adaptor so a 220V Brewzilla gen 4 can plug into 110V wall socket.

[day_trippr]

Probably, yes

 

[beren]

https://en.m.wikipedia.org/wiki/Split-phase_electric_power

Single phase, split.


“Since the two phasors do not define a unique direction of rotation for a revolving magnetic field, a split single-phase is not a two-phase system.”

 

[Broken Crow]

Correct about the center tapped transformer to get two different phases of 120V, but I'm pretty sure the local transmission distribution lines are running at significantly higher that 240V to minimized IR losses in the wires.

Edit: Thought I should verify:

View attachment 876045

Brew on

Sorry... I don't remember actual transformer capacites and winds but where we had to grow up with simplistic crappy NTSC as opposed to the proper colours of PAL or SECAM, we had to go and have an overly complicated power distrubution network as some sort of compensation for over-eager engineers.....though honestly if given the choice I'd prefer our pair of out of phase 120V's just for the options it affords even it does mean having to use both L14 and L6 plugs and receptacles to operate my kettle and pumps at different voltages...maybe that's just me.
...oh: and I"ve always been greatful for 60Hz as oppsed to 50Hz being around when television made it's appearence..I'm one of those who can see the flicker on high-contrast scenes in PAL or in the 24fps movie theatres...just sayin...always been a fan of Doug Trumbull and his Showscan.

 

[Broken Crow]

I'll believe what I see on an oscilloscope display, rather than some arbitrary definition that goes against reality. I agree that if you add the two together you get single phase 240V.

Brew on

Yes to @mac_1103 and this.. I've watched the slightly varying over time but roughly 60Hz 120V upper plus 120V lower (zero-line crossing) that my split feed service panel gets on my oscilloscope.
The terminology does make for arguments that only need be pursued for the purpose of splitting hairs on this site or in the event of imported circuit boards with the kind of poorly planned power supplies that were even an exception before the 'global' manufacturing era whose rectifiers barfed when confronted with an unexpected phase or over-voltage.

 

[Bobby_M]

Pedantic thread drift alert.

It's usually my fault, takes one to know one, but.

 

[whoaru99]

I haven't posted for a while so it seems only right I pile on.

I'll believe what I see on an oscilloscope display, rather than some arbitrary definition that goes against reality. I agree that if you add the two together you get single phase 240V.

Brew on

Yes to @mac_1103 and this.. I've watched the slightly varying over time but roughly 60Hz 120V upper plus 120V lower (zero-line crossing) that my split feed service panel gets on my oscilloscope.

The observations made certainly are relevant to the connections made, but are non sequitur to the point of deriving 240V in this split phase power system.

Referencing the scope measurements from center tap/neutral to either end/leg/phase gives a false impression of the way it works because the center tap/neutral has no forbearance at all on getting 240V from the system.

 

[doug293cz]

I haven't posted for a while so it seems only right I pile on.





The observations made certainly are relevant to the connections made, but are non sequitur to the point of deriving 240V in this split phase power system.

Referencing the scope measurements from center tap/neutral to either end/leg/phase gives a false impression of the way it works because the center tap/neutral has no forbearance at all on getting 240V from the system.

No one has questioned 240V being single phase. The discussion was about the two different phases of the derived 120V that are 180° out of phase.

Brew on

 

[whoaru99]

... The discussion was about the two different phases of the derived 120V that are 180° out of phase.

Brew on

It seemed to me that was being used to support where 240V came from, i.e. two 120V 180-deg out summing together.

From a post a bit earlier in the thread -

Fine! I'll split hairs: This western continent actually runs on 120V x 2 phases which are summed for 240V. (unlike the UK single phase 220V)

 

[DavidWood2115]

Each phase peaks at 120V, contrasted to the UK where the single phase (1-hot, 1-neutral) peaks at 220V.

Actually, each US 120v phase peaks at ~170V. The 120V that is widely quoted is the RMS (root mean squared) voltage across the waveform. Similarly, the peak-to-peak voltage on a 240V circuit is ~340V.

RMS AC voltage is used as it represents an approximate equivalence with DC voltage.

 

[mac_1103]

Ladies and gentlemen of the jury, I’m just a caveman. I fell on some ice and later got thawed out by some of your scientists. Your "electricity" frightens and confuses me! Sometimes when I turn on a light, I wonder: “Did little demons get inside and build a fire?” I don’t know! My primitive mind can’t grasp these concepts. But there is one thing I do know – when a man like my client has his Brewzilla fried because he used this "adapter", then he is entitled to no less than two million in compensatory damages, and two million in punitive damages. Thank you.

 

[Broken Crow]

It seemed to me that was being used to support where 240V came from, i.e. two 120V 180-deg out summing together.

From a post a bit earlier in the thread -

Yup...I really am clumsy in my wording these days and shouldn't post when drinking! Glad you could join the pedantry!
..If I'd had one more drink I probably would've instead said that the majority of the conitinent runs on 5V-24V DC, since most homes only use a full 120VAC or 240VAC for electric motors and heating elements and even LED lightbulbs have a rectifier built into the base.
It was @Cheshire Cat 's post that compelled me to respond as many of us colonials suffer longer than civilized wait times for an electric tea-kettle to boil owing to our half-phase 120V power outlets.