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| Has anyone seen this - Voltserver: "Digital Electricity" |
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| Cyberdragon:
I mean that do you still save 30% on costs over traditional systems, even though this requires the extra components stated? No, you CLEARLY do not understand wire ratings at all! Please do some research on wire insulation ratings. The reason you don't constantly run wire at it's max voltage is because it can stress the insulation and may cause it to fail after awhile! :palm: Plus, no electrical codes (at least in the US) will allow you to do this anyway, even if you wanted to tempt fate! Note: the EMI crosstalk should not apply (as I assume the HV is the only thing on the cable in this system). https://community.spiceworks.com/topic/395007-ethernet-cat-6-cable-and-electrical-power-cable --- Quote ---The building code issue is likely due to the fact that CAT6 is not made for high voltage transmission --- End quote --- |
| m98:
How about them not using some standard cat6 ethernet cable off Aliexpress, but actually something tailored to the specs they need? Or maybe there is some manufacturer who already offers something suitable off the shelf. How's touch protection gonna work? Probably something like this: Server: I just sent 1 J of Energy. Client 1: received 0.3 J. Client 2: received 0.3 J. Client 3: received 0.1 J. Server: Stops transmitting, indicates fault condition. |
| StillTrying:
--- Quote from: dunkemhigh on February 17, 2018, 11:47:48 pm --- --- 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. --- End quote --- All the sender can do is switch back on (or not) the unregulated 336VDC, which is connected to all devices, the 336VDC is not addressable packets of power as described in some of the texts. --- Quote ---Surely that's just the same as many mains fault detection works. --- End quote --- You must be kidding! http://electrical-engineering-portal.com/how-residual-current-device-rcd-works --- Quote ---For crying out loud - there is NO REACTION TIME involved. The next pulse is ONLY sent if the previous one was safe. --- End quote --- They say they 'test' the cable during the data period when the 336VDC is switched off to determine if it's safe or not. Some of us might not completely believe them, with a lot of devices connected to the cable it would be near impossible to detect the small extra load caused by a finger. |
| PlainName:
--- Quote ---How about them not using some standard cat6 ethernet cable off Aliexpress, but actually something tailored to the specs they need? --- End quote --- Are you crazy? :wtf: That would kill off at least one straw man. :scared: |
| PlainName:
--- Quote ---All the sender can do is switch back on (or not) the unregulated 336VDC, --- End quote --- Yes, indeed. Someone appears to be awake :) --- Quote ---which is connected to all devices --- End quote --- Yeah? Sure? I assumed it was point-to-point. Many devices, but each on its own wire (aka link). At the risk of confusing the issue, you might have a remote unit that is in fact a multiway socket, like a normal extension lead has. But that would be the remote device, not each thing that's plugged in. Still a single wire/link. --- Quote ---the 336VDC is not addressable packets of power as described in some of the texts --- End quote --- Can you quote some of that text, please? I'd like to know exactly what we're talking about, here. --- Quote ---You must be kidding! --- End quote --- Essentially, they determine the difference between what went out on the live leg and what's coming back on the neutral leg. About 30mA difference and it trips. Same king of thing here but obviously measured differently - the sender knows what went out, the remote tells it what was used, any difference and there's a problem. Same kind of principle, is it not? --- Quote ---They say they 'test' the cable during the data period when the 336VDC is switched off to determine if it's safe or not. --- End quote --- Fine. I offered an opinion and acknowledged from the off that I didn't know. But now you have it from the horses mouth. [Thinks...] Hey, why don't you ask them? I guess that might spoil the scope for argument on here, but if you actually want to know it's a simple and hard to beat thing to do. --- Quote ---the small extra load caused by a finger --- End quote --- Wouldn't that depend on what the finger is attached to, electrically? |
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