In electricity, the phase is used to represent the distribution of load of the whole line, and a three-phase power has three wire AC power circuit plus one neutral wire. Each phase or wire AC signal has 120o electrical differences in between every phase or wire.
An online UPS using the three-phase power supply supplies power through the load to the device by taking the incoming AC mains supply and converts it to DC which feeds the battery.
A three-phase power supply system uses three conductors which helps in carrying alternating current having the same frequency and voltage amplitude but with one-third cycle between ever phase as a phase difference.
Due to the phase difference in every cycle, the voltage on the conductors reaches its peak at one-third of a cycle after one of the conductors and one-third of the cycle before the remaining conductors.
This delay helps in giving constant power to a balanced and linear load. It also makes it possible to produce a rotating magnetic field in electric motor and generate another arrangement of phases with the help of transformers. The amplitude of the voltage difference between two phases is √3 (1.732) times the amplitude of the voltage of individual phases.
A three-phase system that feeds a balanced and linear load or current has Zero as the sum of instantaneous currents of the three conductors present. This is because here the current in each conductor is equal in magnitude to the sum of the other two conductors.
Advantages of a Three-Phase Power Supply in Online UPS are here as follows:
- A three-phase UPS can deliver more electrical power because it uses the full three-phase generated from the grid.
- Three-phase online UPS uses three separate conductors providing three sine waves which provide the continuous power to the main load.
- A three-phase power supply uses less conductor material to transmit a set amount of electrical power than any other power supply.
- A three-phase online UPS is the standard choice for larger installations like data centers, industrial sectors, medical environment, business sector, etc.
A three-phase online UPS has a more complex infrastructure and compilation which helps in producing consistency and the same magnitudes, neither inferior nor superior.