![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
If the voltage is lowered to the following range, the intermediate relay is released, the self-locking is released, the foot of the inverter is disconnected, and after the power supply returns to normal, the inverter cannot automatically restart after the foot is disconnected, and the start is required. The feasibility of setting the self-starting parameters can be concluded from the experiment. The voltage is pulled down to an interval and the dwell time exceeds the self-starting function parameter to be effective. The pinch of the Shantou Science and Technology Academic and Empirical Device is not broken. The voltage is pulled down to one or less and stays. When the motor running on the production line exceeds the secondary control loop, the motor will stop running. After the power supply returns to normal, the inverter will not restart automatically because the foot is disconnected. It is necessary to manually start each motor. Therefore, according to the several voltage fluctuations that have occurred in our company so far, basically the inverter is stopped, and the whole plant non-frequency variable speed motor has only experienced a complete shutdown phenomenon. It can be seen that in the case of multiple voltage fluctuation accidents so far, basically, the voltage is only lost to an interval, and the residence time is greater than this.
The experimental results show that after the voltage fluctuation, the instantaneous starting current of the inverter will be close to twice the input current of the inverter, which is equivalent to the output current of the inverter before the voltage fluctuation, and the inverter motor running on the current production line will not reach. The rated current, the main switch of the inverter input switch and the inverter will not trip overcurrent. The mechanical part of the motor will not be greatly affected, of course, this needs to be verified. The voltage fluctuation inverter self-starting is used for the failure of the non-return control part. Due to the high pressure alarm and protection measures, the operation of the pre-stage pump can be stopped in time, and then the manual start operation can be performed. Therefore, through the above experimental analysis, it can be considered that setting the self-starting parameters can at least reduce the loss due to voltage fluctuations, and is completely feasible.
Derrick crane, also known as Roof Crane, is a specific style of lifting machine. It is usually a fixed building crane, meaning it is assembled and disassembled in the location where it is used. Generally, the crane is characterized by its long, fixed length tower. These cranes are typically used in locations where items need to be moved from a common initial point to single nearby location, like on shipping platforms and construction sites. BQ models of derrick cranes including 10T Derrick Crane 2533A, 6T Derrick Crane DCB20-6, 10T Derrick Crane DCB24-10, 12T Derrick Crane DCB30-12, 16T Derrick Crane DCB30-16, 18T Derrick Crane DCB42-18.
Roof Derrick Crane,Roof Crane,10T Derrick Crane,Derrick Crane Roof Crane,Building Crane
SHEN YANG BAOQUAN BUSINESS CO., LTD , https://www.sytoplesstowercrane.com