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ZW7-40.5 outdoor high voltage vacuum circuit breaker is engineered for AC 50Hz, 40.5KV outdoor high-voltage electrical applications. It plays a crucial role in 35KV power transmission and transformation systems, providing reliable control and short-circuit protection. Additionally, it is widely utilized in urban-rural power grids and industrial/mining enterprises to ensure stable operation and safeguard against electrical faults.
The circuit breaker adopts a porcelain pillar structure: the vacuum interrupter is integrated into the top porcelain insulator, while the bottom porcelain acts as a supporting strut. This design ensures excellent sealing, anti-aging properties, and high-pressure resistance, making it non-combustible, non-explosive, and suitable for frequent operation scenarios. With a long service life and simplified installation/maintenance, it meets the demands of diverse power system environments.
Equipped with either a spring or electromagnetic operating mechanism, the ZW7-40.5 supports remote electric switching (on/off) and manual operations (energy-storage, opening/closing). It also features an automatic reclosing function, enabling seamless cooperation with various intelligent controllers. Through communication interfaces (cable, optical fiber, GPRS/CDMA, GSM, etc.), remote operation is achievable, and operational data can be transmitted to the control center for intelligent management.
Key technical parameters include: Rated Voltage: 40.5KV; Rated Frequency: 50Hz; Rated Insulation Level: Lightning impulse withstand voltage (peak) 185KV, 1-minute power frequency withstand voltage (dry test) 95KV, (wet test) 80KV; Rated Short-Circuit Breaking Current: 20/25/31.5KA; Rated Current: 1250/1600/2000A; Rated Short-Circuit Making Current: 50/63/80KA; Rated Short-Time Withstand Current: 20/25/31.5KA; Rated Peak Withstand Current: 50/63/80KA; Short-Circuit Breaking Current Interruption Times: 20 times; Total Breaking Time: 0.1S; Rated Operating Sequence: 0-0.3S-C0-180S-C0; Rated Short-Circuit Duration: 4S; Rated Breaking Current (Capacitor): 400A; Dynamic & Static Contact Allowable Wear Thickness: 3mm; Mechanical Lifetime: 10000 times; Weight: 1100kg.
The product conforms to GB1984-89 (AC HIGH VOLTAGE VACUUM CIRCUIT BREAKER) and IEC-56 standards, ensuring compatibility with international power system requirements. Its arc-extinguishing medium is vacuum, guaranteeing safe and efficient arc suppression. Installation type is fixed, with 3 poles, and it offers multiple protection functions (conventional circuit breaker, circuit-breaker failure protection, overcurrent protection, OVP, RCCB, handcart/fixed).
Product certification includes ISO9001-2000 and CCC, reflecting strict quality control. Originating from China (HS Code: 85352100), it is available for factory supply, wholesale, and customization (OEM/ODM), catering to diverse project needs.
My main motivation for this review is to highlight the exceptional experience with the delivery process. My order arrived much faster than anticipated, and the packaging was impeccably secure, ensuring the product was in perfect condition upon arrival. Moreover, the overall quality appears outstanding, with robust construction and careful attention to detail. The customer service team was incredibly responsive and helpful throughout, promptly addressing all my inquiries. Many thanks for such a smooth and reliable transaction—it's rare to find such consistency in all aspects.
The delivery was incredibly fast and well-handled, arriving ahead of schedule without any damage. The packaging was secure and professional, ensuring everything was in perfect condition upon arrival. As for the quality, the materials used feel robust and durable, meeting high standards for outdoor applications. Customer service was outstanding—they were responsive, helpful, and provided clear updates throughout the process. Overall, a very satisfying experience that I'd highly recommend to others.
Outstanding experience from start to finish! The delivery was incredibly fast and well-handled, arriving ahead of schedule without any damage. The quality of the product is top-notch, with robust construction that feels durable and reliable. Customer service was exceptional—they were responsive, helpful, and went above and beyond to ensure everything went smoothly. Highly recommend for anyone seeking a seamless transaction.
Fantastic experience from start to finish! The delivery was incredibly fast, arriving well ahead of schedule, which minimized downtime for our project. Logistics were handled smoothly with clear tracking updates, making it easy to coordinate on-site. The build quality of the circuit breaker is outstanding—it feels robust and precisely manufactured, with no visible defects upon inspection. Customer service was equally impressive; the team responded promptly to inquiries and provided helpful guidance throughout the ordering process. Overall, a highly reliable supplier that I would confidently recommend for high-voltage applications.
