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Vacuum Interrupter Bottle For High Voltage Circuit Breaker
Vacuum Interrupter Bottle For High Voltage Circuit breaker
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Vacuum Interrupter Bottle For High Voltage Circuit breaker
Vacuum interrupter, also known as vacuum switch tube, is the core component of the medium and high voltage power switch, its main role is that, through the excellent insulation of the vacuum inside the tube to make the medium and high voltage circuit cut off the power supply can quickly extinguish the arc and inhibit the current, to avoid accidents and accidents, mainly used in power transmission and distribution control systems, but also used in metallurgy, mining, petroleum, chemical, railway, broadcasting, communications, industrial high frequency heating and other power distribution system. It has the characteristics of energy saving, material saving, fire prevention, explosion-proof, small volume, long life, low maintenance cost, reliable operation and no pollution. The vacuum interrupter room is divided into interrupter room for circuit breaker and interrupter room for load switch. The interrupter room for circuit breaker is mainly used for substation and grid facilities in the electric power sector, and the interrupter room for load switch is mainly used for end users of the grid.
The outer casing of the vacuum interrupter is made of insulating material (ceramic or glass), and the two ends are sealed with a metal cover to form a closed container. There are a pair of contacts inside, the static contact is fixed on the static conductive rod, and the movable contact is fixed. On the moving rod. Since the bellows is sealed between the movable conductive rod and the metal cover, the movable conductive rod can move in the axial direction to drive the contacts to complete the splitting and closing action.
The bellows of the vacuum interrupter chamber is mainly responsible for ensuring the movement of the dynamic electrode within a certain range and maintaining a high vacuum for a long time, as well as ensuring that the vacuum interrupter chamber has a high mechanical life.
The bellows of the vacuum interrupter is a thin-walled component made of stainless steel with a thickness of 0.1 to 0.2 mm. In the process of dividing and closing the vacuum switch, the bellows of the interrupter chamber is subjected to expansion and contraction, and the bellows section is subjected to variable stress, so the life of the bellows should be determined according to the repeated expansion and contraction and the use of pressure.
The fatigue life of the bellows is related to the working conditions of the heated temperature. After the vacuum interrupter chamber has broken up a large short-circuit current, the residual heat of the conductive rod is transferred to the bellows, causing the temperature of the bellows to rise, and when the temperature rise reaches a certain level, this affects the fatigue strength of the bellows.We supply many types. (250A, 2.5KA), (400A, 4KA), (400A, 6.3KA), (630A, 6.3KA), (1250A, 2.5KA), (1250A, 4KA), (1250A, 6.3KA)
The working principle of vacuum interrupter
The vacuum interrupter in the vacuum bubble is an electric vacuum device that uses a high vacuum insulating interrupting medium and relies on a pair of contacts sealed in the vacuum to achieve the on-off function of the electric circuit. When it disconnects a certain value of current, the static and dynamic contacts in the moment of separation, the current contraction to the point of contact just separated, there is a sharp increase in resistance between the electrodes and the temperature increases rapidly, until the electrode metal evaporation, while forming a very high electric field strength, resulting in a very strong emission and gap breakdown, resulting in vacuum arc, when the frequency current is close to zero, but also the increase in contact opening distance, the vacuum arc The plasma quickly spreads around, and after the arc current has passed zero, the medium of the contact gap quickly changes from conductor to insulator, and the current is broken off. Due to the special structure of the contact, the contact gap will produce a proper longitudinal magnetic field during the arc, this magnetic field can make the arc evenly distributed on the contact surface, maintain a low arc voltage, so that the vacuum interrupter has a high recovery rate of the medium strength after the arc, small arc energy and small corrosion rate. In this way, it improves the ability of the vacuum interrupter to open the current and its service life.
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Main technical data
Rated voltage 12kV Rated current 250/400/630A Rated frequency 50Hz Rated short-time power frequency withstand voltage(1 min) 42kV Rated lighting impulse withstand voltage 75kV Rated making current 2.5/4.0/6.3kA Rated breaking current,max 2.0/3.2/5.0kA Rated breaking current,min 50/80/125A Rated making current,limit 2.5/4.0/6.3kA Rated short-time withstand current 2.5/4.0/6.3kA Rated duration of short-circuit 4s Mechanical life 30* 104 times Electricity life AC-3 25* 104 times Electricity life AC-4 10* 104 times Rated contact stroke 6±1mm Contact closing force due to bellows and atmosphere 70±30N Counter force at rated contact stroke 110±40N Circuit resistance at rated contact atmosphere force ≦55μΩ Shelf life 20 years Contact erosion limit 3mm Weight of moving parts ≦0.4kg Mechanical data required for matching vacuum switchgear
Added contact force 110±10N Average opening speed 0.6±0.2m/s Average closing speed 0.3±0.1m/s Contact bouncing duration at closing operation ≦2ms Contact bouncing bank amplitude of opening operation ≦2mm Three-pole simultaneity ≦1ms Circuit Breaker Vacuum Interrupter Drawing Reference
Drawing Vacuum interrupter for circuit breaker
drawing Vacuum interrupter for circuit breaker
About us
We are specialty on providing medium voltage and high voltage circuit breaker and switchgear components, such as 12KV, 24 KV, 36KV and 40.5KV embedded cylinder, insulated operating rod, auxiliary circuit socket, counter, circuit breaker board, vacuum circuit breaker plastic panel, connection terminal, vacuum Interrupter and so on. These components apply on 630A, 1250A, 2500A, 3150A and 4000A VS1 (ZN85-40.5) circuit breaker and KYN28A-12 and KYN61 high voltage switchgear.
Our Advantages
1. Strict quality control and excellent after-sales service.
2. Experienced staffs answer all of your question in fluent English.
3. Customized design is available. OME&ODM are welcomed.
4. Exclusive and unique solution can be provided to our customer by our well-trained and professional engineers and staffs.
