why? X-ray machine load is 16 Amp 230Volts AC. Number of Earthing Pipe required= 50000/838 =59.66 Say, Resistance of Earthing Pipe (Isolated) R=100×72.44/2×3.14x300x(loge (4X300/10))=7.99 Ω/Pipe, Overall resistance of 60 No of Earthing Pipe=7.99/60=, Calculate GI Strip having width of 12mm , length of 2200 Meter buried in ground at depth of 200mm,Soil Resistivity is 72.44 Ω-Meter, From above Calculation Overall resistance of 60 No of Earthing Pipe (Rp) =, Net Earthing Resistance= =(0.133×0.05)/(0.133+0.05)=. He has more than 13 years experience in transmission & distribution-energy theft detection and maintenance electrical projects. 0000001336 00000 n Allowable Current Density  = 7.57×1000/(√100X1)=757 A/m2, Surface area of both side of single 600×600 mm Plate= 2 x lxw=2 x 0.06×0.06 = 0.72 m2, Max. He is FIE ,MIE and CEng from Institution of Engineers,India. How to calculate the internal earthing cable for the panel? How we considered costant K in 4.

Could you please help me out with the earthing design for a solar power plant of capacity 1 kw on grid system. plz reply fast as possible, Can you plz tell me if the DT rating is 250kVA /400kVA, the earthing type is Chemical Pipe earthing (with strip size 40X6) then what is the flat size that can be used from DT neutral to Chemical pipe, DT Body to Chemical pipe & LA to chemical pipe earthing…..Project-RAPDRP, sir pl explain briefly about selection of GI pipe for water supply for G+^ multistory bldgs s, please tell me how much type of standard earthing pit is present now and why they are accepted and any body make patent for it or not.
0000001582 00000 n Number of Earthing Plate required =Fault Current / Max.current dissipated by one Earthing Pipe. My question is how to calculate earthing strip size for DG and transformer…..

2) 2000 kVA, 11000V, Full load amp 105 Amp, Alternator vendor catalogue has mentioned as alternator can withstand up to 3 time of full load current for 10 sec, HELLO, dear sir, earth pit different size using flow chart 100kva , 200kva , 500kva ,,,. Distance from the LMR ( lift machine room ) and the pit 250 mtr ). Really appreciated stuff, direct would like you to please give some detail on your blog or direct to my mail that what will be the consideration for Solar PV Plants. Please let me the best brand ; quality wise available.

Current carry capacity of 35 sqmm bar= 0.8* 35 = 28 Amps. They are mainly used in the high current junction like breaker joint, …

Post was not sent - check your email addresses! I would like to draw your attention to formula for calculating resistance bare earthing conductor or strip, where diameter of conductor is to be used.

In example given in the article, probably single diameter of conductor is used. The Size of Body Earthing should be capable to carry half of neutral Current. However a strip with lesser size which can carry a current of 35A can be used for body earthing.

4. The most critical earth fault path is on the MEN link between the earth bar with the main earthing conductor and the neutral bar of the Main Switchboard. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes.

The size can be decided on the main incomer Breaker. In my past experience i used primary injection method with loading transformer setup and Omicron. Reference: As per EHV Transmission Line Reference Book page: 290 and Electrical Transmission & Distribution Reference Book Westinghouse Electric Corporation, Section-I Page: 570-590. He is Freelancer Programmer of Advance Excel and design useful Excel base Electrical Programs as per IS, NEC, IEC,IEEE codes. How will we can chose neutrul earth flat of 2500 kva transformer The reason for using 2 earth pits for each body and neutral and then shorting them is to serve as back up.
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Article for calculating nos.

Lift machine room is single with 19.5Kw each machine total 8 numbers.. Thank you for the valuable info.. can u please forward documents required for IES exam. 5. i need its part 1. can you please tell me where is it? For three rods placed in an equilateral triangle, or in an L formation, a value of λ = 1.66 may be assumed.

I want to ask question a bit out of this particular topic.Is there any criteria how much salt and charcoal is to added for pipe type of earthing having 75mm diam and 3 m long rod. But, there are some factor that affect the ground resistance of a ground system: Ref IS 3043 and Handbook on BS 7671: The Lee Wiring Regulations by Trevor E. Marks. How do you aririve 3 to 4 mtrs. for 1.5 Sq.mm Wire, Amp Capacity =6X1.5 =App 9 Amp 0000000656 00000 n

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