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16th December 2005, 10:27 #1
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220v rms
sorry for this silly question .but i can't find the answer anywhere..

16th December 2005, 10:45 #2
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220 v rms
It is RMS ..
If you would like to read more on this issue, here is a link:
http://www.eng.uct.ac.za/~victor/electric/ACDC.htm
Regards,
IanP

16th December 2005, 10:45

16th December 2005, 10:59 #3
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220v rms?
It is in RMS... same as 110V in power lines

16th December 2005, 12:42 #4
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110v vrms
its RMS
1 members found this post helpful.

16th December 2005, 13:03 #5
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relation between rms and peak
moreover .why it should be RMS ....why should not as +340V,340V while referring

16th December 2005, 14:59 #6
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relation between rms and peak voltage
Originally Posted by electronics_kumar
e.g. for resistive loads power can be simply calculated multiplying current and voltage rms values: P = Vrms * Irms, whatever waveform it represents!
(or P = Vrms*Vrms/Rload, or P = Irms*Irms*Rload, likewise with dc values)
Referring to the peak value (only for sine waveforms!!!) power would be calculated:
P = Vpeak * Ipeak / 2 (or P = Vrms*Vrms/(2*Rload), or P = Irms*Irms*Rload/2)
It allows to compare or evaluate "power contents" of different waveforms in a way, while its peak values don't give any information as to this point.
Best Regards
Eric

16th December 2005, 16:46 #7
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rms 220v
Try to grab a Digital Multimeter (select it as to measure AC voltage with range of at least higher on what you are expected to measure) Now read the Meter, it should read 220V (note all meter device should read RMS values)

16th December 2005, 16:46

16th December 2005, 20:44 #8
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220 vrms
Originally Posted by the_risk_master
For instance waveforms in circuits with a phase controlled SCR (thyristor or triac) give quite big errors measured with nontrue rms devices.
Just for interest, the mentioned values are defined as follows:
For periodic waveforms v(t):
mean value =
rms value = ,
where T is the time period.
Sine wave:
If v(t) = M×sin(ωt),
where M ... peak value of the sine wave,
ω = =  ... circular frequency, we obtain:
mean value = 0
if fully rectified, then
mean value = = 0.637M ... relation between mean (fully rectified) and peak value
rms value = = 0.707M ... relation between rms and peak value
rms/mean (fully rect.) = = 0.707/0.637 = 1.11 ... relation between rms and mean value of fully rectified sine wave
Best Regards
EricLast edited by BlackMamba; 27th August 2010 at 12:58.

19th December 2005, 04:51 #9
sin rms peak
Root Mean Square

19th December 2005, 04:51

24th December 2005, 22:04 #10
220 v peak to peak
Originally Posted by ysenthilece

13th February 2007, 03:07 #11
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relation between rms and peak value
220 is rms.peak voltage is 1.4*220=308v

13th February 2007, 14:12 #12
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rms voltage 220v
it is a RMS voltage

14th February 2007, 01:57 #13
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i rms i peak
it is exaclty rms (root mean square) and it peak voltage is √2×220 (v).

14th February 2007, 06:38 #14
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rms and peak to peak
RMS VALUE

14th February 2007, 09:17 #15
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it(rms) scr calculation
Are you collecting points or what?
STOP these stupid messages, everybody already KNOWS it is rms!!!

14th February 2007, 09:27 #16
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calculate 220 rms peak value
if its a sine wave its rms value..
if its a nonsinusoidal wave it wont be RMS...any way becoz every wave can be converted as composition of sine wave there is a true rms meter which gives rms for any wave..gen all ac and dc volts xpressed in rms ..

14th February 2007, 12:12 #17
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310v sine rms
It should be rms.

14th February 2007, 12:57 #18
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26 vrms vs peak
Its RMS .Please check BL thereja u can get all the details.

14th February 2007, 13:40 #19
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220v rms peak
It is RMS, the peak voltage is RMS * sqare root o f2, say about 310 V.
The multimeters ( low price ) usually rectify the voltage ( taking the peak voltage ) and then they divide it by SQRT of 2.
Mandi

19th February 2007, 22:48 #20
p=vrms*irms
It's RMS!
Low price multimeters aren't True RMS, but if the signal you are messuring it's a Sine Wave there's no problem!! If not, the values shown would not be correct.........

19th February 2007, 22:48
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