Safety capacitor burst causes (2)

4) Insulation damage, especially if the manufacturing process of the high-voltage side lead wire is poor, the edge is uneven, there is burr or serious fold, the corona is easily generated at the tip, the corona decomposes the oil, the shell case expands, and the oil surface drops to cause component breakdown. . In addition, if the welding time at the corner is too long at the time of capping, the internal insulation is destroyed, the breakdown voltage is reduced, and the safety capacitance damage is easily caused, thereby causing a burst accident.

5) When conducting closing with electricity, at the instant of closing, the polarity of the voltage may be opposite to the polarity of the residual charge of the safety capacitor, thus causing burst.

6) Poor ventilation, excessive temperature rise, severe overvoltage and large voltage harmonics can also cause bursting.