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VS1-6
VS1-6 Vacuum Circuit Breaker
The 6KV VS1 circuit breaker is an indoor AC high-voltage vacuum circuit breaker suitable for the core scenarios of medium voltage distribution networks. It is designed specifically for industrial enterprises, industrial parks, small and medium-sized substations, and urban distribution network backbone branches. It is compatible with three-phase 50Hz power frequency AC circuits, with a rated voltage of 6KV. Its core function is to achieve circuit control, overload and short-circuit protection, and reclosing operation. This product adopts an integrated modular design of mechanism and circuit breaker, balancing compactness and operational reliability. It can be flexibly installed in two forms: fixed and withdrawable handcart, and is suitable for installation in various specifications of medium voltage switchgear.
The product is manufactured strictly in accordance with standards such as GB1984, DL/T403, and IEC60056. It adopts high vacuum arc extinguishing technology, with high vacuum degree in the arc extinguishing chamber, fast recovery speed of insulation after arc, no harmful gas emissions, and no noise pollution. It can effectively cope with complex load conditions of medium voltage distribution network, quickly cut off fault current, and ensure the safe and stable operation of medium voltage distribution network and industrial equipment. It is suitable for working environments with altitude ≤ 4500m (non-standard review required) and ambient temperature of -25 ℃~40 ℃. It is the core protection and control equipment of medium voltage distribution network.
Features
1. Excellent breaking performance, suitable for complex working conditions:
using high-quality copper chromium contact material and cup-shaped longitudinal magnetic field contact structure, the vacuum degree of the arc extinguishing chamber is high, the insulation recovery speed after arc is fast, and the rated short-circuit breaking current can reach 25-31.5kA, which can reliably break various types of power loads and short-circuit currents, adapt to the complex load fluctuations and reclosing operation requirements of medium voltage distribution network, with small current interception value, stable contact resistance, and high breaking reliability.
2. Reliable structure and long service life:
The spring energy storage operating mechanism adopts a flat layout with few components and reasonable layout. The mechanical service life can reach 20000~30000 times, and the electrical service life meets E2 level. The full capacity short-circuit current can be disconnected up to 50 times, which can adapt to the frequent operation needs of industrial scenes for a long time, reduce equipment replacement frequency, and lower the total life cycle cost.
3. Flexible installation and wide adaptability:
Supports two installation forms: fixed and withdrawable handcart. It can be installed in various specifications of switchgear such as central cabinets, double-layer cabinets, and fixed cabinets, and can also be installed separately on frames for use. It can adapt to the layout requirements of different installation scenarios such as industrial parks and substations. The handcart model can achieve live extraction maintenance, reduce power outage range and downtime, and improve operation and maintenance efficiency.
4. Intelligent adaptation, strong upgradability:
Reserved intelligent control interface, can be matched with intelligent monitoring unit to achieve remote operation, fault self diagnosis, real-time monitoring of operating status (current, voltage, temperature, energy storage status) and other functions, adapting to the intelligent upgrade needs of medium voltage distribution network; Support linkage with distribution network automation systems to achieve fault location, automatic reclosing, and improve the reliability of distribution network power supply, in line with the development trend of smart grids.
5. Safe and environmentally friendly, easy to maintain:
Adopting vacuum arc extinguishing technology, there is no oil, gas, or dust pollution, eliminating the hidden dangers of fire, explosion, and harmful gas leakage, which meets the environmental protection requirements of modern power equipment; Ordinary daily maintenance only requires intermittent cleaning or lubrication of the operating mechanism, while the fixed sealed pole type achieves maintenance free operation and maintenance with low workload, suitable for efficient operation and maintenance needs in industrial scenarios. At the same time, it has a complete anti misoperation interlock function to ensure operational safety.
The rated current of this product covers 1250A~3150A, and the rated short-time power frequency withstand voltage (1min) can reach 42kV (relative to ground, phase to phase), 48kV (fracture), and the rated lightning impulse withstand voltage (peak) can reach 75kV (relative to ground, phase to phase), 85kV (fracture). The rated short-circuit duration is 4s, the closing time is 35-70ms, the opening time is 20-50ms, the closing bounce time is ≤ 2ms, and the opening and closing asynchrony is ≤ 2ms, meeting the load requirements of medium voltage distribution network and industrial equipment.
The suitable environmental conditions are: daily average relative humidity not exceeding 95%, monthly average not exceeding 90%, earthquake intensity not exceeding 8 degrees, no severe vibration, chemical corrosion, explosion hazard, and serious pollution in places. Protection upgrade plans can be customized according to special scenarios such as high temperature, high humidity, and high pollution (such as anti-corrosion coatings and reinforced insulation).
The product meets the KEMA type test A-level certification standard, has undergone strict type testing and factory inspection, and comes with a complete inspection report and certificate of conformity. Support customization of products with different rated breaking currents, operating modes (manual/electric), and installation forms. They can be used with matching products such as fuse handcarts, isolation handcarts, and voltage transformer handcarts to meet personalized needs in different scenarios. At the same time, they are interchangeable with similar domestic products, and the supply of accessories is convenient.
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Specification
| Item | Unit | Data | ||||
| Rated voltage | kV | 6 | ||||
| Rated frequency | Hz | 50 | ||||
| Rated insulation level | 1-minute power frequency withstand voltage (effective value) | kV | 23 | |||
| Lightning impulse withstand voltage (peak value) | kV | 46 | ||||
| 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 is the difference between withdrawable handcart type and fixed type of 6KV VS1 circuit breaker, and how should I choose?
The core difference lies in the convenience and cost of maintenance: the withdrawable handcart type allows the circuit breaker to be pulled out of the cabinet for maintenance when it is live, without the need to cut off the power supply of the entire switchgear, reducing the range and downtime of power outages. It is suitable for scenarios such as industrial parks and substations that require high power continuity, but the cost is slightly higher; The fixed structure is simple and cost-effective. During maintenance, the power supply of the switchgear needs to be cut off. It is suitable for small industrial plants and distribution network branch scenarios with low requirements for power supply continuity and limited budget. It can be selected according to its own power supply reliability needs and budget.
Can this product be used in industrial scenarios with frequent operations?
Sure. This product adopts a mature spring energy storage operating mechanism, with a mechanical life of up to 20000~30000 times and a full capacity short-circuit current breaking frequency of up to 50 times. It can perform frequent operations within the working current range and is suitable for the frequent start and stop needs of equipment such as fans, water pumps, compressors, etc. in industrial scenarios such as metallurgy and chemical industry. At the same time, it has excellent breaking performance and can ideally meet inductive and capacitive loads. It is not prone to faults during long-term operation and has high operational stability.
What are the effects of prolonged closing bounce time on the product and how should it be handled?
If the closing bounce time is too long (more than 2ms), it will accelerate the wear of the contacts and increase the contact resistance. Long term use may cause overheating and burning of the contacts, and even affect the arc extinguishing performance, leading to disconnection faults. Solution: First check the energy storage status and lubrication condition of the operating mechanism. If the energy storage is insufficient, supplement the energy storage. If the lubrication is insufficient, add specialized lubricating oil; If the problem still persists, check the contact gap and closing buffer device, adjust the contact gap to the standard range, or replace the buffer component. It is recommended to have a professional debug it.
Can this product be interchangeable with 6.6KV VS1 circuit breaker?
It is not allowed. The rated voltage of the two is different (6KV vs 6.6KV), and there are differences in the insulation level, contact specifications, and electrical parameters of the arc extinguishing chamber. The 6KV model cannot withstand the voltage load of the 6.6KV circuit, and forced interchangeability can lead to arc extinguishing failure, equipment burnout, and even safety accidents; It is necessary to select the corresponding model based on the actual rated voltage of the circuit to ensure that the voltage level is completely matched.
Can remote fault location be achieved after intelligent upgrade?
Sure. After upgrading the intelligent control unit, the product can monitor the operating status (current, voltage, temperature, etc.) in real time. When faults such as overload, short circuit, and contact overheating occur, a fault alarm signal will be immediately sent, and the fault type and location will be accurately fed back. Staff can remotely view the fault information without on-site investigation, greatly improving the efficiency of fault handling, reducing power outage time, and supporting remote reset and operation, further enhancing the convenience of operation and maintenance.
Related Applications
Industrial Park Distribution Network System: As the core control and protection equipment of the industrial park distribution network, it is used for distribution control of the main lines and partitioned distribution rooms in the park, covering various park enterprises such as mechanical manufacturing, electronics, and light industry. It is responsible for controlling the power supply of production equipment, office electricity, and public facilities in the park, quickly cutting off fault currents, avoiding fault propagation, ensuring the continuity and stability of the overall power supply in the park, and adapting to the intelligent distribution network upgrade needs of the park. It can achieve remote operation and maintenance and fault location.
Small and medium-sized substations: used for medium voltage side distribution protection of small and medium-sized substations, adapted to 6KV outgoing circuits of 110KV/35KV substations, responsible for power transmission control and protection between substations and industrial parks, urban distribution networks, realizing circuit opening and closing, overload and short circuit protection, and reclosing operations to ensure the safety and reliability of power transmission. At the same time, it can be equipped with intelligent control systems to achieve substation automation operation and maintenance, reduce manual duty workload, improve operation and maintenance efficiency and power supply reliability.
Production workshops of large and medium-sized industrial enterprises: adapted to the power distribution of production workshops of metallurgical, chemical, building materials and other large and medium-sized industrial enterprises, such as the main power distribution of steel mills and cement plants, responsible for controlling the power supply of high-power production equipment such as large fans, water pumps, compressors in the workshop, able to adapt to frequent operation and complex load fluctuations in industrial scenarios, accurately cut off overload and short circuit faults, avoid equipment damage and production interruption, and have the advantages of safety, environmental protection and convenient maintenance, adapting to the efficient production needs of industrial workshops.
Urban distribution network backbone branch: used for branch protection of urban distribution network backbone lines, such as distribution network branches on urban main roads and large communities. It is responsible for cutting off the fault current of branch lines, avoiding the spread of faults to the backbone network, ensuring the safety and stability of urban residents’ daily life and commercial electricity consumption. At the same time, it can be linked with the urban distribution network automation system to achieve automatic fault location and automatic reclosing, improve the reliability of urban distribution network power supply, reduce power outage time, and adapt to the development needs of urban intelligent distribution network.
New energy supporting distribution network: Used as a supporting distribution network system for small photovoltaic power plants and wind power plants, responsible for the output transmission control and protection of photovoltaic panels and wind turbines, adapting to the intermittent and fluctuating load characteristics of new energy generation, possessing excellent disconnection performance and intelligent control capabilities, and can be linked with new energy control systems to achieve stable power transmission and rapid fault handling, ensuring the safe and stable operation of new energy generation systems. At the same time, it supports intelligent monitoring and real-time grasp of power generation and distribution status.
