Answer / srij21

It is the requirement of the machine.we can either operate
in 440 or 220 or even in 110 volts.The voltage depends upon
the motor,circuit and other loads related with the machine.

Answer / krish

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insulation requrement will decreases.
hence reduction in cost of machine.

if requrement is 440 v then using costly machine is
preferrable.

Answer / ginijayaram

please connect one end of the same watts lamp in each phase
and other end of the lamps connect common point . then take
that point is zero potential. and take one phase in one lamp
side.that two points give to 220 vols in machine

Answer / ashutosh

b/c if voltage decreases therefore the current is increases
due to p=v*i & hence if current is increases therefore the
magnetic flux will also increases & hence there is good
magnetic strength will occurs

what is the highest transmission voltage in india???

49 Answers   Bhel, EIPL, Engineering, Jindal,

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Three set (each phase contain 2 cable of 400 mmsq CU XLPE AWA) of single core cables are connected to 11 KV motor of 14 MW & the switch gear supplay is taken from 11kv feeder & this supplay taken from 275 KV substation. Problem is one pair cable(L3- 2 cable ) getting very hot & gland melted and damaged in switch gear side. the other two cable haven't any more hot(ambient temp only & L3 haveing 95- 100 Degree C. The same problem happened in 275 KV substation switch gear side also where the supply taken for 11 kv switch gear. But here L2 phese cable had problem. Why it is happening like this?. The cable having temperature different at different location from gland side inthe case of 11KV feeder of 275 kv substation. why ?

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