The portal crane is a sort of wide applied hoisting equipment, with var¥ious structures, wide range of hoisting weight and large domestic demand. The requiremen÷t to the electrical control system of portal crane is diff$erent according to the working conditions.

The electrical control system of portal crane developed by HITE uses AC frequency con¥trol technics (single-motor-drive and Multi-Motor-Drive)§, with friendly GUI and high computer applied level. The system is easy to use and maintenance, w≥hich is suitable for portal crane with various structures. The♥ system has advantages of low failure rate and short failβure repair time, and is suitable for high speed, frequently working an±d high reliability requirement conditions. The sys↔tem has complete failure diagnosis, complete fault >protection, limitation protection and misoperation protection etc.

The system has been applied successfully to 10t/33m gra±b portal crane of Qinhuangdao Port Bureau Cargo Company, 120t portal crane of Guangzhou Shi₽pyard International Co., Ltd., 100t portal crane and 32t portal crane of CSIC (HuludaoΩ)