A Ground Map Example - A system Design for Grounding

[@kb6dxn]

Virtual grounds on each device would solve the problem on the secondary side but the RF source needs an earth ground to filter out any lose RFI from getting into the other circuits. Great video..

[@KissAnalog]

Thanks for sharing! RF is an animal to itself - and it will bring some interesting conversations;)

[@theguitaramptech]

Thanks for this followup video, Eddie. This made the explanation much clearer from the previous Grounding video.

[@KissAnalog]

Thank you! I appreciate you!

[@anandarajchatterjee3589]

The way you explain things is really appreciated by me. You have a wonderful way of speaking and your smile in between your talks is really God gifted. I regularly see your videos which are really very informatic.

[@KissAnalog]

Thanks for the feedback great feedback Anandaraj! I appreciate you!

[@johnshaw359]

Telephone system in the UK uses -52V (positive end of the exchange battery strapped to "earth") to avoid electrolysis/leaching/corrosion issues on the wiring. I read that London Underground use a separate earth return system as early on they found if they didn't the earth current would leach chemicals from the ground due to electrolysing action.

[@KissAnalog]

Thanks John! That is very interesting! Thanks for the feedback!

[@eboy536]

I'm happy with your presentation ☺

[@KissAnalog]

Thank you! 😃

[@eboy536]

@@KissAnalog you are always welcome dear

[@electronicsprofessional3480]

It's great and clear details explanation 👌

[@KissAnalog]

Thanks so much - I appreciate you!

[@electronicsprofessional3480]

@@KissAnalog welcome dear

[@lurchpanda]

Thanks for the great video. Cleared up some questions I never got answers for in school.

[@KissAnalog]

Thanks for your feedback! I appreciate you!

[@northernelectrocaremppt2103]

Awesome presentation 👏

[@KissAnalog]

Thank you! I appreciate you!

[@northernelectrocaremppt2103]

@@KissAnalog welcome sir

[@__--JY-Moe--__]

yup! tying 2 the board & frame is an industry standard!! yup! some EE software, does this stuff automatically!! & does it well !! it's like cooking!! makes me hungry!! ready 4 some pizza & beer 4 breakfast!! good luck with this Eddy!

[@sunuk1915]

Wow 👌

[@KissAnalog]

Thanks for the great feedback! Time for some beer;)

[@faidulislam4111]

Congratulations from Electronics One Heart world's ❤

[@KissAnalog]

Thanks so much!

[@eboy536]

@@KissAnalog welcome dear

[@sunuk1915]

Thank you & congratulations 🎊 Great practical and theory 👏

[@KissAnalog]

Thank you so much for your feedback and support!

[@sunuk1915]

@@KissAnalog go ahead dear, you can reach stay self confidence, a idea every week can do a video with little DIY projects which very useful for students, younger Thank you

[@ga-nworlds185]

Cool Thank you very much 😊

[@KissAnalog]

Thank you! I appreciate you!

[@ga-nworlds185]

@@KissAnalog you are always welcome

[@versace885]

HI Eddie, Thank you for the follow up video and thank you for making it Crystal clear. Really like your videos.

[@KissAnalog]

Thanks so much for your feedback!

[@eboy536]

I'm really impressed with your every videos Congratulations & welcome 🙏

[@KissAnalog]

Thank you! 😃

[@MarcelHuguenin]

Great explainer Eddie, I again learned a thing or two ;)

[@KissAnalog]

Thanks for the great feedback! I appreciate you!

[@SpinStar1956]

I'm confused: You show each winding having a separate ground; to me this would only work if each transformer secondary was only-used as a half-wave rectification (single-diode in the upper-leg of the winding), because that is the only way you'd have a return for the DC to your ground. I could see if you were using full-wave rectification (using 2-diodes) and the center-tap was tied to ground. However, if you're using a full-wave-bridge then you could not tie the FWB's negative to a winding-ground; you could only capacitively couple it for noise. So, maybe I missed something, or I'm making something literal that you are implying symbolic. Anyway, great video as always & 73...

[@KissAnalog]

Great question - Thank you! Each winding is galvanically isolated from everything else (primary and other secondaries). Also, each winding generates energy which can be used to make an output voltage of your choice (given proper turns ratio). Each of these output voltages would be converted to a DC voltage (most often), and the current flowing into the circuit that this voltage would power would return back to its particular winding that it was generated. So, each winding can show, and should show a ground symbol unique for its output voltage - unless you choose to tie all the windings to the same return path. Does that make sense? I'll make a video explain this;)

[@SpinStar1956]

@@KissAnalog I guess I still don’t understand. What I see is the lower part of the winding attached to whatever ground for that system. But is that also the negative return for that systems power supply? Because the only way you can have the negative returned be grounded at that lower winding point is to utilize that winding as a halfway power supply with just a single diode in the upper leg…

[@nabman_]

Trying to wrap my head around how the isolation transformer is doing its job from a safety standpoint. Take the RF box for example: it's L is tied to chassis ground and therefore the PS S ground is tied to its chassis ground. Now the RF box is also tied to rack chassis ground and the latter is tied to P ground (and earth ground). Touch S L and the current can return to S N and cause electrocution. Am I missing something?

[@KissAnalog]

Thanks for the great question. For there to be a current path - there has to be at least one series loop (voltage source with both ends connected - as in a short, or connected through a load). The only current that can flow through the chassis is in the RF circuit - to and from the winding providing the power. And there's the input EMI caps and chassis to Earth ground. But there's no path from primary to secondary;)

[@BogdanSerban]

P ground and chassis ground are never tied together. There are usually decoupling caps between P ground and chassis ground (earth), but that's about it. Secondary-side grounds are sometimes tied directly to earth for noise supression.

[@KissAnalog]

Yes you are right;) But technically, secondaries are physically tied to chassis which is then tied to earth - if the input power provides the earth ground connection. On a ship of car the chassis is floating of course;)

[@RCook-iy4xk]

You really need to show us a physical layout, on an actual piece of equipment.

[@KissAnalog]

Thank you! You are right - and I will:) I had to layout the groundwork so in future videos where I talk about this and show examples we will have something to look back at to speak to.

[@randysterling4700]

Maybe edit the video so we don't have 1 minute of staring into space at beginning.

[@sunuk1915]

Nice openion, thank you

[@KissAnalog]

Thanks so much! I was in a hurry to post this and it has been a long day and I forgot to edit the beginning;) I corrected this but it might take a bit for youtube to update. I appreciate your feedback!