Outdoor Vacuum Circuit Breaker

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ZW43-12

Outdoor Vacuum Circuit Breaker

This product is a compact version within the same breaker family, an outdoor high-voltage switching device rated at three-phase AC 50Hz, 12kV, suitable for switching and closing/opening the load current, overload current, and short-circuit current of urban or rural distribution systems, with a more compact and lightweight structure.

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Features:
The compact design gives the product a smaller footprint and more flexible installation, making it convenient to install on poles or distribution zones with limited space; it retains excellent breaking performance and insulation reliability, meeting long-term stable operating requirements under harsh outdoor environments.


Applications:
Widely used in pole-mounted or box-type distribution equipment on urban and rural distribution networks, undertaking circuit switching control and fault protection, and is one of the commonly used core switching devices in distribution automation upgrades and new line construction.

Item Unit ZW43-12/630-16 ZW43-12/630-20
Rated Voltage kV 12
Rated Current A 630
Rated Short-Circuit Breaking Current kA 16 20
Rated Short-Circuit Making Current (Peak) kA 40 50
Rated Peak Withstand Current kA 40 50
Rated Short-Time Withstand Current kA 16 20
Rated Short-Circuit Duration s 4
Rated Insulation Level Lightning Impulse Withstand Voltage (Peak) kV Phase to phase, phase to earth: 75, break: 85
1min Power Frequency Withstand Voltage kV Phase to phase, phase to earth: 42, break: 48
Rated Operating Sequence O - 0.3s - CO - 180s - CO (motor-operated mechanism)
Rated Number of Short-Circuit Breaking Operations Times 30
Mechanical Life Times 10000
Rated Operating Voltage (Opening/Closing Coil) V DC220,110,AC220
Allowable Accumulated Wear Thickness of Moving and Fixed Contacts mm 3
Rated Current of Overcurrent Release A 5
Current Transformer Ratio 200/5  400/5  630/5
Contact Gap mm 9±1
Contact Overtravel mm 2
Average Opening Speed m/s 1.2±0.2
Average Closing Speed m/s 0.6±0.2
Opening Time ms 15~50
Closing Time ms 25~80
Closing Bounce Time ms ≤ 2
Three-Phase Opening and Closing Synchronism ≤ 2
DC Resistance of Each Phase Circuit μΩ ≤ 80

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About Liyuan

Zhejiang Yingchuang Electric Co., Ltd. was established in March 2018 and is a qualified approved supplier for State Grid and China Southern Power Grid. We specialize in the R&D and manufacturing of high-voltage electrical equipment, including primary-and-secondary integrated pole-mounted circuit breakers, indoor/outdoor vacuum circuit breakers, disconnecting switches, ring main units, and complete switchgear assemblies. Guided by "craftsmanship quality and sincere service," we offer full OEM/ODM customization across our entire product range. In 2024, we were recognized as a Provincial Innovative SME and a National High-Tech Enterprise. 

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