Manufacturer of ZW7 Column Boundary Vacuum Circuit Breaker in Mianyang City

Detailed Introduction

The series of outdoor high-voltage permanent magnet vacuum circuit breakers is a new generation of column mounted vacuum circuit breakers developed by our company, which integrates advanced technologies from both domestic and foreign sources, draws on the strengths of various companies, adopts a new design concept, utilizes high-tech methods, and is the most advanced. This product can be used as a switch for the 10kV side and 10kV outgoing line of a 35kV substation, as well as a pole mounted switch for the distribution network. When combined with the controller produced by our company, it can easily achieve control, protection, measurement, and communication. It is a device for realizing distribution network automation and miniaturization of substations.

Product Features

Ideal equipment for urban and rural power grid renovation:

The vacuum circuit breaker, when paired with an intelligent controller, can form an automatic recloser, realizing the function of a recloser, as well as remote control, telemetry, remote signaling, and remote adjustment;

Flexible and convenient operation:

This product is equipped with electric energy storage, electric opening and closing, as well as manual energy storage, manual opening and closing, and can be operated remotely at close or long distances;

Superior breaking performance:

Break the short-circuit current of 20KA (25KA) for 30 times;

Low operating power and high reliability:

The newly designed small electric spring mechanism reduces the operating power of the number of components (about 30W) to the lowest level possible;

Featuring maintenance free features:

The main circuit, anime components and operating mechanism of the circuit breaker are sealed in SF6 gas (zero gauge pressure), which is not affected by the external environment;

Reliable sealing performance:

Adopting mature sealing structure technology, the sealing performance is reliable;

Unique entry and exit methods:

Using silicone rubber sleeves to ensure sufficient insulation distance between terminal blocks and excellent external insulation characteristics;

Safe use:

There is an explosion-proof device installed at the top of the box, which ensures that even in the event of an unexpected internal malfunction, there will be no leakage of high-temperature gas or splashes.

Manufacturer of ZW7 Column Boundary Vacuum Circuit Breaker in Mianyang City

Structure Introduction

ZW7-40.5 outdoor high-voltage vacuum circuit breaker is equipped with CT19BW operating mechanism, which realizes the opening and closing functions of the circuit breaker through the transmission device. LZZBJ-35 current transformer (fully enclosed) is selected for metering and relay protection. The number of coils, transformation ratio, and accuracy can be customized according to user requirements; FJ-01 (6901) high-voltage circuit breaker insulation grease is selected to strengthen the external insulation of the vacuum arc extinguishing chamber and current transformer, thereby expanding the range of use of the circuit breaker.

Working principle

ZW7-40.5 outdoor high-voltage vacuum circuit breaker structure is a porcelain pillar type. The upper porcelain bottle is an arc extinguishing chamber porcelain bottle, which is equipped with a vacuum arc extinguishing chamber, and the lower porcelain bottle is a pillar porcelain column. The three-phase porcelain bottles are installed on one structural box. The moving end of the arc extinguishing chamber is connected to the output shaft of the spring mechanism through a crank arm and an isolation rod. The connecting rod between the spring mechanism and the circuit breaker is housed in a waterproof mechanism box. This product mainly consists of a vacuum arc extinguishing chamber, a current transformer, a transmission mechanism, and a spring operated mechanism.

Introduction to Vacuum Tube

The ZW7-40.5 outdoor high-voltage vacuum circuit breaker is equipped with a vacuum arc extinguishing chamber, which has a very high vacuum degree. Due to the CuCr50 material used as the contact of the arc extinguishing chamber and the cup-shaped longitudinal magnetic field structure, it has the advantages of large breaking capacity, high insulation level, strong arc extinguishing ability, long service life, small size, simple maintenance, no explosion hazard, no pollution, and low noise. The vacuum arc extinguishing chamber is installed inside the upper porcelain bottle, which not only avoids many drawbacks caused by oil flushing and SF6 gas filling, but also makes maintenance and repair more convenient. The insulation material silicone ester is filled between the arc extinguishing chamber and the porcelain bottle to solve the problem of anti condensation. This insulation material has good insulation performance, aging resistance, outdoor resistance, and high temperature resistance.

Arc extinguishing principle

When the moving and stationary contacts are energized and disconnected under the action of the operating mechanism, a vacuum arc will be generated between the contacts. At the same time, due to the special structure of the contacts, an appropriate longitudinal magnetic field is generated in the gap between the contacts, which keeps the vacuum arc diffusion type and maintains a low arc voltage. When the current naturally crosses zero, residual ions, electrons, and metal vapor can recombine or condense on the contact surface and shielding cover in microseconds. The dielectric insulation strength of the arc extinguishing chamber fracture is quickly restored, and the arc is extinguished, achieving the purpose of breaking.

Environmental conditions for use

1. Altitude: ≤ 2500m;

2. Surrounding air temperature: highest+40 ℃, lowest -35 ℃;

3. The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34m/s);

4. The seismic intensity shall not exceed 8 degrees;

5. Air pollution level: Level III;

6. Maximum daily temperature difference: not exceeding 25 ℃

Ordering Notice:

Please indicate on the contract when placing an order:

1. Product model and name.

2. Type of organization (manual or electric)

3. If there is an electric motor, please indicate the rated voltage of the closing and opening coils and the energy storage motor separately (AC220V DC220V DC110V)

If an overcurrent protection device for the transformer is required, please indicate the current ratio of the transformer.