A product needs to choose excellent raw materials when purchasing raw materials, choose advanced technology, and carefully check when leaving the factory, so as to ensure that the products sold are no problem. The same is true for film capacitor
s. All the film capacitors shipped out of the factory should meet the industry's GB12747-91 standard, and the capacitor components must be inspected and screened before they leave the factory, and then only qualified components are allowed to be assembled into capacitors. The main indicators of film capacitors, such as capacity, loss, withstand voltage, insulation, etc., have been tested, and the appearance must be inspected before they can be shipped. The factory-made film capacitors should be equipped with corresponding instruction manuals, technical indicators, specifications, etc. If film capacitors experience breakdown, overheating, obvious bulging, failure, etc. during the warranty period, the manufacturer should replace them. This is the basic after-sales service of a manufacturer. At the same time, it should be noted that the impedance of the film capacitor is inversely proportional to the frequency. As the frequency increases, the loss also increases. Measures must be taken to limit the harmonics and inrush current in the circuit. Film capacitors always generate heat, so special attention should be paid to ventilation and cooling. During the trial operation, the system should be tested, and measures should be taken in time to prevent accidents when overvoltage, overcurrent, oscillation, harmonics, etc. are found.
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