
can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.
1sq mm dc powr cable can carry how much dc currnt
A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?
A low wet bulb temperature indicates
what is meant by motor startup supervision & motor load jam protection ?
What is DTR erection?
What is the disadventage of gland earthing(power cable) if any. ?
what is the difference b/w ground & virtual ground?
Comment on the working principle of operation of a single-phase transformer.
When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?
