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Power transmission lines,distribution lines

Power transmission lines, distribution lines are divided into overhead AC, underground AC, overhead DC and ground DC and composed of shield conductor, insulator, phase conductor and tower.

Power transmission lines,distribution lines

Distribution line structure
◆ Shield conductor
◆ Steel tower or wooden tower
◆ Composite insulator, porcelain insulator
◆ Crossarm
◆ Two conductor bundle

Power transmission lines,distribution lines

Power transmission lines structure
◆ Shield conductor
◆ Steel tower
◆ Composite insulator, porcelain insulator
◆ Phase conductor

Some distribution lines installed transformers including insulators, surge arrester, fuse cutout and transformer below 36kv.

How to use power transmission lines?
Conductors and insulators are main parts of electrical power transmission lines and distribution lines. The types of transmission lines have aluminum conductor steel reinforced (ACSR), all aluminum conductor (AAC) and all aluminum alloy conductor (AAAC).

Bundled conductors in transmission lines advantages: reduced corona loss due to larger cross-sectional area; reduced interference with telecommunications systems; improved voltage regulation.

Insulators used for overhead power transmission lines and distribution lines are: pin type, suspension type; strain; and shackle etc.

Power structures for Power transmission lines, distribution lines
Wooden poles; tubular poles; RCC poles (above 33kv); latticed steel towers (above 66kv) where double circuit transmission lines can be set on the same tower.

 

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