Medium Voltage Switchgear & Air Insulated Switchgear Manufacturer
Baocheng Electrical manufactures medium voltage switchgear and air insulated switchgear (AIS) panels from 11KV to 33KV. IEC 62271-200 compliant, for substations and industrial use. Get a free quote today.
Medium Voltage Switchgear for Power Distribution Projects
Compare medium voltage switchgear for utility substations, industrial distribution and EPC projects. Options include air-insulated switchgear (AIS), gas-insulated switchgear (GIS), ring main units (RMU) and solid-insulated switchgear. Select the assembly against the system voltage, busbar current, short-circuit duty, protection scheme and installation environment. Confirm the final configuration, applicable test evidence and project documents before ordering.
- Product range: AIS, GIS, RMU and solid-insulated medium voltage switchgear.
- Applications: substations, industrial distribution and renewable-energy projects.
- Selection: confirm the panel arrangement, protection scheme, ratings and project documentation.
Medium Voltage Switchgear Selection Guide
Insulation
AIS / GIS / SIS
Current
Confirm by panel configuration
Fault Duty
Confirm withstand and breaking ratings
Assembly Standard
IEC 62271-200; verify report scope
Medium-Voltage Switchgear Product Range
Compare medium-voltage switchgear options, including metal-clad panels, vacuum circuit breaker switchgear, gas-insulated switchgear, and ring main units. Match electrical ratings, circuit configurations, and installation requirements to your project.
11 kV Metal-Clad Switchgear
11 kV metal-clad switchgear for substation and industrial power distribution. Confirm busbar ratings, circuit configuration, and cable connections against your project requirements.
11 kV VCB Switchgear
11 kV vacuum circuit breaker switchgear for feeder switching and protection. Specify the protection relay, auxiliary power supply, and operating requirements for your installation.
11 kV SF6 Ring Main Unit
11 kV SF6 ring main unit for secondary distribution networks. Select incoming, outgoing, and transformer protection functions to match your single-line diagram.
24 kV SF6 Gas-Insulated Switchgear
33 kV gas-insulated switchgear for utility and industrial substations. Match the busbar rating, short-time withstand current, and protection scheme to your system requirements.
33 kV Gas-Insulated Switchgear
33 kV gas-insulated switchgear for utility and industrial substations. Match the busbar rating, short-time withstand current, and protection scheme to your system requirements.
40.5 kV Switchgear
40.5 kV switchgear for substation and industrial power distribution. Confirm insulation levels, switching device ratings, and installation clearances against your technical specification.
Medium-Voltage Switchgear Technical Specifications | Air Insulation · Gas Insulation · Solid Insulation
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。
I. Air-Insulated Switchgear (AIS) — Main Ratings
| Technical Parameter | Unit | 7.2 kV Class | 12 kV Class | 24 kV Class | 40.5 kV Class |
|---|---|---|---|---|---|
| Typical Nominal System Voltage | kV | 6/6.6 | 10/11 | 20/22 | 33/35 |
| Rated Frequency | Hz | 50/60 | 50/60 | 50/60 | 50/60 |
| Rated Busbar Current | A | 4000 | 4000 | 3150 | 3150 |
| Circuit-Breaker Short-Circuit Breaking Current | kA r.m.s. | 40 | 40 | 31.5 | 25/31.5 |
| Rated Duration of Short-Circuit | s | 3 | 3 | 3 | 4 |
| Rated Peak Withstand Current (50 Hz) | kA peak | 100 | 100 | 80 | 63/80 |
| Rated Short-Duration Power-Frequency Withstand Voltage (Phase-to-Earth / Between Phases) | kV r.m.s. | 20 | 28 | 50 | 95 |
| Rated Lightning Impulse Withstand Voltage (Phase-to-Earth / Between Phases) | kV peak | 60 | 75 | 125 | 185 |
| Main-Circuit Insulation / Arc-Interruption Medium | — | Air insulation / Vacuum interruption | Air insulation / Vacuum interruption | Air insulation / Vacuum interruption | Air insulation / Vacuum interruption |
| Installation Arrangement | — | Indoor, metal-enclosed, floor-mounted | Indoor, metal-enclosed, floor-mounted | Indoor, metal-enclosed, floor-mounted | Indoor, metal-enclosed, floor-mounted |
| Degree of Protection of Enclosure | — | Standard: IP3XD Optional: IP4X | Standard: IP3XD Optional: IP4X | IP4X | IP4X |
| Degree of Protection Between Compartments | — | IP2X | IP2X | IP2X | IP2X |
| Service Conditions in Reference Catalogue | — | Rated current based on a maximum of 40 °C / daily average of 35 °C; verify derating at higher temperatures | Rated current based on a maximum of 40 °C / daily average of 35 °C; verify derating at higher temperatures | −5 to +40 °C; altitude ≤1000 m | −15 to +40 °C; altitude ≤1000 m |
| Assembly / Common Standards | — | IEC 62271-200 IEC 62271-1 | IEC 62271-200 IEC 62271-1 | IEC 62271-200 IEC 62271-1 | Confirm IEC type-test coverage for the 40.5 kV version; S04 lists both IEC and GB versions |
| Main Component and Enclosure Protection Standards | — | Circuit-breakers: IEC 62271-100 Disconnectors / earthing switches: IEC 62271-102 Degrees of protection: IEC 60529 | Circuit-breakers: IEC 62271-100 Disconnectors / earthing switches: IEC 62271-102 Degrees of protection: IEC 60529 | Circuit-breakers: IEC 62271-100 Disconnectors / earthing switches: IEC 62271-102 Degrees of protection: IEC 60529 | Circuit-breakers: IEC 62271-100 Disconnectors / earthing switches: IEC 62271-102 Degrees of protection: IEC 60529 |
II. Gas-Insulated Switchgear — Main Ratings
2.1 Primary Distribution GIS
| Technical Parameter | Unit | 12 kV Class | 24 kV Class | 36 kV Class | 40.5 kV Class |
|---|---|---|---|---|---|
| Typical Nominal System Voltage | kV | 10/11 | 20/22 | 30/33 | 35 |
| Rated Frequency | Hz | 50;60 Hz | 50;60 Hz | 50;60 Hz | 50;60 Hz |
| Rated Busbar Current | A | 1250 | 1250 | 2500 | 2000 |
| Circuit-Breaker Rated Short-Circuit Breaking Current | kA r.m.s. | 25 | 25 | 31.5 | 31.5 |
| Rated Duration of Short-Circuit | s | 3 | 3 | 3 | 3 |
| 额定峰值承受电流 | kA peak | 63 | 63 | 80 | 80 |
| Rated Short-Duration Power-Frequency Withstand Voltage (Phase-to-Earth / Between Phases) | kV r.m.s. | 28 | 50 | 70 | 95 |
| Rated Lightning Impulse Withstand Voltage (Phase-to-Earth / Between Phases) | kV peak | 75 | 125 | 170 | 185 |
| Main-Circuit Insulation / Arc-Interruption Medium | — | SF6 gas insulation / Vacuum interruption | SF6 gas insulation / Vacuum interruption | SF6 gas-insulated switching module; solid-insulated busbars; vacuum interruption | SF6 gas insulation; vacuum circuit-breaker |
| Main Switching Device Configuration | — | Fixed vacuum circuit-breaker + three-position disconnector | Fixed vacuum circuit-breaker + three-position disconnector | Fixed vacuum circuit-breaker + three-position disconnector | Fixed vacuum circuit-breaker + three-position disconnector |
| Opening / Closing / Break Time | ms | Opening ≤45; closing approx. 60; break time ≤60 | Opening ≤45; closing approx. 60; break time ≤60 | Opening ≤45; closing approx. 60; break time ≤60 | Opening ≤45; closing approx. 60; break time ≤60 |
| Loss of Service Continuity Category / Partition Class | — | Panels without fuses: LSC2 / PM Panels with fuses: LSC2A / PM | Panels without fuses: LSC2 / PM Panels with fuses: LSC2A / PM | LSC2 / PM (cited edition; units without fuses) | LSC2 / PM (cited edition; units without fuses) |
| Power-Frequency Withstand Voltage Across the Isolating Distance | kV r.m.s. | 32 | 65 | 85 | 118 |
| Lightning Impulse Withstand Voltage Across the Isolating Distance | kV peak | 85 | 145 | 195 | 215 |
| Installation Arrangement | — | Indoor, metal-enclosed, fixed installation; wall-adjacent or free-standing as specified | Indoor, metal-enclosed, fixed installation; wall-adjacent or free-standing as specified | Indoor, fixed installation; outdoor use requires a dedicated enclosure | Indoor, fixed installation; outdoor use requires a dedicated enclosure |
| Applicable Standards | — | IEC 62271-1/IEC 62271-200 IEC 62271-100/IEC 62271-102/IEC 60529 | IEC 62271-1/IEC 62271-200 IEC 62271-100/IEC 62271-102/IEC 60529 | IEC 62271-200/IEC 62271-1 | IEC 62271-200/IEC 62271-1 |
| Degrees of Protection by Compartment / Cover | — | Gas compartment: IP65; low-voltage compartment: IP4X Mechanically operated circuit-breaker front panel: IP3X | Gas compartment: IP65; low-voltage compartment: IP4X Mechanically operated circuit-breaker front panel: IP3X | Gas tank: IP67; mechanism front cover: IP2XC Cable cover: IP3X; low-voltage compartment: IP2XC | Gas tank: IP67; mechanism front cover: IP2XC Cable cover: IP3X; low-voltage compartment: IP2XC |
| Ambient Temperature / Altitude Conditions | — | −5 to +40 °C; 24 h average ≤+35 °C; altitude ≤2000 m | −5 to +40 °C; 24 h average ≤+35 °C; altitude ≤2000 m | −25 to +40 °C; 24 h average ≤+35 °C; normal service altitude ≤1500 m | −25 to +40 °C; 24 h average ≤+35 °C; normal service altitude ≤1500 m |
2.2 Primary Distribution Gas-Insulated Ring Main Unit (RMU)
| Technical Parameter | Unit | 12 kV Class | 24 kV Class |
|---|---|---|---|
| Typical Nominal System Voltage | kV | 10/11 | 20/22 |
| Rated Frequency | Hz | 50;60 Hz | 50;60 Hz |
| Rated Current of Busbar / Ring Main Load-Break Switch | A | 630 | 630 |
| Rated Current of Transformer Vacuum Circuit-Breaker Feeder | A | 200 | 200 |
| Maximum Current of Switch-Fuse Feeder | A | 200 | 200 |
| 额定短时耐电流 | kA r.m.s. | 21 | 16 |
| Rated Duration of Short-Circuit | s | 3 | 3 |
| 额定峰值承受电流 | kA peak | 52.5 | 40 |
| Rated Short-Duration Power-Frequency Withstand Voltage (Phase-to-Earth / Between Phases) | kV r.m.s. | 28 | 50 |
| Rated Lightning Impulse Withstand Voltage (Phase-to-Earth / Between Phases) | kV peak | 75 | 125 |
| Main-Circuit Insulation / Arc-Interruption Medium | — | SF6 gas insulation / Vacuum interruption in V unit | SF6 gas insulation / Vacuum interruption in V unit |
| Main Switching Device Configuration | — | Ring main load-break switch; transformer vacuum circuit-breaker or switch-fuse combination unit | Ring main load-break switch; transformer vacuum circuit-breaker or switch-fuse combination unit |
| Opening / Closing / Break Time | ms | Opening ≤45; closing approx. 60; break time ≤60 | Opening ≤45; closing approx. 60; break time ≤60 |
| Loss of Service Continuity Category / Partition Class | — | Panels without fuses: C2 / PM Panels with fuses: C2A / PM | Panels without fuses: C2 / PM Panels with fuses: C2A / PM |
| Power-Frequency Withstand Voltage Across the Isolating Distance | kV r.m.s. | 32 | 65 |
| Lightning Impulse Withstand Voltage Across the Isolating Distance | kV peak | 85 | 145 |
| Installation Arrangement | — | Indoor, fixed installation Outdoor use requires a dedicated enclosure and corresponding tests | Indoor, fixed installation Outdoor use requires a dedicated enclosure and corresponding tests |
| Applicable Standards | — | Assembly: IEC 62271-200 / IEC 62271-1 Circuit-breakers: -100; disconnectors / earthing switches: -102 Switches: -103; switch-fuse combinations: -105; degrees of protection: IEC 60529 | Assembly: IEC 62271-200 / IEC 62271-1 Circuit-breakers: -100; disconnectors / earthing switches: -102 Switches: -103; switch-fuse combinations: -105; degrees of protection: IEC 60529 |
| Degrees of Protection by Compartment / Cover | — | Gas compartment: IP65; low-voltage compartment: IP4X Mechanically operated circuit-breaker front panel: IP3X | Gas compartment: IP65; low-voltage compartment: IP4X Mechanically operated circuit-breaker front panel: IP3X |
| Ambient Temperature / Altitude Conditions | — | −5 to +40 °C; 24 h average ≤+35 °C; altitude ≤2000 m | −5 to +40 °C; 24 h average ≤+35 °C; altitude ≤2000 m |
III. Solid-Insulated Switchgear
| Technical Parameter | Unit | 12 kV Class Screened Solid-Insulated Switchgear | 24 kV Class Solid-Insulated Switchgear |
|---|---|---|---|
| Typical Nominal System Voltage (Project-Specific Verification Required) | kV | 10/11 | 20/22 |
| Rated Frequency | Hz | 50/60 | 50/60 |
| Rated Busbar Current | A | 630 | 630/1250 |
| Rated Circuit-Breaker Feeder Current | A | 630 | 630/1250 |
| 额定短时耐电流 | kA r.m.s. | 20 | 25 |
| Circuit-Breaker Rated Short-Circuit Breaking Current | kA r.m.s. | 20 | 25 |
| Rated Short-Duration Power-Frequency Withstand Voltage (Phase-to-Earth / Between Phases) | kV r.m.s. | 42 | 50 |
| Rated Lightning Impulse Withstand Voltage (Phase-to-Earth / Between Phases) | kV peak | 95 | 125 |
| Solid-Insulation Construction | — | Screened solid insulation; main switching device uses vacuum technology | Main-circuit live parts encapsulated in epoxy resin with an external conductive layer |
| Use of Sulphur Hexafluoride | — | No / SF6-free | No / SF6-free |
| Main Switching Device Configuration | — | Fixed vacuum disconnecting circuit-breaker Integrated breaking, disconnecting and earthing functions | Vacuum circuit-breaker; disconnector / earthing switch configuration to be confirmed |
| Internal Arc Classification and Installation Conditions | — | Confirm against the internal arc test report for the selected switchgear type; do not infer from the short-time withstand current | Confirm against the internal arc test report for the selected switchgear type; do not infer from the short-time withstand current |
| Installation Arrangement | — | Indoor, fixed modular switchgear is selected for this table | Installation and service conditions to be confirmed by supplier documentation |
| Catalogue Ambient Temperature / Altitude Conditions | — | −15 to +40 °C; −25 °C; screened cable connections are required at altitudes ≤3000 m | −15 to +40 °C; −25 °C; screened cable connections are required at altitudes ≤3000 m |
Medium Voltage Switchgear Features & Procurement Considerations
Compare insulation systems, switching functions, protection arrangements and maintenance access when specifying medium voltage switchgear for your project.
Full Insulation Solution Selection
Flexible selection of Air (AIS), Gas (GIS/SF6), and Solid Insulation (SIS) technologies per IEC 62271 and GB 3906 standards for 6~40.5kV systems to optimize space, budget, and environmental conditions.
Switching & Protection
High short-circuit breaking current (Isc) and rated voltage (Ue) ratings matched with selective time-current curves (t-I) to ensure rapid fault isolation and upstream/downstream protection logic.
Maintenance Planning
Robust mechanical and electrical 5-safety interlocks per GB 3906 alongside IAC internal arc classification testing to effectively prevent operator errors and protect site personnel.
Project Rating Selection
Enclosure protection ratings up to IP65 designed to withstand harsh outdoor conditions, heavy pollution, high humidity, condensation, extreme cold, and high altitudes.
Modular Interchangeable Interface
Standardized primary/secondary dimensions (A/B/C) and withdrawable circuit breaker truck interfaces enable seamless modular swapping, fast installation, and easy capacity expansion.
Low Maintenance & Serviceability
Maintenance-free operating mechanisms and modular layout drastically reduce routine inspection frequency, simplify field servicing, and minimize total cost of ownership (TCO).
Life Endurance & High Reliability
Engineered to high M2/E2 mechanical and electrical endurance classes per IEC standards, providing reliable switching operations and an operating lifespan exceeding 30 years.
Compliant Delivery & Technical Support
Complete engineering technical handover package including IEC/GB type-test reports, certified drawings, and specification sheets to streamline bidding and grid connection acceptance
Medium Voltage Switchgear Applications & Industries Served
Review typical distribution applications and confirm the panel arrangement, installation environment and protection duty for your project.
Substation
Medium voltage switchgear for incoming, outgoing and bus-section circuits in utility and industrial substations. Confirm the protection scheme and installation requirements.
太阳能发电厂
Switchgear for photovoltaic collection and distribution circuits. Specify feeder functions, cable interfaces and the grid-connection protection requirements.
火力发电厂
Switchgear for auxiliary supplies and industrial distribution in power-generation facilities. Match the panel configuration to the approved single-line diagram.
配电网络
Distribution panels and ring main units for urban and rural networks. Review sectionalizing, transformer protection and future network expansion requirements.
Wind Farms
Switchgear for wind-farm collection networks and substation interfaces. Confirm site conditions, feeder ratings and remote-control requirements.
储能发电站
Switchgear for medium-voltage distribution and grid interfaces in energy-storage projects. Coordinate protection, interlocks and operating requirements with the system design.
Medium Voltage Switchgear Technical Review, Verification & Project Delivery
Use this project review framework to confirm the switchgear 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。检查来料、装配记录、线路、机械运行情况、联锁装置以及适用的例行测试。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。气体系统检查仅适用于使用绝缘气体的设备。【此处手动添加：生产照片、检验记录和已批准的 FAT 范围】
Technical Review
根据采购方规格、单线图以及适用的装配和部件标准，对选定的中压开关设备进行审核。确认绝缘系统、母线电流、故障额定值、保护继电器、电缆连接、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 medium voltage switchgear project? Send the single-line diagram, electrical ratings, panel schedule, site conditions, quantities and destination so that the technical and commercial requirements can be reviewed.
Medium Voltage Switchgear FAQ - Technical & Purchasing Questions
答案涵盖设备选择、配置、安装条件、测试文件和项目交付。
Start with the single-line diagram, nominal system voltage, equipment rated voltage, busbar current and fault duty. Select AIS, GIS, RMU or solid-insulated construction according to the project requirements. Confirm final ratings against the selected panel data sheet and test evidence.
提供所需的尺寸、保护功能、控制电压、接口和铭牌要求。在接受订单之前,必须在技术报价中确认定制和 OEM 范围。
该时间表取决于批准的配置、数量、文件审查和检查要求。获取特定订单的书面生产和发货时间表。
索取批准的数据表、总体布置图、接线信息、安装说明、常规测试记录和适用的型式测试证据。同意合同中的确切提交清单和 FAT 文件。
Confirm indoor or outdoor suitability, ambient temperature, altitude, humidity, pollution, enclosure protection and available installation space. Outdoor switchgear requires a suitable enclosure and verified service conditions.
发送单线图、设备额定值、电路配置、保护要求、现场条件、数量、目的地和所需文件。包括与标准配置的任何偏差以供审查。
Medium Voltage Switchgear 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。
Medium Voltage Switchgear Selection Guide
Compare AIS, GIS, RMU and solid-insulated switchgear when preparing a project specification. Review electrical ratings, installation conditions and the required circuit functions.
Switchgear Protection & Circuit Configuration
Understand how incoming feeders, outgoing feeders, bus sections and protection relays fit into the single-line diagram and operating requirements.
Switchgear Testing & Procurement Checklist
Prepare the drawing, test-document and delivery requirements needed for a technical enquiry and project-specific quotation.