High-voltage Disconnect Switches Should Be Kept Horizontal When Installed Outdoors.

When installing a High Voltage Disconnect Switch in an open-air electrical facility, it is recommended to maintain its supporting insulator in a strictly horizontal position. High-voltage disconnect switches are typically designed with supporting insulators featuring porcelain skirts. Their rain and dust protection depends on the alignment and stable support between the insulator and the skirt. Only by keeping it horizontal can the skirt rest properly on the insulator, fully utilizing its shielding function and preventing rainwater from entering the internal structure through the insulator.

Installation at an angle will compromise the seal between the skirt and the supporting insulator. If the insulator is not horizontal, its sealing and waterproofing performance will be significantly reduced, allowing moisture or dust to seep into the switch. This seepage can gradually damage the insulation performance due to humidity and temperature changes, affecting the contact quality between contacts and conductors, causing changes in contact resistance, and potentially even leading to overheating faults or partial breakdowns.