... overloading or abuse, the hook does not fracture but will slowly yield.2. PowerOperating voltage 220-440V, 50/60Hz, 1-3 phase.Low ... fitted at both top & bottom ends, switch off power automatically to prevent load chain from running out.4. Pushbutton SwithPushbutton swith ... and rope drum. It is also easy to install, reducing maintenance requirements for the unit as a whole.7. Safety BrakeThe dual ...