Capacitor Bank is a group of several identical capacitors interconnected in parallel or in series
with one another. These groups of capacitors are typically used to correct or counteract undesirable
characteristics, such as a power factor lag or phase shifts inherent in alternating current (AC)
electrical power supplies. They may also be used in direct current (DC) power supplies to increase
stored energy and improve the ripple current capacity of the power supply.
Single capacitors are electrical or electronic components which store electrical energy. They
consist of two conductors that are separated by an insulating material or dielectric. So, when an
electrical current is passed through the conductor pair, a static electric field develops in the
dielectric that represents the stored energy. Unlike batteries this stored energy is not maintained
indefinitely as the dielectric allows for a certain amount of current leakage resulting in gradual
dissipation of the stored energy.