Your Professional High Voltage Circuit Breaker Supplier
Our goal is to become your true partner in the field of high voltage circuit breaker China.We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
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![Air Insulated]()
Air InsulatedAir isolated circuit breakers with disconnector which is used in eco-friendly switchgear and air insulated switgear (AIS), utilize a semi-encapsulated structure and adopts vacuum arc extinguishing...view more -
![Rmu Breaker]()
Rmu BreakerThis 12KV circuit breaker with disconnector in the environmental friendly switchgear, features a semi-encapsulated structure and offers advantages such as uniform electric field, reliable...view more -
![Air Insulated Circuit Breaker]()
Air Insulated Circuit BreakerThis 12KV air insulated circuit breaker, also known as an disconnect switch, features a distinct disconnect point and an integrated spindle structure.view more -
![Gas Insulated Circuit Breaker]()
Gas Insulated Circuit BreakerGas insulated circuit breaker with disconnector differs from others. While they are integrated, the disconnector is located above the circuit breaker. Consequently, the operating mechanisms for...view more -
![Gas Insulated Breaker]()
Gas Insulated BreakerThis gas-insulated circuit breaker with disconnector is 12KV 630A, which is used in gas insulated switchgear (GIS) to protect cables and machines from overloads, short circuits and insulation faults.view more -
![Air Switchgear]()
Air SwitchgearThe sealed environmentally friendly circuit breaker used in environmentally friendly cabinets utilizes vacuum arc extinguishing and features a compact design.view more -
![Gas Insulated Substation Components]()
Gas Insulated Substation Components12KV 1000A High-voltage circuit breakers ,like this kind gas insulated substation components, (often termed high-voltage switches) plays a critical role in SF₆ gas-insulated switchgears.view more -
![Gis Circuit Breaker]()
Gis Circuit BreakerGis circuit breaker is a three-position circuit breaker with disconnector and grounding, which adopts a splint-type structure and has the characteristics of small size, reliable breaking...view more
Why Choose Us
Our team:
We have a professional team of over 200 employees, including over 25 professional technicians.
Quality control:
We rigorously control every process, ensuring our products comply with relevant standards such as GB7251.1, GBT/23359, and JB/T9661.
Our services:
In the pre-sales stage, our team of experts will recommend the most suitable products according to the needs of customers and provide detailed technical consultation.
During the sales period, we ensure timely delivery and provide installation guidance.
For after-sales, we provide long-term technical support, warranty services and spare parts to help customers maximize the use of products and get reliable maintenance during use.
Advantage Of Circuit Breaker
Protection:
They protect the electrical system from damage by interrupting the current flow in abnormal conditions.
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Reusability:
Unlike fuses, most circuit breakers can be reset after they trip, making them reusable.
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Safety:
They help reduce the risk of electrical fires and electric shocks.
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Troubleshooting:
They can also be used as a manual disconnect for troubleshooting and equipment maintenance.
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Features of High Voltage Circuit Breaker
Various voltage: Suitable for high-voltage grids, such as 11kv, 24kv, 35kv.
Current interruption ability: Capable of breaking large short-circuit currents during faults to protect system integrity.
Isolation function: Allows safe isolation of the power supply during maintenance or repair to ensure worker safety.
Control and protection: In addition to basic switching functions, high-voltage circuit breakers offer control and protection features, such as overload and short-circuit protection.
Operating mechanism: Can be operated manually or controlled remotely, using electric or pneumatic mechanisms.
Arc extinguishing capability: Equipped with a specialized arc-extinguishing chamber to effectively extinguish arcs that could otherwise lead to equipment damage or safety hazards.
Sealing: For circuit breakers using sf6 (sulfur hexafluoride) gas.
Eco-friendly: Switch insulation components are primarily made of environmentally friendly thermoplastic clinker with a recycling rate of up to 90%.
No air pollution: Can use dry air, nitrogen, or mixed gases as the insulating medium.
Technical Parameters of High Voltage Circuit Breaker
| No. | Item | Unit | Data |
| 1 | Rated voltage | KV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630/1000/1250 |
| 4 | Rated short-time withstand current | kA | 20/25 |
| 5 | Rated peak withstand current | kA | 50 |
| 6 | Rated short-circuit duration | s | 4 |
| 7 | Rated short-circuit closing current | kA | 50 |
| 8 | Operating times | times | 1000 |
| 9 | Resistance of the main circuit | μΩ | ≤40; ≤80 |
| 10 | 1min power frequency withstand voltage | KV | 42/48 |
| 11 | Average speed of opening | m/s | 1.2±0.2 |
| 12 | Average closing speed | m/s | 0.8±0.2 |
Types of High Voltage Circuit Breaker
Air-insulated circuit breakers
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Gas-insulated circuit breakers
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Vacuum circuit breakers
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Application of High Voltage Circuit Breaker
1.Gas Insulated Switchgear
Cubicle Type Gas Insulated Switchgear (C-GIS) is a complete set of electrical equipment derived from the combination of GIS (gas insulated metal-enclosed switchgear) technology and conventional switchgear technology, commonly known as a gas-filled cabinet.
2.Air-insulated ring main unit (RMU).
This type of unit uses air as the primary insulation. Its main switch is equipped with a gas-generating, compressed air, or vacuum load switch. It is available in both negative-side and positive-side mounting options, and the operating mechanism is front-mounted. This type of unit is relatively large, with a width of 800mm for 12kV and 1700mm for 40.5kV. If a vacuum load switch is used as the main switch, since its empty interrupter can only interrupt, not isolate, an isolating switch must be added before the load switch during design to complete the isolation function.
3. Air and SF₆ Gas Hybrid Insulated Ring Main Unit
This type of ring main unit typically uses an SF₆ load switch as the main switch. It is enclosed in a fully sealed epoxy resin or stainless steel housing and filled with low-pressure SF₆ gas as the insulating medium (SF₆ gas also serves as the arc-extinguishing medium).
4. Solid-Insulated Ring Main Unit
This type of ring main unit completely eliminates the use of pressure vessels. The internal insulation and arc extinguishing of the switch body are achieved through a vacuum medium, while the outer insulation tubes are used to solidify the switch components. Enclosed busbars connect the various circuits. The insulation tubes utilize solid-sealed pole technology, organically integrating the vacuum interrupter, main conductive circuit, and insulation support into a single unit, achieving a fully insulated, fully sealed, and maintenance-free structure. The insulation tubes are made of epoxy resin, and the busbars are encapsulated with silicone rubber. This structure effectively mitigates corrosion of the power supply unit by isolating it from air, moisture, dust, and hot and cold air sources.
5. Gas-insulated Ring Main Unit
This type of ring main unit (RMU) encloses all high-voltage live conductors (such as three-position load switches and connecting busbars) in a stainless steel casing filled with low-pressure SF₆ gas, using SF₆ gas as both an insulating and arc-extinguishing medium. Due to its stainless steel casing, the gas-insulated RMU not only offers excellent strength, corrosion resistance, and heat dissipation, but also provides reliable grounding, ensuring maximum personal safety.
Packing and Shipping
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Packing |
Wooden / Catoon / Pallet |
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Shipping |
Express, Air Freight, Sea Freight, LCL/FCL |
FAQ
We're professional high voltage circuit breaker manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to buy high voltage circuit breaker at competitive price from our factory.
