Today, I will tell you how to choose a good capacitor
and what you should pay attention to when using the capacitor. How to choose a good quality capacitor? All self-healing low-voltage shunt power capacitors that pass the test should meet the national GB12747-91 standard, and the capacitor components must be inspected and screened before leaving the factory, and then only qualified components are allowed to be assembled. The main indicators of the entire capacitor, such as capacity, loss, withstand voltage and insulation, have been tested, and only allowed to leave the factory after the appearance has passed the inspection. The capacitors shipped from the factory should also have supporting instructions and technical indicators. The manufacturer shall replace the capacitor in case of breakdown, overheating, obvious bulging, failure, etc. during the warranty period. What I said before is basically satisfied. After the customer chooses the capacitor, he still wants to use it. Then, how to use it is correct? General users often ignore the instruction manual, and the precautions for use must be carefully understood and followed during installation. As we all know, the impedance of a capacitor is inversely proportional to frequency. As the frequency increases, the loss also increases. Measures should be taken to limit the harmonics and inrush current in the circuit. Capacitors always generate heat, so special attention should be paid to ventilation and cooling. After the reactive power compensation device is installed, during the trial operation, the system should be tested, and measures should be taken in time if overvoltage, overcurrent, oscillation, harmonics, etc. are found, which is very necessary for the normal operation of the capacitor. Do you understand how to choose a good capacitor and what to pay attention to when using the capacitor?
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