Case study on maintenance of glass tempering furnace Schneider inverter
Customer: Shenzhen a glass products Co., Ltd.
Name: Schneider frequency converter
Model: ATV61-75KW
Fault reason: power up trip
Fault analysis: customers say electricity on the trip in the boot, the general switch factory the trip, according to the fault that frequency converter has lead to short-circuit phenomenon, the static measurement module to U phase short circuit, rectifier R, S on the cathode in the short circuit, remove the shell measurement on the driver board and power board repair, replace the power switch. Tube and IC, the power of the driver board repair U driver optocoupler and IC replacement after the measurement of normal electrical measurement of normal driving voltage. Measurement of the driving waveform with an oscilloscope is normal. Loaded on the new module and rectifier SCR module on the power output without load test. With load motor test voltage all the normal current.
Jia hung Wai professional Schneider inverter maintenance phase, over current, over voltage, under voltage, overheating, overload, encoder fault, parameter errors, there is no output display, module damage, etc..