DITEK's DTK-DL-277/4803 light pole surge protector adheres to D.O.T. standards for outdoor lighting, providing 277/480VAC three phase protection. DITEK's DL Series of Light Pole surge arresters have been engineered to meet stringent D.O.T. standards to protect outdoor lighting. These series connected surge arresters provide optimum protection for high mast lights, highway lighting, standard street lights, and parking lot light poles.