8 ms·
I'm curious, which power breaker do you have?
by shrx 2y ago
I'm curious, which power breaker do you have?
- stavros 2y agoThis one: https://www.aliexpress.com/item/1005005657383634.html?spm=a2g0n.order_detail.order_detail_item.3.29d9f19cVGy4lV https://www.aliexpress.com/item/1005005657383634.html?spm=a2...
- wannacboatmovie 2y agoYou're running all your flat's power through that $14 Chinese rubbish and never assumed that shortcuts were taken or quality would be an issue? How do you know it will continue to function as a circuit breaker and isn't just a piece of wire inside? For the uninitiated, CE marking is meaningless (it allows for self-certification). I'd like to see Big Clive do a teardown of one of those.
- theshrike79 2y agoYou can get less shit ones that aren't made of Chinesium from Shelly
- wannacboatmovie 2y agoGreat suggestion. Some of their modules appear to be UL certified.
- baq 2y agoYeah you need to shop for these specifically. They come at a premium.
- theshrike79 2y agoSome of them (most of the latest models) are scriptable on-device. There are some ready-made scripts for the Nordics that check the current electricity prices and use those with some basic rulesets to see if the electric heating in a house should be on or off for example. I just use mine to turn off the ice machine at 22:00 so it doesn't run through the night :D
- stavros 2y ago> How do you know it will continue to function as a circuit breaker and isn't just a piece of wire inside? I don't care. I connected my previous breaker after it.
- wannacboatmovie 2y agoWhy not just use a current transformer? (Clamp over wire type) It's much safer.
- stavros 2y agoDo you know of a Zigbee one? That's also a good option.
- wannacboatmovie 2y agoSome options at the $10 price point on AliExpress, though I cannot recommend one, maybe another reader can. CTs are the generally accepted way to do this and don't have to modify mains wiring. Could also build your own; CTs are inexpensive.
- stevenhuang 2y ago> Why not just Please learn to never use this type of phrasing when offering suggestions. Your entire exchange was needlessly patronizing and off-putting.
- wannacboatmovie 2y agoThanks Dad.
- hurflmurfl 2y agoA bit funny, but I personally found "please learn to never..." to be MUCH more off-putting and patronizing than the "why not just...". Maybe just something about the latter being interpreted as a question, and the former being interpreted as an order.
- dist-epoch 2y ago> $14 Chinese rubbish Where do you think the "quality" devices are made?
- londons_explore 2y agoThere are 2 ways to design these. They could use a regular relay, or they could use a solid state relay. Solid state relays have widespread fraud. Like 60% of the ones on amazon will catch fire or fail before they hit the rated current. Trade suppliers generally don't sell them at >30 amps. Regular relays up to 10 amps are cheap and reliable. Beyond that, they get expensive surprisingly fast, and the reliability is hit or miss. They fail in numerous ways, but the most concerning one is the plastic case melting and catching fire. The chance of failure depends on the nature of the load (capacitive or inductive loads will dramatically shorten a relays lifespan). In my professional career, I have witnessed ~20 of the above devices failing, with melted bits or burn marks, but of that sample none has burned down a building, yet. But I'd say that was more down to luck than good design. In general, I would trust a china-device for monitoring power, but not for switching anything more than ~10 amps (1 outlet).
- baq 2y agoIs it the switching that kills the relay or is it enough to start/stop the load? E.g. if I have a 10A smart plug monitoring power on a small waist-tall freezer in the garage will it eventually damage the switching function?
- londons_explore 2y agoIts generally the switching, although I wouldn't professionally sign off an undersized relay on the basis of 'it never switches, so its fine'. The switching under load causes the contacts to get worn, then the large load causes the now-worn contacts to get hot, and the plastic supports melt and catch fire.
- squarefoot 2y agoA mains connected circuit designed to minimum costs could have all sorts of corner cuts: bad capacitors, no overvoltage protection, no back EMF from load protection, bad isolation to the driving circuit, etc, so that it could work flawlessly for decades, but also stop working after a while because of a spark that welded the contacts together, or mains voltage to enter the driving circuit because of moisture and insufficient creepage between high and low voltage tracks, etc. I use a lot of cheap Chinese products in non critical contexts, but I'd avoid them with mains voltage or in any safety critical use.
- whatble 2y agoThis is NOT a valid 63 Amps rated breaker, or 63 Amp anything for that matter. The screw terminal will melt. Based on the screw terminal, without looking inside, I would rate it not higher than 10 Amps. Don't pass your whole apartment through it.
- RedShift1 2y agoI have seen 63 A (and higher rated) equipment, this is not it. This is a fire hazard.
- deleted 2y ago[deleted]