- 1.1 Three Phase Three Wire AC System
- 1.2 Three Phase Four Wire AC System
- 1.3 Single Phase Two Wire AC System with one Conductor Earthed
- 1.4 Single Phase Two Wire AC System with Midpoint Earthed
- 1.5 Single Phase Three Wire AC System
- 1.6 Two-Phase Three Wire AC System
- 1.7 Two-Phase Four Wire AC System
Alternating Current transmission is widely used and preferred over Direct Current transmission. Depending on our requirement we can use any of the following systems.
This system consists of three wires and this system is most suitable for large factories which need a bulk supply. They get the required supply, directly from the sub-station. The power is also distributed here to various points like other substations and distribution centers.
This system consists of three phases and four wires namely R, Y, B and neutral. This system is suitable for domestic purposes and small industries.
[The remaining are rarely used and also uncommon. They are used only if the requirement arises and that’s too for shorter distances only. I myself never seen the remaining systems live in my entire life.]
Here one terminal from the conductor is earthed. The total voltage is Vm and the root mean square value is Vm/√2 .
Here the mid-point of the conductor is earthed. The total voltage is 2Vm (Vm + Vm). The RMS value is 2Vm/ √2 = √2 Vm
- Which tool are you using for circuit diagrams?
- I am using a draw.io for circuit diagrams.
- Which is preferred more AC or DC?
- Definitely AC Transmission system because for safe, secure and flexible.