Three Phase Circuits In Electrical Engineering. Advantages of 3 phase power system over 1 phase system can be summarized as below. The total load is 3 100w 300w.
Video lecture on need of three phase supply of chapter three phase circuits of subject basic electrical engineering for first year engineering students. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. Consider three single phase systems each supplying 100w to a load figure 3.
It is also used to power large motors and other heavy loads.
To supply the power 1 amp flows through 6 wires and there are thus 6 units of loss. There are two major advantages of three phase power systems over a single phase system i e. Motor input p motor output motor efficiency 500 0 9 555 55 kw. A three wire three phase circuit is usually more economical than an equivalent two wire single phase circuit at the same line to ground voltage because it uses less conductor material to transmi.
