As someone who works maintenance in a factory, this video was really spot on! I know we use a lot of 24V DC contactors as well, and their coils can be very different looking sometimes, but other than that I'd say you covered pretty much everything 👍
1 year ago | 15
Also something to note that typically larger ones, especially industrial ones will have aux contacts for monitoring if it's actually on or off for any fault detection and troubleshooting
1 year ago
| 116
Can't wait for more HVAC systems to switch to VFD and "brushless" motors. Great for managing condensation and humidity, in addition to the efficiency benefits.
1 year ago | 12
Thanks for following up on your content and keeping it up to date. That's why do many of us love your channel. 🖤
1 year ago | 10
If you take the tape off you may see a different gauge wire and if you measure the resistance of the coils you will see a difference there too
1 year ago | 10
Alex, this reminds me of my childhood/youth and phone switching centers. I know people (older than I) who described what it was like in a big switch center for ATT when JFK got shot (the sound of mechanical switches). When I was very young, I wound up at Bell Labs working on telemedicine with a team that almost all came from Videphone (yeah the real stuff shown in 2001). They got cancelled a few weeks before going live in Manhattan when the Stock Exchange switch fell through the floor, and in the disaster response all new systems got bumped. The switch was so heavy due to mechanical switches (cousins of contactors) weighing so much the floor (not in great shape) broke. It dragged cables, but much kept working, but had to be fixed. By the time I started at Bell drop out hacker on PC systems supporting new product dev), the big thing was recovered real estate when digital switches cleared out whole buildings of mechanical switches for a few racks of solid state gear
1 year ago | 2
I was a tiny bit disappointed that you did not mention that some contractors do not use magnetic coils but instead use heated elements to actuate the contractors. I am not sure if these use bimetallic strips or paraffin pistons or what, but they are in essence a built-in time-delay especially useful for things like a/c compressors! My furnace uses several of these in something called a sequencer instead of any electronics at all!
1 year ago
| 39
Dope. I work in the controls space and I can say while a lot of things are moving to VFD. Across the line starters arn’t going anywhere fast.
1 year ago | 4
DC coils are quite different in construction to AC coils, but within the same type of current, the only difference between voltages are the number of turns and the insulation rating
1 year ago | 1
Really liked your video on contractors. It gave a few ideas for some ways I can use a smart switch that is designed for low amps to power some high amp load liked holiday lights or landscape lights
1 year ago | 0
Why did YouTube tell me about this, but never told me about the actual video?
1 year ago | 4
Hi! I just want you to do a video on how a gas fridges works, and maybe even one about peltier elements. Thanks for great videos, I really enjoy and appreciate them.
1 year ago | 0
Off topic, but one of the most useful, and older, technologies that's still in use everywhere are barcodes and scanners. There's a wealth of history and evolution of the technology from analog (which is still used) to digital. It would make a really interesting deep dive IMO.
1 year ago (edited) | 0
My dad has talked to me about something called Microfiche, and the ways it was viewed in Libraries. I'd like to learn more about it (and maybe other similar types, old and new- etc). He said you'd view stuff in a small face-projector thingy, like in those old cartoons where a character puts in a quarter and watches a lady dance or something frame by frame.
1 year ago | 0
Hey this is not related to the post but I’ve been wondering if you could make a video about the E.O.T. (Engine Operating Telegraphs), I think they’re very interesting but can’t find any info on how they really work. All I can find is how they were operated but not the inner workings, if you get what I’m saying. Thanks and I love your videos!
1 year ago | 0
Technology Connections
Hey everybody! I forgot to include a clip of the two contactor coils together... probably because the 120V coil is wrapped and thus not really exciting. There's not a lot to see!
But in case any y'all were curious, well here's the only part that's meaningfully different between the two.
1 year ago | [YT] | 1,842