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The QDW3 series universal air circuit breaker is engineered for AC 50Hz power distribution systems with rated voltages of 400V and 690V, supporting currents up to 6300A. This breaker is ideal for protecting circuits and electrical equipment from overload, under-voltage, short-circuit, and single-phase grounding faults.
With intelligent and selective protection capabilities, the QDW3 enhances power supply reliability while minimizing unnecessary outages. It is widely used in power stations, industrial plants, mining operations (690V applications), and modern high-rise buildings, particularly in intelligent building distribution systems.
The breaker complies with international standards IEC60947-2 and GB14048.2, and carries CE certification. Its robust design features include energy-storage operation, air arc-extinguishing medium, and open frame installation.
Available in 3P and 4P configurations, the QDW3 series offers models ranging from 630A to 6300A capacity. The breaker's advanced protection functions include conventional circuit breaking, circuit-breaker failure protection, overcurrent protection, and overvoltage protection (OVP).
Key technical specifications include full breaking time of 20-30ms, rated short-circuit breaking capacity up to 120kA at 400V, and rated impulse withstand voltage of 8000V. The breaker is available in both fixed and draw-out versions to suit various installation requirements.
With certifications including ISO9001-2000, CE, CB, and CCC, the QDW3 series represents a reliable solution for demanding power distribution applications. Its intelligent protection features make it particularly suitable for modern electrical systems requiring high reliability and selective coordination.
Yep, the shipping was incredibly fast and reliable, arriving ahead of schedule without any delays. The packaging was secure and well-handled, ensuring the item reached me in perfect condition. As for quality, it feels robust and well-manufactured, with no visible defects or issues upon inspection. The customer service team was responsive and helpful, promptly answering my queries and providing clear updates. Overall, a smooth and satisfying experience from start to finish, making it a reliable choice for anyone in need of such products.
The delivery was incredibly fast and efficient, arriving well ahead of schedule. The packaging was secure, ensuring the product arrived in perfect condition without any damage. The quality of the item is outstanding, with solid construction and reliable performance that meets all expectations. Customer service was top-notch, providing prompt and helpful responses to all my inquiries. Overall, a fantastic experience from start to finish, highly recommended for anyone in need of such products.
Outstanding experience with this purchase! The delivery was incredibly fast and efficient, arriving well ahead of schedule without any delays. I was thoroughly impressed by the careful packaging, which ensured the product arrived in perfect condition. The quality of the item is exceptional—it feels robust and well-made, clearly meeting high standards. Customer service was top-notch too; the support team was responsive and helpful, addressing my queries promptly and professionally. Overall, a very smooth and satisfying transaction that I would highly recommend to others.
Delivery was incredibly fast and efficient, arriving ahead of schedule without any delays. The packaging was secure and well-handled, ensuring the product reached me in perfect condition. Quality-wise, the item feels robust and well-manufactured, meeting all my expectations for durability. Customer service was outstanding; the support team responded promptly and courteously to my inquiries, making the entire process smooth and hassle-free. I'm thoroughly impressed with the overall experience and would highly recommend this seller for their reliability and professionalism.
Vastly impressed with the overall experience of receiving this air circuit breaker. The delivery was incredibly swift, arriving well ahead of the estimated schedule, which minimized any downtime in our factory operations. The packaging was robust and secure, ensuring that the product was in pristine condition upon arrival, with no signs of damage or mishandling during transit. In terms of quality, the build feels solid and durable, reflecting high manufacturing standards that align with the IEC60947-2 compliance mentioned. Customer service was exceptional; the support team was responsive and helpful, promptly addressing my queries about the order. This seamless process from ordering to delivery has made sourcing components for our power distribution systems much more reliable and efficient.
The shipping was incredibly fast and reliable, arriving well ahead of schedule, which was a pleasant surprise. The packaging was secure and protected the item perfectly during transit. In terms of quality, the product feels sturdy and well-made, with no visible defects or issues upon inspection. Customer service was outstanding; the support team responded promptly to my inquiries and provided clear, helpful assistance throughout the process. Overall, a very satisfying experience that I would highly recommend to others.
Never have I experienced such a seamless process from start to finish. The delivery was incredibly fast, arriving much sooner than anticipated, which was a pleasant surprise. The packaging was secure and ensured the product was in perfect condition upon arrival. In terms of quality, it feels robust and well-manufactured, giving me confidence in its durability. The customer service team was outstanding; they were responsive, polite, and went above and beyond to address my inquiries promptly. Overall, a top-notch experience that I would highly recommend to others.
Outstanding experience overall! The shipping was incredibly fast, arriving much sooner than expected, which was a huge relief for our project timeline. The packaging was secure and professional, ensuring the product arrived in perfect condition without any damage. As for quality, the circuit breaker feels robust and well-manufactured, with a solid build that inspires confidence in its durability and performance. The customer service team was exceptionally responsive and helpful, answering all my queries promptly and providing clear guidance. I highly recommend this for anyone needing reliable components for industrial applications.
Logistics were incredibly fast and efficient. The package arrived ahead of schedule, well-packaged and secure. Quality appears top-notch based on initial inspection; the materials feel durable and well-manufactured. Customer service was responsive and helpful throughout the process, promptly answering my queries. Overall, a very positive experience with no issues to report. I am thoroughly satisfied and would recommend this to others. The delivery was smooth, and the product met my expectations in every way. Excellent support team made the transaction hassle-free. Great job on all fronts!
The delivery was incredibly fast, arriving two days earlier than expected. The packaging was secure and professional, ensuring the product reached me in perfect condition. Quality-wise, the circuit breaker appears robust and well-manufactured, with no visible defects or issues. Customer service was responsive and helpful when I had a query about the shipping status. Thoroughly impressed with the overall experience from start to finish. The attention to detail in both the product presentation and support aspects made this a very satisfying purchase. I would definitely recommend this supplier for their efficiency and reliability.
