Our company insists all along the quality policy of 'product good quality is base of enterprise survival; buyer fulfillment will be the staring point and ending of an company; persistent improvement is eternal pursuit of staff' and also the consistent purpose of 'reputation very first, shopper first' for Distribution Transformer, High Tension Switchgear, 10 kV Ring Main Unit. We will continue to meet the needs of our customers with our sincere reputation, advanced technology, reliable quality and satisfactory service. We welcome new and old customers from all walks of life to contact us for future business relationships and achieve mutual success! We not only have strong, mature production technology and perfect testing technology, but also have a professional, efficient and energetic service team.

Indoor Withdrawable Vacuum Circuit Breaker

The indoor withdrawable vacuum circuit breakers are suitable for three-phase AC power systems with rated voltages up to 12~24kV and frequency 50/60Hz. They are widely used in power plants, substations, petrochemicals, metallurgy, manufacturing and other industries, airports, residential areas, etc. Control and protect electrical equipment, especially for occasions that need to be operated infrequently at rated current or multi-circuit short-circuit current. It can be installed in indoor air-insulated switchgear such as KYN28 or AMS type.

The circuit breaker is made of mature APG technology. The application of VD4 terminal buffer ensures that the indoor terminal is more reliable in any operating environment. VD4 can fully meet the requirements of GB, DL, IEC, DIN, VDE and the standards of other advanced industrial countries.

The vacuum circuit breaker mainly consists of three parts: vacuum arc extinguishing chamber, operating mechanism, bracket, and other components.

1. Vacuum arc extinguishing chamber

According to the different types of switches, there are ceramic vacuum arc extinguishing chambers with external screens, small vacuum arc extinguishing chambers with intermediate sealed cup shaped longitudinal magnetic fields, and inner sealed glass bubble arc extinguishing chambers. The basic structure is as follows:

1) Airtight insulation shell

The airtight insulation system composed of a ceramic, glass or microcrystalline glass airtight insulation cylinder, a movable end cover, a fixed end cover, and a stainless steel corrugated pipe is a vacuum sealed container. To ensure airtightness, in addition to the strict operating procedures in the sealing type, the material itself is also required to have small breathability and internal gas release.

2) Conductive system

It is composed of a fixed conductive rod, a fixed running arc surface, a fixed contact, a moving contact, a moving arc surface, and a moving conductive rod. The contact structure can be roughly divided into three types: cylindrical contact, transverse magnetic field contact groove curved surface with spiral shape, and longitudinal magnetic field contact. At present, this type of arc extinguishing chamber adopts longitudinal magnetic field technology, which has strong and stable arc extinguishing ability.

3) Shielding system

Shielding cover is an indispensable component in the vacuum arc extinguishing chamber, and there are various types of shielding cover, such as the main shielding cover surrounding the contact point, corrugated pipe shielding cover, and voltage equalizing shielding cover. The function of the main shielding cover is as follows: ① To prevent products from splashing onto the inner wall of the insulation shell during the arc process, thereby reducing the insulation strength of the shell. ② Improving the uniformity of electric field distribution in the arc extinguishing chamber is beneficial for reducing local field strength and promoting the miniaturization of the vacuum arc extinguishing chamber Condensing arc products and absorbing some arc energy is beneficial for the recovery of the dielectric strength of the arc gap.

2. Operating mechanism

According to the different types of circuit breakers, different operating mechanisms are used. Common operating mechanisms include spring operating mechanism (VS1), permanent magnet operating mechanism, and combination operating mechanism (VBD).

Other parts: chassis vehicles, insulation brackets, insulators, etc.

What are the characteristics of vacuum circuit breakers

(1) Strong breaking capacity, up to 50kA; After fracture, the medium between the cracks recovers quickly and there is no need to replace the medium.

(2) The contact opening distance is small. The contact breaking distance of the 10kV vacuum circuit breaker is only about 10mm. The required operating power is small, the action is fast, the operating mechanism can be simplified, and the service life can be extended. Generally, maintenance is not required for around 20 years.

(3) Short arc extinguishing time, low arc voltage, low arc energy, low contact loss, and multiple interruptions.

(4) The mobile guide rod has small inertia and is suitable for frequent operation.

(5) When operating the switch, the action noise is low, making it suitable for urban use.

(6) Arc extinguishing or insulation media do not use oil, and there is no fire or explosion hazard.

(7) The contact head is a fully sealed structure, which will not reduce its performance due to the influence of moisture, dust, and harmful gases. Reliable operation and stable on-off performance. As an independent component, the arc extinguishing chamber is easy to install and debug.

(8) During the service life of the vacuum circuit breaker, the contact part does not require maintenance and inspection. Even if maintenance and inspection are carried out, the time required is very short.

(9) The arc is extinguished in a closed container, and the arc and hot gas are not exposed.

(10) Equipped with multiple reclosing functions, suitable for the application needs of distribution networks

Service environment for the high voltage vacuum circuit breaker (VCB)

a) Air temperature: highest temperature: +40ºC; lowest temperature: -25ºC

b) Humidity: The monthly average humidity is 95%; the daily average humidity is 90%.

c) Altitude: Maximum installation height: 2500m

d) There is obviously no ambient air polluted by corrosive and combustible gases, steam, etc.

Advantage:

Simple structure

Adapt to ultra-low resistance vacuum interrupter

Adaptation optimization and modular spring operation mechanism

Suitable for frequent operations

Free maintenance, long service life

Highly reliable performance

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FAQ

Q5 : Is OEM/ODM available?

A: Yes, it is! Our products can be Customized. We have design and engineer teams,we can customize products according to customers' drawing or requirements.

Q6 : You are manufacturer or trading company?
A: We are factory, As a 100% professional manufacturer with 20 year's manufacturer experience, we could produce products according to customers' requirements and we could also control the quality of products 100%.

Q7 : Can the price be negotiated?

A: Yes, the price is negotiable. It can be changed according to your quantity or package

Q8 : How about inspection?

A: We have the whole inspection system from raw material to end products include temperature rise test,salt spraying test conductor type test,mechanical life test.

Q9 : What is payment terms?

A: T.T, Paypal,Western Union,Alibaba trade assurance and L/C is acceptable. 30% T/T in advance ,70% balance before shipment.

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Why choose us:

1. One-stop supplier globally.

2. Many years professional experiences in electrical appliance industry.

3. Professional online technology support for perfecting your power energy solution free.

4. Experienced sales service,oompetive price.

5. Reliable quality and warranty assurance: 12 month or more

5. Whatever big or small order, we can provide you one-to-one service.

6. Based on mutural benefit,creat win-win business and long relationship.

This product is usually customized.

We are a manufacturer and have a professional technical department that can design and provide solutions according to customer needs.

Please contact our sales personnel to obtain design drawings

Here are our customer examples for your reference

Welcome to inquiry

Contact information:

Jiyuan Fengyuan Electrical Equipment Co., Ltd

Sales Department

Contact person:Mr Charles Du

E-mail:fengyuan800@outlook.com

Mobile:+8618639199897(Available for whatsapp,wechat,skype)

Add:Huling industrial zone,jiyuancity,henan province,China

TEL:+86-0391-2180800

FAX:+86-0391-2180818

Our series of quality standards support our unremitting pursuit of MV Indoor Withdrawable Vacuum Circuit Breaker's stable performance and warm services. Our company adheres to the sunny and decent corporate culture, adheres to the rigorous and even harsh industrial spirit, keeps learning and exchanging with domestic and international cutting-edge technologies. If you need to have any of our merchandise, or have other items to be produced, make sure you send us your inquiries, samples or in depth drawings.