Loss of revenue on heating and lighting loads, due to poor voltage regulation

Discussion on the subject of revenue loss due to poor voltage regulation has generally been of an inconclusive nature by reason of the fact that a quantitative basis has been lacking. After making an examination of the characteristics of lowtension electricity supplies to domestic lighting and heating consumers the author puts forward a method of calculating the amount of the loss, considering only cases where the principle of revenue loss can be reasonably said to apply. The results indicate that the loss is sufficiently large to warrant closer consideration than it has hitherto been given, and in certain cases to justify expenditure on network modification, or the installation of automatic voltage-regulator equipment to prevent voltage variation. In order to show its relative importance the principle is applied to the calculations normally carried out when transformers are being purchased, and in the case considered it is shown that it completely outweighs in importance the cost of iron and copper losses.