V series (1936 to 1972) Previous
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In 1936, a completely new line of polyphase meters was introduced with the new standardized socket and A-base mountings. Unlike previous models that had several variations under the same model number, the V series had a separate model number for the type of service it was designed for: V-2 (3-wire network), V-3 (3-phase 3-wire), V-4 (3-phase 4-wire Y; 3 stator), V-5 (3-phase 4 wire Y; 2 1/2 stator), V-6 (3-phase 4-wire delta; 2 stator), V-7 (3-phase 4 wire; 3 stator), V-8 (2-phase 5-wire), and V-10 (totalizing). The V-4, V-7, and V-10 3-stator models were only made in A-base, all the others were available as either socket or A-base. Socket-type V-series meters use the same bakelite-insert base as the I-30 singlephase meter. Early V series meters had a chrome steel magnet which was replaced by an Alnico II magnet assembly in 1940 that was more resistant to surges. In 1955, a much more compact Alnico V magnet was introduced and was easier to adjust than the previous magnets.
 
V-3A
Photo by Marlow Galbraith
V-7A
Mark Higgins collection