Transmission line ,distribution line , transformer substation definition
The transmission line and distribution line called transmission and distribution line .And transformer is the rally point for the transmission and distribution .
In the power system , the transmission line usually mean the high voltage transmission line , according to the structure , can be divide into overhead transmission line and cable line .
The overhead transmission line consists of line tower , conductor ,insulator , line fitting , stay wire , tower base , grounding device and so on , set up above the ground . And the insulator play an important role in the overhead transmission line .
Distribution line mean the voltage under 36 KV
The insulator main use pin insulator and porcelain cross arm insulator , disc suspention insulator and porcelain shackle insulator
3, transformer substation
The equipment for transformer substation main is switch and transformer , also have the lightning rod and lightning arrester , is rally point for the transmission and distrbution .
In transmission line and distribution line ,and substation, all need using insulator to fix the condutor and isolation ,so the insualtor should have good insulating strength .