Electrical Engineering ⇒ Topic : Balanced 3-phase system

Balanced 3-phase system. A balanced 3-phase system is one which meets the following requirements

• It should have balanced 3-phase supply.
• It should have balanced 3-phase or single phase loads on the balanced 3-phase supply.
• It should have equal active power and equal reactive power flow in each phase.

Note. The great majority of problems facing the electric supply companies are to ensure balanced 3-phase system. Fortunately, most of the industrial loads are 3-phase loads (i.e. 3-phase motors) that are inherently balanced. However, problems arise while suppling single-phase loads from 3-phase supply. Here, definite efforts are made to keep the 3-phase system balanced by putting approximately equal single-phase loads on each of the three phases