10kv 50ka VS1 Vacuum Circuit Breaker

10kv 50ka VS1 vacuum circuit breaker

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

It is an indoor switchgear with three-phase AC 50Hz rated voltage of 12KV power system. It is used as protection and control unit for power equipment and industrial and mining enterprises. Applicable to places that require frequent operation at rated operating current, or multiple times to break short-circuit current.

The circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, and can be used as a fixed installation unit, or can be equipped with a special propulsion mechanism to form a hand truck unit.

Features: small size, light weight, suitable for frequent operation

Main structure: vacuum interrupter, electromagnetic or spring operating mechanism, bracket and other components.

Environmental requirements

A.The altitude shall not exceed 1000m;

B. the environment temperature, maximum temperature + 40 ℃, the maximum temperature of 15 ℃ (only allow - 30 ℃ storage);

C. Environmental humidity: daily average relative humidity is 95%, and monthly average relative humidity is less than 90%, Daily average saturated vapor pressure acuities were 2.2 * 10 ^ 3 mpa

Daily average saturated vapor pressure acuities were 1.8 * 10 ^ 3 mpa

D. No fire, no dangerous dressing, no serious contamination, no chemical Fuji and no violent shaking.

If there are special conditions of use, please inform the manufacturer when ordering.

The operating mechanism adopts spring energy storage type, advanced and reasonable cushioning device, no rebound of opening, reducing impact and vibration of opening.

 

PRODUCT PHOTO

The main technical parameters:

NO	Item	Units	Technical parameters
1	Rated voltage	KV	12
2	Rated short-duration power frequency withstand voltage		42/48(Interphase, ground/fracture)
3	Rated lightning impulse withstand voltage		42/48(Interphase, ground/fracture)
4	Rated frequency	Hz	50
5	Rated current	A	630 1250	630 1250 1600 2000 2500 3150	630 1250 1600 2000 2500 3150
6	Rated short-circuit breaking current	KA	20/25	31.5	40
7	Rated short-time withstand voltage		20/25	31.5	40
8	Rated short circuit duration	S	4
9	Rated peak withstand current	KA	50/63	80	100
10	Rated short circuit closing current		50/63	80	100
11	Secondary circuit power frequency withstand voltage (1min)		2000
12	Rated single / back to back capacitor group breaking current	A	630/400(40kA:800/400)
13	Rated capacitor bank closing current		12.5 (frequency is not greater than)
14	Mechanical life	KA	20000
15	Rated current breaking times (electrical life)		20000
16	Rated short circuit current breaking times	times	50(40KA≤30)
17	Dynamic and static contacts allow wear cumulative thickness	mm	3
18	Energy storage time	s	≤10
19	Contact opening distance	mm	11±1
20	Overtravel		3.5±0.5
21	Contact closing bounce time	ms	≤2(40KA≤3)
22	Three-phase split/closed period		≤2
23	Average opening speed (contacts are separated by -8mm)	m/s	1.2±0.2
24	Main conductive loop resistance		0.6±0.2
25	Main conductive loop resistance	μΩ	≤50(630A)≤45(1250A) ≤40 (1600,2000A)≤35 (2500A or more)
26	Rated operation sequence		0-0.3s-Co-180s-Co

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

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