... 4.Output Speed:5r/m Feature of HH - AD24 ac/dc rolling door motor ·attractive appearance, advanced structure, horsepower strong;· ... Configuration high-power low loss ring transformer, utility can direct drive motor;·Low noise, small vibration, low consumption;·Light weight, ... protection lighting, delay cabin for 3 minutes. 500kg AC/DC Rolling Door Motor:1.Low noise, small vibration.2.long ...