Light aluminum alloy shell shall be adopted which is light but hard and fit for the use in theterrible work environment with a high heat dissipation rate and all tightness design;
Inverse phase sequence protecting device: lt is the special electrical installation which control thecircuit not to work in case of wiring error in the power supply;
Limit switch: The limit switch device is installed where the weight is lifted on and off to make themotor to stop outomatically so as to prohibit the chains from exceeding for safety;
24V/36V device: it is used to prohibit the emergencies from occurring in case of the leakage inthe switch;
Side magnetic braking device: This device shall realize the instant brake in case of the power dump;
Chain bag: lt shall be light, handsome and durable;
Chain: The chain shall adopt the imported FEC80 ultra heat-treatable aluminum alloy chain.