surge suppressor

Discussion in 'Marine Electrical / Electronics' started by wonmore, Oct 5, 2018.

  1. wonmore

    wonmore Member

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    having issues with electronics on the ac side,like the digiital controls,module, digital display etc. on refrigerator, freezer,happens when shore power disconnect or shore power blackout.having some repairs done but my question is will a surge suppressor strip help with this?
     
  2. captjohn

    captjohn Captain

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    Unlikely it will help. They work with very brief drops, that's not what your seeing. When switching over it's always best to briefly shut down anything that gives you a problem.
     
  3. Genius

    Genius Captain

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    A 1:1 transformer may help with power quality and stray voltage. As mentioned above, reduce load by turning off breakers individually before flipping the main breaker or just pulling the cord out.
     
  4. captjohn

    captjohn Captain

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    That 1:1 transformer, also referred to as an isolation transformer, would be very large, very heavy and very expensive. Not to mention that isolation transformers are intended to prevent noise from coming in on the incoming power line, they isolate you from it, but this isn't the problem he is experiencing. He's experiencing power drop outs, all equipment is susceptible to drop outs, of differing lengths of time. Some equipment is just more sensitive than others. The selector switch, going between shore power and the generator, are break before make switches which result in no voltage during switch over, to avoid connecting the generator and shore power together even briefly, and the phase difference problem that would result, damaging the generator if the breaker on it doesn't trip fast enough. The only way to hold up the power during a dropout is a large capacitor, or a battery backup, neither of which it very practical. Do what the rest of us do in this situation, shut those pieces of equipment that are a problem off during switch over, then power them back up.
     
  5. wonmore

    wonmore Member

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    will do the surge strip and shut off all before shore power disconnect and generator start up and turn on each breaker at that point,thanks for all of your input.
     

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