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Maintenance Frequency for Indoor High-Voltage Functional Unit Draw-out Units

Aug 10, 2026 Leave a message

Standard Maintenance Cycles
Daily Inspections: Once a week; focus on the draw-out unit position indicator, checking for abnormal noises, and verifying that temperature rise on the cabinet surface is within normal limits.
Monthly Inspections:Once a month; verify the live-circuit indicator and the contact status of secondary plugs; inspect the interlocking mechanism for any signs of looseness or deformation.
Quarterly Routine Maintenance: Once every 3 months; lubricate draw-out unit guide rails, clean dust from transmission components, and perform at least three opening/closing operation tests.
Annual In-depth Maintenance: Once a year; fully disassemble and clean contacts, calibrate mechanical characteristics, and conduct main circuit insulation resistance tests and power-frequency withstand voltage tests.

 

Adjustment Rules for Special Operating Conditions
Harsh environments (high humidity, heavy dust, high altitude, etc.): Shorten all cycle intervals by 50%; increase daily inspection frequency to once every two days.
Annual operations exceeding 100 cycles: Upgrade quarterly maintenance to monthly in-depth inspections, with a specific focus on checking contact wear.
Equipment manual specifies requirements:Prioritize adherence to the maintenance cycles prescribed by the manufacturer.

Would you like me to compile a maintenance checklist for these cycles? This would help you implement the tasks step-by-step according to the schedule.

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