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no image Saturday, December 16, 2017 by Katina Batts

What is cheap protection device ?

Hello all, I am Katina Batts from Canada I am working with "Oakville Electrical Contractor" company and I am here to gain knowledge and find different technologies. I hope this is the best way to explore the knowledge. 

Please suggest me cheap protection device.

Comments

  • by  David Ashton (edited)
    Katina, it is difficult to know what you are wanting, but I will assume it is an overvoltage protection device.


    The cheapest devices are varistors, also called Voltage Dependent Resistors (VDRs)  or Metal oxide Varistors (MOVs) or Transient Voltage Suppressors  (TVSs).  The Wikipedia article here gives you an idea of the types and how they work.  These are bi-directional devices usually used for protecting AC circuits from overvoltages (lightning etc).

    They are available in a huge variety of sizes, voltages and protection currents.  The ones I am used to - like the top photograph in the Wikipedia article - are like small disks, usually brightly coloured (though the colour does not mean anything)  and are often mistaken for capacitors.  You can get higher capacity ones that bolt onto a ground such as a switchboard enclosure.

    For DC applications there are the devices such as the P6KE series.  They are like high power Zener diodes and are available in voltages from a few volts up to several hundred volts.  They would be used for protecting DC power lines from overvoltages. Bidirectional types for AC are also available.

    I hope this has answered your question?

    Cheers / David



  • by  Max Maxfield

    Hi Katina -- as David says, it's difficult to know how to answer because it's impossible to tell what you are asking. Can you take a deep breath, slow down, and describe the problem you are trying to solve :-)

    • by  David Ashton
      Max, to be fair, it sounds like English is not Katina's first language.

      Katina, je parle Français, si tu prefère?


      • by  Max Maxfield

        @David: "...to be fair, it sounds like English is not Katina's first language..."

        You are correct -- I see that she's Canadian -- I run into a lot of this myself here in America -- fortunately I'm bi-lingual -- I speak both English and American LOL

  • by  David Ashton
    Max, to be fair, it sounds like English is not Katina's first language.

    Katina, je parle Français, si tu prefère?


    • by  Max Maxfield

      @David: "...to be fair, it sounds like English is not Katina's first language..."

      You are correct -- I see that she's Canadian -- I run into a lot of this myself here in America -- fortunately I'm bi-lingual -- I speak both English and American LOL

  • by  Max Maxfield

    @David: "...to be fair, it sounds like English is not Katina's first language..."

    You are correct -- I see that she's Canadian -- I run into a lot of this myself here in America -- fortunately I'm bi-lingual -- I speak both English and American LOL

  • by  Max Maxfield

    @David: "...je parle Français, si tu prefère?..."

    Wow -- you talk English, French, and Australian ... is there no end to your talents? LOL

  • by  David Ashton (edited)
    Nah mate.....   :-)


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