Automatic corona-loss measuring equipment

The paper describes equipment manufactured for the Central Electricity Research Laboratory for the purpose of measuring and continuously recording the corona power loss in an experimental transmission line. The measurement is made by means of a novel high-voltage bridge circuit. The balance of this bridge is recorded on a chart, and can also be fed into a data-logging equipment. The loss can be measured over a very wide range, from 200W to 50kW, and from 200 to 500kV, with an overall accuracy of about 1%.