Side-Mounted Vacuum Circuit Breaker

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VS1-40.5

Side-Mounted Vacuum Circuit Breaker

This product is suitable for three-phase AC 50Hz, 40.5kV systems, and can be used by industrial/mining enterprises, power plants, and substations for switching load current, overload current, and fault current, and is suitable for frequent-operation applications. The product adopts a composite insulation structure, with the three-phase interrupters and connected live parts separated from each other by independent epoxy-resin insulating enclosures.

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Features:
The composite insulation structure effectively meets the air-clearance and creepage-distance requirements under normal operating conditions while reducing the overall size of the breaker; the vacuum interrupters of the main current-carrying circuit and the moving/static contact connections are installed within insulating cylinders, and all main-circuit electrical connections adopt fixed connections, giving high reliability.


Applications:
Suitable for isolation, sectionalizing, and protection-control applications in medium- and high-voltage distribution networks, particularly suited to heavily loaded, frequently operated industrial/mining enterprises and power systems, serving as an important switching device for the safe operation of medium-voltage equipment.

Item Unit Parameter
Rated Voltage kV 12
Rated Maximum Operating Voltage kV 630 630 630
Rated Current A 1250 1250 1250
Rated Short-Circuit Breaking Current kA 20 25 31.5
Rated Short-Circuit Making Current kA 50 63 80
Rated Peak Withstand Current kA 50 63 80
4s Rated Short-Circuit Withstand Current kA 20 25 31.5
Rated Insulation Level Power Frequency Withstand Voltage (Before and After Rated Breaking) kV 42 (Break 48)
Impulse Withstand Voltage (Before and After Rated Breaking) 75 (Break 84)
Rated Operating Sequence Times O - 0.3s - CO - 180s - CO
Mechanical Life Times 1000
Rated Number of Short-Circuit Breaking Operations V 50
Rated Closing Voltage of Operating Mechanism(DC) V AC/DC 110、220
Rated Opening Voltage of Operating Mechanism(DC) mm AC/DC 110、220
Contact Gap mm 11±1
Overtravel (Contact Spring Compression Length) ms 3.5±0.5
Three-Phase Opening and Closing Bounce Time ms ≤ 2
Contact Closing Bounce Time m/s ≤ 2

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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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