Contact Spacing Requirements For High-voltage Disconnect Switches Under Maintenance Conditions

As a device specifically designed for isolation and switching operations in power systems, the contacts of the High Voltage Disconnect Switch are typically exposed to air, exhibiting a clear disconnection indicator in the "open" position. This contact distance is directly relevant to the maintenance of distribution lines or high-voltage equipment; it is not merely a result of mechanical action, but a necessary condition reflecting the equipment design and system operating logic. For high-voltage installations, this distance must meet the insulation levels specified in electrical equipment standards to prevent any possible corona or partial discharge phenomena.