U70B/146
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Suspension porcelain insulators are key components used in high-voltage transmission lines to suspend conductors and maintain insulation. Their core features and applications are as follows:
Core Features
Structural Composition: Assembled from a ceramic body and metal parts such as iron caps and steel pins using adhesives, combining mechanical strength and insulation performance.
Electrical and Mechanical Performance: Must withstand mechanical stresses such as conductor tension, wind force, and temperature changes, while isolating high-voltage electric fields to ensure current does not flow back to ground.
Umbrella Design: Often uses an umbrella-shaped structure to enhance pollution flashover resistance; rainwater can wash away surface dirt, improving pollution resistance.
Series Use: The quantity is adjusted according to voltage level. For example, in AC systems, disc-type suspension porcelain insulators (such as model U70BL) are differentiated by parameters like electromechanical failure load (70kN).
Application Scenarios
High-Voltage Transmission Lines: Support conductors and maintain insulation from towers, ensuring safe power transmission.
Harsh Environments: Adapt to transient loads such as strong winds, icing, and earthquakes to ensure stable line operation.
Special Requirements: Specific models (such as double-layer umbrella pollution-resistant types) are selected for scenarios like ultra-high voltage transmission and polluted areas.
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