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Lightning rod 220 kV
Power plant type: suitable for protecting the incoming line of 220kV substation and the high voltage side of the transformer;
Line Type: Suspended structure, built-in disconnector function, used to protect power lines from lightning surge, reducing lightning trigger speed
Description
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Product Details
Surge limiter 220kV Surge limiter
Type classification:
Power plant type: suitable for protecting the incoming line of 220kV substation and the high voltage side of the transformer;
Line Type: Suspended structure, built-in disconnector function, used to protect power lines from lightning surge, reducing lightning trigger speed
Main components: mainly composed of zinc oxide valve plates, with significant non-linear current-voltage characteristics, response time ≤ 25ns, and current capacity ≥ 40kA;
Shell material: Silicone rubber composite material, the weight of the composite type is reduced by 30% compared with traditional ceramics, the weather resistance covers -40℃~+85℃, and the protection level is IP65
Some models are equipped with voltage equalization rings to balance the electrical field distribution and prevent partial discharge;
Auxiliary design: Built-in pressure relief port or relief device, quickly cut off the continuous power frequency current in case of fault
Main functions:
Lightning surge protection at the incoming end of 220 kV substations, high-voltage and low-voltage sides of transformers and power lines, limiting the amplitude of the overvoltage to a level below that acceptable for the equipment;
Disabling continuous power frequency current reduces equipment damage and maintenance costs caused by lightning strikes.
Adaptation environment:
Composite shell type is used in coastal areas with salt spray and industrial pollution, combined with pressure equalization rings to improve stability;
Priority should be given to fully sealed zinc oxide lightning rods in high mountain areas to avoid seal failure due to pressure changes.
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