The Influence of Operating Conditions on the Construction of Electrical Capacitors

The paper describes the construction of electrical capacitors, shows the importance of excluding air and moisture from the dielectric and suggests how the sealing mechanisms may be assessed. Various methods of sealing are discussed, and the factors influencing the choice of dielectric to suit the electrical circuit and its ambient conditions are considered. The life required from capacitors is related to their main uses and to the geographical locations in which they may be required to operate.