Posted: 6/3/2007 6:09:19 AM EDT
| I need to know what the difference between single phase. and three phase. Thanks to all that answer much appreciated!!!! |
|
Single Phase Three Phase Single Phase will have 1 transformer on the pole feeding the building. 3 Phase will have 3 transformers. |
The main difference for the average Joe is that you can buy three phase shop equipment for a lot less than single phase. Too bad you wont be able to use that equipment unless you buy a converter to go with it. Which brings the cost back up to the single phase market prices.
|
I do have a set of plans around here for a three phase converter. Pretty simple setup, using a three phase motor spun up by a single phase, etc. Concept seems correct, but I have yet to try it myself. |
|
|
You need to balance the voltages with capacitors to make a rotary phase converter work really well. As was previously noted, you almost certainly don't have three-phase power in a residence, nor can you get it installed. Three-phase power is pretty much exclusively commercial or industrial. |
And efficiency. |
NO!!!!! single phase has one winding three phase has 3.. diffrent animals... |
As a former electrician I can say. 1) Single phase will kill you. 2) Three phase will kill you, faster. The general rule is: "The higher the voltage, the lower the (used) amperage" for the same amount of work. i.e.: a 4 lamp 120v fluorescent light fixture may uses about 2 amps, the same fixture in 277v (still single phase) uses about .5 amps. Voltages that are considered "High" are 3-phase as a general rule, "110/208 3p", "277/480 3p" are the standards in commercial work, residential is "120/240 1p". The lines outside your house are typically 7400vac (on the wooden poles) the higher the poles are, the higher the voltages are typically. When they say don't screw around with the metal towers on "power lines" they really mean it. |