What are the main elements of transmission line

What are the main elements of transmission line

The principal elements of a high-voltage transmission line are :

1. Conductors, usually three for a single-circuit line and six for a double-circuit line. Theusual material is aluminium reinforced with steel. 

1. Step-up and step-down transformers, at the sending and receiving ends respectively. The use of transformers permits power to be transmitted at high efficiency.

1. Line insulators, which mechanically support the line conductors and isolate them electrically from the ground

1.  Support, which are generally steel towers and provide support to the conductors.

1. Protective devices, such as ground wires, lightning arrestors, circuit breakers, relays etc, they ensure the satisfactory service of the transmission line.

1. Voltage regulating devices, which maintain the voltage at the receiving end within permissible limits.