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Door Interlocked Isolator for Voltages of 110V or Greater

prephil
Hi, I came across the below in a document recently but can't remember where I got it from. It doesn't appear to be in EN 60204-1 2018. Could anyone confirm if it is true, i.e. any panel with 110V or greater needs a door interlocked isolator similar to a RS Stock No. 466-176
  • 0
    I do not think that switch you link to is always used interlocked anyway, but generally, no. Just as you can remove a light switch from the wall and expose mains, you can have busbar boxes, consumer units, switch gear etc. where the cover comes off and live bits are accessible.

    However, it should not be easy to do that by mistake, so needs tools (for example a screwed or bolted lid rather than say clips or wing nuts to get to anything dangerous) - if need be that may mean secondary covers over busbars incoming terminals etc once the lid is open. Standards have improved quite a bit over the years, and you are less likely to remove one screw and see a steel panel fall away to expose 3 phases on half inch brass bolts at nose level than maybe a few decades ago,
  • 0
    I think the answer lies somewhere within the eu Machinery Directives.

    The operator should not be able to access live parts inside a control panel without isolating the supply first. In order to assist with compliance, the main switch/isolator should be interlocked in order to only enable the panel door to be opened when the switch is in the 'Off' position.

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