1. Transformer Major Overhaul Cycle The main transformer shall undergo a core-lifting inspection before being put into service, and thereafter a core-lifting overhaul shall be performed every 5 to 10 years. Core-lifting overhaul shall also be carried out if a fault occurs during operation or if issues are identified during preventive tests. Distribution transformers operating continuously under normal load conditions may be overhauled once every 10 years. For on-load tap-changing transformers, t
12/09/2025
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Overhaul Items for Transformer Conservator:1. Ordinary-Type Conservator Remove the end covers on both sides of the conservator, clean rust and oil deposits from inner and outer surfaces, then apply insulating varnish to the inner wall and paint to the outer wall; Clean components such as the dirt collector, oil level gauge, and oil plug; Check that the connecting pipe between the explosion-proof device and the conservator is unobstructed; Replace all sealing gaskets to ensure good sealing with n
11/04/2025
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