Connection and protection of capacitor banks

THE FACT that capacitors are built in units of 25 or 15 kilovars for power circuits makes possible variety of groupings of these convenient “building blocks” to form large banks. The arrangement in which the capacitor units are connected in a 3-phase bank and the type of protective arrangement used may influence the cost of the installation; these factors will certainly have an important bearing on its operation and on the operation of its associated protective devices under fault conditions.