Selection of bridge crane accessories

The rated output current of the bridge crane inverter must be greater than the steady-state power current under the organization's maximum load torque. The operating organization of the crane is composed of the operating organization, operating rod and operating rod of the bridge crane. With display, control and alarm functions.
The overload of overhead cranes can be very strong. Due to the different operating systems of the organization, the permitted output torque of the motor is different from the data on the nameplate. In order to ensure that the temperature rise of the motor does not exceed the standard, the organization selects a motor that allows the output power to be greater than or equal to the organization's steady-state power, and the rated current of the frequency converter should be greater than the current of the organization's steady-state operation. Regarding the long-term full-load operation of the S2 operating system, it is necessary to confirm whether the permitted output current value of the inverter is the full-load requirement.
The overload limiter uses a wire rope viewpoint sensor, which is the tension required to be tightened after the wire rope is loaded. This force deforms the sensor block slightly to obtain the corresponding data. Then, the microcomputer uses these data to perform weight display and overload limit control, and open the normal closed point when the rated tonnage is reached. The lifting circuit of the bridge crane is cut off, the operation is stopped, and the reading is expanded: the four major damages of the overload operation of the electric double beam crane.
The overload capacity of the power switch of the bridge crane is different from that of low-voltage electrical appliances and electric motors. Therefore, there should be a large safety margin. According to the specifications or contract requirements, the bridge crane is tested, and the long-term power supply of the inverter should meet the test requirements. Such experiments include: 72h/168h full load test, 110% load dynamic load test, etc.

Pay attention to two points when installing: First, the overload limiter must be installed at the fixed end of the cable, that is, the wire rope is always fixed. We know that the electric hoist of the bridge crane has 2, 4, 6 wire ropes. When the electric hoist is hoisted, one or two wire ropes will not move. The overload limiter should be installed on the fixed wire rope. Secondly, the tightness of the pressure rope screw of the overload limiter should be strictly in accordance with the requirements of the manual, that is, the wire rope should be tightened to too tight or too loose when the wire rope is slightly deformed, which will affect the application.