Does the capacity of the safety capacitor have a relationship with the voltage?

Generally, the dielectric constant of the insulating material between the plates used in the capacitor is a fixed value, so the capacity of the safety capacitor is independent of the voltage applied across the plates. When the voltage across the capacitor changes, the amount of electricity in the safety capacitor With the change, its ratio Q/U is a constant, that is, its capacitance; the voltage change is related to the current of the safety capacitor and KVAR! As the voltage rises, the current and KVAR will increase!

In the safety capacitor structure, the capacitor is composed of an insulating medium added between the two plates. The capacitance is proportional to the plate area and inversely proportional to the thickness of the medium. The area generally does not change, and the thickness of the medium may be thinned or weakly broken due to factors such as time ambient voltage during use, so that the capacity changes.

When the safety capacitor is connected to the AC power supply, the free charge does not actually pass through the dielectric between the two poles, but only because the voltage between the two plates changes. When the voltage rises, the charge accumulates on the plate of the safety capacitor  Charging current; when the voltage is lowered, the charge leaves the plate and forms a discharge current. The safety capacitors alternately charge and discharge, and there is a current in the circuit, which is expressed as an AC "pass" safety capacitor.