Abstract: In a current-limiting device, a plurality of current-limiting elements are connected in series to one another, and are inserted between the system power source of an electric power system and the load thereof. In the device, transformers, the number of which is equal to that of the current-limiting element S1 through Sn, are arranged. The primary windings of the transformers are connected to the current-limiting elements in the same polarity, respectively, and all the secondary wings thereof are connected in parallel to one another.

Abstract: Molten glass is uniformly heated between a plurality of pairs of electrodes which receive electric current from a current source which includes a like plurality of transformers and a source of electric power, the primary windings of the transformers being connected in series to the power source and each secondary transformer winding being connected to an associated pair of electrodes. The transformers feed and control the electric current to equalize the current regardless of electrical resistance variations in the material due to rising temperatures.