... ,1300kg,1500kg,2000kg,2500kg lifting gate weight is optional. Outside motor for roller shutter door It is used for open and ... while in power failure.3.The enwinding group of the motor is with overheat protect equipment. When the temperatures rise up ... automatically to protect the motor. When the temperatures reduce to 70¡æ, it can be used again. 4.Low noise, small shaking, low ...