A conjugate-impedance network analyser operating at 50 c/s

The paper outlines the design and performance of an economical conjugate-impedance type of network analyser operating at 50 c/s which was developed by the Central Electricity Authority for use by the various Electricity Boards and Divisions. The means and compromises adopted to achieve the specified operational performance are discussed. The development of the analyser involved, amongst other things, the design and development of a composite equipment for the measurement of voltage, current, real power, reactive power, phase angles and¿when used in conjunction with a calibration source¿the calibration of the shunt and series impedance elements used in the analyser. A comparison between the data obtained by measurements from the network analyser and rigorous calculations for four types of problem is given.