Motorized Chain Pulley Block adopts screw and friction disc type, self actuating braking mechanism. The Chain Pulley Block has a totally enclosed control panel to protect it from weather, giving output at 24 Volts to the operational control station. The Chain Pulley Block is designed for continuous duty operation and can also be used in case of power failure. Motorized Chain Pulley Block works in single phase as well as three phase mode of operation.