Keystone's step down transformers are ideal for powering down from a 480 volt or 347 volt system to a 277 volt system, rated up to 150 watts
Utilizing a precision wound core and coil integrated design, these autotransformers provide a safe and reliable solution for effective power conversion to use standard 277 volt or multi-voltage lighting ballasts
TypeStep Down Transformer
BrandKeystone
Output Voltage480V or 347V
Input Voltage277V or 240V
Watts150 Watts
Keystone Step Down Auto-Transformer Product Bulletin