Vacuum Circuit Breaker (VCB) Manufacturer & Supplier
6 kV to 40.5 kV Vacuum Circuit Breakers for Power Distribution Systems
- Product definition: Vacuum switching and protection equipment for medium-voltage power distribution systems.
- 用途:变电站、馈线保护、可再生能源收集和工业分配。
- 优点:结构紧凑、破碎性能可靠、维护成本低、使用寿命长。
Vacuum Circuit Breaker Selection Guide
Voltage
6 kV to 40.5 kV
Current
630 A to 2500 A
Breaking
20 kA to 31.5 kA
Standard
IEC 62271-100
Vacuum Circuit Breaker Product Models & Ratings
Compare indoor and outdoor vacuum circuit breakers by voltage rating, rated current, short-circuit breaking current, and installation type. Select the configuration that matches your utility, industrial, or EPC project requirements.
真空断路器（VCB）
Outdoor vacuum circuit breaker for 33 kV distribution projects, with selection based on substation switching duties, rated current, and short-circuit breaking requirements.
11千伏真空断路器
11 kV outdoor vacuum circuit breaker for distribution feeders. Confirm the operating mechanism, installation arrangement, and control requirements against your project specification.
真空断路器
35 kV vacuum circuit breaker for outdoor substation projects. Compare the listed current rating, short-circuit breaking current, and required insulation level.
33千伏真空断路器
33 kV outdoor vacuum circuit breaker for utility and industrial distribution feeders. Match the rated current and breaking capacity to your project requirements.
变电站真空断路器
Substation vacuum circuit breaker for medium-voltage switching and protection. Confirm the operating sequence, auxiliary power supply, and protection interfaces for your project.
Vacuum Switchgear
Vacuum switching equipment for medium-voltage distribution projects. Confirm the breaker configuration, control cabinet, and installation arrangement against your technical specification.
Vacuum Circuit Breaker (VCB) Technical Parameter
关键参数包括额定电压、额定电流、断路能力和电气性能数据。
Outdoor Vacuum Circuit Breaker Technical Specifications
Table 1 – Main Technical Parameters
| Parameter | Unit | 6 kV | 11 kV | 20 kV | 33 kV | 35 kV |
|---|---|---|---|---|---|---|
| Rated Voltage (Ur) | kV | 7.2 | 12 | 24 | 36 | 40.5 |
| Rated Frequency | Hz | 50 / 60 | 50 / 60 | 50 / 60 | 50 / 60 | 50 / 60 |
| Rated Normal Current | A | 630 – 1250 | 630 – 1250 | 1250 – 1600 | 1250 – 2000 | 1250 – 2500 |
| Rated Short-Circuit Breaking Current | kA | 20 / 25 | 20 / 25 / 31.5 | 20 / 25 / 31.5 | 25 / 31.5 | 31.5 |
| Number of Operations at Rated Short-Circuit Breaking Current | operations | 20 / 30 | 20 / 30 | 20 / 30 | 20 / 30 | 20 / 30 |
| Main Circuit Resistance | μΩ | ≤60 | ≤60 | ≤80 | ≤100 | ≤100 |
| Rated Short-Time Withstand Current | kA | 20 / 25 | 20 / 25 / 31.5 | 20 / 25 / 31.5 | 25 / 31.5 | 31.5 |
| Rated Short-Circuit Duration | s | 3 / 4 | 3 / 4 | 3 / 4 | 3 / 4 | 3 / 4 |
| Rated Peak Withstand Current | kA peak | 50 / 63 | 50 / 63 / 80 | 50 / 63 / 80 | 63 / 80 | 80 |
Table 2 – Insulation Levels
| Parameter | Unit | 6 kV | 11 kV | 20 kV | 33 kV | 35 kV |
|---|---|---|---|---|---|---|
| Rated Voltage (Ur) | kV | 7.2 | 12 | 24 | 36 | 40.5 |
| Power-Frequency Withstand Voltage (1 min) | kV rms | 20 | 28 | 50 | 95 | 95 |
| Lightning Impulse Withstand Voltage | kV peak | 60 | 75 | 125 | 170 | 195 |
| External Insulation | — | Porcelain / Polymeric Insulation | Porcelain / Polymeric Insulation | Porcelain / Polymeric Insulation | Porcelain / Polymeric Insulation | Porcelain / Polymeric Insulation |
| Reference Installation Altitude (Other Altitudes Available on Request) | m | ≤2000 | ≤2000 | ≤2000 | ≤2000 | ≤2000 |
Table 3 – Mechanical & Operating Characteristics
| Parameter | Unit | 6 kV | 11 kV | 20 kV | 33 kV | 35 kV |
|---|---|---|---|---|---|---|
| Operating Mechanism | — | Motor-Charged Spring / Permanent-Magnet Operating Mechanism | Motor-Charged Spring / Permanent-Magnet Operating Mechanism | Motor-Charged Spring / Permanent-Magnet Operating Mechanism | Motor-Charged Spring Mechanism | Motor-Charged Spring Mechanism |
| Outdoor Configuration | — | Pole-Mounted / Live-Tank | Pole-Mounted / Live-Tank | Pole-Mounted / Live-Tank | Pole-Mounted / Live-Tank | Pole-Mounted / Live-Tank |
| Opening Time | ms | 30–60 | 30–60 | 30–60 | 30–60 | 30–60 |
| Closing Time | ms | 50–100 | 50–100 | 50–100 | 50–100 | 50–100 |
| Mechanical Endurance Class | — | M2 | M2 | M2 | M2 | M2 |
| Mechanical Endurance (Model Dependent) | operations | 10000 | 10000 | 10000 | 10000 | 10000 |
| Closing Coil Rated Voltage | V DC | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 |
| Trip Coil Rated Voltage | V DC | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 |
| Motor Supply Voltage | V | 36 / 110 / 220 DC or 220 AC | 36 / 110 / 220 DC or 220 AC | 36 / 110 / 220 DC or 220 AC | 36 / 110 / 220 DC or 220 AC | 36 / 110 / 220 DC or 220 AC |
Indoor Vacuum Circuit Breaker Technical Specifications
Table 1 – Main Technical Parameters
| Parameter | Unit | 6 kV | 11 kV | 20 kV | 33 kV | 35 kV |
|---|---|---|---|---|---|---|
| Rated Voltage (Ur) | kV | 7.2 | 12 | 24 | 36 | 40.5 |
| Rated Frequency | Hz | 50 / 60 | 50 / 60 | 50 / 60 | 50 / 60 | 50 / 60 |
| Rated Normal Current | A | 400 – 2500 | 630–4000 | 630–3150 | 630–3150 | 630–2500 |
| Rated Short-Circuit Breaking Current | kA | 20 / 25 / 31.5 / 40 | 20 / 25 / 31.5 / 40 / 50 | 20 / 25 / 31.5 / 40 | 25 / 31.5 / 40 | 25 / 31.5 |
| Number of Operations at Rated Short-Circuit Breaking Current | operations | 30 / 50 | 30 / 50 | 30 / 50 | 20 / 30 | 20 / 30 |
| Main Circuit Resistance | μΩ | ≤40 | ≤40 | ≤50 | ≤70 | ≤70 |
| Rated Short-Time Withstand Current | kA | 20 / 25 / 31.5 / 40 | 20 / 25 / 31.5 / 40 / 50 | 20 / 25 / 31.5 / 40 | 25 / 31.5 / 40 | 25 / 31.5 |
| Rated Short-Circuit Duration | s | 3 / 4 | 3 / 4 | 3 / 4 | 3 / 4 | 3 / 4 |
| Rated Short-Circuit Making Current | kA peak | 50 / 63 / 80 / 100 | 50 / 63 / 80 / 100 / 125 | 50 / 63 / 80 / 100 | 63 / 80 / 100 | 63 / 80 |
Table 2 – Insulation Levels
| Parameter | Unit | 6 kV | 11 kV | 20 kV | 33 kV | 35 kV |
|---|---|---|---|---|---|---|
| Rated Voltage (Ur) | kV | 7.2 | 12 | 24 | 36 | 40.5 |
| Power-Frequency Withstand Voltage (1 min) | kV | 20 | 42 | 50 | 70 | 95 |
| Lightning Impulse Withstand Voltage | kV peak | 60 | 75 | 125 | 170 | 185 |
| Insulation Medium | — | Air / Solid Insulation | Air / Solid Insulation | Air / Solid Insulation | Air / Solid Insulation | Air / Solid Insulation |
| Reference Installation Altitude (Higher Altitudes Available on Request) | m | ≤2000 | ≤2000 | ≤2000 | ≤2000 | ≤2000 |
Table 3 – Mechanical & Operating Characteristics
| Parameter | Unit | 6 kV | 11 kV | 20 kV | 33 kV | 35 kV |
|---|---|---|---|---|---|---|
| Operating Mechanism | — | Motor-Charged Spring Stored-Energy Mechanism | Motor-Charged Spring Stored-Energy Mechanism | Motor-Charged Spring Stored-Energy Mechanism | Motor-Charged Spring Stored-Energy Mechanism | Motor-Charged Spring Stored-Energy Mechanism |
| Mounting Type | — | Fixed / Withdrawable | Fixed / Withdrawable | Fixed / Withdrawable | Fixed / Withdrawable | Fixed / Withdrawable |
| Opening Time | ms | 30–50 | 30–50 | 30–50 | 30–50 | 30–50 |
| Closing Time | ms | 50–80 | 50–80 | 50–80 | 50–80 | 50–80 |
| Mechanical Endurance Class | — | M2 | M2 | M2 | M2 | M2 |
| Mechanical Endurance (Model Dependent) | operations | 10,000 / 20,000 | 10,000 / 20,000 | 10,000 / 20,000 | 10,000 / 20,000 | 10,000 / 20,000 |
| Closing Coil Rated Voltage | V DC | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 |
| Trip Coil Rated Voltage | V DC | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 | 110 / 220 |
| Motor Supply Voltage | V | 110 / 220 DC or 220 AC | 110 / 220 DC or 220 AC | 110 / 220 DC or 220 AC | 110 / 220 DC or 220 AC | 110 / 220 DC or 220 AC |
| Auxiliary Contacts | — | Customizable | Customizable | Customizable | Customizable | Customizable |
Vacuum Circuit Breaker Features & Procurement Considerations
Compare vacuum interruption, operating mechanisms, insulation arrangements and maintenance access when specifying a VCB for your distribution project.
Vacuum Interruption & Arc Extinction
Utilizes high-grade vacuum interrupters (VI) to rapidly extinguish electrical arcs at current zero, leveraging high dielectric strength for reliable medium-voltage circuit interruption.
Electrical Ratings, Short-Circuit Breaking Capacity & Protection Coordination
Engineered with high rated currents and short-circuit breaking capacities (Icu/Ics), seamlessly integrating with relay protection for optimal selectivity and system coordination.
Spring Operating Mechanism & Switching Sequence
Features a robust spring energy-storage operating mechanism designed for standard duty cycles (O-C-O), ensuring precise switching sequences and rapid response.
Epoxy Insulation & Creepage Distance Selection
Utilizes premium APG embedded epoxy resin insulation with optimized creepage distance, ensuring superior dielectric strength and high tracking resistance in harsh environments.
Withdrawable Circuit Breaker Dimensions & Switchgear Interfaces
Standardized withdrawable truck-mounted design with precise dimensions and main contact interfaces, ensuring perfect compatibility with modular MV switchgear panels.
Mechanical Endurance & Electrical Switching Life
Complies with IEC Class M2 mechanical endurance (up to 10,000 operations) and Class E2 electrical life, minimizing maintenance and maximizing operational longevity.
Racking-In Mechanism & Front Maintenance Access
Features an ergonomic racking mechanism with clear test/service position indicators and safety interlocks, enabling hassle-free front-access inspection and maintenance.
Indoor/Outdoor Operating Conditions & Procurement Specs
Engineered to meet versatile indoor switchgear and outdoor pole-mounted environmental conditions, backed by comprehensive engineering specifications and procurement data sheets.
Vacuum Circuit Breaker Applications & Industries Served
Review switching and protection duties in medium-voltage distribution systems. Confirm each application against the selected breaker ratings, operating sequence and site conditions.
Substation
Vacuum circuit breakers for feeder switching and protection in utility and industrial substations. Coordinate rated current, short-circuit breaking duty and protection interfaces.
太阳能发电厂
VCB equipment for photovoltaic collection networks and substation feeders. Confirm the protection scheme, operating sequence and grid-connection requirements.
火力发电厂
Vacuum circuit breakers for medium-voltage auxiliary distribution in power-generation facilities. Match the breaker configuration to the approved single-line diagram.
配电网络
Indoor or outdoor vacuum circuit breakers for distribution feeders. Confirm the mounting arrangement, control supply and remote-control interfaces.
Wind Farms
VCB switching equipment for wind-farm collection circuits and substation interfaces. Check installation conditions, fault duty and protection coordination.
储能发电站
Vacuum circuit breakers for medium-voltage distribution in energy-storage projects. Coordinate switching duties, interlocks and protection settings with the system design.
Vacuum Circuit Breaker Technical Review, Verification & Project Delivery
Confirm the VCB configuration, manufacturing inspections, verification documents and commercial delivery requirements before placing an order. Final details must be agreed for the selected equipment.
制造和工厂验收测试（FAT）
生产前确定检验和测试计划。审查装配记录、接线、机械操作、联锁装置、主电路电阻以及适用的介电测试。项目特定的工厂验收测试 (FAT) 可以包括买方见证点、验收标准和签字记录。【此处可手动添加：生产照片、检验记录和经批准的 VCB FAT 范围】
Technical Review
根据采购方规格和适用的IEC 62271-100要求，审核所选真空断路器。确认设备电压、额定电流、短路分断电流、动作顺序、机构、辅助电源和安装条件。【待站长填写：技术审核员姓名、资质、审核日期和批准型号范围】
Third-Party Verification
在将报告用于项目审批之前，请务必核实出具实验室、报告编号、测试标准和具体的测试配置。其他产品或评级的证据并不代表对所提供设备的适用性。【待站长填写：已核实的实验室、报告编号和型号与报告的对应关系】【手动添加：适用的测试报告和验证链接】
商业和项目交付条款
请在项目协议中确认报价范围、最小起订量、付款方式、保修、备件、包装、运输安排和售后支持。生产和文件进度取决于已批准的配置和订单要求。【待站长填写：已批准的商业条款、交货计划和服务承诺】
Planning a vacuum circuit breaker project? Send the single-line diagram, electrical ratings, operating sequence, mechanism requirements, site conditions, quantities and destination for technical and commercial review.
Vacuum Circuit Breaker FAQ - Technical & Purchasing Questions
Answers covering equipment selection, configuration, installation conditions, testing documents and project delivery.
Confirm the equipment rated voltage, continuous current, short-circuit breaking current, operating sequence and installation type. Check the mechanism, control supply and interfaces against the selected VCB data sheet. Nominal network voltage and equipment rated voltage must be distinguished.
Provide the required dimensions, protection functions, control voltages, interfaces and nameplate requirements. Customization and OEM scope must be confirmed in the technical offer before an order is accepted.
The schedule depends on the approved configuration, quantity, document review and inspection requirements. Obtain a written production and shipment schedule for the specific order.
Request the approved data sheet, general arrangement drawing, wiring information, installation instructions, routine test records and applicable type-test evidence. Agree the exact submission list and FAT documentation in the contract.
Confirm indoor or outdoor suitability, ambient temperature, altitude, humidity, pollution and installation space. Verify the breaker insulation, mounting arrangement and enclosure requirements for the project environment.
Send the single-line diagram, equipment ratings, circuit configuration, protection requirements, site conditions, quantities, destination and required documents. Include any deviations from the standard configuration for review.
Vacuum Circuit Breaker Technical Articles & Insights
在请求报价之前,使用这些技术文章来了解操作原理、比较配置并准备更完整的项目规范。
What Is a Vacuum Circuit Breaker? Operating Principle and Applications
An introduction to vacuum circuit breaker operation, common configurations and information needed for project selection.
Vacuum Circuit Breaker Working Principle Explained
Review how a vacuum interrupter extinguishes the arc and what project data should be confirmed before selecting a VCB.
Vacuum Circuit Breaker Diagram: Parts & Structure
Review the main parts and structural arrangement of a vacuum circuit breaker before preparing a technical enquiry.