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Has anyone seen this - Voltserver: "Digital Electricity"
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PlainName:

--- Quote ---But HOW are you determining if it's safe?
--- End quote ---

Don't know. But, as I suggested previously, the sender could tell the receiver how much power to expect in the pulse and if it's not all there then there is a problem. Surely that's just the same as many mains fault detection works.


--- Quote ---Also, again, it would still have to react within a millisecond!
--- End quote ---

For crying out loud - there is NO REACTION TIME involved. The next pulse is ONLY sent if the previous one was safe. Thus any reaction time is in getting another one to be delivered. How many more times do this have to be said before you read and understand it? The next pulse won't be delivered until the receiver says it is OK to send it. That's what the data comms part of this setup does. It's not for bloody cat videos on youtube but an integral part of the safety. And fail safe at that - no comms, no power.


Cyberdragon:
I didn't remember which one was the period in PSPICE! (the 1.1ms or the 1.5ms)

I also, NEVER SAID HV! I meant for something like 48V! As I'll state below, just because they're using HV to try and avoid getting to close to max current ratings, doesn't mean shit if they're doing it wrong!

Also, again, videos mean nothing (batteroo has them too! they can be faked you know.). Plus, like I said, i'm never going to believe it's safe until you say HOW it's detecting if there is someone across the lines during the off periods!

If you've watched the video, then give me their advantages in terms of numbers.

Also, functional != good idea or improvement. An IOT spoon can function, but does that make it a good idea?

The ABSOLUTE MAX for CAT6 is 300V. http://www.pacificcable.com/Cat_6_Tutorial.htm For proper engineering (if you know it!) you'd never run a cable at it's max rating!

https://www.wireandcabletips.com/cable-insulated-wire-safety-requirements-part-4-voltage-current-capacities/


--- Quote --- In direct current (DC) system, the rated voltage of the system should be no higher than 1.5 times that of the nominal voltage of the cable.
--- End quote ---

So again, there's some miss information going on that video, as they are definitely either not running it through data cable, or they're violating codes. I don't know how they're running the pilot installs, but they are certainly not using CAT6 (or at least not using it properly)!   

P.S. To address the new post, mains fault detection only works to ground, not across the lines!

Of course there's reaction time! It has to determine whether it's safe or not within a millisecond in order to send the next pulse within that time frame. So it means it has to run that routine in a millisecond! If they're using reflected impedance testing it would have to measure and make a determination that fast, regardless of the length of cable!
ogden:

--- Quote from: Cyberdragon on February 18, 2018, 12:11:28 am ---I didn't remember which one was the period in PSPICE! (the 1.1ms or the 1.5ms)

--- End quote ---

Memory span of goldfish?  :-DD


--- Quote ---If you've watched the video, then give me their advantages in terms of numbers.

--- End quote ---

30% less cost of power supply BOM compared to AC mains supplies. Does it count?


--- Quote ---Also, functional != good idea or improvement. An IOT spoon can function, but does that make it a good idea?

--- End quote ---

What?!


--- Quote ---mains fault detection only works to ground, not across the lines!

--- End quote ---

What? Please elaborate


--- Quote ---The ABSOLUTE MAX for CAT6 is 300V.

--- End quote ---

Yes. It means that it's rated for 300V :) You can try to twist it as you want but truth is as it is.
Cyberdragon:
I don't use PSPICE, hence I don't remember (yes, I know I should start using it).

30% less huh? Is this plus the HVDC trasmission stuff, the slew rate control, the "Touch Safe" system, exc? (which you refused to address the operation of)


--- Quote ---Yes. It means that it's rated for 300V :) You can try to twist it as you want but truth is at it is.
--- End quote ---

No, you are the one that doesn't understand proper engineering, and blatently ignored the rest of the post. I just said and sourced that you NEVER RUN A CABLE AT IT'S ABSOLUTE MAX VOLTAGE!!! (unless for testing it of course, but not in normal use!)

EDIT: I don't know why i thought of an IOT spoon as an example, but there is an IOT fork.
https://www.hapi.com/product/hapifork
ogden:

--- Quote from: Cyberdragon on February 18, 2018, 12:43:59 am ---I don't use PSPICE, hence I don't remember (yes, I know I should start using it).

--- End quote ---

To understand circuit and waveforms provided, spice knowledge is not required.


--- Quote ---30% less huh? Is this plus the HVDC trasmission stuff, the slew rate control, the "Touch Safe" system, exc? (which you refused to address the operation of)

--- End quote ---

It's hard to follow you here. Please be specific.


--- Quote ---
--- Quote ---Yes. It means that it's rated for 300V :) You can try to twist it as you want but truth is at it is.
--- End quote ---

No, you are the one that doesn't understand proper engineering, and blatently ignored the rest of the post. I just said and sourced that you NEVER RUN A CABLE AT IT'S ABSOLUTE MAX VOLTAGE!!! (unless for testing it of course, but not in normal use!)

--- End quote ---

LOL. 300V rating is 300V rating. No matter how you are trying to twist it around proper engineering excuses :) Don't you think that your arguments are stupid? - I do.
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