A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

2816

Efficient electrical earthing in hard rock area

1572

In both 600/1000 V cable and 450/750 V cable, we can supply 415 V. However for distribution, all utilities are using only 600/100 V instead of 450/750 V. What is the reason?

1966

We have 5 Distribution sections with variable loads&We have 3 Gensets(500kva,380kva&250kva) our total load is between 400kva to 600kva. so how could we connect 3gensets.

1858

how harmonics generated in induction furnance? how minimise it?

2006

what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?

2276

explain with diagram how to protect transformers and substations from over current with help of CT's?

1954

Explain the operation of variable frequency transformer?

1138

I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?

1958

How do you determine the size of transformer radiators in a transformer?

1926

how to design step down 12 V, 1mA small transformer from 220 V AC? Because according to VI relation and power transfer it results bulky...

2091

Safety of on line ups

1950

what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation

1996

why electron produce magnetic field when it is in motion?

2150

how to find the resistance and gap volatage of the diode??

2057