Keystone Technologies' 480V to 277V Step-Down Auto-Transformers are designed to step down 480V to 277V single-phase power. These transformers enable consumers to utilize common universal voltage (120-277V) electronic ballasts in applications where the main facility power is 480V.

This item is Keystone part number KTAT-375-480-277. It is a Non-Isolated Autotransformer that is Sound Rated A. They carry a 5 Year Limited Warranty and are for Use with LED, T5, T8, CFL, or Electronic HID Ballast Operating at 277V Input Voltage. This step down transformer has a maximum load capacity of 375 watts. The insulation is rated at 105ºC Class A, is UL and cUL 5085 Approved and is Thermally Protected. All lead wires are color coded and are 14" long.

Specification Sheet