Load management and power factor improvement is very important for industries, where power factor is less than 0.8.In the industries there is a separate department of electrical, where the power engineers continuous examine the power factor, for this purpose they hire those people who worked on load management, and know about the power factor. If the power factor is poor then the utility bills is increases, if the power factor is good then there is a significant reduction in utility bill. Utility bills is inversely proportional to power In this book a setup was made in order to improve the power factor. Это и многое другое вы найдете в книге Load Management/Power Quality of Commercially Connected Loads (Kashif Imdad)