While converting delta into star or star into delta ,the three values of resistances remains unchanged .Find out the value?Let In star R1=x;r2=x;R3=x On converting into delta,R12=x;R23=x;R31=x Find the value of x
1448if 11 lead acid batteries each 200 amph are connected in series so that combinly they can produce 110 volts dc. question is how much backup it can provide ? 2) how can we calculate that how much amprere and voltage is required to charge them . thanks in advance !
1 2860why neutral and earth should not be connected on 3 phase 440v/50c/s supply at consumer side. where as on 25kv/ac/50c/s railway traction substation neutral and earth will be connected and track at substation. and track will act as neutral and earth. Reasons for this is needed urgently
4 7534Why Nutral CT rating for Earth Fault Protection of Transformer neutral shall be 20% of Full load Current of Transformer
2 3994Hi all, please could anybody give me a suggestion about Electrical designs and calculations .. what text book should i follow as i am a trainee engineer and here work going not so favorable to me so please help me friends .. A small discription about my work which is going here is all about Electrical designs like cable sizing, lighting, lightning, Gensets sizing, motor sizing, transformer sizing, generator sizing, circuit breakers, PDB MCC PCC SLDB MLDB panels, Single line diagrams mainly, substation desings, cable routing and layouts, reactive power compensations, power factor improvement, voltage drop calculations, power generations, power transmission, power distributions all calculations i need .. please please if anybody experienced with this problem and got a solution then please help me .. just i need an apt text book for these all calculations and designs ..
1343suppose a fan is running with phase and neutral. if its neural is touched to body. then fan get stopped. if this fan is connected to phase and ground supply..then why it runs?
1 3434Post New Electrical Engineering Questions
WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.
I am about to write exam in RRB bangalore for the post of section engineer.please provide me with previous exam questions
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 IS says that neutral should be brought to switch box. and this one is a recomended practice
1.why we are using blocks in withoutgaplightning arrester 2.why we ar using bushing in withoutgap lightning arrestor
how to calculate compresor capacity?
in conventional fan regulators how the current varies with speed?
Why have to use copper cable for local isolator to motor ?
why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?
Which is the oldest hydropower plant in india?
I AM A ELECTRICAL PANEL BOARD DESIGN ENGINEER.IF I GO ANY INTERVIEW ,TECHNICALLY WHAT ARE QUESTIONS I WILL FACE FROM INTERVIEWER?
Why we make earth connection with Transformer Body and What will be the minimum size of copper wire as per code with respect to KVA rating of Transformer?
I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?
What is vacuum circuit breaker.define with cause and where be use it device?
11000volt DG set carnt kaise banvay
