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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.
Shipping was surprisingly fast and efficient. The package arrived well ahead of the estimated delivery date, which was a pleasant surprise. The item was securely packaged with ample protective materials, ensuring it arrived in perfect condition without any signs of damage. The quality of the product appears excellent upon initial inspection; the construction feels robust and it matches the described specifications perfectly. Customer service was responsive and helpful when I had a pre-sale inquiry, providing clear and timely answers. Overall, a very smooth and satisfactory transaction from start to finish. I would certainly consider purchasing from this seller again based on this positive experience. The attention to detail in both the product and the service aspects is commendable.
Very pleased with the overall experience. The shipping was remarkably fast, arriving well ahead of the estimated delivery window, which was a fantastic surprise. The packaging was exceptionally secure and professional, ensuring the product was completely protected in transit. Regarding the item itself, the build quality feels robust and solid, exactly as one would hope for a critical electrical component. It has a substantial, well-manufactured feel that inspires confidence. The service provided by the seller was also top-notch; communication was clear, prompt, and helpful from the initial order confirmation through to the delivery notification. All my inquiries were answered thoroughly and courteously. While I cannot comment on the technical performance or installation specifics at this time, the initial impressions based on logistics, physical quality, and customer support are overwhelmingly positive. The entire process was smooth and hassle-free, making for a very satisfactory purchase. I would certainly consider this seller for future needs based on this experience alone.
Excellent experience with the delivery speed. The shipping was remarkably fast and the package arrived well ahead of the estimated schedule. Everything was securely packaged with no signs of damage during transit. The quality of the product itself appears to be very robust and solid, exactly as described in the listing. The overall service from the seller was also commendable; communication was clear and prompt whenever I had a query. The entire process from ordering to receipt was smooth and hassle-free. I am thoroughly satisfied with this transaction and would not hesitate to recommend this seller to others based on this positive experience. The attention to detail in both the product presentation and the customer service aspect was evident and greatly appreciated.
Excellent shipping speed and careful packaging ensured my order arrived perfectly intact. The delivery was prompt, arriving ahead of schedule without any delays. In terms of quality, the product feels robust and well-manufactured, with no visible defects or issues. The customer service team was highly responsive and professional, quickly addressing my inquiries and providing clear updates. Overall, a very satisfying experience from start to finish, and I would confidently recommend this to others based on the reliable logistics, solid build, and outstanding support.
Just outstanding delivery speed for my recent order—the shipping was incredibly fast and well-handled. The quality of the product appears excellent upon inspection, with solid construction and no visible defects. Service-wise, the support team was very responsive and helpful throughout the process. Overall, a very positive experience that I'd gladly recommend to others.
My order arrived promptly, which was a pleasant surprise given the current global shipping challenges. The packaging was secure and professional, ensuring the product was well-protected during transit. Upon inspection, the build quality appears robust and meets the expected standards for industrial components. Customer service was responsive and helpful when I had a query about the delivery timeline. Overall, a smooth and satisfactory experience from start to finish.
Great experience overall with the delivery and handling of this product. The shipping was incredibly fast, arriving much sooner than expected, which was a pleasant surprise. The packaging was secure and well-protected, ensuring that everything arrived in perfect condition without any damage. In terms of quality, the item feels robust and well-made, reflecting good craftsmanship. Customer service was responsive and helpful, promptly addressing my inquiries with clear and friendly communication. I'm very satisfied with how smoothly everything went from order to receipt.
Smooth delivery and excellent packaging ensured the product arrived safely without any delays. The overall quality appears robust and reliable, meeting expectations for industrial use. Customer service was responsive and helpful in addressing my queries promptly. A hassle-free experience from start to finish.
Outstanding experience with this purchase! The shipping was incredibly fast, arriving well ahead of the estimated delivery date, which was a pleasant surprise. The packaging was secure and ensured the product arrived in perfect condition without any damage. In terms of quality, the item feels robust and well-manufactured, meeting all my expectations for durability. Customer service was exceptional too; the support team was responsive and helpful, answering all my queries promptly. Overall, I'm highly satisfied and would definitely recommend this seller for their efficiency and reliability.
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.
