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In power systems, how can an appropriate surge protection module be selected to address the issue of motors and frequency conversion equipment shutting down due to voltage surges? Firstly, it is necessary to decide whether to use a restart-type or a hold-type approach, based on the continuous operation requirements of sensitive loads in the manufacturing process. Since power interruptions are short-lived, with most such interruptions lasting only dozens to hundreds of milliseconds, a restart-type approach can be chosen if the equipment allows for brief stops. Once power supply is restored, by setting different startup delays, automated batch restarts can be achieved at the production site; this approach is particularly suitable for environments with many motors and frequency converters. If the equipment does not permit stops, then a hold-type approach should be used to maintain the control circuit reliably, thereby preventing widespread shutdowns due to equipment stops. Of course, it would be even better if maintaining and recovering could be combined into one. The newly launched DCM621KH intelligent motor anti-interruption device by Guogao Electric achieves this functionality. When a power interruption occurs, the device is powered by its built-in supercapacitor to continue operating normally. For interruptions lasting less than 500 milliseconds, the device utilizes its internal contacts to maintain the proper operation of the motor control circuit ； If the flicker time is greater than 500 mS and the contactor has been released, once the device detects that the voltage has returned to normal, it automatically enters the \"synchronous restart\" mode. Secondly, the anti-voltage-fluctuation module needs to have an intelligent start-up detection function, capable of accurately and quickly distinguishing between voltage fluctuations in the power grid, manual shutdowns, equipment failures, and so on. Once again, it is necessary to consider the synchronous restart function of the anti-voltage-dip module. In industrial settings, there are many inductive loads, such as direct-on-line motors. When power is lost, these motors enter a “coasting” state, feeding electricity back into the power grid and causing significant residual voltage on the cables. An excellent anti-power-fluctuation module should feature multiple protection functions, including overload protection, short-circuit protection, and overvoltage protection, to ensure the safe operation of equipment and systems. Finally, consider the reliability and durability of the anti-strike module. In power systems, surge protection modules typically need to operate stably for long periods of time; therefore, it is crucial to choose a module with good reliability and durability. This helps to reduce the frequency of equipment maintenance and replacement, thereby improving the overall operational efficiency of the power system. In summary, when selecting a suitable anti-power-fluctuation module, one must consider factors such as power and current parameters, stability and response speed, protection functions, reliability, and durability. I hope the above suggestions will help you select a suitable surge protection module to address issues such as motor and frequency conversion equipment shutting down due to surges, thereby improving the stability and reliability of the power system.