Electrical Wire Rope Hoist
EXPLOSION PROOF HOIST
The Hitachi explosion-proof hoist is a rational system consisting of functional units of brake, motor, drum and emergency brake. It uses a brake with automatic adjusting device developed by Hitachi for the first time in the worid, saving the time and labor on the troublesome brake adjustment, as well as facilitating the maintenance.
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- When the load block is hoisted up to its upper limit, the operating circuit of electromagnetic switch is cut― off, interrupting the load block operation. Even if the operating circuit is shorted and the load block continues to rise, the safety is secured because of the “double― limit system” that cuts off the main circuit for the motor.
- The etectric-system of Hitachi explosion-proof hoist/crane saddle is totally enclosed. Even if an explosive gas exploded within the container, the container withstands the pressure of such an explosion and the gas existing outside of the container is not ignited, guaranteeing the explosion proof of the hoist/crane saddle.
- The explosion-proof ability of the hois/crane saddle is determined by the stipulations of either the “Explosion-proof Guideline for Electrical Equipment in Factories” or “Explosion-proof Standard for Gases and Vapor” though the conditions vary by the ignition group and explosion class of the using gas and the place of it’s existence. Not only the motor, but the brake and terminal box are all given the explosion-proof treatment.
