120kV Composite Surge Arrester

What is the difference between arrester and earthing?

Lightning arrestors form part of the external protection system and operate only when a surge occurs, safely diverting excess voltage to the earthing system. Earthing pits, on the other hand, are continuously active components found in nearly all electrical installations, providing a constant path to ground for safety and operational stability.

Composite-insulated surge arresters are high-voltage surge protection devices made of composite insulating materials [1-2]. They are mainly used in power systems to limit lightning overvoltage and switching overvoltage, protecting electrical equipment from lightning damage. Their core technology includes organic glaze/glass glaze resistor sheet processing and standardized core assembly design, possessing high energy tolerance, excellent aging performance, and cost-effectiveness.

Resistance element technology: The side coating process uses organic glaze or glass glaze. Organic glaze resistance elements balance cost-effectiveness and anti-aging performance, while glass glaze resistance elements significantly improve energy tolerance .

Core assembly electrical performance: The surge arrester core assembly meets the standardization requirements of the State Grid and Southern Power Grid through advanced processes, ensuring stable electrical parameters.

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