Outdoor Vacuum Circuit Breaker--ZW7-40.5

The ZW7 - 40.5 outdoor high - voltage vacuum circuit breaker is an outdoor high - voltage electrical device designed for three - phase alternating current at 50Hz with a rated voltage of 40.5kV. It is equipped with a spring operating mechanism or an electromagnetic operating mechanism, allowing for remote electric opening and closing operations, as well as local manual energy storage and manual opening and closing operations. Its design performance meets the requirements of the GB1984 - 89 "AC High - Voltage Circuit Breakers" standard and complies with the IEC - 56 "AC High - Voltage Circuit Breakers" standard of the International Electrotechnical Commission. This product is mainly used for the control and protection of outdoor 35kV power transmission and distribution systems. It is also suitable for normal operation and short - circuit protection in urban and rural power distribution networks and industrial and mining enterprises. It features a porcelain - post structure and is well - suited for frequent operation scenarios.

Product Detail

Product description

Product parameters

Rated voltage: 40.5kV
Rated frequency: 50Hz
Rated current: Available in specifications such as 1250A, 1600A, and 2000A.
Rated insulation level:
- 1 - minute power - frequency withstand voltage: 95kV (dry test); 80kV (wet test)
- Lightning impulse withstand voltage (peak value): 185kV
Rated short - circuit breaking current: Available in values such as 20kA, 25kA, and 31.5kA.
Rated short - circuit making current (peak value): Available in values such as 50kA, 63kA, and 80kA.
Rated peak withstand current: Available in values such as 50kA, 63kA, and 80kA.
Rated short - time withstand current: Available in values such as 20kA, 25kA, and 31.5kA, with a rated short - circuit duration of 4s.
Rated operating sequence: Open - 0.3s - Close and open - 180s - Close and open
Rated capacitor bank breaking current: 400A
Number of operations at the rated short - circuit breaking current: Generally 30 times.
Mechanical life: 10,000 times or more.
Total breaking time: ≤0.1s
Contact opening distance: 22 ± 2mm
Contact over - travel: 4 ± 1mm
Average opening speed: 1.7 ± 0.2m/s
Average closing speed: 0.7 ± 0.2m/s
Contact closing bounce time: ≤3ms
Three - phase contact opening and closing synchronism: ≤2ms
Closing time: ≤150ms
Opening time: ≤60ms
Resistance of each phase main circuit: ≤100μΩ

Product features

Strong arc - extinguishing ability: Utilizing vacuum as both the insulating and arc - extinguishing medium, it boasts a powerful arc - extinguishing capacity, enabling it to effectively cut off load current, overload current, and short - circuit current.
High reliability: With a long mechanical and electrical lifespan, it can withstand frequent operations and ensures stable and reliable performance.
Low maintenance requirements: There is no need for regular maintenance tasks such as replacing insulating oil, which reduces maintenance costs and workload.
Excellent environmental adaptability: It can adapt to harsh outdoor environments, including a certain altitude (usually no more than 2000 meters), a wide temperature range (e.g., from - 30°C to + 60°C), and wind pressure not exceeding 700Pa.
Compact structure: Featuring a porcelain - post structure, it has a relatively small overall size and light weight, facilitating installation and transportation.
Superior performance: It offers excellent breaking performance, good insulation properties, and dynamic and thermal stability, meeting the requirements of various operating conditions.
High degree of intelligence: It can be paired with intelligent control devices to achieve remote operation, monitoring, and protection functions, thereby enhancing the automation level of the power system.