China Vacuum Interrupter for LBS Manufacturers Suppliers Factory

You Professional Vacuum Interrupter for LBS Manufacturers

Zhejiang Shone Vacuum Electrical Apparatus Co., Ltd. is the specialized pressure vacuum breaker, vacuum interrupter production of high manufacturers. The company is located in Hangzhou high tech Development Zone, convenient transportation, superior production environment. product design reasonable, advanced technology, strict inspection, development speed, product quality and stability.

Why Choose Us

Rich Experience
The company not only with the production of vacuum devices need all kinds of advanced equipment and testing equipment, but also has professional and technical personnel engaged in research, production of vacuum device and a rich experience of manufacturing, high quality staff team.

Stable Quality
The company has advanced production lines and testing equipment, and each product undergoes strict inspection before shipment. We are devoted to creating high quality products and the stability of electricity transmission and distribution systems of state grid, and to be the national first-class enterprise in this area.

One-stop Services
We will provide the most suitable solution according to your needs. Any problems that arise during use will be tracked and solved by our customer service staff.

Vacuum Interrupter for Load Break
In the field of electrical engineering, a vacuum interrupter is a sophisticated switching device that employs electrical contacts housed within a vacuum-sealed enclosure. This technology serves as...
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Vacuum Interrupter for Load Break Switch
A vacuum interrupter utilizes a high vacuum environment to extinguish the arc that forms between a pair of contacts. As the contacts begin to separate, the current initially flows through a...
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Bottle for Load Break Switch
A vacuum interrupter typically consists of one fixed contact and one moving contact, a flexible bellows that allows the movement of the moving contact, and arc shields enclosed within a...
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Vacuum Circuit Breaker Interrupter
In electrical engineering, a vacuum interrupter is a switch which uses electrical contacts in a vacuum. It is the core component of medium-voltage circuit-breakers, generator circuit-breakers, and...
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Vacuum Interrupter Tube
Vacuum Interrupter Tube, or Vacuum Interrupter Chamber, is an interrupter chamber that uses vacuum as the interrupting medium, also known as Vacuum Interrupter Tube. Its main function is to...
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Vacuum Interrupter for Load Break Switch

Features of Vacuum Interrupter for LBS

Low maintenance. LBSs are built to remain in operation for more than 30 years without major maintenance due to the highest quality materials used in its construction.

Live tank construction. It completely eliminates the occurrence of internal arc faults and the risk of explosion or destruction inside the switch tank. That makes it repairable in case one of the poles is damaged. It provides improved cooling of the vacuum interrupters due to unhindered air circulation. It has the increased creepage distance that allows the use of products in an environment with a 4th degree of atmospheric pollution and cleaning of insulation without dismantling;

Solid epoxy insulation of bushings and insulators. Silicon coating provides UV protection, is environmentally friendly, does not contain harmful SF6 gas or oil;
Vacuum interrupter bottles that can handle 20kA faults for 3s guarantee long term problem free operation in networks with many high current faults;

Highest quality stainless steel is used for most of the parts to minimize electrochemical corrosion. The use of stainless steel in accordance with DIN50049 / 3.1B, thanks to its non-magnetic properties, completely eliminates the occurrence of any kind of corrosion, including electrochemical corrosion over the entire life of the product;

Spring stored energy operating mechanism. It provides turning On and Off the switch module even in the complete absence of power supply (voltage transformer malfunction, full battery discharge);

Manual charging of the spring mechanism as well as switch operation On and Off are possible with the help of maneuvering arms located on a switch body. The spring capacity is enough for the full reclosing cycle (Off - On - Off);

Built in disconnector (applicable for 120 and 240 models only) gives visible open points of all three phases for extra safety. The disconnector is synchronized with the vacuum interrupter and cannot be open or closed when the vacuum interrupter is closed;

Technical Specification of Vacuum Interrupter for LBS

Description	LBS120/121	LBS240/241	LBS405
Rated operation voltage, VDC	24-48-110	24-48-110	24-48-110
Rated maximum voltage, kV	12/15	24/27	40
Rated basic impulse level, P>P, kV	85	145	185
Rated basic impulse level, P>E, kV	75	125	170
Power frequency withstand, Dry, kV	60	60	70
Power frequency withstand, Wet, kV	45	50	60
Rated power, W	40	40	40
Rated continuous current, A	630/1250	630/1250	1200
Rated fault making current, kA	50	50	42
Rated fault breaking current, kA	20	20	16
Cable charging current, A	20/40	20/40	40
Line charging current, A	5/10	5/10	5
Rated fault duration time, s	3	3	3
Contact resistance, VCB, µΩ	< 35	< 35	< 40
Contact resistance, ABI, µΩ	< 60/NA	< 60/NA	NA
Network frequency, Hz	50/60	50/60	50/60

Production Process of Vacuum Interrupter

Components of the vacuum interrupter must be thoroughly cleaned before assembly, since contaminants could emit gas into the vacuum envelope. To ensure a high breakdown voltage, components are assembled in a cleanroom where dust is strictly controlled.

After the surfaces have been finished and cleaned by electroplating and an optical inspection of the surface consistency of all single parts has been performed, the interrupter is assembled. High-vacuum solder is applied at the joints of the components, the parts are aligned, and the interrupters are fixed. As cleanliness during assembly is especially important, all operations are done under air-conditioned clean-room conditions. In this way the manufacturer can guarantee a constantly high quality of the interrupters and maximum possible ratings up to 100 kA according to IEC/IEEE 62271-37-013.

Subassemblies of vacuum interrupters were initially assembled and brazed together in a hydrogen-atmosphere furnace. A tube connected to the interrupter's interior was used to evacuate the interrupter with an external vacuum pump while the interrupter was maintained at about 400 °C (752 °F). Since the 1970s, interrupter subcomponents have been assembled in a high-vacuum brazing furnace by a combined brazing-and-evacuation process. Tens (or hundreds) of bottles are processed in one batch, using a high-vacuum furnace that heats them at temperatures up to 900 °C and a pressure of 10−6 mbar.[6] Thus, the interrupters fulfill the quality requirement "sealed for lifetime". Thanks to the fully automatic production process, the high quality can be constantly reproduced at any time.

Then, the evaluation of the interrupters by means of the X-ray procedure is used to verify the positions as well as the completeness of the internal components, and the quality of the brazing points. It ensures the high quality of vacuum interrupters.

During forming, the definitive internal dielectric strength of the vacuum interrupter is established with gradually increasing voltage, and this is verified by a subsequent lightning impulse voltage test. Both operations are done with higher values than those specified in the standards, as evidence of the quality of the vacuum interrupters. This is the prerequisite for long endurance and high availability.

Construction of Vacuum Circuit Breaker

When compared to other circuit breakers, it is extremely simple to construct. Fixed contacts, moving contacts, and an arc shield that is positioned inside the arc interrupting chamber make up the majority of their construction.

The vacuum circuit breakers exterior envelope is composed of glass, which aids in the evaluation of the breaker from the outside after operation. If the glass turns milky instead of its usual silvery mirror polish, it means the breaker is losing vacuum.

The breakers fixed and movable contacts are located inside the arc shield. When a vacuum interrupter is sealed off, the pressure is held at around 10-6 torr. Depending on the working voltage, the circuit breaker's movable contacts move a distance of 5 to 10 mm.

The stainless steel metallic bellows are utilised to move the moving contacts. Because the life of the vacuum circuit breaker is dependent on the component's capacity to execute repeated operations satisfactorily, the design of the metallic bellows is critical.

Installation of Vacuum Interrupter for LBS

●When the vacuum interrupter is in operation, it must have a guiding device. The coaxiality of the whole pipe axis is met by the use of the moving conductive rod, and the bellows is not subject to the torsion;
●During installation, it is strictly forbidden to hit or knock the pipe casing with hard objects to avoid breakage and air leakage, and prevent the glass casing from being scratched. Otherwise, the glass will be easily broken after being subjected to heat during the breaking process;
●Pay attention to ensure the coaxiality of the conductive rod of the vacuum interrupter or the perpendicularity with the end face of the fixed end;
●Be careful not to disassemble the vacuum interrupter repeatedly to prevent the connection of the buckling buckle; nor to twist the conductive rod and excessively compress the bellows to avoid the torque and scratch of the bellows and affect the service life.

Our Certificate

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FAQ

Q: What is a LBS breaker?

A: Load break switches that ensure both on-load switching and isolation. These devices guarantee the safety of the operator during the entire life cycle of your low-voltage electrical facility.

Q: What is the use of vacuum interrupter?

A: Vacuum interrupter technology is used for repetitive switching, motor inrush current interruption, fault protection, overcurrent, and short-circuit protection. The vacuum interrupter is a pair of separable contacts (primary contacts), enclosed in a vacuum-tight envelope.

Q: What is the difference between lbs and VCB?

A: The load switch does not need to break the short-circuit current, so it is not equipped with protection device and automatic device, and basically does not use remote operation; the rated current of the vacuum circuit breaker is 0~5000A, not only to open and close the rated current, but also to be able to cut off The ...

Q: What is the mainly application of vacuum circuit breaker?

A: Vacuum circuit breaker: A breaker that is used a vacuum as an arc quenching medium is called a vacuum circuit breaker. The arc is extinct as the contacts are separated in a high vacuum. It is mainly used for medium voltage ranging from 22 kV to 66 kV.

Q: What is the life of a vacuum interrupter?

A: Most vacuum interrupters have a shelf life of about 20 years. But many units installed in the 1970s and 1980s are still in service today.

Q: What is your lead-time?

A: Standard lead-times for all manufactured products average 6-8 weeks (ADA), with drawings 3-4 weeks (ARO). Lead-times can vary due to order activity, product mix and time of year.

As one of the leading vacuum interrupter for lbs manufacturers and suppliers in China, we warmly welcome you to buy high quality vacuum interrupter for lbs at competitive price from our factory. Contact us for customized service.

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