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How to filter noise?

Discussion in 'Electronic Basics' started by js, Jul 11, 2003.

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  1. js

    js Guest

    We have a control board that shuts down equipment for safety reasons and are
    having spurious trips. There are various 120VAC (low current) lines coming
    from heavy equipment going to our relays and we suspect these lines are
    carrying a high amount of noise that are causing us problems.

    How can I filter the noise from these lines and not diminish their
    robustness in any way?

  2. Neil

    Neil Guest

    Could try adding inline filters ? In UK they're readily available from RS
    or Farnell. In US from Newark or Digikey ?
    If they are low current lines (less than 5 amps) then they won't be too
    May need filters on incoming and outgoing lines to stop noise getting in
    from either end ...
    Maybe ensure control board case is grounded and acts as a shield ?
    Maybe add inline-filter to control board unit power supply in case noise is
    being picked up that route ?
  3. js

    js Guest

    These would need to be wired in-line (OEM) rather than have a plug
    receptacle. Yes, low current. I must be searching on the wrong thing, none
    of the hits are close. What exactly should I be looking for?
  4. Neil

    Neil Guest

    Try - a search for "filter" turned up laods of things, part
    number CCM1303-ND cost $12.78 each
    might be similar to what you want ?
    In (RS Components, UK) there are ... 167-6793 Schaffner range
    If they sound like the sort of thing you need, how about printing out the
    pages with pictures, and going to your local hardware store or electrical
    supplier and asking if they have anything like it?
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