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  • Phase loss indication

    Er_Mahendran

    Member

    Updated: Oct 27, 2024
    Views: 1.1K
    Hello Engineers,
    I want to indicate the loss of phases in three phase supply through LEDs. How to do that?

    Kindly suggest solution on this.
    Thanks in advance!
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Replies

  • Munguti

    Member • Jul 15, 2009

    You question isn't clear.
    When you say display through LED do you means that you are using an LED powerd display more like the lcd display in digital hand watches?
    Please be clear.
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  • Er_Mahendran

    Member • Jul 15, 2009

    Sorry. My question is how to connect LED in three phase supply (415Vac) to indicate that the particular phase is failed. (i.e not lighting the LED for failed phase)
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  • reachrkata

    Member • Jul 15, 2009

    Simple !!

    Step-down, rectify and filter each of the phases separately into 3 DC voltages which power 3 different LEDs. When any of the phases fail, the corresponding LED switches off.

    -Karthik
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  • Er_Mahendran

    Member • Jul 27, 2009

    Hello,
    Sorry. My requirement is without step down and rectification, I want to connect LEDs in 3 phase 3 wire to know the phase failure. How to do that?
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  • kashish0711

    Member • Jul 28, 2009

    Here is an image illustrating #-Link-Snipped-#'s idea. Remember you van use either a proper 3 phase transformer or you can use a CT, both are same, the 3 phase t/r just gives you more control. 😀





    [​IMG]
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  • cooltwins

    Member • Aug 4, 2009

    very good illustration!!!

    I DIDN'T GET THE IDEA FIRST BUT THE DIAGRAM WAS ENOUGH TO HELP ME

    KEEP UP THE GOOD WORK MATE!!!!
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  • reachrkata

    Member • Aug 5, 2009

    There is no way LEDs will directly work with normal AC. You do need to step it down either by a transformer or by using a resistor potential divider to bring down the voltage to manageable levels.

    -Karthik
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