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  • Why transmission voltages are multiples of 11?

    KARAD123

    Member

    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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