• Crane Control Equipments

Electro magnetic brakes

Crane Control Equipments offers electro magnetic brakes suitable for AC supply up to 400 to 440 V, available for a wide range of drum sizes from 100 mm to 380 mm dia. These brakes are available with a rated torque ranging from 200 kg cm for the smallest brake (100 mm dia) up to 6900 kg cm for a 380 mm dia at 50% coil rating, ie, the coil remains in circuit for a maximum of 5 min out of every 10 min. These brakes are conventionally termed as single phase EM brakes although they are to be operated on 2 phase. 3-phase brakes are also available where a higher torque is desired. Since these brakes are in normally closed position, the release of the brake shoes is effected by energizing the electro magnetic coil which over comes the spring force and the shoes are moved clear off the drum by lever/arm linkage system so that the drum is free to rotate without any friction. When the power in given to the electro magnetic coil the coil gets energised and in turn pulls the plunger down the plunger in turn operates the arm of the brake and the brake opens. The design of the brake is such that as the lining keeps wearing out due to normal operation of the brake, adjusts itself on its own to achieve the rated torque. When specified, brake drum or brake drum coupling both pin bush type and flexible geared type can be supplied alongwith the brakes.