H2 (1915 to 1928)	Back	Up	Next
After the H singlephase meter got redesigned, the same changes got incorporated into the H2 polyphase meter. Besides the vertical side-connected pattern, there was a horizontal pattern using 2 singlephase elements and a differentially-geared register. Using a chart on this meter and the timing of the two disks, the circuit's power factor could be calculated.

Handbook for Electrical Metermen

Photo by Bud Russell