ABB frequency converters are widely used, and there are many opportunities for people to contact. However, we are not professionals, and of course we do not know how to maintain and protect. Below we will listen to the experts to tell you about ABB inverter maintenance and maintenance.
ABB inverter daily inspection items include:
1. Before the inverter is powered on, the temperature and humidity of the surrounding environment should be detected first. If the temperature is too high, the inverter will overheat the alarm. In severe cases, the inverter power device will be damaged and the circuit will be short-circuited.
2. If the air is too humid, it will cause a direct short circuit inside the inverter. When the inverter is running, pay attention to whether its cooling system is in normal production, such as whether the air duct is smooth or not, and whether the fan has abnormal sound.
3, abb inverter maintenance engineer tells you that the general protection level of the higher frequency converter such as: IP20 or higher inverter can be directly open installation, IP20 below the inverter should generally be cabinet installation.
4. How the heat dissipation effect of the inverter cabinet will directly affect the normal operation of the inverter. Whether the exhaust system of the inverter is smooth, such as whether the fan rotates smoothly, whether the air inlet has dust or obstruction is a place that we can not neglect in daily inspection.
The aspects of regular maintenance of ABB drives should also include:
1. Cleaning the air filter to cool the air duct and internal dust is an important maintenance method. Check whether the screws, bolts, and plug-ins are loose. Is there any short-circuit between the ground and the phase-to-phase resistance of the input/output reactor? Normally, it should be greater than several tens of mega-ohms. If the conductor and the insulator are corroded, if necessary, wipe it with alcohol. .
2. When conditions permit, use an oscilloscope to measure the smoothness of the voltage output of each circuit of the switching power supply. Measure whether the waveform of each circuit of the driver circuit is distorted, whether the waveform of the UVW phase is a sine wave, and whether the contact of the contactor has Fire marks.
3. Seriously replace the new product with the same model or larger than the original capacity; confirm the correctness of the control voltage, perform the sequence protection action test; confirm that there is no abnormality in the protection display circuit; confirm the balance of the output voltage when the inverter is running alone.
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