Conduction and Contact: The path for current flow, ensuring stable current transmission during high-to-low voltage switching.

Elasticity and Pressure: The contact fingers, through spring mechanisms, generate elasticity, maintaining tight contact with the moving contact to ensure reliable conduction and adapt to minute changes in the contact point.

High Requirements: Extremely high requirements are placed on the conductivity, mechanical strength, and stiffness of the materials to withstand high currents, high voltages, and frequent operation.

Conductive pivot (hollow column type): Provides the main conductive path and structural support.

Base plate: The base connecting the conductive pivot and the contact fingers.

Contact fingers: Multiple pairs, elastically connected to the conductive pivot via pins, etc., forming a contact surface for holding the moving contact.

Spring mechanism: Installed between the contact fingers, providing elasticity and ensuring contact pressure.

Determines Equipment Lifespan: As a core wearing part of high-voltage switches, the wear rate (≤0.1mm/10,000 operations under normal conditions) and arc ablation resistance of stationary contacts are the primary factors limiting the switch's service life. High-voltage switches are required to operate reliably for 20 years or 30,000 cycles; inferior stationary contacts may cause contact failure, overheating, or poor conduction within 5-10 years, leading to premature equipment maintenance or replacement and significantly increasing operational costs.

Ensures Power Grid Safety: The performance of stationary contacts directly dictates the reliable operation of high-voltage switches, which are key control devices in power systems. Unstable contact due to material fatigue, insufficient spring force, or excessive wear can trigger abnormal contact resistance, arc discharge, or even switch malfunction (refusal to operate or incorrect operation). Such failures may result in large-scale power outages, equipment burnout, or other major accidents, especially in UHV power grids, where stationary contact stability is crucial for the continuity of cross-regional power transmission and serves as the cornerstone of energy security.