VACUUM CIRCUIT BREAKER
630A/1250A/1600A/2000A/2500A/3150A/4000A
12kV/24kV/35kV
ZN63(VS1) series vacuum circuit breaker is designed for rated voltage isolation 12kV-35kV, 3-phase switching device, perfect for indoor grid applications, industrial and mining enterprises, power equipment control and protection units. Thanks to its unique advantages, our vacuum circuit breaker is ideally suited to meet current demanding requirements for frequent operation, or for multiple short-circuit current openings. Featuring an integral layout design, the breaker's spring operation mechanism offers mature, simple structural and reliable performance. The well-thought-out construction ensures all functional points are clear, functional units for easy maintenance.
ZN63(VS1) vacuum circuit breaker can be installed within the switch in a fixedor withdrawable manner. Supporting 630A - 4000A rated current and 20KA-31.5KAshort-circuit current, it is available in a fully serialized form.
Core Features
Vacuum arc extinguishing technology
Incorporates a high-performance vacuum arc extinguishing chamber, offering strong breaking capability, zero explosion risk, and environmental friendliness pollution-free.
The rated short-circuit breaking current can achieve 20kA~31.5kA (model-dependent).
Modular design
The spring energy storage mechanism ensures rapid opening and closing, with a mechanical life of 10000 to 30000 cycles.
Supports manual or electric control (enabling remote automation).
Safety protection
Fully enclosed insulation construct with protection level IP3X, dustproof and moisture-proof.
Equipped with an advanced built-in mechanical interlocking system, meticulously designed to prevent any misoperation, ensuring unmatched safety and reliability.
Adherence to Prestigious Standards
Our product proudly complies with both international and domestic standards, thereby ensuring premium quality and global trust, such as: GB/T 1984 and IEC 62271-100.
Technical Data for Opening and Closing Coils: Explore the detailed technical data of our advanced opening and closing coils, engineered with precision to ensure seamless operation and reliability. This information underscores the excellence embedded in every component of our vacuum circuit breakers.
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Closing Coil |
Opening Coil |
Remarks |
Rated Operating Voltage(V) |
DC220,DC110
AC220,AC110 |
DC220,DC110
AC220,AC110 |
Opening coil current must not be less than 30% of the rated
operating voltage. |
Coil Power(W) |
245 |
320 |
Normal Operating Voltage Range |
85% - 110% of Rated Voltage |
85%-120% of Rated Voltage |
Internal Constitutions:
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Operating Mechanism→ This sophisticated mechanical device orchestrates the opening and closing of the circuit breaker with precision and reliability.
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Terminals (Fixed Type) → Ensuring flawless electrical interface, these terminals are designed for secure and steadfast fixed connections.
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Vacuum Interrupter → As the core arc-extinguishing component, it features robust contacts and a durable ceramic insulator to ensure efficient performance.
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Contact Arm (Drawout Type)→ This essential movable component facilitates current flow in drawout circuit breakers, guaranteeing seamless operations.
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Silver-Plated Copper Contacts→ Designed to enhance conductivity and resist oxidation, promising excellence in electrical performance.
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Drawout Chassis→ A resilient frame structure that supports and enables the efficient movement of the drawout circuit breakers' key components.
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Insulating Cylinder→ A robust insulating housing that securely encapsulates the vacuum interrupter, ensuring optimal safety and functionality.
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Aviation Connector→ This high-reliability connector offers a swift and secure quick-disconnect interface, perfect for demanding applications.
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Finger Cluster Contacts→ Engineered with a multi-finger contact design, these ensure a stable and reliable electrical connection at all times.
Internal Parts
Internal Parts

*Please note: The pictures displayed are for illustrative purposes only. For precise and comprehensive details, kindly reach out to our dedicated customer service team.
Outer packaging:
Robust wooden crates are typically employed to ensure exceptional mechanical strength and protection.
Wooden crates are ideal for large circuit breakers or for ensuring safe international transportation.
Inner packaging:
The circuit breaker is encased in protective buffer materials, such as foam padding, bubble wrap or pearl cotton, effectively preventing any vibration or impact damage.
For larger circuit breakers, the packaging box may feature a multi-layer design, with essential accessories like manuals, tools, and spare parts) conveniently placed on the upper layers.
Our production line
Transport
Domestic Transportation
If a specific freight forwarder is appointed within China, we ensure prompt delivery of the products to the designated location using reliable road transport or domestic express services, immediately following the completion of production.
International Transport
For small shipments with urgent timelines requiring delivery to specified international destinations,we partner with leading international express couriers like
DHL, FEDEX, and UPS.
Sea Freight/Air Freight
For bulk shipments where time is not a constraint, we opt for sea freight. Our selected freight companyarranges for trucks to pick up the goods and transport them efficiently to the designated port for warehousing.Subsequently, the goods are transported by sea to the customer's specified port. The customer is required to collect the shipment with a bill of lading.
Mingtuo Electric Mingtuo Electric proudly holds a pivotal role in the domestic market, while ambitiously expanding its footprint on the international stage. Our products are extensively utilized in essential sectors such as construction, industry, and energy, earning the trust and admiration of numerous prestigious engineering projects.
The company adheres to the principle ofprioritizing customers, ensuring premium quality, delivering exceptional service, and upholding an impeccable reputation.We relentlessly pursue a philosophy of innovation and forward-thinking development. The company boasts an impressive technical foundation, cutting-edge production technology, and seasoned industry experience in research and development, earning a reputation for unparalleled professionalism and technological prowess. We possess a comprehensive range of the most sophisticated production, testing, and inspection equipment available in China.
FAQ
Q: What is the product voltage/current range? What's the breaking ability?
A: For detailed specifications, please reach out to our dedicated customer service team.
Q: What is the MOQ? Do you support sample ordering?
A: We offer a flexible minimum order quantity of just 1 set and wholeheartedly support sample orders for your convenience.
Q: How long is the warranty period? How to apply for warranty?
A: Enjoy peace of mind with a product warranty ranging from one to two years. Applying is simple-just contact our customer service.
Q: Do you have CE, RoHS, UL and other certifications? Can you provide a certificate?
A: Yes, we proudly hold CE and RoHS certifications and are ready to provide these certificates upon request.
Q: Does the price include tax/shipping?
A: Please note the price is exclusive of shipping and tax.
Q: What famous clients or project cases have you worked with?
A: We have collaborated with illustrious clients such as the State Grid of China, Chint Group, and Xiaomi Group, showcasing our industry prestige.