静电是相对静止的电荷，是一种常见的带电现象，如雷电、电容器残留电荷、摩擦带电等。静电的特点：电量虽不太大，但静电电压却很高，在绝缘体上的静电消散很慢。在生产过程中产生的静电，可在与它相接触的金属导体上感应出电荷，并产生很高的电压。静电荷会在导体的尖端集中 Electrostatic charge is relatively static, is a common phenomenon of electrification, such as lightning, capacitors residual charge, frictional charge and so on. Electrostatic characteristics: Although the power is not too large, but the electrostatic voltage is high, the static dissipation on the insulator is very slow. Static electricity generated in the production process, it can be in contact with the metal conductor on the induction of electricity, and produce high voltage. Static charge will be concentrated at the tip of the conductor