Im stupid, a 800 VA transformer wouldnt draw min 3A continuously.
Was thinking about full power out of the transformer.
I could probably do with a single CL60 then, I am bypassing the NTC with the relay anyway after 100-200 ms or so. But using 2 x CL60 might be a good idea, since the inrush current is huge for a 800 VA transformer.
I know most of this stuff but sometimes my mind wanders.....lol.
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Maybe, but more never hurts, I am going to use Cvillers boards with dual output pairs and I might be rasing the bias pr. channel.
Besides, it is always nice to have a big enough transformer for any future firstwatt projects, you never know if NP has some higher powered versions coming sometime in the future.
just go for it - it's just 3W across that cap
be sure to check it's temperature while gadget is live - connected to mains
disclaimer - are you sure I'm bloody serious that you're in jeopardy if you're asking that sort of question , and playing with mains connected gadgets ?
basics first , playin' after that .
toyin' with 110/120/220/240Vac isn't best way of puzzle solving
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just go for it - it's just 3W across that cap
be sure to check it's temperature while gadget is live - connected to mains
disclaimer - are you sure I'm bloody serious that you're in jeopardy if you're asking that sort of question , and playing with mains connected gadgets ?
basics first , playin' after that .
toyin' with 110/120/220/240Vac isn't best way of puzzle solving
Eh, ok. Your answer is?........Im not totally sure....
Basically I just want to know if the higher value of the cap, 0.22uF vs 0.0033uF matters when it comes to filtering. Or if the 0.22uF cap will work fine as well.
Zc=1/(2 x Pi x F x C) = 1/ (2 x Pi x 50 x 220x10^-9) = 14K5
so - that cap is same as 14K5 resistor across 220V , considering that you're from Danskeland ;
P=I^2 x R
so - I= U/R = 220/14K5 = 15mA ......
P= 15mA^2 x 14K5 = 3W35
imagine 5 or 9W resistor across mains , scorching hot - dissipating 3W35 ....... that's so-so imaginable ....... but cap dissipating same amount of heat - ringing "I'm gonna explode !! "
in any case - caps are cheap , but with presumable intention - to buy exact and proper ones
so - that cap is same as 14K5 resistor across 220V , considering that you're from Danskeland ;
P=I^2 x R
so - I= U/R = 220/14K5 = 15mA ......
P= 15mA^2 x 14K5 = 3W35
imagine 5 or 9W resistor across mains , scorching hot - dissipating 3W35 ....... that's so-so imaginable ....... but cap dissipating same amount of heat - ringing "I'm gonna explode !! "
in any case - caps are cheap , but with presumable intention - to buy exact and proper ones
Well, then why even make a mains rated 0.22 uF cap when the thing really cant be used for mains filtering anyway due to power dissipation.
Thats a good one
Mains filtering is usually a bit more complex than a single cap - it can involve coils and bunch of other parts that make your head spin
Speaking of mains filtering. I have some EMI filters in the form of cord plugs that I plan on using. Is there anyone else that has used this type of plug? It has a schematic on the sticker that appears to have a 0.1uF cap across the + and neutral, then 0.4 mH coils in series with both lines, and finally two 2200pF from + and neutral to the case.
Thanks,
Everett
Thanks,
Everett
