Progress in the art of metering electric energy: III — Special applications

This third in a series of four articles on the progress of the art, sponsored by the AIEE committee on instruments and measurements, deals with specialized applications of the basic energy-metering unit; the concluding article will appear in December THE BASIC energy-metering unit, the single-element meter containing one potential coil and one current coil, has been discussed in the first two sections of this report. A report of this nature, however, requires that certain specialized applications of this basic unit be given consideration. Such applications are: its modification in order to measure energy in three-wire circuits; its use in multiple to measure energy in polyphase circuits; and, with further modifications, the development of a demand meter that would differentiate between varying types of customer use and more accurately reflect the cost of furnishing service.