The I-30 meter was similar to the previous I-20 but used a new stator that had increased overload capacity and improved compensation. There were two major changes that were made early in the I-30's production span. First, the chrome steel magnets (which had been used since the I-16) were replaced in 1938 with an Alnico I magnet assembly that was more resistant to loss of magnet strength from lightning or power surges. After WWII, the cast iron internal frame was replaced with one made from a lighter aluminum alloy. I-30A meters made during WWII have almost no aluminum in them (which was needed for the war effort) - they have steel alloy bases, iron internal frames, brass registers, and cardboard nameplates. The I-30S used a compression-molded insert in the base instead of individual bushings. Wartime units are similar to the pre-war and postwar units except for the cardboard nameplates. Although this meter was superseded in 1948 by the I-50, it continued in production until GE stopped making meters at its original plant in Lynn, MA in 1954 (moving all watthour meter production to a plant GE opened in Somersworth, NH in 1948)
Most of the I-30-S likely were used on the early coop systems and likely got retired over the years as better models came on the market. These old jewel-bearing meters are heavy and need regular cleaning / maintenance.
This one in the 5-amp rating intrigues me. I have the equivalent I-30-A if you are interested.
Ohh I see, I always enjoy to look at old I-30-S and pretty quick spinning if apply 10-15 amp and it will spin slow if plugged a phone charger. just wondering how these I-30 series meter will last without cleaning and maintenance? I got this meter was nos and only start with 0002kwh and now about 0085kwh so far.
Found this meter turned lamp and my local flea/antique store. The internals look to be in great condition and the disc turns when the light is on.
However the gears do not engage with the rod. When I remove the screw/pin that holds the rod in place and separate it from the gear wheel, I'm able to move the wheel with my finger, all of the gears engage and the numbers change.
Can anyone share tips on tuning the gears in order to get them to start working properly?
Hi Kev312, The I-30 has a gear meshing adjustment for the first register gear. It moves the first register gear in or out to properly mesh with the leaves on the worm of the disc shaft. You want the teeth of register gear to be at least 1/3 to 1/2 into the leaves of the worm. I have to use a set of magnifying jewelers glasses to see the small detail.