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I. What harms can voltage fluctuations cause to manufacturing enterprises: 1. When the power grid experiences fluctuations, accompanied by frequent voltage drops, contactors may exhibit the following behaviors: vibration and heating – Grid fluctuations can cause the contacts of a contactor to vibrate briefly, resulting in unstable contact, which can lead to instability or interruptions in the circuit； On the other hand, this causes an increase in the resistance at the contact points, resulting in heat generation; prolonged heating can lead to damage or failure of the contactor. Contactor tripping: If the voltage drop is significant or lasts for a long time, resulting in a level below the contactor’s holding energy, the contactor may trip and automatically disconnect the circuit, causing the load to stop operating. The contactor coil trips, causing the critical load to stop, which severely affects production safety. 2. Equipment damage: Voltage fluctuations can cause severe damage to a company’s production equipment. Especially when the voltage is too high or too low, sensitive devices such as electronic equipment, motors, and sensors are prone to damage, which may require repair or replacement of these devices and thus increase a company’s maintenance costs. 3. Production line shutdown: Voltage fluctuations can also cause the production line to stop operating. When the voltage fluctuates suddenly, the equipment may malfunction, shut down, or fail to operate properly, resulting in production disruptions. 4. Quality issues: Voltage fluctuations can lead to quality problems with the products. During the production process, unstable voltage can lead to deviations in product manufacturing parameters, mechanical failures, or inaccurate production records, thereby affecting the quality and consistency of the products. Obviously, grid fluctuations can have many adverse effects on manufacturing enterprises, but these effects can be completely avoided through appropriate protective measures and safeguards. Let’s take a look at the specific solutions. II. Solutions 1. Rapid switching device on the power supply side: The DCM635 is a device for seamless and rapid switching of power supplies. In the event of a failure in the system’s power supply, this device can quickly disconnect the faulty power source, based on the system’s operating status. It then checks the voltage quality on both sides before connecting the backup power supply; if the conditions are suitable for switching, the backup power is connected. This prevents power interruptions or damage to equipment that could occur during rapid power switching, ensuring that the load continues to operate without interruption. For some critical equipment or production lines, it is advisable to install quick-switching devices; this way, in the event of a voltage drop, a backup power supply can provide a stable power supply and ensure the continuity of production. 2. Addition of an anti-vibration power failure module: The DCM621KH restart-type anti-vibration device generates a composite judgment criterion by monitoring the voltage of the operating power supply, the contactor coil voltage, and the voltage in the control circuit. After startup, it enters anti-vibration standby mode after a 5-second delay; when there is a change in the contactor position signal, the internal supercapacitor system is activated automatically, and the system begins timing. If power supply is restored automatically within the set maximum time period for power failure, the motor is started after another delay period, thereby restoring normal operation prior to the power failure and ensuring uninterrupted production. Regardless of the solution chosen, businesses should consult professional electrical engineers or relevant experts to ensure that the issue of low voltage is properly resolved and to maintain normal production operations.