In general, the capacitance doesn't make a loud noise when it's running, a bit like the buzzing sound of a bee's cauliflower. However, there are still some anomalies, mainly:(1) The discharge sound caused by the loosening of the connection between the capacitor busbar and the conductive bar; (2) Dis

The temperature of the capacitor and the temperature of the shell is limited, but there are some reasons why the temperature of the capacitor is too high:(1) Because of the unreasonable design of the capacitor chamber, the ambient temperature of the capacitor chamber is too high; (2) The density of

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

Other breakdown1, undervoltageDescription of the inverter power input part of the problem, to be checked before they can run.2, the temperature is too highSuch as motor temperature detection device, check the motor cooling; inverter temperature is too high, check the inverter ventilation.

Overload faultOverload faults include inverter overload and motor overload. It may be due to acceleration time is too short, excessive DC braking, power grid voltage is too low, overloaded and other causes. Generally by extending the acceleration time, extended braking time, check the grid voltage.

Overcurrent faultOvercurrent fault can be divided into acceleration, deceleration, constant speed over current. It may be due to the inverter acceleration and deceleration time is too short, the load changes suddenly, the load distribution is uneven, the output short circuit and other causes. At thi

Overvoltage faultThe over-voltage of the inverter is concentrated on the DC voltage of the DC bus. Under normal circumstances, the inverter DC three-phase full-wave rectified average. If 380V line voltage calculation, the average DC voltage Ud = 1.35 U line = 513V. When an overvoltage occurs, the st