Three-phase electric power is a common method of electric power transmission. It is a type of polyphase system mainly used to power motors and many other devices. A three-phase system uses less conductor material to transmit electric power than equivalent single-phase, two-phase, or direct-current systems at the same voltage.
Typical applications for three phase systems include data centres, mobile towers, power grids, shipboard and aircraft, unmanned systems, and any other electronic with a load greater than 1000 watts. Three phase power supplies offer a superior carrying capacity for higher load systems. Some of the benefits include:
A Single phase AC power system peaks in voltage at 90⁰ and 270⁰, with a complete cycle at 360⁰ (see chart below.) With these peaks and dips in voltage, power is not delivered at a constant rate. In a single phase system, there is one neutral wire and one power wire with current flowing between them. The cyclical changes in magnitude and direction usually change flow in current and voltage about 60 times per second, depending on the particular needs of a system.
Single phase power supply units have a broad array of applications. Units that have a limited power need up to 1000 watts* typically make the most efficient use of a single phase AC power supply. Generally, benefits of selecting a single phase system include: