... power transformer 1Audio amplifier toroidal transformer 2Lighting lamp transformer 3power transformer 4Electrical Product Description for Toroidal transformer:Professional power supply transformer used ... 100V, 115V, 120V, 230V, 240V / 50 Hz c. Secondary Customized Power range: 20VA to 10KVAd. Standard UL506 ... organized a full quality control and R&D team.c. Use refined material, such as core, wire, ...