The AC mains voltages are 110 volts,220 volts, etc. and transmission voltages are 330 volts, 440 volts,11000 volts,33000 volts, etc. Why are these voltages always in multiples of 11?
2006-09-09 22:10:42 · 9 answers · asked by nikhilesh n 1 in Science & Mathematics ➔ Engineering
I think it has more to do with convention than with the number of poles in the generator. In our country the voltage between phase and the neutral is 220 volts and between the two phases it is 220 multiplied by square root of 3 which is approx 410 volts. After power is generated, it is stepped up to about 33 kilo volts or even higher voltage for long distance transmission. At the receiving stations it is stepped down to 11 kv and then to 440/410 volts. In USA the domestic line voltage is 110 volts.
2006-09-11 06:28:42 · answer #1 · answered by innocent 3 · 0⤊ 1⤋
In Japan the nominal AC voltage is a hundred volts. there is not any longer something magic approximately multiples of 11. It replaced into purely a handy variety that throughout good shape all the cirteria they have been utilising on the time. interior the U. S. we used to assert the mains voltage have been a hundred and twenty/240.
2016-11-07 00:45:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
the ac voltage or alternating (current) voltage. It is changing continously. The wave form is of a sine wave. The value which we get eg 220 volts etc all are the Root Mean Square(RMS) values. Vrms = Vmax/(sq root 2). Vmax can have desired values as per requirement. The appliances need that values, Vmax is changed.
2006-09-09 23:00:53 · answer #3 · answered by Charu Chandra Goel 5 · 0⤊ 0⤋
well in the U.S. your recognized voltages are:
120/240/480 low voltage
2400/4160 high voltage
7200/12470
7620/13200
13200/22836 (or 23 kV)
14400/24912 (or 25 kV)
19900/34500
46000
69000
115000
120000
138000
161000
230000
345000
500000
765000
but when searching for voltage you have to determine whether it is phase to ground or phase to phase voltage and to find phase to phase voltage if the phase to ground voltage is known then you multiply that by the square root of 3 which is 1.73 and that gives you the answer.
2006-09-10 00:30:38 · answer #4 · answered by noodle_212 2 · 0⤊ 0⤋
In Australia it's 240v HV is 11000 though. 3 phase voltage is 415v...
2006-09-09 22:22:51 · answer #5 · answered by mrsboonie 1 · 0⤊ 0⤋
for design of all electrical machines,transmission lines "form factor" is considered. form factor(R.M.S value/ Average value) of a SIN wave is 1.11(.777/.635). for making design calculation easy all the transmission ,generating voltage is multiple of 1.11( you can say 11 also).As we know Electricity generation is in SIN wave only
2006-09-10 23:06:45 · answer #6 · answered by Anonymous · 0⤊ 1⤋
My lecturer asked me the same question for which I replied the answer,
"I don't know!".
I think I haven't changed much all these days ;)
2006-09-10 03:51:45 · answer #7 · answered by Anonymous · 0⤊ 2⤋
This is all related to form factor.
2006-09-12 20:32:13 · answer #8 · answered by sanjay bansal 1 · 0⤊ 1⤋
reported
2006-09-09 22:42:15 · answer #9 · answered by edna..im beck!! 1 · 0⤊ 0⤋