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How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?
HAL,
1841What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.
3 9521We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?
5 11807How can I model an open-delta ground transformer for a network supplied by 4 unit GTG and power transformer in ETAP?
13766When should I use earth leakage circuit breaker for incomer and when should I use it for each feeder seperately?
1 3720How can I communicate with an Areva MiCOM P121 relay by RS485 port? In other word, which command can I send and what information can I have recieved? please send some refrences, please. thanks
3 10483the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.
6 71721.what is the funtion of chiller primary & scondary pumps. 2.what is the use of distribution lines & Types. 3.what is the use the thermal power stations & how much capacity.
1984Post New Electrical Engineering Questions
Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?
is it possible to say motor horsepower number without seeing name plate(when name plate damaged)
Work done in a free expansion process is
What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?
What is deference between MCB & MCCB & ISOLATOR
what is the difference betweem star connected motor & delta connected motor?
I AM FROM ELECTRICAL ENGINEERING ? I AM ASPIRING FOR "BHEL".HOW I HAVE TO PREPARE .ON WHICH TOPICS TO BE CONCENTRATE MORE.PLEASE GIVE FULL DETAILS OF WRITTEN EXAM.
Starting current of a 10 HP induction Motor is ______ time’s full load current.
what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.
why effective resistance should be more than static resistance in transmission line?
HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????
What is the difference between DOL starter and star delta starter
(1)Can earth and be conected together (2) what is the diferent between earth & neutral
one conductor length is L.and i am strech uniformly this conductor and made length is 2L.so resistance of this strech conductor is R=4R..but i want to know about area of stech conductor hows it become a/2..
how the works electronic energy meter?
