40.5kV SF6 Gas Circuit Breaker
GPFN series high voltage AC sulfur hexafluoride(SF6) circuit breaker is a three-phase AC 50Hz indoor switchgear. It is a new generation of SF6 circuit breaker independently developed by our company based on the advanced SF6 breaking technology at home and abroad. It has the characteristics of light and compact structure, easy installation, less maintenance workload, safe and reliable operation, long service life and excellent insulation and arc extinguishing characteristics. and opening and closing capacitor banks.
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GPFN series high voltage AC sulfur hexafluoride(SF6) circuit breaker is a three-phase AC 50Hz indoor switchgear. It is a new generation of SF6 circuit breaker independently developed by our company based on the advanced SF6 breaking technology at home and abroad. It has the characteristics of light and compact structure, easy installation, less maintenance workload, safe and reliable operation, long service life and excellent insulation and arc extinguishing characteristics. and opening and closing capacitor banks.
The pole interrpter of the circuit breaker, that is, the arc extinguishing chamber part, is a closed system that is maintenance-free for life. It is not affected by dust and condensation, and has strong environmental adaptability. The operation and maintenance costs are reduced, the independent structure of each pole of the circuit breaker and the operating mechanism are installed on the same rigid base, which can be used as a fixed installation unit or with a special propulsion mechanism to form a handcart unit. The light and compact circuit breaker structure guarantees its sturdiness and reliability.
| Rated voltage | 40.5kV |
| Rated frequency | 50Hz |
| Rated current | 1250~2500A |
| Mechanical life | 10000 times |
| Short circuit current breaking times | 30 times |
| Rated voltage of energy storage motor | DC110/220V, AC220V |
| Annual leak rate | ≤0.5% |
| Gas moisture content | ≤150μL/L |
| Moving contact stroke | ≥78mm |
| Contact Spacing | 50±1.5mm |
| Main conductive loop resistance | ≤32μΩ (Handcart), ≤20μΩ (Fixed type) |
| Compliance | Meets international safety standards such as ISO, IEEE |
The circuit breaker uses SF6 gas as the insulating medium and arc extinguishing medium, and the insulating strength of SF6 gas is about 2.5 times that of air under atmospheric pressure.
The circuit breaker has high safety. Since the internal arc extinguishing chamber of the circuit breaker operates under low pressure, although the gas compression and heat increase during operation will cause the internal pressure to rise, it is still in a low pressure state, reducing the risk of air leakage.
The circuit breaker has a good function of breaking capacitive current, especially suitable for the operation and protection of the capacitor bank. It does not generate operating overvoltage when breaking, so it can avoid damage to the life of the capacitor bank.
The main body of the circuit breaker is set in an insulating cylinder made of epoxy resin using APG process. This structure can effectively prevent the impact of external forces, environmental pollution and other external factors on the primary insulation.
The circuit breaker is equipped with a pressure relief safety film to ensure that any unexpected abnormal overpressure is released, although this situation will not occur.
The circuit breaker is equipped with SF6 low air pressure alarm auxiliary switch to ensure that the circuit breaker works under normal pressure.
The air chamber of the circuit breaker is designed to be maintenance-free, and each phase pole is designed as a gas-tight, permanently closed element, and the annual leakage rate is less than 0.5%. Fill the operating mechanism with lubricating oil.
The dimensions of the floor-standing circuit breaker are consistent with the mainstream 40.5kV vacuum circuit breakers on the market, and can be easily and safely assembled in the 40.5kV floor-to-ceiling removable switch cabinet.
| Altitude | No more than 1000m |
| Ambient temperature | -15℃～+40℃; the daily average temperature does not exceed +35℃ |
| Environmental humidity |
- Daily average relative humidity: ≤95% - Monthly average relative humidity: ≤90% - Daily average vapor pressure: ≤2.2×10⁻³ MPa - Monthly average vapor pressure: ≤1.8×10⁻³ MPa |
| Earthquake intensity | No more than 8 degrees |
| Location of use | Ambient air is not appreciably polluted by dust, smoke, corrosive and/or flammable gases, vapors or salt mist |
| Note | When the actual use environment does not meet the above conditions, please consult with our company |
GreenPower provides professional smart switchgear solutions. Contact us immediately for free consultation and quotation. Our professional team will provide you with full service and technical support throughout the process.
Email: [email protected]
Tel: +86-18989782765
Fax: 057785500968
