Shenmao Capacitors specialized in aluminum electrolytic capacitors from 1970

How to ensure the safety of metal film capacitors? |Focus on mid-to-high-end brand capacitor manufacturers

by:Shenmao     2021-03-29
Metal film capacitors use a certain ratio of oil wax or sulfur hexafluoride as the impregnating agent. The impregnating agent is poured into the capacitor shell through vacuum impregnation, which can effectively eliminate the partial discharge phenomenon at the edge of the core. The crystal wax forms a stress area outside the core. When the component is self-healing, due to a certain stress, it can quickly extinguish the arc, preventing the expansion of the evaporation zone and the deterioration of the self-healing which may lead to accidents of the component. Compared with liquid impregnant, oil wax impregnant has stable performance, does not burn, and effectively solves the problem of oil leakage. 1 Safety device When the metal film capacitor fails due to self-healing failure, the internal metalized film is heated to soften and deflate, causing the capacitor to swell, the safety device can cut off the power supply in time to protect the entire device. There are many types of safety devices, such as mechanical type and electrical type. The safety device of the metal film capacitor integrates the power and the electric fuse, and has a dual function. It is placed inside the capacitor shell, and the deformation of the shell is used to start the fuse and cut off the power supply; in case the mechanical fuse is out of control, the electric fuse is activated immediately , Also cut off the power supply, thereby protecting the entire device. For more information, please call the toll-free hotline: 4006299138. 2 Self-discharge device When the metal film capacitor is out of operation, the self-discharge device can reduce the initial peak voltage of the capacitor to below 50V within 3 minutes to ensure operation and Maintain safety.
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