we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?
IGC,
284What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?
247How to select batteries required for ups and the inverter if we Known load? And how AH is selected of battery?
201Post New Electrical Engineering Questions
how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size
what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?
Why the power generated in dams is complex power? Why the generators in dams cannot produce Real power directly (i.e power which has zero reactive part)?
Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?
how to select fuse rating for a 3-phase motor ???
If we need4× 50mm sq cable but it's not available so we can pull 4×25mm sq 2cables
Why do we need interlocking in a HT metering or Ring main unit switchgear?
Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?
how load of a turbo generator can be increased
How to calculate VCB rating for 33KV ,25 MW Power line?
why does a dc machine has high efficiency while working as a generator than as a motor ..
what is the differebt between ac and dc fuse?
Good day everyone,currently in our premise we using 30kw slip ring motor with resistance bank which we use as forward and reverse at conveyor bar handling. So,my question is how do we calculate the resistance bank which is suit the motor. Kindly,assist me... thank you
I am experienced with house and industrial wiring but I don't have any licence how can I apply an licence and which type of licence i can get i didn't complete deee just only experience
Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha
