Overview and connection descriptions
The brochure first calls this a Scott transformer converting a three-phase input into two single-phase outputs. It states that the two single-phase loads must have equal capacity or three-phase current imbalance results. Applications are specific loads in industrial and mining enterprises, at 50/60Hz. This passage states class F heat-resistant insulation, cold-rolled grain-oriented silicon-steel laminations, and cylindrical, oval or rectangular windings.
A following passage describes a special T-connected transformer converting three-phase AC into single-phase AC for large single-phase loads, improving network balance. It particularly identifies line-frequency melting supplies, with no balancing capacitors or reactors required.
A further passage describes three-phase input and one single-phase output, nearly balanced input phase currents and no frequency distortion. Other technical and service requirements are described as similar to ordinary dry-type transformers, with cost above an isolation transformer. It states AC50/60Hz, working voltage below 1140V, insulation heat classes F, B and H, and manufacture to JB/T8750-1998 as a brochure claim.
