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STEOL RCD

Former Community Member
Former Community Member
So while reading up on AFDD’s to avoid being annoying on this forum I came across Self-Testing & End-Of-Life RCD’s... seems like a handy invention that would be of interest: 
https://www.westernautomation.com/solution-centre/electrical-protection-technology/self-testing-rcd/ 


Searching “STEOL RCD” reveals a few patents but little else so I guess I can’t pop down the shops to get one!

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  • 0
    "The WA STEOL based RCD performs self-testing every 2 to 3 seconds throughout the life of the product. It does this by generating a residual fault current within the RCD and this fault current is detected. "


    O.K., so the device wears its electronic parts out by using them every 2 to 3 seconds, BUT how does this actually test the correct operation of the mechanical moving parts, i.e. the opening of the main electrical contacts. What would happen if the innards were invaded by micro-spiders that block up the mechanism?


    Or have I got this wrong?


    Have a good 2020.


    Z.
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  • 0
    "The WA STEOL based RCD performs self-testing every 2 to 3 seconds throughout the life of the product. It does this by generating a residual fault current within the RCD and this fault current is detected. "


    O.K., so the device wears its electronic parts out by using them every 2 to 3 seconds, BUT how does this actually test the correct operation of the mechanical moving parts, i.e. the opening of the main electrical contacts. What would happen if the innards were invaded by micro-spiders that block up the mechanism?


    Or have I got this wrong?


    Have a good 2020.


    Z.
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