Transformer and Switchgear Components | Porcelain and Epoxy … transformer components, switchgear components, electrical connectors, porcelain hv bushings, porcelain lv bushings, epoxy hv bushings, epoxy lv bushings, no load tap changers, drain valves, current limiting fuses, air to air bushings, standoff insulators, thru wall window bushings, cable accessories, stud terminals, spade connectors, flexible copper connectors, switchgear apparatus, distribution transformers H-J International, Inc. H-J International, Inc. is one of the leading manufacturers and suppliers of transformer components, switchgear apparatus, porcelain and epoxy bushings and insulators, distribution and power transformers, and electrical connectors for the world market.