https://stream.echo6.co/videos/watch/776ece50-1851-410a-99bd-130530526223 One of the most interesting things about this RCD/GFCI is that it is a type-A designed to detect pulsing DC from a mains voltage rectifier. Something that can defeat standard AC RCD's/GFI's in some fault scenarios. It appears that Rolec have had quite a lot of these breakers fail in the same way, including the single phase ones, and usually on the same terminal. I mentioned the large test resistor and then got distracted. It's basically a resistor that deliberately causes a test current to bypass the sense coil so it detects an imbalance. When you press the test button on an RCD/GFI like this it emulates a fault to show the breaker is detecting it electronically and then tripping mechanically. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- http://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty. Mon, 13 Apr 2026 20:23:22 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/776ece50-1851-410a-99bd-130530526223 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.