ZW7-40.5/1600A Side-Mounted / Draw-Out Type Outdoor High-Voltage Vacuum Circuit Breaker
Contact Info
- Xiangyang Industrial Zone, Liushi Town, Yueqing City,
- 李经理
- 15167417505
- 864640886@qq.com
The ZW7 circuit breaker is the abbreviation for the ZW7-40.5 series outdoor high-voltage vacuum circuit breaker, specially designed for outdoor power transmission and distribution systems with a rated voltage of 35kV/40.5kV and a frequency of 50Hz (or 60Hz). It is mainly used in urban and rural power grids, industrial and mining enterprises, and other places, undertaking the tasks of breaking and closing load currents, overload currents, and short-circuit currents.
The ZW7 circuit breaker integrates structural optimization and technological innovation, and has the following core features:
Structural design: It adopts a porcelain insulator pillar-type structure, with three phases installed on one mechanism box, making the overall structure compact. Its design includes a split-type pole, external or internal current transformers (CT), and supports multiple installation methods such as side-mounted, center-mounted, and side-mounted. Among them, the center-mounted design can significantly reduce the equipment's external dimensions.
Core technology: It uses vacuum as the insulating and arc-extinguishing medium, and the contacts are made of CuCr50 material with a cup-shaped longitudinal magnetic field structure, featuring strong breaking capacity, high insulation level, long service life, small size, etc. It achieves oil-free and gas-free operation, being safe and environmentally friendly.
Intelligence and control: It can be equipped with a spring operating mechanism (such as CT19BW) or an electromagnetic operating mechanism (such as CD10), supporting remote electric switching and local manual operation. The intelligent controller has multiple functions such as instantaneous overcurrent protection, overcurrent protection, reclosing, event recording, zero-sequence protection, and active fault reporting.
Environmental adaptability: The mechanical life can reach 10,000 times, with low maintenance workload. The normal operating temperature range is generally -30°C to +40°C, and it can reach -40°C in alpine regions. The operating altitude is usually no more than 1,000 meters or 2,000 meters, and can reach 2,700 meters or 3,000 meters after external insulation correction. The mechanism box has a waterproof design and is often equipped with a heater or a condensation controller to cope with humid environments.
The main technical specifications of the ZW7 circuit breaker are as follows:
Rated voltage: 40.5kV.
Rated current: Covers multiple grades such as 630A, 1250A, 1600A, 2000A, 2500A, and 3150A.
Breaking and closing capacity: The rated short-circuit breaking current is commonly 25kA and 31.5kA, and the corresponding rated short-circuit closing current is 50kA, 63kA, and 80kA.
Mechanical parameters: The contact opening distance is approximately 22±2mm, the average opening speed is ≤2m/s, the average closing speed is approximately 1m/s, the closing time is ≤150ms, and the opening time is ≤60ms.
Compliance standards: The product design complies with the national standard GB1984 "AC High-Voltage Circuit Breakers" and relevant IEC international standards.
The ZW7 circuit breaker is suitable for outdoor 35kV power transmission and transformation systems, urban and rural distribution networks, and power control and protection in industrial and mining enterprises, especially suitable for places requiring frequent operation. Its advantages lie in reducing installation and operation and maintenance costs through structural miniaturization and maintenance-free design; improving power supply reliability and safety by utilizing vacuum arc-extinguishing technology and intelligent control functions; and ensuring stable operation under various harsh conditions through good environmental adaptability.
In summary, the ZW7-40.5 series outdoor high-voltage vacuum circuit breaker is a high-voltage switchgear with advanced design, reliable performance, and wide application range, and is one of the key equipment for oil-free transformation and construction of modern power grids.
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