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As a national electrical product that requires mandatory safety certification, the residual current device (RCD) plays a crucial role in ensuring the safety of users' lives and property. Therefore, the quality of RCDs has always been a top concern for consumers. Installing qualified RCDs in low-voltage power distribution systems is an effective technical measure to prevent electrical fires and damage caused by electric shocks or leakage. Especially in rural low-voltage power grids, the use of RCDs has significantly reduced personal electric shocks and equipment damage. With continuous improvements in performance and functionality, RCDs have become widely adopted. After the “two changes and one price” reform in rural power networks, the demand for RCDs has surged, as these devices are primarily composed of electronic components. The quality and performance of these components—such as electronic parts, electromagnetic devices, and materials—are influenced by factors like environment, temperature, production processes, and technical standards. Monitoring the quality of RCDs, implementing dynamic management, and raising the awareness of production operators are essential to prevent substandard or counterfeit products from entering the power grid transformation projects. This helps maintain the safe supply and orderly operation of low-voltage distribution systems and protects the rights of both producers and users. Now, how can we strengthen and standardize the quality supervision of RCDs? Here are some insights and suggestions for reference.

1. Uphold the safety certification of RCDs, as it serves as the foundation for ensuring product quality. Implementing safety certification ensures that the product’s quality is clearly defined and verified at the time of production. Since this process is conducted by state-authorized quality supervision organizations following standardized procedures and evaluation criteria, the results are highly accurate and authoritative. Additionally, it allows for the inspection of production conditions, technology, and quality management within manufacturing enterprises. It also promotes standardization of production processes, technical specifications, and quality assurance systems, ultimately improving the reliability of production equipment and testing instruments. Moreover, the implementation of safety certification significantly enhances product stability and performance. Products with certification demonstrate more consistent quality over time, proving that safety certification plays a vital role in shaping future product quality. Thus, maintaining safety certification is not only a prerequisite for product quality but also a key part of legalizing and standardizing the RCD industry.

2. Conducting quality tracking and monitoring of RCDs is an effective way to ensure product quality and safeguard the rights of manufacturers and users. Quality is the lifeblood of any product, and those lacking vitality will eventually be eliminated from the market. From production to installation and usage, product quality undergoes a dynamic process. Tracking and monitoring its quality ensures that it remains stable. Therefore, quality tracking and supervision should be the core of RCD quality control. Key aspects include: ensuring the authority of the quality tracking organization, adhering to the principles of fairness, justice, and openness, promptly issuing quality improvement recommendations, and conducting regular re-examinations to guarantee the continuity of supervision.

3. Strengthening the legal awareness and using legal tools are essential for effective quality supervision. Enhancing the legal awareness of both quality supervisors and manufacturers is fundamental to achieving a legal and standardized quality control system. This directly affects whether quality supervision can be carried out in accordance with the law and whether legal means can protect the reputation and rights of qualified products. In our province, for instance, local regulations clearly state that producing or selling unsafe electrical products will result in legal consequences, including RCDs. This reinforces the importance of legal compliance in quality control.

4. Providing timely quality information and increasing investment in science and technology are key to improving and ensuring product quality. The quality supervision department regularly feeds back the operational and commissioning rates of RCDs to manufacturers, which encourages them to improve production quality and invest more in research and development. Promoting the application of high-tech, stable-performing new products also motivates companies to innovate, develop better solutions, and apply for technical patents, thereby enhancing product quality and technological value.

5. Suggestions for conducting quality supervision include: further strengthening quality tracking of certified products, unifying standards, and expanding the scope of inspections; actively supporting the development of new products by manufacturers and research institutions; enhancing post-operation monitoring and after-sales service feedback; and establishing provincial industry associations to oversee product quality, pricing, and service, preventing unhealthy competition based on low prices and poor quality.