Electric capacitors are one of the cheapest and simple sources of energy saving currently known, which allow both the distributor and the company to save money. Power factor correction determines a rational use of electric power, reducing the undesired effects of load currents such as motors, transformers, etc., and losses due to the Joule effect in the cables and devices (switches, transformers) present on the energy transport system. Moreover, the additional costs that would be incurred, without PFC, are so high that they result in a very rapid return on investment.
Automatic power factor correction equipment are the most complete and intelligent solution – thanks to the management of the regulator – to compensate for reactive energy. Through an excellent division of the steps, the power of the capacitor banks allow producing the most accurate quantity of reactive power, thus guaranteeing the highest achievable power factor (cosphi). Automatic PFC systems differ on the basis of one or more of the following criteria:
When in the presence of harmonics, it is necessary to choose systems equipped with blocking reactors, which differ according to:
Furthermore, all the series can be designed with static insertion: the technology involves the insertion of each capacitor bank by means of zero-crossing static relays (thyristors), instead of traditional electromechanical contactors. This type of insertion is necessary for all those applications that require very high electrical duration and/or operating frequency, high resistance to shocks, vibrations, and movements (e.g. overhead cranes), or in installations where it is necessary to use silent equipment (e.g. offices, banks, homes, hotels, …).
Fixed power factor correction devices are the ideal solution for the compensation of no-load transformers or loads with constant absorption. Thanks to their compact size, they easily find space and can be installed quickly.
Harmonic filters are designed for the suppression of harmonic distortion, as well as for the partial power factor correction of the loads. In fact, an increasingly widespread problem for power distribution are overloads due to harmonic currents introduced by electronic equipment, both single-phase and three-phase, for motors and drives, UPS, welders, air conditioning systems, and some types of PV installations. In these cases, the current is not perfectly sinusoidal and derives from the sum of currents with multiple frequencies, which therefore causes both functional and premature aging problems to the electrical system, components, and installed machines.
Capacitors and power factor controllers are the fundamental part of power factor correction systems: these components ensure maximum efficiency, effectiveness, and safety of the equipment. Furthermore, thanks to the quality standards of design and manufacturing, they ensure the best durability on the market.