Who knows, they probably mass produce million of them and can afford a lower price. But I wasn't talking about the capacitors, I was talking about the inductors. If they turn out to be working and of good quality it's a steal, you'd have inductors for a whole filter at a very affordable price.
There's only one way to find out.
There's only one way to find out.
Apparently these are special “E” types with an earth line choke. Supposed to be used in situations with PE problems/ground loop interference. Value of the earth line choke seems to be the same over the various types. No current rating mentioned.
It is mentioned that these are special coils and even then they may not be allowed. Just read a few of such datasheets. They are not the usual filters. It is even said:
It is mentioned that these are special coils and even then they may not be allowed. Just read a few of such datasheets. They are not the usual filters. It is even said:
- Separating the main earth line to periphery devices
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Bingo. These inductors are actually available in Easy EDA and can be bought from the stores quite cheaply.
I'll make a version of the filter with these and use the edits you all suggested.
I'll make a version of the filter with these and use the edits you all suggested.
- Removing PE inductor and resistor that separated the earth
- Move the two 0.1 ohm resistors near the input, replacing them with fuses instead
- Add the SBL3045 + capacitors at the input after the fuse, on the main board
- Connect the GDT to N and L, after the fuses
- I guess RV1 and RV2 are not necessary anymore?
Here are 160 power line filters with a series choke in the Protective Earth line: (link)
I've attached the engineering datasheet of one of them, below. The datasheet states its applications include medical devices and in-vitro medical devices. Notice the safety certifications.
You can remove the ground loop breaker. It is only needed in some devices and does not belong in a DIY mains filter. The way it is constructed now only lifts only the metallic shield from PE which is wrong. It does not break any other ground loop so it won't have any influence on a ground loop of devices.
Design criteria as they are now seem to be a filter design being a jack of all trades. This filter should filter, protect from overvoltage, overcurrent and residual DC and that is already more than the usual filters. You don't want to mess with safety and you also want it to be able to stay connected unattended when the load is switched off isn't it? Also connect metallic shield straight to PE.
You could add an extra screw connector pin or 6.3 mm faston spade just after the DC blocker PCB pads so that the DC blocker is an option. "AC in DC" and "AC in" or L, L*, N, PE. The screw type connectors with M3 screws are more sturdy for higher currents IMHO. Currents that may not be the normal currents but short-circuit, clamping currents or currents caused by a defective load. I think the filter PCB tracks should be layed out for 16A maximum currents as usual in 230V areas.
Whatever stuff is made, tested and approved for use in special applications: don't interrupt PE. Also a mains switch would be a good addition when it feds a few devices. Stuff that is off won't pose any possibly threat being unattended.
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No problem, I just hope I add something useful. Please note I haven't checked or tested this particular filter itself for its filtering properties/qualities.
BTW in the video by Patrushin it can be seen that he actually did implement fuses in both L and N (for non polarized areas like the EU) and no DC blocker. He did not care much for his own safety. He tests with 110V and a US plug.
BTW in the video by Patrushin it can be seen that he actually did implement fuses in both L and N (for non polarized areas like the EU) and no DC blocker. He did not care much for his own safety. He tests with 110V and a US plug.
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I think it would be better if you put them at the end.
Next, don't use components that you can only find in China. Use what you can find at authorized distributors, digikey, tme, mouser, farnell.
Otherwise, you can buy ready-made filters from aliexpress...
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One would think removing DC is beneficial to the following inductive components. Maybe tomato/tomahto.
Could also make a board compatible with various inductors using various holes depending on what's available in your country
Good for you 😔
When you have some time please take a look at your websites and give me the model of the inductors, so I can check here and possibly continue with the pcb 🙏
When you have some time please take a look at your websites and give me the model of the inductors, so I can check here and possibly continue with the pcb 🙏
