In a high-voltage power distribution system, a circuit breaker is the last insurance. Our high-voltage air circuit breakers are mainly used to quickly cut the circuit when faults such as overload and short circuit occur to prevent accidents from expanding.
It uses air arc extinguishing, does not require SFP or other special gases, is environmentally friendly and maintenance-free, and the structure of the arc extinguishing chamber is repeatedly adjusted according to the actual breaking test, which can pull off the arc in a very short time, cool it, and minimize the ablation of the contacts.
The structure of the whole machine is designed according to industrial-grade strength, and the stability and life of long-term load operation are the two indicators we care about most.
Core features
Fast arc extinguishing and low heat generation
The geometry of the air arc extinguishing chamber has been adjusted through many simulation and actual measurements, and the arc generated when it is broken can be quickly stretched and cooled. With a low-resistance conductive circuit, the temperature rise during long-term operation can be controlled within a small range, which is critical to reduce the aging of the contacts.
Strong, anti-build
The shell and internal brackets are made of thickened steel plates and reinforced ribs, which can withstand the impact of electric power caused by the fault current. The operating mechanism is a spring energy storage type, the action is simple, and the closing time is basically not affected by the fluctuation of the operating voltage.
Can be adjusted as needed
The rated voltage, current level, and breaking capacity can all be selected according to the project requirements. For example, new energy power plants pay attention to frequent operation and weaher resistance, and heavy industry sites pay more attention to short-term current tolerance. We will adjust according to these priorities.
Can be adjusted as needed
The rated voltage, current level, and breaking capacity can all be selected according to the project requirements. For example, new energy power plants pay attention to frequent operation and weather resistance, and heavy industry sites pay more attention to short-term current tolerance. We will adjust according to these priorities.
Common applications
Special working conditions: such as high altitude, high humidity, and salt spray environments, we can adjust the insulation and structural protection in a targeted manner.
Power grid engineering
Urban distribution networks and substations are responsible for isolating the fault segments and ensuring that the rest of the power supply continues.
Heavy industry
Steel plants, chemical plants, etc. Have large currents and heavy loads, which require high equipment stability.
New energy
Boost stations and collector lines for photovoltaic and wind power need to adapt to power fluctuations and relatively frequent start and stop.
Large-scale infrastructure
Subways, airports, data centers, complex power supply structures, and very strict requirements for reliability and safety.
Customized solutions are available to match your unique requirements; please don't hesitate to reach out.
| Number | Parameter name | Unit | Technical Parameters | |||
| 1 | Rated voltage | kV | 12 | |||
| 2 | Rated short-time frequency withstand voltage (1 min) | kV | 42 | |||
| 3 | Rated lightning impulse withstand voltage (peak) | kV | 75 | |||
| 4 | Rated frequency | Hz | 50 | |||
| 5 | Rated current | A | 630/1250/1600/2000/2500/3150/4000 | |||
| 6 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 |
| 7 | Rated short-time withstand current | kA | 20 | 25 | 31.5 | 40 |
| 8 | Rated short circuit duration | S | 4 | |||
| 9 | Rated short-circuit closing current | kA | 50 | 63 | 80 | 100 |
| 10 | Rated peak withstand current | kA | 50 | 63 | 80 | 100 |
| 11 | Number of rated short-circuit current starts | times | 30 | 30 | 30 | 20 |
| 12 | Rated individual capacitor bank opening current | A | ≤630 | |||
| 13 | Rated back-to-back capacitor bank opening current | A | ≤400 | |||
| 14 | Rated capacitor bank closing inrush current | kA | 12.5(frequency≤1000Hz) | |||
| 15 | Closing time | ms | ≤80 | |||
| 16 | Split time | ms | Maximum Voltage | ≤40 | ||
| ms | Rated Voltage | ≤50 | ||||
| ms | Minimum Voltage | ≤60 | ||||
| 17 | Time of ignition | ms | ≤15 | |||
| 18 | Mechanical life (M2) | times | 30000 | |||
| 19 | Allowable cumulative thickness of dynamic and static contact wear | mm | 3 | |||
| 20 | Rated closing operating voltage | V | AC/DC 220, AC/DC 110 | |||
| 21 | Rated breaking operating voltage | V | AC/DC 220, AC/DC 110 | |||
| 22 | Rated operating voltage of energy storage motor | V | AC/DC 220, AC/DC 110 | |||
| 23 | Rated power of energy storage motor | W | 80 (40KA Motor speed 100W) | |||
| 24 | Energy storage time | s | ≤15 | |||
| 25 | Contact opening distance | mm | 9±1 | |||
| 26 | Over traveling distance | mm | 3.5±0.5 | |||
| 27 | Contact closing bounce time | ms | ≤2 | |||
| 28 | Three-phase switching and closing non-synchronous | ms | ≤2 | |||
| 29 | Contact splitting rebound amplitude | mm | ≤3 | |||
| 30 | Contact closing contact pressure | kA | 20 | 25 | 31.5 | 40 |
| N±8% | 2200 | 2500 | 3100 | 4750 | ||
| 31 | Average breaking speed (contacts separated by 6mm) | m/s | 1.1±0.2 | |||
| 32 | Average closing speed (6mm contact closure) | m/s | 0.6±0.2 | |||
| 33 | Dominant electric circuit resistance | A | 630 | 1250 | 1600-2000 | ≥2500 |
| 34 | μΩ | ≤50 | ≤45 | ≤35 | ≤25 | |
| Rated operating sequence (1) 20~31.5KA | Minutes - 0.3s - combined minutes - 180s - combined minutes | |||||
| 35 | Rated sequence of operation (2) 40KA | Minutes - 0.3s - combined minutes - 180s - combined minutes | ||||
| Secondary circuit frequency withstand voltage (1min) | V | 2000 | ||||
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