After dedusting of circuit board and bus bar, necessary anticorrosion treatment is carried out, insulating paint is painted, and burr must be removed after partial discharge and arc pulling are used. The damaged part of the insulating board which has been insulated and broken shall be removed, the i

Open the front door of the converter, open the back door, carefully check whether the AC or DC bus row is deformed, corroded and oxidized, whether the screw at the bus joint is loose or not, and whether the solid screw at the fixing point is loosened. Fixed insulation or insulation column with or wi

Dedusting frequency converter regularly, the emphasis is rectifier cabinet, inverter cabinet and control cabinet, if necessary, the rectifier module, inverter module and control cabinet can be removed from the circuit board after dust removal. Frequency converter down air inlet, upper air outlet whe

Regular dust removal check fan inlet is blocked. Monthly cleaning air filter cooling duct and internal dust.Regular inspection, should be carried out once a year: check screws, bolts and that is, plug-in, etc., whether the input-output reactor ground and phase resistance short-circuit phenomenon, no