What is the decision of the insulation of the capacitor?

The insulation of some of the larger capacitors in safety capacitors is determined by the medium. Thus, capacitors of different capacities made of the same medium are utilized, but the effects exhibited above the insulation quality are the same. This is not directly related to size and size. So, what is the insulation performance of the capacitor?

In the actual measurement, it is known that the same type of capacitor in the case of the same manufacturing process and raw materials, the larger the capacitance, the smaller the insulation resistance, the impact is very obvious.

When the capacitance is large, the insulation resistance is mainly determined by the dielectric properties of the dielectric. When the capacitance is small, or the capacity is large but the surface is wet or anvil, the insulation resistance is mainly determined by the surface condition of the capacitor.

The time constant of the safety capacitor is determined by the resistivity and dielectric constant of the dielectric material itself, regardless of capacity and geometry. Although this is a result calculated based on the flat-plate structure, it is actually applicable to the wound-shaped structure. It should be noted here that the time constant of the capacitor is the nature of the capacitor itself, and it has nothing in common with the time constant in the circuit when it forms a time constant component with another resistor and should not be confused.

When manufacturing safety capacitors, the air contains a lot of dust and moisture and other corrosive gases are the key to the impact of the product. After these materials are in contact with the capacitor core, the performance of the entire capacitor is affected, so it is necessary to maintain absolute cleaning from the beginning of the manufacture of the capacitor to the end.

For the operators, it is necessary to strictly implement the standardized civilized manufacturing system in accordance with the requirements of process hygiene. Therefore, it is effective to ensure the quality of the capacitor product, which is to provide better help for the use of the capacitor.