
What are the primary components of an overhead distribution line, and what is the function of each?
2025-08-13An overhead distribution line is a sophisticated network designed to deliver electricity safely and efficiently to end-users. The system is composed of several critical components:
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Poles and Supports: These are the structures, typically made of wood, concrete, or steel, that hold the conductors and other equipment at a safe height above the ground.
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Conductors: These are the wires, often made of aluminum or aluminum-steel composite (ACSR), that carry the electrical current from the substation to homes and businesses.
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Insulators: These devices, made from porcelain, glass, or polymers, electrically isolate the live conductors from the supporting poles and cross-arms, preventing current from leaking to the ground.
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Cross-Arms: These are the horizontal members attached to the top of the poles that hold the insulators and support the conductors.
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Transformers: These are typically pole-mounted and reduce the high voltage of the distribution line to the lower voltage required for residential or commercial use.
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