The protection measures of low-voltage shunt capacitors produced by different power capacitor manufacturers are also different. Common power capacitor protection measures include over-pressure pull-off, over-current protection, over-temperature warning of smart capacitors, and so on. When the life of the power capacitor ends, the polypropylene metallized film will generate a large amount of gas, the pressure inside the power capacitor will increase rapidly, the top cover of the capacitor will be under pressure, and the terminal of the capacitor will be separated from the connection point, thereby
protecting
Power capacitors. Due to the influence of harmonics, capacitors may pass through a large amount of harmonic currents . When a large current passes through the power capacitor, the fuse will be blown instantly and the connection of the capacitor will be disconnected, which is also one of the common protection measures for power capacitors. Built-in discharge resistance protection device In addition to overpressure and overcurrent, most power capacitors are designed with built-in discharge resistance, which reduces the probability of electric shock for operators and improves the flexibility of power capacitor installation.