3 wire submersible pump surge protector

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by andybull, Jul 30, 2020.

  1. andybull

    andybull New Member

    Jul 15, 2010
    South Carolina
    I want to install a surge protector at the well head for my 240 volt, 3 wire submersible pump. Is there such a thing and if so, what is the name and model number? By three wire I mean, a wire for the red, black, yellow leads plus a ground.
  2. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
    If you install your control box outdoors at the well, you could protect about as well with a 2-wire + ground protector.

    The surge would be coming from the powerline generally, I would think. Or a strike nearby the well would still use the power lines as a path to cause potential damage. A direct lightning strike is rare.

    You could use a 3-phase protector to protect after the control box. Would a 240 3-phase protector be a high enough voltage rating, or would the start winding (red wire) require a higher rating? A control box with a run capacitor (CRC) may limit that voltage. I don't know. In https://www.zoro.com/eaton-surge-protection-device-3-phase-480v-cvx050-480d/i/G1958171/ note that it does "filtering", which may be important to your mission.

    I am not a pro, and maybe somebody will have better info.
    Last edited: Jul 30, 2020
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  4. Boycedrilling

    Boycedrilling In the Trades

    Sep 30, 2013
    Royal City, WA
    Normally a surge protector is installed at the control box with a 3 wire pump or at the disconnect or breaker.

    I don’t normally install them, so I can’t recommend a brand. Years ago I worked for a company that installed Red Jacket Pumps. Red Jacket included a surge arrestor with every control box. At that time red jacket was an independent company and made their own pump ends, motor and control boxes. Now they are part of Xylem and just another brand name for their products.

    on large VFD installations I use the Raycap arrestors, they cost $3-500.
  5. tvl

    tvl Member

    Jul 5, 2006
    South Carolina
    Over the years, I've had two 1HP control boxes that came with the following installed inside the box:


    I've also purchased a couple of the same a number of years back. One did its job by saving the equipment it was connected to. If you can get one, I don't think you would be disappointed. The size fits perfectly inside a Franklin motor control box.

    Hope this is helpful.
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