Measurement of Shunt Reactor Loss at High Voltage with an Alternating Current Comparator Bridge

The application of a high voltage capacitance bridge based on the current comparator to the measurement of the loss angle of high voltage shunt reactors is described. Measurements on three core-less 55 MVA, 735 kV single phase shunt reactors are discussed and a comparison is made with the results of a calorimetric determination of loss which indicates agreement to better than 2 percent. Other bridge techniques for this type of measurement are reviewed.