Abstract:This text introduces the application of Emerson highpower TD3000 frequency converser in the grabcrane. After using this converser in the grabcrane, the problem about the bearing balance of the main/closed steel wire rope is well solved, the soft starting and soft stopping method greatly reduces the impulse current at the time of starting and braking, and the converser itself has complete and sensitive protection function, which greatly improve the stability of the operation of the grabcrane and prolong the life of the system.