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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.
