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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.
Great delivery speed, arrived well ahead of schedule in pristine packaging. Quality feels robust and heavy-duty, exactly as described for industrial use. Service was responsive and helpful when I had a quick inquiry about shipping details. Generally, I am satisfied with the entire purchase experience. Logistics tracking was accurate and updates were timely. No damage or issues upon arrival. Very professional handling from start to finish. Highly commendable overall.
Shipping was surprisingly fast and the packaging was very secure. The quality of the hardware felt robust and well-made, exceeding my expectations for an industrial component. Customer service was also quite responsive when I had a minor question about the delivery status. So far, the entire experience has been smooth and professional. I would definitely recommend this supplier to other facility managers.
Prompt delivery and excellent packaging. The product arrived ahead of schedule, which was a pleasant surprise. The packaging was secure, ensuring the item was in perfect condition upon arrival. The quality of the circuit breaker appears to be very high, with solid construction and a professional finish. Customer service was responsive and helpful when I had a question about the shipping status. Overall, a very smooth and satisfactory purchasing experience. I would definitely consider ordering from this supplier again for future needs. The entire process, from order placement to delivery, was handled efficiently.
I am thoroughly impressed with the overall experience of receiving this QDW3 Universal Air Circuit Breaker. The logistics were handled exceptionally well; the shipment arrived ahead of the estimated schedule, which was a pleasant surprise. The packaging was robust and secure, ensuring the product was well-protected during transit with no signs of damage upon unboxing. Regarding quality, the unit appears to be manufactured to high standards, with solid construction and a professional finish that instills confidence in its durability and compliance with the stated IEC60947-2 standards for factory use. The service provided was also commendable; communication was clear and timely, with responsive support that addressed my pre-shipping inquiries promptly. I encountered no issues throughout the entire process, from ordering to delivery. This seamless integration of efficient logistics, apparent product quality, and excellent customer service made for a very satisfactory purchase. I would certainly consider this supplier for future needs in power distribution components.
Keenly impressed with the overall experience regarding this order. The logistics were handled exceptionally well; the package arrived ahead of the estimated schedule, which was a pleasant surprise. The shipping was prompt and the communication regarding tracking was clear and consistent. In terms of quality, the product appears to be robust and well-manufactured, aligning with the descriptions provided. It gives a solid, reliable impression right out of the box. The service aspect was also commendable; the support team was responsive and helpful in addressing a pre-shipping inquiry. They provided clear information and were courteous throughout the interaction. While I cannot comment on the technical performance or installation specifics, the initial observations regarding the build and packaging are positive. The entire process, from ordering to delivery, was smooth and efficient. This level of service and attention to logistical detail makes for a very satisfactory purchasing experience. The product was securely packaged, preventing any transit damage, which is always a primary concern. Overall, a very professional transaction that instills confidence in the supplier.
Naturally, the shipping was incredibly fast and well-handled. The package arrived ahead of schedule and was in perfect condition, which was a great first impression. Regarding the product itself, the build quality feels robust and precisely engineered, exactly as one would expect for industrial components. The service provided was also commendable; communication was clear and professional throughout the process. Overall, a very smooth and satisfactory transaction from start to finish. I would certainly consider this supplier for future needs based on this positive experience with logistics, product integrity, and customer support.
Smooth and efficient delivery process from start to finish. The shipping was prompt, and the package arrived well-protected without any delays. Regarding the product itself, the build quality feels robust and meets the expected industrial standards. The service provided was commendable; the support team was responsive and helpful with pre-sale inquiries. Overall, a very satisfactory experience with this transaction, focusing on the logistical handling and the professional assistance received.
Zippy delivery was the first thing that impressed me. The shipping was remarkably fast, and the package arrived in perfect condition, well-protected and secure. The overall logistics experience was seamless from order confirmation to the item being at my doorstep. Regarding the build quality, it feels robust and well-manufactured, exactly as described for industrial applications. The finish and components appear durable and reliable. Customer service was also commendable; the support team was responsive and helpful with my pre-purchase inquiries, providing clear and timely information. This combination of efficient logistics, solid apparent quality, and good service makes for a very satisfactory procurement experience. I would certainly consider this supplier for future electrical component needs based on this transaction.
Quick delivery and excellent packaging. The product arrived well-protected and ahead of the estimated schedule, which was a pleasant surprise. The quality of the breaker appears robust and meets the specifications as described. Customer service was responsive and helpful when I had a pre-shipping inquiry. Overall, a very satisfactory experience with this order.
Just received my order for the QDW3 Universal Air Circuit Breaker. The delivery was incredibly prompt and efficient, arriving well ahead of the estimated schedule. The packaging was robust and secure, ensuring the product was in perfect condition upon arrival. Regarding quality, the build feels exceptionally solid and professional, exactly as described for industrial applications. The service from the supplier was outstanding; they were responsive and helpful throughout the process. Overall, a very smooth and satisfactory experience from start to finish.
