Recent developments in electricity meters, with particular reference to those for special purposes

The paper gives a general survey of metering work in this country. Some particulars are given regarding the more usual faults found in service, and the requirements for maintained accuracy are briefly discussed. Various standard types of meters are examined and recent modifications detailed. Methods used for obtaining summated demands and consumption are discussed, together with various types of equipment for special purposes. The development of reactive kVA metering methods is traced and apparatus described. The testing of such apparatus is difficult and calls for a high degree of skill. Finally, a few remarks are made regarding special tariffs and testing procedure.