Before Replacing A High-voltage Disconnect Switch, Ensure That All Materials And Processed Parts Are In Place Before Starting Work.

Before replacing the hv isolator, all prepared materials and processed parts must be inventoried and verified. This includes the required new hv isolator switch body, connectors, insulating supports, fasteners, contact assemblies, and auxiliary insulation and mechanical support structures. Processed parts must meet construction requirements: undamaged, undeformed, and dimensionally conforming to the drawings.

At the construction site, all material lists must match the actual quantity. The comparison record must cover details such as component model, specifications, batch, and processing quality. For custom-made parts, material certificates and qualification reports are required. If necessary, a visual and dimensional re-inspection of critical components should be conducted.

Before commencing work, construction personnel should confirm that all components are intact, stored properly, and clearly labeled. Construction drawings, assembly drawings, and electrical drawings should be placed on-site for easy comparison with the actual components. If any missing, incorrect, or processing defects are found, the process should be immediately paused, and the materials department should be notified to replenish the missing parts.