I don’t want this too be too late so just gonna throw this up rn and edit it later with my notes later so look forward to learning about capacitors :)

Fuck it we ball, capacitors what I know of them is they help motors start. In HVAC we got two of them run capacitor a and start capacitors. Motors that are aren’t 3 phase need a phase shift to get them going. Thing is motors need power coming in to be just right if a start capacitor is left running it will draw locked motor amperage and shut it all down so it’s put in series with a PTC relay (once this gets too hot it opens and shuts off power to the start capacitor) letting just the run to do it’s thing.

Capacitors need to be tested by isolating and discarding them and checking for capacitance in microfarads. The rating is usually on the capacitor and needs to be within ±10%. On the capacitor the voltage is supplied too with 2 different values. The higher value is the real one so this means you can use it on a size lower if you want. I’ve heard of testing them under load to fully get how they work,you take amperage on the start winding then multiply by 2652 then divide voltage across the capacitor to check if it’s good.

Anyway capacitors got oil in them to dissipate heat, thin plates of metal and plastic between them to insulate. These are used to store power, try not to fuck with them even unplugged they can still hurt you. The oil can also be an issue obvs. Anyway they store and discharge voltage they don’t boost it, at least in ac systems. If you read a higher voltage it’s most likely back EMF generated from the motor as it runs. Anyway you gotta take this into account when sizing relays.

One more thing capacitors when wired in series will have reduced capacitinace, 1/C +1/C but wired in parallel you just add them C+C. Probably doesn’t mean much to people but for electricians it’s useful if you don’t have the right size. Only connecting them in parallel is probably the only reason to do it practically.

Join our public Matrix server!

https://rentry.co/tracha#tracha-rooms


As a reminder, please do not discuss current struggle sessions in the mega. We want this to be a little oasis for all of us and the best way to do that is not to feed into existing conflict on the site.

Also, be sure to properly give content warnings and put sensitive subjects behind proper spoiler tags. It’s for the mental health of not just your comrades, but yourself as well.

Here is a screenshot of where to find the spoiler button.

spoiler

  • JohnBrownsBussy2 [she/her, they/them]@hexbear.net
    link
    fedilink
    English
    arrow-up
    15
    ·
    5 days ago

    Reposting in the new mega since I didn’t realize that it was up:

    Misgendering, drama in LGBT spaces (not super heavy though).

    Went to the local gay/LGBT bar last night for a bit. My gf wore a skirt and tights going out, which was their first time doing that at the bar. She had worn a skirt to work before, but this was the first time doing it in “public” I supposed. Overall, it was pretty chill. The bar itself is kinda lame (the drinks suck), but there were friends there so was fun to hang out and connect. Sunday is their drag open stage, so that was also fun, although there was a bit of drama. Apparently, one of the drag kings is a conservative, and heard that they were being bad-mouthed for being a conservative and confronted my trans masc friend there (also the drag king is friends with the trans masc’s mom who he still lives with, so yeah). I chatted a bit with one of my other trans masc friends whose style I am so jealous of, but he was pretty impressed that I did leatherwork (my gf showed off their spiked collar I made for them), so I hope the feeling is mutual. I can’t wait to finish up some pieces this week and get longer laces for my knee-highs so I can debut a killer outfit next weekend.

    A negative thing that happened, was my gf did get misgendered by the bartender incidentally, and I feel guilty since I kinda forgot to check in with them about it. I think that it was corrected/resolved, but I need to reach out and make sure they’re okay.

    • JohnBrownsBussy2 [she/her, they/them]@hexbear.net
      link
      fedilink
      English
      arrow-up
      10
      ·
      5 days ago
      spoiler

      Got in touch with my gf, and they confirmed that they had talked to the bartender, and it sounds like we both misheard the bartender since he said “dear” and not “sir” which is good to know. I’m just glad to hear that things are alright.