Answer / ujjal

its for the form factor that is the ratio between rms value
and avarage value. it becomes constant as 1.11. so we can
generate ac voltage that is multiply of 1.11

Answer / nitin goyal

mr.sunil for your information insulators are designed
according to lines,not the lines are designed for the
insulator disc, so please be sure before answering

Answer / swapnil

coz of form factor which is 1.11 and emf eqn of t/f is also
multiple of form factor whichmakes easy for t/f to transmit
at these voltages

Answer / shahid

transmission always done at high voltage becuase
1) To reduce losses, losses is(I2R) we step up
voltage simultaniously reduce current through
transformer as current is very less losses will
also be very less as losses is(I2R)
2) If we transmit at high current conducter size
will get increase because to increase current
resistance must be reduce. To reduce resistance
we have two way i.e either length of transmission
should decrease or area should increase because
resistance(r=$l/a)l=length,a=area
if we transmitt at high current size of conductor
will be very thick because length cant be reduce.

Answer / nitin goyal

Its not form factor, if it was so then why there are 400KV
or 765 KV lines.
Answer to it is just a coincidence, It all started in 1881
when first hydroelectricity generator was set up in niagara
falls. That generator produced 110V and then onwards it all
started with that
So it is a mere coincidence that there are 11,33,66,132 KV lines

Answer / ruddho

i have also this question. Its a request for everyone if u
know the answer correctly then plz answer otherwise not.

Answer / krupa s

to avoid thired harmonics

Answer / sunil kumar singh

each insulator disc of rating is multiple of 11 so we use 11,33,66kv

Answer / deben.

Answer this your self !

Answer / k.prakashchandra

The early AC incandescent bulb was of 110 V

how can i determine the KVA/MVA rating of transformer precisely?? is there any standard test?????

0 Answers  

why using carbun bresh in dc motor

3 Answers  

why shoud in High tension cable( above11KV etc.,)a semiconducting material coating will be there on insulation?

1 Answers  

what is name of transformer oil ?

58 Answers   L&T, MPSEB, OPTCL, Practical Viva Questions, Servo, TATA, XLPE, ZGL,

how much load 15kva dg set can bear

7 Answers  

What is ignitor and why it is use in Hpmv lamp ?

2 Answers  

Why derating factor os applied on Cables?

0 Answers  

can we use 220 volt 15 w a.c. lamp on 220 volt d.c.

6 Answers   TCL,

HAI,HOW TO SET THERMAL OVERLOAD RELAY FOR DOL STATRTER FEEDER AT START AND RUNNING?

4 Answers   L&T,

What are the causes of motor vibration?

3 Answers   Equate,

Befor synchronissation of Generator what test to be carried out.pl.specify with reason.

3 Answers   Kanoria,

While connecting the flood light plug on to the 415 V distribution panel,there was spark and the cable got burnt. Three ignitors of the flood light also burnt of. The lamps are of 400 W (total 6 lamps) connected through 1.5 mm2 cable. The plug was immediately removed from the circuit. There was a 30 mA RCD connected and a 250 A MCCB; however both did not trip. What could be the possible reasons for the circuit devices not to trip?Can someone assist please. Additional info if needed can be provided.

2 Answers