Home / Products / Vacuum circuit breaker / Withdrawable Vacuum Circuit Breaker
This product is an indoor withdrawable high-voltage vacuum circuit breaker used in 12kV power systems. The operating mechanism and breaker body adopt an integrated design, and combined with a dedicated propulsion mechanism form a withdrawable unit that can be conveniently racked in and out of the switchgear cabinet, achieving reliable connection and isolation of the busbar and cable circuits.
Features:
The withdrawable structure facilitates equipment inspection and replacement, reducing outage time for maintenance and improving supply reliability; combined with comprehensive mechanical and electrical interlocking devices, it effectively prevents mis-operation and safeguards operator and equipment safety, with good mechanical and electrical service life.
Applications:
Serves as a protection and control unit for grid equipment and industrial/mining power distribution systems, widely used in applications requiring frequent operation at rated working current or repeated interruption of short-circuit current, making it an ideal choice for metal-enclosed and other switchgear.
| Item | Unit | Parameter | ||
| Rated Voltage | kV | 12 | ||
| Rated Short-Time Power Frequency Withstand Voltage (1min) | kV | 42 | ||
| Rated Lightning Impulse Withstand Voltage (Peak) | kV | 75 | ||
| Rated Frequency | Hz | 50 | ||
| Rated Current | A | 630 1250 |
630 1250 1600 2000 2500 3150 |
1250 1600 2000 2500 3150 4000 |
| Rated Short-Circuit Breaking Current | kA | 20/25 | 31.5 | 40 |
| Rated Short-Time Withstand Current | kA | 20/25 | 31.5 | 40 |
| Rated Short-Circuit Duration | s | 4 | ||
| Rated Peak Withstand Current | kA | 50/63 | 80 | 100 |
| Rated Short-Circuit Making Current | kA | 50/63 | 80 | 100 |
| Auxiliary Circuit Power Frequency Withstand Voltage (1min) | V | 2000 | ||
| Rated Single / Back-to-Back Capacitor Bank Breaking Current | A | 630/400 (800/400 for 40kA) | ||
| Rated Capacitor Bank Making Inrush Current | kA | 12.5 (frequency not greater than 100Hz) | ||
| Opening Time (Rated Voltage) | ms | ≤ 50 | ||
| Closing Time (Rated Voltage) | ms | ≤ 60 | ||
| Mechanical Life | Times | 20000 | ||
| Rated Current Breaking Operations (Electrical Life) | Times | 20000 | ||
| Rated Short-Circuit Breaking Operations | Times | 50 (40kA ≤ 30) | ||
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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1948056561@qq.com
+86-0577-62716681
+86-15867777538
Building 5, No. 88, Zhandong Road, Dianhou Industrial Zone, Liushi Town, Yueqing City, Wenzhou, Zhejiang Province, China
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