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A High Voltage Circuit Breaker 110–132KV is a critical switching device designed to protect and control high-voltage transmission and substation networks. It provides fast fault interruption, reliable isolation, and stable operation for utility grids, industrial power systems, and renewable energy transmission projects operating at 110kV and 132kV voltage levels.
Our 110–132KV high voltage circuit breakers use advanced SF6 insulation and arc interruption technology to achieve high breaking capacity, excellent dielectric performance, and long service life. Designed according to IEC 62271-100 requirements, these breakers are engineered for demanding applications including transformer protection, transmission line switching, capacitor bank operation, and grid modernization projects.
The core advantage of this high voltage switching solution is the integration of SF6 gas insulation and arc extinguishing technology. SF6 provides superior dielectric strength, allowing the breaker to maintain compact dimensions while safely interrupting high short-circuit currents.
Compared with traditional air-insulated switching equipment, SF6 circuit breakers offer lower operating noise, reduced maintenance requirements, and improved reliability under harsh environmental conditions. The sealed gas chamber design maintains stable insulation performance throughout the product lifecycle.
Available configurations include the 126KV SF6 Circuit Breaker, 126kV Outdoor SF6 Breaker, 126KV High Voltage SF6 Circuit Breaker, and LW36-126 SF6 Circuit Breaker, covering different substation layouts and transmission requirements.
The breaker adopts a high-performance puffer interruption system that generates strong gas flow during fault clearing. This design improves arc extinction efficiency, reduces contact erosion, and minimizes switching overvoltage during operation.
The operating mechanism uses a spring-based energy storage system or hydraulic spring mechanism depending on project requirements. Each unit is factory tested for mechanical operation, insulation strength, gas tightness, and electrical performance before shipment.
Optional intelligent monitoring functions allow integration with modern SCADA and digital substations, including SF6 density monitoring, mechanism condition monitoring, partial discharge detection, and operational data acquisition.
| Parameter | Specification |
|---|---|
| Rated Voltage | 126kV / 132kV |
| Rated Frequency | 50Hz / 60Hz |
| Rated Current | 2000A / 2500A / 3150A |
| Short Circuit Breaking Current | 31.5kA / 40kA |
| Short-Time Withstand Current | 40kA (3 seconds) |
| First-Pole-To-Clear Factor | 1.3 / 1.5 |
| Insulation Medium | SF6 gas insulation and arc extinguishing system |
| Rated SF6 Pressure | 0.5–0.7MPa at 20°C |
| Operating Mechanism | Spring-spring / Hydraulic spring mechanism |
| Mechanical Endurance | 10,000 CO operations (Class M2) |
| SF6 Leakage Rate | ≤0.5% per year |
| Operating Temperature | -30°C to +50°C |
| Creepage Distance | ≥25mm/kV for pollution environments |
| Installation Altitude | ≤1000m without derating |
| Applicable Standards | IEC 62271-100 and related international standards |
The 110–132KV high voltage circuit breaker is widely used in critical power infrastructure where reliable fault isolation and uninterrupted grid operation are required.
As a professional high voltage switchgear manufacturer, we provide customized solutions for utility companies, EPC contractors, and power equipment distributors worldwide.
Customization options include rated current selection, CT configuration, bushing arrangement, control voltage, monitoring systems, and mechanical structure optimization according to project specifications.
Every breaker undergoes strict factory inspection including gas leakage testing, mechanical operation testing, insulation verification, and electrical performance testing to ensure reliable field operation throughout its service life.
Q1: What is a 110–132KV high voltage circuit breaker used for?
It is used in high-voltage transmission systems to protect electrical equipment by interrupting fault currents and safely isolating damaged sections of the grid.
Q2: Why are SF6 circuit breakers commonly used at 110kV and 132kV levels?
SF6 provides excellent insulation strength and arc extinguishing capability, allowing compact design, reliable interruption performance, and reduced maintenance requirements.
Q3: Can the breaker be customized for different substation projects?
Yes. Voltage rating, current capacity, CT configuration, control system, monitoring functions, and installation structure can be customized according to project requirements.
