Main features:
Modular design: The modular frame structure is adopted to highly integrate the disconnector, vacuum circuit breaker, grounding switch, sensor and interlocking mechanism, which is convenient for independent replacement and maintenance, and improves the compatibility and maintenance convenience of the overall equipment.
Strong electrical performance: The main circuit adopts APG high-strength epoxy resin closed column, which has stronger insulation performance and environmental adaptability to ensure long-term stable operation.
Compact and compatible: It is suitable for the cabinet size of 500×1000×1800mm, suitable for various compact installation environments.
Anti-misoperation design: The forced mechanical interlocking design is adopted between the disconnector, circuit breaker and grounding switch to prevent misoperation and ensure safe operation.
Rotary disconnector: The rotary visible break disconnector is adopted, and the break can be clearly displayed after the switch is opened, which enhances the visibility and safety of the operation.
Modular operating mechanism: The operating mechanism adopts a modular design, which can be replaced or repaired independently, supports manual operation and optional AC/DC energy storage operation, and meets the needs of remote control.
Environmentally friendly and low maintenance: The equipment adopts environmentally friendly materials and high-strength design, has maintenance-free characteristics, and reduces the operation and maintenance costs in long-term use.
Applicable occasions:
Applicable to 6-12kV medium-voltage power systems, widely used in electrical protection and control of power plants, substations and industrial facilities.
It can be used as a protection unit for substations and main transformers to ensure the stable operation of the power system.
Applicable to environments with frequent operations or short-circuit protection.
Safety design:
Reliable interlocking structure: The cabinet door and the grounding switch are designed with a reliable interlocking mechanism to ensure that no misoperation occurs during operation and protect the safety of operators.
Forced interlocking: The forced interlocking mechanism between the disconnector, circuit breaker and grounding switch effectively avoids the risk of misoperation and ensures the safe operation of the equipment.
Use environment:
Ambient temperature: -25℃ to +40℃
Relative humidity: daily average <95%, monthly average <90%
Altitude: no more than 1000 meters (for areas with higher altitudes, the selection needs to be adjusted according to the electrical protection factor)
Seismic intensity: no more than 8 degrees
Use environment: environment without explosion hazard, chemical hazard, and severe vibration
Technical specifications:
Rated voltage: 12 kV
Rated current: 630A
Rated frequency: 50Hz
Applicable cabinet size: 500×1000×1800mm
Operation mode: manual or optional energy storage operation (AC/DC)
Product compliance standards:
IEC 62271-100: High-voltage AC circuit breakers
GB/T 11022: Technical conditions for high-voltage switchgear
GB 1984: High-voltage AC circuit breakers
GB 311.1: Insulation coordination of high-voltage electrical equipment
The main technical parameters
| Item | Unit | Data | |||
| 1 | Rated voltage | KV | 12 | ||
| 2 | Maximum working voltage | KV | 12 | ||
| 3 | Rated current | A | 630 | 1250 | |
| 4 | Rated short-circuit break current | KA | 20/25 | 31.5 | |
| 5 | Rated short-circuit close current (peak value) | KA | 50/63 | 80 | |
| 6 | Rated withstand current (peak value) | KA | 50/63 | 80 | |
| 7 | 4S Rated little withstand current | KA | 20/25 | 31.5 | |
| 8 | Rated insulation level | Industrial frequency withstand voltage | KA | 42/48 | |
| Thunder impulse
withstand voltage |
75/85 | ||||
| 9 | Rated operation order | Off-0.3S on and off-180S-on and off | |||
| 10 | Mechanical life | times | 10000 | ||
| 11 | Rated short-circuit current break and close time | times | 50 | ||
| 12 | Speak and move organization amount assign the current
of the floodgate(DC) |
V | AC.DC.110,220 | ||
| 13 | Speak and move organization amount equal to the current
of the floodgate(DC) |
V | AC.DC 110,220 | ||
| 14 | Switching distance of the contact | mm | >11 | ||
| 15 | Ultra journey(touches the head spring and compress length) | mm | 4+/-0.5 | ||
| 16 | Three-phase breaking into shut
floodgate sex of the same period |
ms | <2 | ||
| 17 | Touch the head and shut a floodgate of time of bouncing | ms | <2 | ||
| 18 | Average speed of breaking brake | m/s | 0.9~1.7 | ||
| 19 | Average speed of closing brake | m/s | 0.6~1.0 | ||
| 21 | Time of closing brake | s | <0.1 | ||
| 22 | Each the resistance of main return circuit | u Ω | <45 | ||
| 23 | Allowance abrasion cumulated thickness
of the moving and stationary contact |
mm | 3 | ||
Conclusion:
The BQVN-12GD series three-position high-voltage vacuum circuit breaker has become an ideal choice for key protection devices in power systems with its excellent performance, compact design and high reliability. The product’s modular design, forced mechanical interlocking, rotating visible break and other advanced technologies not only improve operational safety, but also significantly reduce maintenance costs and risks.
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