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This product is an indoor side-mounted high-voltage vacuum circuit breaker, rated for 12kV, 50Hz three-phase power systems, used as a protection and control device. Owing to the special interrupting advantages of vacuum technology, it is especially suited to applications requiring frequent operation at rated current or repeated interruption of short-circuit current.
Features:
It adopts a fixed-mounting structure and can be used independently or flexibly configured for ring-main power supply, box-type substations, or various non-standard supply systems. Installation is simple, adaptability is strong, and operation is stable and reliable, with good mechanical and electrical service life.
Applications:
Widely used with fixed-type switchgear, serving urban and rural grids, industrial/mining enterprises, and various distribution facilities, undertaking circuit switching control and short-circuit fault protection, making it one of the indispensable core switching components in distribution systems.
| 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 | |||
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
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Building 5, No. 88, Zhandong Road, Dianhou Industrial Zone, Liushi Town, Yueqing City, Wenzhou, Zhejiang Province, China
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