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VS1-20
VS1-20 Vacuum Circuit Breaker
The 20KV VS1 circuit breaker is an indoor AC high-voltage vacuum circuit breaker designed for high-voltage distribution network backbone and large-scale energy scenarios. It is compatible with three-phase 50Hz power frequency AC circuits and has a rated voltage of 20KV. Its core applications include upgrading urban high-voltage distribution network backbone, large new energy bases, large substation outgoing lines, and high-voltage distribution network control and protection for ultra large industrial enterprises. This product adopts an integrated heavy-duty design of mechanism and circuit breaker, with a sturdy structure, excellent impact resistance, and vibration resistance.
It supports two installation forms: fixed and withdrawable handcart, and is suitable for the installation of large heavy-duty high-voltage switchgear. The product is manufactured strictly in accordance with standards such as GB1984, DL/T403, and IEC60056. It uses a large capacity vacuum arc extinguishing chamber and new copper chromium alloy contacts, with fast arc extinguishing speed, strong breaking ability, no harmful gas emissions, and no noise pollution. It can effectively cope with the ultra-high current, heavy load, and complex fault conditions of high-voltage distribution network backbone and large energy base, quickly cut off overload, short circuit, grounding and other fault currents, ensure the safe and stable operation of high-voltage distribution network and ultra large equipment, and is suitable for working environments with altitude ≤ 4500m (non-standard review required) and ambient temperature -35 ℃~50 ℃. It is the core equipment of high-voltage distribution network backbone and large energy scenarios.
Features
1. Strong breaking ability, suitable for ultra-high current:
adopting a high-capacity longitudinal magnetic field vacuum arc extinguishing chamber, optimizing the contact material and structure, the rated short-circuit breaking current can reach 50-63kA, and the rated short-circuit closing current can reach 125-160kA. It can reliably break the ultra-high short-circuit fault current of high-voltage distribution network backbone and large energy base, as well as the starting impulse current of ultra large equipment. The insulation recovery speed after arc is extremely fast, supporting multiple reclosing operations, and adapting to the needs of ultra-high current and heavy load operation
2. Excellent insulation level and high operational reliability:
The epoxy resin APG process is used to cast the insulation cylinder as a whole, and special insulation reinforcement materials are added. The anti creepage distance and insulation strength are greatly improved. The rated short-time power frequency withstand voltage (1 minute) can reach 105kV (relative to ground, phase to phase), 115kV (fracture), and the rated lightning impulse withstand voltage (peak) can reach 170kV (relative to ground, phase to phase), 190kV (fracture). It can stably withstand 20KV high voltage loads and effectively resist insulation hazards in high-altitude, high pollution, and high humidity environments.
3. Heavy duty structure with outstanding impact and vibration resistance:
Adopting a heavy-duty mechanical structure design, the body is welded with high-strength steel plates, and the components are subjected to high-temperature quenching and strengthening treatment, resulting in extremely high mechanical strength. The impact and vibration resistance performance far exceeds that of ordinary high-voltage VS1 circuit breakers. The mechanical life can reach 30000 times, and the full capacity short-circuit current breaking times can reach 100 times. The electrical life meets E4 level and is suitable for complex operating environments.
4. High level of intelligent integration, suitable for high-end operation and maintenance:
Equipped with an integrated intelligent monitoring system, it can monitor current, voltage, temperature, energy storage status, arc extinguishing chamber vacuum degree, and mechanical characteristic parameters in real time. It supports fault self diagnosis, remote opening and closing, remote fault positioning, trend analysis and early warning functions, and can seamlessly integrate with high-voltage distribution network automation systems and intelligent dispatch centers, achieving full process controllability and traceability of equipment operation.
5. Strong customization ability and adaptability to diverse scenarios:
Supports customization of rated current, breaking capacity, operation mode, protection scheme, and intelligent functions according to the personalized needs of large energy bases and super large industrial enterprises. It can adapt to special scenarios such as high altitude, high temperature, high cold, and high pollution, and can also be used with high-voltage supporting equipment. It has strong universality and meets the personalized needs of various high-voltage distribution network upgrades.
The rated current of this product covers 2500A~4000A, and different specifications such as 3150A and 4000A can be customized according to scene requirements. The rated short-circuit breaking current is 50~63kA, the rated short-circuit duration is 4s, the closing time is 35~80ms, the opening time is 20~45ms, the closing bounce time is ≤ 1.5ms, the opening and closing time is different ≤ 1.5ms, and the contact resistance is ≤ 80 μ Ω, meeting the ultra high current requirements of high-voltage distribution network backbone and large energy bases.
The suitable environmental conditions are: the daily average relative humidity does not exceed 95%, the monthly average does not exceed 90%, the earthquake intensity does not exceed 8 degrees, and there are no places with severe vibration, strong chemical corrosion, explosion hazards, or serious pollution; Customized enhanced insulation, sealing, and low-temperature protection solutions are available for high-altitude scenarios (>2500m); Low temperature adaptive operating mechanism can be customized for high-altitude scenes. The product meets the KEMA type test A-level certification standard and has passed strict type tests, factory inspections, and mechanical impact tests. Each unit comes with a complete inspection report and certificate of conformity; Support customized manual/electric operation modes and special protection schemes, can be used with high-voltage standard matching handcarts, and accessories are supplied in a timely manner
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Specification
| Item | Unit | Data | ||||
| Rated voltage | kV | 20 | ||||
| Rated frequency | Hz | 50 | ||||
| Rated insulation level | 1-minute power frequency withstand voltage (effective value) | kV | 60 | |||
| Lightning impulse withstand voltage (peak value) | kV | 145 | ||||
| Rated current | A | 630 | 630 | 1250 | 1600 | |
| 1250 | 1250 | 1600 | 2000 | |||
| 2000 | 2500 | |||||
| 2500 | 3150 | |||||
| 4000 | ||||||
| Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 | |
| Rated short-time withstand current | 20 | 25 | 31.5 | 40 | ||
| Rated short-circuit closing current | 50 | 63 | 80 | 100 | ||
| Rated peak withstand current | 50 | 63 | 80 | 100 | ||
| Rated short-circuit duration | S | 4 | ||||
| Rated operating sequence | O – 0.3s – CO – 180s – CO | |||||
| Split 180s Split 180s Split (40kA) | ||||||
| Rated short-circuit current breaking times | 30/20 | |||||
| Mechanical lifespan | 10000 | |||||
| Rated breaking current of a single capacitor bank | 630 | |||||
| Rated back-to-back capacitor bank breaking current | 400 | |||||
| Grounding fault breaking current of different phases | kA | 10 | ||||
| Allowable wear and accumulated thickness of dynamic and static contacts | 3 | |||||
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FAQs
What are the core differences between 20KV VS1 circuit breaker and 15KV, 17.5KV models?
The core differences lie in the breaking capacity, insulation level, and scene positioning, which are not interchangeable. The 20KV model has a larger breaking capacity (50-63kA), higher insulation level, and adopts a heavy-duty structure, focusing on heavy load distribution network backbone, large energy bases and other high current scenarios; The 15KV model focuses on domestic medium and high voltage transition scenarios, with lower breaking currents; The 17.5KV model is mainly used in special medium and high voltage scenarios involving foreign affairs, with the core advantage of dual standard compatibility. Its breaking and insulation performance is between the two, and it cannot adapt to the ultra-high current requirements of 20KV scenarios.
Can this product be used for the distribution network system of large new energy bases?
Sure. This product is designed specifically for large new energy bases, with a rated voltage of 20KV and a breaking current of 50-63kA, suitable for the ultra high current load of new energy bases. It can adapt to the intermittent and fluctuating load characteristics of photovoltaic and wind power, and can be responsible for the collection, transmission control, and protection of power in energy bases. It can quickly cut off fault currents, avoid faults affecting power output, and support intelligent monitoring and scheduling. It can seamlessly integrate with new energy control systems to ensure efficient and stable operation of energy bases.
What are the advantages of closing bounce time ≤ 1.5ms compared to ordinary models?
There are two main advantages: firstly, it significantly reduces contact wear, lowers contact resistance, avoids contact overheating and burning, prolongs the service life of the arc extinguishing chamber and contacts, and reduces operation and maintenance costs; The second is to improve the reliability of opening and closing, reduce hidden dangers such as arc reignition and insulation damage caused by closing bounce, especially suitable for ultra high current scenarios, which can effectively avoid the expansion of faults and ensure the safe and stable operation of equipment and distribution network, far exceeding the performance of ordinary models (≤ 2ms).
What special modifications are required for use in high-altitude and high-altitude environments?
High altitude (>2500m) scenario: Optimize the thickness of the insulation cylinder, increase the anti creepage distance, strengthen the sealing of electrical components, and avoid insulation degradation and arc extinguishing difficulties caused by low air pressure; High cold (below -35 ℃) scenario: Customize a low-temperature adaptive operating mechanism, use low-temperature resistant lubricating grease and components to avoid mechanical jamming and insufficient energy storage caused by low temperature, and install anti condensation and anti freezing devices to ensure the normal operation of the equipment in high cold environments.
What is the specific function of the trend analysis and warning function of the intelligent monitoring system?
This function can collect real-time device operating parameters (current, voltage, temperature, vacuum degree, etc.), and achieve trend warning through data analysis. When the parameters fluctuate abnormally or approach the warning value, a warning signal is sent in advance to remind the staff to investigate hidden dangers. The core function is to transform passive fault handling into active hazard warning, avoid equipment failure shutdown, reduce power outage time, lower operation and maintenance costs, and at the same time, develop scientific operation and maintenance plans based on trend data to extend equipment service life.
Related Applications
Upgrading of urban high-voltage distribution network backbone: Suitable for the scenario of upgrading and renovating urban high-voltage distribution network backbone lines. With the significant increase in urban electricity load, this product has a rated voltage of 20KV and a breaking capacity of 50-63kA, which can meet the ultra-high current demand after the distribution network upgrade. It is used for controlling and protecting the backbone lines in urban core areas and high load areas, improving the power supply capacity and reliability of urban distribution networks, reducing the time of power outages, and adapting to the development trend of urban intelligent distribution network upgrade.
Supporting Distribution Network for Large New Energy Bases: Used for supporting high-voltage distribution networks for large-scale energy bases such as million kilowatt photovoltaic power stations, large wind farms, and hydropower stations. It is responsible for the collection, transmission control, and protection of power in the energy base, and can withstand intermittent, fluctuating loads and super large current impacts of new energy generation. It can quickly cut off fault currents, avoid faults affecting the power output of the energy base, and support intelligent monitoring and scheduling to ensure efficient and stable operation of the energy base.
Large substation outgoing circuit: The 20KV outgoing circuit used for 220KV and 110KV large substations is the core hub for power transmission between substations, urban high-voltage distribution networks, and large industrial enterprises. It is responsible for controlling the outgoing circuit, overload and short-circuit protection, and reclosing operations. It can reliably carry the high current load output by substations, quickly handle line faults, ensure safe and stable power transmission, and adapt to the automation operation and maintenance needs of substations.
High voltage distribution network for ultra large industrial enterprises: Suitable for the high voltage distribution network of large refining, heavy equipment manufacturing, large steel mills and other ultra large industrial enterprises with high electrical loads and equipment power. This product can be responsible for the power supply control and fault protection of enterprise high voltage incoming lines, main distribution lines and large production equipment. It can withstand the impact current of large equipment start-up, quickly cut off the fault current, avoid production interruption, and ensure safe and efficient production of enterprises.
