Optical Ground
wire ( OPGW ) is an optical fiber composite overhead ground wire which is used
in overhead power lines. Its function is to grounding and communication.
- It consists of tubular structure with one or more optical fiber in it which is surrounded by aluminum and steel wire.
- The optical fiber itself is an insulator and protects the transmission line and lightning induction, cross talk during communication and external electrical noise.
- The OPGW contains optical fibers have low transmission line loss and allows high speed transmission over long distances.
- The outer side appearance of the OPGW is similar to ACSR conductors.
- The OPGW is run at the top of the transmission line tower or say Electricity Pylons. ( The transmission line tall steel tower which is used to support transmission line conductor is called as Electricity pylon in the UK , Canada and other Europe countries. )
- The conducting part of the cable serves as bond adjacent towers to earth ground and protects the high voltage conductors from lightning strokes.
- The OPGW shall be made up of optical fiber in one or more protective fiber units combined with concentric stranded metallic wire in single / multiple layers.
Function of the OPGW
- To replace conventional ground wire
- To protect transmission line from lightning
- To serve as conductive medium for carrying fault currents to ground
- To provide voice and data communication through optical fibers
You may also
like :
No comments:
Post a Comment