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Determine the minimum cable size for a 28A single phase final sub circuit originating from the distribution board supplied by three phase submain. The route length of the final sub circuit is 54 m. Assume 1% voltage drop in the consumer's mains. Submain specification: Cable: 50mm2 4 core V75 copper; Route length 42m; Maximum demand 135A per phase
1 5386what is difference between 2wire method and 4wire method of winding resistance testing of transformer?
1 3595What will happen if " not connecting the neutral point to ground of diesel generator output (380 V)", also if someone touched one phase without isolation from ground during the A/M condition what will happen to him?
3 6640sigal phase supply is 230 v ac two phase supply is 415 v ac why three phase supply is 415 v ac why not 690 v ac
4 8966Before i went to bed my master bathroom lights were working fine. At 2 am, when I went to use the lights, none of them were working. The outlets throughout the bathroom work, but the lights and fan above the toilet don't. I have two panels of switches. The one panel has four switches. One of the switches turns on the hall light, and that works. The other three are to other lights, and they don't. The other panel has three switches. One of those is to the fan, and the other is to a light above the toilet. The other is a to light that is also on that other panel. I tried the breakers, and the one that turns off the outlets, marked for the bathrooom, turns on and off the outlets. None seemed to be tripped. I checked the lightbulbs, and they are fine. Please help
2 5342If there is volagte between earth and neutral, what should be the reason ? and solution * What should be allowable limit in case, if the voltage between earth and neutral exist ? / OR what is limit for safe voltage between earth and neutral?
3 6490Post New Electrical Engineering Questions
what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?
what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm
A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.
What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.
how to calculate the Neutral transformer impedance?
how to select the isolation tranformer for siemens 802dsl cnotroller
The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?
Why neutral is not used in three phases dol starter
DG Earth Value?
anyone knows service engineer in chennai for EDM SPARKING MACHINE.CHMER PULSE CD 60 M.pL GIVE ANY CONTACT NOS
how we provide neutral earth on synchronising panel as per electrical standards?
What facility we get after CT secondary earthing and how?
how to calculate distance between busbar supporters for LT panel, what are the factors influencing in this design
Merits & Demarits of Oil circuit & Air circuit breakers ?
