China Vacuum Interrupter for VCB Manufacturers Suppliers Factory

You Professional Vacuum Interrupter for VCB 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 Vacuum Circuit Breaker
The vacuum interrupter, also referred to as a vacuum switch tube, constitutes a critical element within high-voltage power switching devices. This component's primary function is to extinguish...
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Vacuum Interrupter for MV VCB
The manufacturing process of vacuum interrupters ensures they are "sealed for lifetime," eliminating the need for ongoing monitoring systems or periodic tightness tests as stipulated in IEEE...
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Vacuum Interrupters for Circuit Breaker
The adoption of vacuum technology for the switching of electrical currents was driven by the realization that a one-centimeter gap within an X-ray tube could sustain voltages in the tens of...
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Medium Voltage Vacuum Interrupter
Vacuum interrupter is the core component of the circuit breaker, which is composed of ceramic cylindrical tube section, metal cover and internal contacts.Medium-voltage vacuum circuit breaker is a...
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High Voltage Vacuum Interrupter
High voltage vacuum interrupter, also called vacuum switching tube, is the core component of medium and high voltage power switch. Its role is to allow medium and high voltage circuits to cut off...
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Low Voltage Vacuum Interrupter
Low Voltage Vacuum Interrupter is an electrical device that utilizes vacuum as an arc extinguishing medium, with the core component being a pair of electrodes (contacts) sealed in vacuum and other...
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Vacuum Interrupter for Low VCB
A vacuum interrupter is a switch that uses vacuum electrical contacts in electrical engineering. It is a core component of medium voltage circuit breakers, generator circuit breakers, and high...
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Standard Current Vacuum Interrupter
The Standard Current Vacuum Interrupter is a core component of a high-voltage power switch. It can use its insulating properties in a vacuum to cut off arcs and quickly suppress current. Its main...
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Large Current Vacuum Interrupter
Large Current Vacuum Interrupter is a vacuum interrupter specially designed for interrupting large current loads. Compared with standard current interrupters, it can handle higher currents and is...
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11KV Vacuum Interrupter
11KV Vacuum Interrupter is a vacuum interrupter for 11 kilovolt (KV) power systems. It uses vacuum media to quickly extinguish arcs, thereby effectively interrupting current and protecting...
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High Voltage Interrupter
High Voltage Interrupter is a current interruption device used in high voltage power systems. It can quickly cut off the current when a current fault occurs to protect power equipment from damage....
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Molded Vacuum Interrupter
Molded Vacuum Interrupter is an interruption device that uses vacuum arc extinguishing technology and is commonly used in high-voltage power systems. Unlike traditional vacuum interrupters, the...
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Advantages of Vacuum Interrupter for VCB

High Dielectric Strength
The vacuum inside the breaker has high dielectric strength, making VCBs highly effective at interrupting high voltage currents. This characteristic allows for compact designs as the distance required between contacts to quench the arc is significantly reduced compared to air circuit breakers.

Long Operational Life
VCBs are renowned for their durability and long operational life. The vacuum environment minimizes the erosion of the contacts due to arcing, ensuring that the circuit breaker can operate for many thousands of cycles without significant maintenance.

Minimal Maintenance

One of the most significant advantages of VCBs is their low maintenance requirements. The sealed vacuum interrupters do not degrade over time as air or oil interrupters do, which means that VCBs require less frequent inspections and servicing, leading to lower operational costs over their lifecycle.

Quick Recovery

VCBs are capable of interrupting and establishing currents very quickly, which is crucial for protecting electrical equipment and systems from damage during fault conditions. Moreover, the dielectric strength of the vacuum recovers rapidly after arc extinction, allowing the circuit to be restored swiftly.

Environmentally Friendly

Unlike SF6 circuit breakers, VCBs do not use sulfur hexafluoride gas, which is a potent greenhouse gas. This makes VCBs a more environmentally friendly option for medium-voltage applications, aligning with global efforts to reduce carbon footprints and combat climate change.

Specification of Vacuum Interrupter for VCB

Type of VI	Rated voltage	Rated current	Rated breaking current	Dimensions
Type of VI	Rated voltage	Rated current	Rated breaking current	Diameter	Length
SVB-6H8B	7.2kV	400A	8kA	56mm	134mm
SVB-6J13	3.6/7.2kV	630A	16/12.5kA	67.5mm	134mm
SVB-6J13S1(*1)	3.6/7.2kV	630A	16/12.5kA	67.5mm	134mm
SVB-6M20S(*1)	3.6/7.2kV	1250A	25/20kA	102mm	238mm
SVB-6Q63	7.2kV	3000A	63kA	150.5mm	234mm
SVB-10M25E	12kV	1250A	25kA	94mm	238mm
SVB-10M40E	12kV	1250A	40kA	102mm	238mm
SVB-10P25E	12kV	2000A	25kA	82mm	230mm
SVB-10P40E	12kV	2000A	40kA	102mm	230mm
SVB-10Q40E	12kV	3150A	40kA	116mm	230mm
SVB-10Q50	12kV	3150A	50kA	150.5mm	234mm
SVB-10R40E	12kV	4000A	40kA	150.5mm	247.5mm
SVB-10M25E1(*2)	12kV	1250A	25kA	104mm	238mm
SVB-10M32E1(*2)	12kV	1250A	31.5kA	112mm	238mm
SVB-10M40E1(*2)	12kV	1250A	40kA	112mm	238mm
SVB-10P40E1(*2)	12kV	2000A	40kA	112mm	230mm
SVB-10Q40E1(*2)	12kV	3150A	40kA	126mm	230mm
SVB-10Q50A1(*2)	12kV	3150A	50kA	160.5mm	234mm
SVB-10R40E1(*2)	12kV	4000A	40kA	160.5mm	247.5mm
SVB-20M16	24kV	1250A	16kA	96mm	273mm
SVB-20M25	24kV	1250A	25kA	116mm	273mm
SVB-20P25	24kV	2000A	25kA	130mm	273mm
SVB-30P25	36kV	2000A	25kA	116mm	406mm
SVB-30P25H(*3)	36kV	2000A	25kA	116mm	303mm

Application of Vacuum Interrupter for VCB

Power Generation and Transmission: VCBs are commonly used in power generation plants and substations to protect electrical equipment and systems from overcurrents and short circuits.

Industrial Applications: They are used in industrial facilities for the protection of motors, transformers, and other electrical equipment.

Railway Systems: VCBs are used in railway systems for the protection of overhead lines, traction systems, and signaling equipment.

Commercial Buildings: They are used in commercial buildings for the protection of electrical distribution systems.

Construction of Vacuum Circuit Breakers

The VCB construction is divided into 3 main components. These components work together as a unit to help trip the electricity in case of an overload.
Here is the construction of a vacuum circuit breaker.
●External Layer
●Arc shield that is placed within the arc interrupting chamber
●Fixed and moving contacts
●Vacuum interrupter

Install of Vacuum Interrupter for VCB

Vacuum circuit breakers are necessary to use routine inspections on site without a commitment from the manufacturer, avoiding blind confidence as much as possible.

Before installation, the appearance and internal inspection of the vacuum circuit breaker should be carried out, and the vacuum interrupter, all parts and components should be complete, qualified, non-destructive and free of foreign matter;

Strictly implement the requirements of the installation process regulations, and the fastener specifications installed by each component must be selected in accordance with the design regulations;

Check the distance between the poles, and the position distance between the upper and lower lines must meet the requirements of relevant professional and technical regulations;

The tools used must be clean and meet the requirements of assembly, tighten screws near the arc extinguishing chamber, and no live wrenches should be used;

Each rotating and sliding part should move freely, and the friction place should be coated with lubricating grease;

After the overall installation and debugging is qualified, it should be cleaned and wiped, the adjustable connection parts of each part should be marked with red paint, and the wiring at the outlet end should be coated with anti-corrosion grease.

Our Certificate

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FAQ

Q: What is vacuum interrupter in VCB?

A: 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 high-voltage circuit-breakers.

Q: What is the vacuum level of a VCB breaker?

A: 3- Medium Pressure
Open-air pressure is sufficient to quench the arc in air circuit breakers. On the other hand, VCBs must maintain a vacuum pressure ranging from 10-2 to 10-6 torr.

Q: How does an interrupter switch work?

A: An interrupter switch is a combination of an air disconnect switch and a circuit interrupter, which has a current interrupting rating, under specific circuit conditions, equal to or less than the continuous rating of the switch at rated voltage.

Q: What is the maximum voltage rating of a 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: How is a vacuum maintained in VCB?

A: The vacuum circuit breaker comprises a steel arc chamber in the center-symmetrically arranged ceramic insulators. The pressure inside the vacuum interrupter is maintained below 10^-4 torr. The material used for current carrying contacts plays an important role in the performance of the vacuum circuit breaker.

Q: How high should a vacuum breaker be?

A: Installation Guidelines:
A pressure vacuum breaker must be installed at least twelve inches above all downstream piping and outlets. The critical level (C/L) of the valve shall be the bottom of the valve body unless otherwise indicated. Must be installed where access for testing is feasible, safe and while in service.

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

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