+ Post New Thread
Results 1 to 20 of 24

16th December 2005, 10:27 #1
 Join Date
 Aug 2005
 Location
 india
 Posts
 56
 Helped
 5 / 5
 Points
 1,660
 Level
 9
220v rms
sorry for this silly question .but i can't find the answer anywhere..

16th December 2005, 10:45 #2
 Join Date
 Oct 2004
 Location
 West Coast
 Posts
 7,942
 Helped
 2324 / 2324
 Points
 74,061
 Level
 66
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
 Join Date
 Jul 2005
 Posts
 44
 Helped
 3 / 3
 Points
 1,507
 Level
 8
220v rms?
It is in RMS... same as 110V in power lines

16th December 2005, 12:42 #4
 Join Date
 Nov 2004
 Location
 Chennai, India
 Posts
 188
 Helped
 21 / 21
 Points
 2,225
 Level
 10
110v vrms
its RMS
1 members found this post helpful.

16th December 2005, 13:03 #5
 Join Date
 Nov 2004
 Location
 Tamilnadu
 Posts
 657
 Helped
 36 / 36
 Points
 5,970
 Level
 18
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
 Join Date
 Sep 2001
 Posts
 76
 Helped
 24 / 24
 Points
 3,556
 Level
 14
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, 14:59

16th December 2005, 16:46 #7
 Join Date
 Aug 2005
 Location
 UE+MIT, Philippines, (14°N , 120°E )
 Posts
 662
 Helped
 82 / 82
 Points
 7,347
 Level
 20
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, 20:44 #8
 Join Date
 Sep 2001
 Posts
 76
 Helped
 24 / 24
 Points
 3,556
 Level
 14
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
 Join Date
 Feb 2007
 Posts
 1
 Helped
 0 / 0
 Points
 1,045
 Level
 7
relation between rms and peak value
220 is rms.peak voltage is 1.4*220=308v

13th February 2007, 14:12 #12
 Join Date
 Feb 2007
 Posts
 4
 Helped
 0 / 0
 Points
 1,085
 Level
 7
rms voltage 220v
it is a RMS voltage

14th February 2007, 01:57 #13
 Join Date
 Jan 2007
 Posts
 30
 Helped
 0 / 0
 Points
 1,152
 Level
 7
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
 Join Date
 Jan 2007
 Location
 India
 Posts
 195
 Helped
 9 / 9
 Points
 2,347
 Level
 11
rms and peak to peak
RMS VALUE

14th February 2007, 09:17 #15
 Join Date
 Sep 2001
 Posts
 76
 Helped
 24 / 24
 Points
 3,556
 Level
 14
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
 Join Date
 Feb 2007
 Posts
 241
 Helped
 13 / 13
 Points
 1,993
 Level
 10
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
 Join Date
 Aug 2006
 Posts
 11
 Helped
 0 / 0
 Points
 1,168
 Level
 7
310v sine rms
It should be rms.

14th February 2007, 12:57 #18
 Join Date
 Apr 2006
 Location
 India
 Posts
 114
 Helped
 9 / 9
 Points
 2,033
 Level
 10
26 vrms vs peak
Its RMS .Please check BL thereja u can get all the details.

14th February 2007, 13:40 #19
 Join Date
 Feb 2002
 Location
 Italy
 Posts
 410
 Helped
 50 / 50
 Points
 5,617
 Level
 17
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
+ Post New Thread
Please login