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1. Advanced Vacuum Arc Quenching Technology
The breaker utilizes a high-performance vacuum interrupter sealed within a robust, solid insulation pole. It delivers exceptional dielectric strength and provides a rapid, zero-arcing interruption capability for both nominal load currents and severe fault currents (with short-circuit breaking capacities typically reaching 25kA / 31.5kA). The minimized contact erosion ensures superior mechanical endurance exceeding 10,000 operations and electrical endurance beyond 30,000 times. This advanced technology effectively guarantees a long operational lifespan without the need for frequent internal maintenance or component replacements.
2. Robust Composite Insulators for Harsh Weather
The unit is equipped with highly weather-resistant silicon rubber/polymer insulators, featuring an extended creepage distance specifically designed to prevent dangerous external flashovers. These premium composite materials offer superior hydrophobicity, strong UV resistance, and excellent anti-pollution performance. As a result, the breaker maintains absolute dielectric reliability even in extreme environments, such as coastal salt-fog zones, heavy rain areas, and highly polluted industrial regions, completely eliminating the risk of external insulation breakdown during wet weather.
3. Flexible Spring Operating Mechanism
Designed for versatility, the durable spring energy-storage mechanism can be manually charged using an external crank handle or automatically charged via an optional integrated motor drive (DC 220V/110V or AC 220V). This dual-operation design facilitates both straightforward local manual control and fully automated remote operation for distribution automation systems (SCADA). It enables rapid feeder restoration and fault isolation without relying on external auxiliary power supplies, significantly enhancing the overall resilience and intelligence of the grid network.
4. Clear Manual Isolation & Safety Interlocks
The breaker features a sturdy, color-coded manual isolation/earthing rod system (identified by intuitive Red, Green, and Yellow operating handles). The built-in, fail-safe mechanical interlock ensures that the grounding/disconnect switch can only be engaged when the main vacuum breaker is safely in the open position. This creates a clearly visible isolation gap, providing absolute physical safety for line maintenance technicians and preventing any misoperation. The simple, intuitive panel layout ensures safe, mistake-proof handling even for personnel with minimal prior training.
| Item | Unit | Data |
| Rated voltage | KV | 35 |
| Rated current | KA | 630/1250/1600 |
| Rated frequency | HZ | 50/60 |
| Power frequency withstand voltage 1min(wet)(dry) | KV | 80 95/95 |
| Lightning impulse with stand voltage(peak) | KV | 185 |
| Rated short circuit breaking current | KA | 20/25/31.5 |
| Rated short circuit switching current(peak) | KA | 63/80 |
| Rated peak with stand current | KA | 63/80 |
| 4s short time with stand current | KA | 25/31.5 |
| Rated short circuit breaking times | times | 30 |
| Mechanical life | times | 10000 |
| Control voltage of mechanism | V | AC/DC220 |
| Secondary circuit 1min power frequency voltage | KV | 2 |
| clearance between open contacts | mm | 16±1 |
| Contact over-travelling distance | mm | 4±0.5 |
| Opening speed | m/s | 1.4-1.8 |
| Closing speed | m/s | 0.4-0.8 |
| Contact closing bounce time | ms | ≤5 |
| Distance of phase to phase | mm | 560±2 |
| The circuit resistance of each phase | Ω | <120 |
| Closing time | ms | 25-45 |
| Opening time | ms | 20-45 |
| Weight | KG | 295 |
1. Rural Power Grids & Remote Overhead Lines
Ideally suited for distribution lines in rural, mountainous, and other remote regions where grid infrastructure is sparse. Its robust outdoor construction and simple manual operation mechanism allow local maintenance crews to manually open or close the switch during emergencies, even without a main grid power supply. This feature significantly reduces power outage duration in agricultural areas, making this breaker a critical tool for improving the stability and reliability of rural electrification networks and essential farming equipment.
2. Urban Distribution Network Automation Systems
Widely deployed in automated urban overhead ring-main units (RMUs) and distribution substations. When seamlessly integrated with a remote terminal unit (RTU) and a motorized mechanism, it acts as an intelligent automated actuator. During system faults, the centralized power dispatch center can instantly isolate the faulted line section via remote command. This enables quick automatic power restoration for the unaffected area, significantly improving the power supply quality for urban residents, commercial shopping centers, and critical municipal infrastructures.
3. Industrial Substation & Feeder Outlet Protection
Acts as a primary incoming line or outgoing feeder switch in 35kV/40.5kV industrial distribution substations. It reliably handles the safe switching of high transformer excitation currents and heavy motor starting surges. Its impressive short-circuit breaking capacity protects expensive manufacturing equipment and critical production lines from severe power grid faults. By mitigating power interruptions, it effectively minimizes costly production halts and industrial financial losses within large-scale manufacturing parks.
4. New Energy Integration (Solar & Wind Power Plants)
Essential for gathering the electricity generated by scattered renewable energy sources in utility-scale solar farms and wind power stations. Installed on the overhead collection lines between the wind turbine towers or PV array string inverters and the main step-up substation, it allows for safe and frequent grid connection/disconnection under intermittent natural conditions. The rapid operating speed and reliable mechanism effectively safeguard expensive power inverters and convertors from severe grid-side faults.
5. Electrified Railway Contact Line Power Supply
Employed in the overhead contact line power supply systems of electrified railways and high-speed rail networks. It is specifically designed to handle the highly frequent load switching caused by aggressive train acceleration and regenerative braking. Its highly reliable spring mechanism and ultra-fast operation ensure that the traction power supply system can seamlessly and safely cut off the current in the event of line faults, thereby guaranteeing the continuous, safe, and punctual operation of railway transportation networks.
Q：Are you a trading company or factory?
A：We are a manufacturer boasting 15 years of industry experience and holding proprietary import-export rights.
Q：What certifications do you have?
A：Yes, we hold ISO, CE, and IEC certificates. In addition, we possess a number of design patents and a Special Equipment Manufacturing License.
Q：How long is your delivery time?
A：For normal products in 7-10 days; For bulk order, in 15-25 days. It depends.
Q：What is the warranty time?
A：3 years warranty for all of our stainless steel products. Gaskets or the easy broken parts are not included due to the different application for customers.
