Not necessarily, in the UK in the 1950s and 60s there were single-phase 480 V supplies with a neutral centre-tap giving two 240 V supplies with opposite phase. It is still used in rural areas, a three-wire single-phase supply, but individual properties do not normally have a 480 V supply.
Normally the supply is used for small groups of houses where half the houses are put on one side of the supply and the others on the other half. When both groups of houses use the same amount of current, there is no current returning in the neutral wire, which gives lower distribution losses.
To connect 480vac 3 phase to 230vac single phase, you need a step down transformer, 480 to 230, connected to one phase.
The ratio for a 480 VAC to 120 VAC is 4 to 1.
single phase, double phase & three phase
The difference between a single phase and a three phase motor is the amount of power conductors that feed the device. As to the other part of the question a three phase motor will not start or run on single phase. The phase angles on three phase are 120 degrees apart on a single phase system they are 180 degrees apart.
A two-phase system is archaic and you are unlikely to find it in use anywhere these days, so it is mainly of historical interest. A two-phase, three-wire system, consists of two phase voltages, displaced from each other by 90 electrical degrees, and a phase voltage which is 1.414 x phase voltage.A three-phase system consists of three phase voltages which are displaced from each other by 120 electrical degrees. In the case of a three-phase, three-wire, system, the line voltages are numerically equal to the phase voltages; in the case of a three-phase, four-wire, system, the line voltages are 1.732 x phase voltage.
Yes, there a difference between three phase and single phase electrical supply services.
The ratio for a 480 VAC to 120 VAC is 4 to 1.
single phase, double phase & three phase
There is no such thing as a two phase instrument. There is only single phase and three phase. You can only have: single phase/ one pole single phase/ two pole three phase/ three pole
Yes, there is a difference between single phase and three phase circuits.
Three phase is ac
You don't. A three phase motor will not start unless it is connected to a three phase supply.
To use a single/one phase motor instead of a three phase motor is possible if you have a three phase power supply as you will only need to tap one of the three phases together with neutral and an earthwire, however to use a three phase motor instead of a single phase will require the provision of three phase power supply.
In three phase: I = (three phase VA) / (sqrt(3) x (phase to phase voltage)) for single phase: I = (single phase VA) / ((phase to neutral voltage)) keep in mine three phase VA = 3 x (single phase VA), and phase to phase voltage = 1.732 x (phase to neutral voltage) Therefore the single phase and three phase currents are the same (ie, the three phase currents are the same in all three phases, or balanced). But don't get available current and available power confused (KVA is not the same as KW).
It must be a three phase supply service to run a three phase motor.
Three phase or two phase? Three phase requires three large wires for the current needed
Any where that a three phase supply distribution is needed to operate three phase equipment.
The difference between a single phase and a three phase motor is the amount of power conductors that feed the device. As to the other part of the question a three phase motor will not start or run on single phase. The phase angles on three phase are 120 degrees apart on a single phase system they are 180 degrees apart.