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The Outdoor High Voltage Vacuum Circuit Breaker is a high-performance switching device developed for modern medium-voltage outdoor power distribution systems. Designed for utility networks, railway electrification, renewable energy projects, and industrial substations, it provides reliable protection against overloads, short circuits, and abnormal operating conditions.
Based on advanced vacuum interruption technology, this High Voltage Vacuum Circuit Breaker delivers fast fault current interruption, excellent dielectric recovery, and long mechanical endurance without the need for insulating oil or SF6 gas. The environmentally friendly SF6-free design reduces maintenance requirements while ensuring stable operation in demanding outdoor environments.
Our product portfolio includes the 27.5kV Outdoor Circuit Breaker , the 27.5kV Vacuum Circuit Breaker , and customized Outdoor Vacuum Circuit Breaker solutions for different power system requirements.
The breaker adopts a sealed vacuum interrupter integrated with epoxy resin insulated poles, creating a highly reliable insulation structure that prevents moisture, dust, and environmental pollution from affecting electrical performance.
Compared with conventional circuit breakers, the vacuum interruption system provides cleaner switching performance with lower contact erosion and longer service intervals. The compact mechanical design simplifies transportation, installation, and maintenance, making it suitable for both new power projects and retrofit applications.
The Outdoor High Voltage Vacuum Circuit Breaker is widely used in power infrastructure projects where safety, reliability, and operational continuity are critical.
| Parameter | Specification | Technical Description |
|---|---|---|
| Rated Voltage | 27.5 kV AC | Suitable for medium-voltage outdoor distribution networks |
| Rated Frequency | 50 / 60 Hz | Compatible with global power system standards |
| Rated Normal Current | 630A / 1250A / 2000A | Multiple configurations for different load requirements |
| Rated Short-Circuit Breaking Current | 20kA / 25kA / 31.5kA | Reliable interruption during severe fault conditions |
| Rated Making Current | 50kA / 63kA / 80kA Peak | Strong short-circuit withstand capability |
| Insulation Medium | Vacuum + Epoxy Resin | SF6-free environmentally friendly insulation structure |
| Power Frequency Withstand Voltage | 85 kV | Ensures stable insulation performance |
| Lightning Impulse Withstand Voltage | 185 kV BIL | Enhanced lightning protection capability |
| Operating Sequence | O-0.3s-CO-3min-CO | Supports automatic reclosing applications |
| Mechanical Endurance | ≥30,000 Operations | Designed for long-term switching reliability |
| Electrical Endurance | 30 Full Fault Interruptions | Maintains reliable fault clearing performance |
| Protection Degree | IP55 | Suitable for outdoor installation environments |
| Operating Temperature | -40°C to +55°C | Suitable for extreme climate conditions |
| Altitude Capability | ≤2000m | Higher altitude customization available |
| Auxiliary Supply Voltage | DC110V / DC220V | Compatible with substation control systems |
| Applicable Standards | IEC 62271-100 / GB1984 / ANSI C37 | International compliance requirements |
The Outdoor High Voltage Vacuum Circuit Breaker is engineered with a sealed vacuum interruption system and advanced solid insulation technology to provide stable switching performance in outdoor power networks. Unlike traditional oil circuit breakers, this vacuum-based design eliminates the risk of oil leakage, reduces environmental impact, and significantly lowers long-term maintenance requirements.
The integrated epoxy resin insulation structure improves dielectric reliability while protecting internal components against moisture, dust, and pollution. The independent vacuum interrupter chambers ensure rapid arc extinction during fault conditions, minimizing contact erosion and extending the electrical service life of the breaker.
Designed for utilities, industrial substations, renewable energy plants, and railway electrification systems, this outdoor vacuum breaker combines mechanical durability with intelligent monitoring capability. Optional accessories including current transformers, voltage sensors, remote terminal units, and communication modules allow seamless integration into modern smart grid applications.
The outdoor high voltage vacuum circuit breaker is widely used in medium-voltage and high-voltage distribution systems where reliable fault isolation and continuous power supply are essential.
| Application Field | Typical Installation | Key Benefits |
|---|---|---|
| Utility Distribution Networks | Outdoor substations, feeder lines, switching stations | Fast fault interruption and improved grid reliability |
| Railway Electrification Systems | Traction substations and power supply sections | Frequent switching capability and high mechanical endurance |
| Renewable Energy Projects | Solar farms, wind power plants, energy storage stations | Stable protection for fluctuating power generation systems |
| Industrial Power Facilities | Mining, manufacturing plants, infrastructure projects | Reliable protection against overload and short circuit faults |
| Smart Grid Applications | Remote-controlled distribution automation systems | Supports SCADA monitoring and intelligent operation |
As a professional manufacturer of outdoor vacuum circuit breakers, we apply strict quality control procedures throughout design, production, assembly, and final inspection. Each breaker undergoes comprehensive testing before shipment to ensure electrical safety, mechanical reliability, and long-term operational stability.
| Selection Advantage | Engineering Value |
|---|---|
| SF6-Free Vacuum Technology | Lower environmental impact, reduced maintenance, and stable interruption performance |
| Long Mechanical Service Life | Up to 30,000 operating cycles for demanding switching applications |
| Outdoor Protection Design | IP55 enclosure and corrosion-resistant materials for harsh environments |
| Flexible Configuration | Optional CTs, sensors, communication modules, and remote control functions |
| International Compliance | Designed according to IEC 62271-100, GB 1984, and related industry standards |
An outdoor high voltage vacuum circuit breaker is used to protect electrical networks by interrupting abnormal currents caused by short circuits, overloads, and system faults. It is commonly installed in substations, distribution feeders, renewable energy plants, and railway power systems.
Vacuum interruption technology provides fast arc extinction without using insulating oil or SF6 gas. This reduces maintenance requirements, improves environmental performance, and offers long electrical service life.
Our outdoor vacuum circuit breaker solutions are available for 27.5kV, 35kV, 40.5kV, and customized voltage applications according to project requirements.
Yes. The breaker can be equipped with intelligent control modules, RTUs, communication interfaces, and monitoring sensors to support SCADA systems and remote operation.
With proper installation and operating conditions, the breaker can achieve decades of reliable service. The mechanical endurance can reach 30,000 operations depending on configuration.
We provide customized outdoor high voltage vacuum circuit breaker solutions for power utilities, EPC contractors, industrial users, and electrical equipment distributors worldwide. Configuration options include rated current, breaking capacity, control voltage, communication modules, CT integration, and mounting structures.
Contact our engineering team today to discuss your project requirements and receive a professional technical proposal for your outdoor vacuum circuit breaker application.
Request a quotation now for reliable high voltage switching equipment manufactured for global power systems.
