The application of BB inverter is very wide, and everyone has more opportunities to come into contact with it in daily life. However, none of us are professionals, and of course we don’t know much about maintenance and protection. Let's listen to the experts from Wuxi Jincheng Electric introduce to you about the maintenance and upkeep of BB inverters. . Heidiying Consulting-
Manager Gao,
Consultation 3
The daily inspection items of BB inverter include:
Before powering on the BB inverter, the temperature of the surrounding environment and Humidity and high temperature will cause the inverter to overheat and alarm. In severe cases, it will directly cause damage to the inverter's power components and short circuits. Too humid air will cause a direct short circuit inside the inverter. When the BB inverter is running, pay attention to whether the cooling system is working properly, such as whether the air duct exhaust is smooth and whether the fan makes abnormal sounds.
Jincheng Electric bb inverter maintenance engineer tells you: Generally, inverters with relatively high protection levels, such as the above inverters, can be installed directly in the open, while the following inverters should generally be installed in cabinets.
The cooling effect of the frequency converter cabinet will directly affect the normal operation of the frequency converter. Whether the exhaust system of the frequency converter, such as whether the fan rotates smoothly, and whether there is dust and obstructions in the air inlet, are areas that cannot be ignored in our daily inspections.
Regular maintenance of BB inverter should also include:
Cleaning the air filter cooling duct and internal dust is a very important maintenance method. Check whether the screws, bolts and plug-ins are loose, and whether there is a short circuit in the ground and phase resistance of the input and output reactor. Normally it should be greater than tens of megohms. Check whether the conductor and insulator are corroded. If so, wipe them clean with alcohol in time.
. When conditions permit, use an oscilloscope to measure the stability of the voltage of each circuit of the switching power supply, measure whether there is distortion in the waveform of each circuit of the driver circuit, whether the phase-to-phase waveform is a sine wave, and whether the contacts of the contactor are Are there any signs of ignition?
In serious cases, it is necessary to replace the product with a new one of the same model or larger than the original capacity to confirm the correctness of the control voltage, conduct a sequential protection action test to confirm that there is no abnormality in the protection display circuit, and confirm the balance of the output voltage of the inverter when running alone.
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Precautions for daily inspection and regular maintenance of ABB inverters