Why transmission voltages are multiples of 11?

KARAD123 · 2012-07-21T06:55:19+00:00

WHY ARE ALL THE VALUES OF VOLTAGES OF TRANSMISSIONS ARE IN MULTIPLES OF 11, MEANS 11KV, 33KV, 110KV, 220KV.? MY TEACHER ASKED US THIS QUESTION. PLZ HELP.

Why transmission voltages are multiples of 11?

KARAD123
@karad123-P0ab75

Updated: Oct 27, 2024

Views: 1.2K

WHY ARE ALL THE VALUES OF VOLTAGES OF TRANSMISSIONS ARE IN MULTIPLES OF 11, MEANS 11KV, 33KV, 110KV, 220KV.? MY TEACHER ASKED US THIS QUESTION. PLZ HELP.

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Kaustubh Katdare

Administrator • Jul 21, 2012

Look -

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Do post your thoughts 😀

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sree_23

Member • Dec 29, 2012

why the transformers in transmission step up/down at the voltages which are multiples of 11..,like 33kv,66kv,121kv,etc?

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Kaustubh Katdare

Administrator • Dec 29, 2012

Take a look at these threads: #-Link-Snipped-#

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pinank

Member • Dec 29, 2012

its been a convention from olden days... there is no specific reason to it...

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Sparker

Member • Jan 10, 2013

its not that it must be multiple of 11. Actually in olden day the used the multiple 1.1 i.e. formfactor for sine wave ,so that computation will be easier on design.its not 11 ,its 1.1 and its not compulsory.Infact not UHV,HVDC are not multiples of 1.1 .

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sree_23

Member • Jan 11, 2013

certainly thanks a lot frnds who have replied me with the apt answers😀😀..............

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Jeffrey Arulraj

Member • Jan 11, 2013

sree_23
certainly thanks a lot frnds who have replied me with the apt answers😀😀..............
Nice to see your active involvement here. But a little of topic It will be even more better If you can avoid SMS language here in the forums

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ani the legend

Member • Jan 13, 2013

KARAD123
WHY ARE ALL THE VALUES OF VOLTAGES OF TRANSMISSIONS ARE IN MULTIPLES OF 11, MEANS 11KV, 33KV, 110KV, 220KV.? MY TEACHER ASKED US THIS QUESTION. PLZ HELP.
depends on the form factor .... for a.c its 1.11

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sree_23

Member • Jan 13, 2013

oh yeah i accept what you say....., i'll do so😀.....

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sree_23

Member • Jan 13, 2013

oh yeah i accept what you say to avoid message language ....., i'll do so😀.....

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Akhilesh Garud

Member • Jan 15, 2013

ani the legend
depends on the form factor .... for a.c its 1.11
is there any exact relation of its dependency on form factor?

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eris

Member • Jan 15, 2013

I hope it s dependent on RMS value n form factor. . Both r directly proportional to each other

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m.b

Member • Mar 1, 2013

please frnds try to answer it as I have been lukng for it for a long ago

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mallumatmari

Member • Mar 11, 2013

Only extra high voltage systems(super grids) have voltages in multiples of 11. I think because those transformers have 1:11 or 11:1 ratio. Simply guessed, don't know anything about that.

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Kaustubh Katdare

Administrator • Mar 11, 2013

This is one of the most favorite questions asked by electrical engineers on CrazyEngineers 😀 . Check the following discussion thread -

<a href="https://www.crazyengineers.com/threads/why-transmission-voltages-are-multiples-of-11.61487">Why transmission voltages are multiples of 11?</a>

I'm merging the discussion threads.

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Jeffrey Arulraj

Member • Mar 12, 2013

Hey Big guy Why not pinning this thread here That would solve the extra load you guys already have Do so man

The_Big_K
This is one of the most favorite questions asked by electrical engineers on CrazyEngineers 😀 . Check the following discussion thread -

<a href="https://www.crazyengineers.com/threads/why-transmission-voltages-are-multiples-of-11.61487">Why transmission voltages are multiples of 11?</a>

I'm merging the discussion threads.

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shiv786

Member • Mar 20, 2013

form facto is rms value upon avg. value
and value of form factor is 1.11 for transmission
so in my opinion that's the reason.....

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n.rajeev sharma

Member • Mar 27, 2013

it is due to form factor

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