Advantages and maintenance of film capacitor temperature characteristics

1. The superiority of film capacitor temperature characteristics

The good temperature characteristics of the film capacitor, unlike the other capacitors, are that the dielectric material is a high temperature polypropylene film, and its temperature characteristics allow it to swim back and forth between -40 ° C and 105 ° C without being affected. After measurement, the capacitance of the film capacitor and its good brother electrolytic capacitor varies with temperature at a fixed frequency, and it can be analyzed that the gradual increase in temperature will cause the capacitance of the film capacitor to be due to the overall capacitance. Decrease and fall, but the magnitude of the decline is small, almost negligible, about 300PPM/°C; the capacitance of the electrolytic capacitor is different, and it varies greatly with temperature at any temperature. It is about 200-600 PPM/°C. The temperature characteristics of film capacitors make it less demanding in the environment, whether it is in the extremely cold northeast, the hot Taklimakan Desert or some other natural environment.

2. Maintenance of film capacitors

In the usual maintenance of film capacitors, it is necessary to check in time. For example, check whether it is under the correct current and voltage during the use of the product, and the indication of the relevant current voltmeter. During the inspection process, the appearance of the product is guaranteed to be intact, without any cracks or leakage. Check the product for abnormal heating and avoid problems during the operation of the product. Check whether there is flashover on the outside, complete connection, and do not let any small details in the inspection process to ensure timely detection of the problem and normal operation of the machine.