12kv Indoor Vacuum Circuit Breaker
Widely used in power plants, substations, and other electrical equipment,as the protection and control of electrical facilities,especially for the place where the goods are frequently operated under rated current and the multiple breaking current.
Description
12kv Indoor Vacuum Circuit Breaker
The side mounted indoor vacuum circuit breaker is suitable for 12kV voltage, as a protection and control unit of power equipment, industrial and mining enterprises. 12kv indoor vacuum circuit breaker can be used for switching loads of various kinds and frequent operation, repeatedly breaking short-circuit current situation. The product adopts new type of circuit breaker, a VSG part can adopt the international brand of embedded pole, the vacuum interrupter and the main circuit part is fixedly sealed into a whole, protect the interrupter from collision, dust and gel image, strong ability to adapt to the environment, greatly reduces the cost of operation and maintenance.
Structure and working principle of circuit breakers
There are many manufacturers and models of vacuum circuit breakers. According to usage conditions, it is divided into two types: indoor (ZNx - * *) and outdoor (ZWx - * *). It mainly consists of a frame part, an arc extinguishing chamber part (vacuum bubble), and an operating mechanism part.
The circuit breaker body is composed of a conductive circuit, an insulation system, seals, and a shell. The overall structure is a three-phase common box type. The conductive loop is formed by connecting the incoming and outgoing line conductive poles, the incoming and outgoing line insulation supports, conductive clips, and soft connections to the vacuum arc extinguishing chamber.
The mechanism is electric energy storage, electric opening and closing, and also has manual function. The entire structure is composed of closing springs, energy storage systems, overcurrent releases, opening and closing coils, manual opening and closing systems, auxiliary switches, energy storage indicators, and other components.
working principle
When a vacuum circuit breaker utilizes high fidelity air current to flow through zero, the plasma rapidly diffuses and extinguishes the arc, completing the purpose of cutting off the current.
Action principle
Energy storage process: When the energy storage motor 14 is connected to the power supply, the motor drives the eccentric wheel to rotate, and the roller 10 next to the eccentric wheel drives the crank arm 9 and connecting plate 7 to swing, pushing the energy storage pawl 6 to swing, causing the ratchet 11 to rotate. When the pin on the ratchet 11 is against the plate of the energy storage shaft sleeve 32, the two move together, causing the closing spring 21 hanging on the energy storage shaft sleeve 32 to elongate. The energy storage shaft sleeve 32 is fixed by a positioning pin 13 to maintain the energy storage state. At the same time, the crank arm on the energy storage shaft sleeve 32 pushes the travel switch 5 to cut off the power supply of the energy storage motor 14, and the energy storage pawl is lifted to reliably detach from the ratchet wheel.
Closing operation process: When the mechanism receives the closing signal (the switch is in the disconnected and stored energy state), the iron core of the closing electromagnet 15 is sucked downwards, and the positioning component 13 is pulled to rotate counterclockwise to release the energy storage maintenance. The closing spring 21 drives the energy storage shaft sleeve 32 to rotate counterclockwise, and its cam presses the transmission shaft sleeve 30 to drive the connecting plate 29 and rocker arm 27 to move, causing the rocker arm 27 to buckle onto the half shaft 25, causing the mechanism to be in a closed state. At this point, the interlocking device 28 locks the positioning component, preventing the positioning bull from rotating counterclockwise, achieving the purpose of mechanism linkage and ensuring that the mechanism cannot be closed in the closed position.
Opening operation process: After the circuit breaker is closed, the opening electromagnet receives a signal, the iron core pulls in, and the top rod in the opening release 19 moves upwards, causing the release shaft 16 to rotate, driving the top rod 18 to move upwards, pushing the bending plate 26 and driving the half shaft 25 to rotate counterclockwise.
Half axis 25 and rocker arm 27 are released, and under the action of the opening spring, the circuit breaker completes the opening operation
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.
Details of 12kv indoor vacuum circuit breaker:
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 | 630 1250 1600 |
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) |
| |||
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) | ||
26 | Rated operation sequence | 0-0.3s-Co-180s-Co | |||
PRODUCT PHOTO
FACTORY WORKSHOP
COMPANY OVERVIEW
EXHIBITION
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.
Q10 : What is the service offered by company?
A: We have the professional engineer team which can design and develop the mold to arrive different customer requirement.
We also have the sales team to offer good service from pre-sale to after-sale.
ATTENTION:
1.The payment term: We accept TT,30% deposit and 70% balance against copy of BL
2.The delivery time: Usually it will take about 15-20 days.
3.The standard of package: Usually use strong plywood case for protection.
4.The logo: If you have good quantity, it absolute no problem to do OEM
5.0ur market: our products are popular in Indonesia, Philippines, Russia, USA, Middle East and so on. Some of them are our reqular customers and some of them are developinq. We hope you can join us and make mutual benefit from our cooperation.
6.Warranty: in 12 month since BL date
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
IF NEED MORE DETAILES,PLEASE FEEL FREE YO CONTACT US
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