600 Delta Primary Volts - 480Y/277 Secondary Volts - Acme three phase low voltage distribution transformers are designed for industrial and commercial applications. All of Acme general purpose transformers are rated for 600 volts and below. Encapsulated units are offered in ratings up to 15kVA. Ventilated units are available in ratings up to 1000 kVA and meet the requirements of U.S. DOE 10 CFR Part 431 (NEMA TP1) efficiency standards.UL-3R enclosure meets or exceeds all listing criteria including NEMA, ANSI and OSHA standardsUL Class 180°C insulation system 115°C riseCompletely enclosed, suitable for indoor/outdoor serviceEncapsulated and completely enclosed design electrical grade silica and resin compounds completely enclose the core and coil to seal out all moisture and airHigh efficiency and excellent regulationSound levels below NEMA standardsKeyhole mounting slots permit installation of mounting bolts prior to hanging transformer and are accessible form the frontWiring connections can be made outside of wiring compartment due to the use of flexible leadsTermination - Copper lead wireElectro static provided on all 60 Hz isolation transformers600 Delta Primary Volts; 480Y/277 Secondary Volts; 3Ø, 60HzOut of Package Height (in)18.860Out of Package Width (in)20.300Out of Package Length/Depth (in)9.030Out of Package Weight (lbs)250.000