Reactive power compensating switchboards have the function of eliminating useless capacities in order to reduce Q fines from the power supplier (electricity). In addition, the reactive power compensating cabinets help to reduce voltage drop, support the device to start smoothly and increase the load carrying capacity of the line, which increases the lifetime of the machines .

The reactive capacity compensation switchboards have helped factories to reduce the amount of fines almost completely due to the large capacity of the electricity distribution unit.