Understanding APFC Relays: What Are They and What Are Their Functions?

An Automatic Power Factor Control (APFC) Relay is an important appliance that controls the power factor in electrical networks. Power factor is the quality of the electrical power in the power system, stating the extent to which it is utilised. A power factor value near unity suggests that the electrical system is good, while a lower value suggests that there has been loss and inefficiency. Low power factor increases energy consumption and package costs for utility companies.
The APFC relay employs the system to ensure good power factor control by regulating the capacitor banks available in the circuit. Thus, its role implies maintaining the power factor at the optimum value and minimising energy loss and wastage. However, the APFC relay is very important in managing high power factors and preventing wastage of power in industries and commercial establishments.

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