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Results tagged with single-phase
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user 95888
AC power with two legs run 180 degrees out of phase
1
vote
How to get 220 VAC from 2-phase 110 VAC
Not going to happen. The unit requires too much power to be able to power from a common 120V outlet. Even with a step-up transformer, you will have circuit breaker trips at inopportune times, causin …
2
votes
How to convert output from a split phase inverter to single phase with only 1 hot?
Philippine power (in the American zones) is a worldwide one-off: it is simply North American style power, but with neutral omitted. Safety ground is still there, but it's halfway between the hots. …
1
vote
Wire size & current capacity
It's thermal.
The limiting factor in conduit isn't the surface area of the wires (which goes up as the square root of cross section) but rather, the surface area of the conduit. So more wires in co …
4
votes
Why is the three-phase voltage 440V, if single-phase alone is 230V?
It's weirder than that. If you have 220V, your 3-phase is actually only 381V because triangles.
They have nothing to do with each other
The "220V" standard is a completely different electrical system …
35
votes
Why is North American residential power called single phase?
Because it is a single phase, with a center tap.
That's all it is. There's nothing more exciting than that. It is a 240V transformer secondary with 3 taps at 120V spacing.
Most installations have a …
2
votes
Accepted
How are the individual homes connected in a 3 phase power distribution system (power grid) s...
> residential
> 3-phase, 2 phases to each house
> 208V between phases
You are either in New York City or certain countries in Central America which do that. Brazil does something similar but at 1 …
0
votes
Two-phase system for a smart house?
It's not two-phase
A two-phase power system has two phases 90 degrees out of phase. This can't be done with less than four wires. That's a lot of wires for not a lot of power transmission. Needless …
1
vote
Can I rewire a 240 V 3 phase steamer to a 240 V 1-2 phase?
Yeah, it looks reasonable. It was originally wired for 240V 3-phase "delta", with 2 separate banks of contactors hooking up heaters 123 or 456, and all that fed through the 3-channel overheat protec …
0
votes
Phase and voltage conversion
Stop. Provisioning time.
The first thing you have to do is provision the power. Conversion isn't going to matter until you've done that.
A SuperCharger V1 draws 150 kilowatts (kW). Since you're deali …
3
votes
Does the dropper between the catenary wire and contact wire carry current?
Trolley line maintainer here.
Yes.
Because, trying to insulate the catenary wire from the contact wire would be sheer madness. It's much easier to simply insulate the whole catenary-dropper-contact a …
3
votes
Difference in wire gauge for three phase and single phase domestic power supplies
Because 3-phase cancels out neutral losses!
If you calculate load single-phase, for instance 12 KVA is simply 240V @ 50A. Very straightforward stuff. You pay for voltage drop going out on the live w …