The solid form of insulation to achieve to win the title, while addressing the outdoor condensation problems. (3) Drive unit: includes an electromagnet and a manual lever that is conjugated thereto. (4) Energy storage reversing mechanism: The spring energy storage (release energy) is realized by the rocker swinging mechanism. (5) Transmission mechanism: The horizontal displacement is converted into a vertical displacement by a six-link parallel vertical displacement member. (6) Base box and other parts: including the box body, moisture-proof parts and counting device.
(7) auxiliary circuit: includes an auxiliary switch, connector terminals and the like connected to the outside.
Performance characteristics of outdoor vacuum circuit breaker Compared with other on-column vacuum circuit breakers, the circuit breaker has the following characteristics: the phase insulation is solid insulation, and the solid insulation is vacuum casting and outer insulation porcelain casting with special solid insulation material. In one. Due to the lack of oil, the overall weight of the switch is much reduced, the volume is reduced, and there is no risk of fire and explosion.
The electromagnetic operating mechanism is adopted, and the manufacturing is simple, and the spring operating mechanism that is working is prone to a stroke that is not in place and the operation is unreliable.
The mechanical parts are made of aluminum alloy castings to ensure their light weight and the necessary mechanical strength. The purchased parts such as vacuum foam and insulating porcelain sleeves are made of regular manufacturers that meet the national standards and industry standards to ensure the quality of the products.
The action process of the circuit breaker is: after the driving component receives the control command, the driving energy storage (release energy) reversing mechanism causes the spring to release the energy, and then drives the actuator through the transmission mechanism to complete the corresponding opening and closing operation of the vacuum switch tube.
In addition to the electric opening and closing function, the circuit breaker can also be manually opened and closed using the joystick, which fully meets the requirements for field use.
Fourth, the main technical parameters 1. Rated voltage: 2. Rated frequency: 3. Rated current: 4.lmin power frequency withstand voltage: 5. Lightning impulse withstand voltage (peak): 6. Rated dynamic steady current (peak): 7.4 S thermal stable current: 8. rated short-circuit breaking current: 9. rated short-circuit closing current (peak): 10. rated short-circuit current breaking times: 30 times 11. rated current breaking times: 12. mechanical life: 13. Operating voltage of the opening and closing coil: 14. Operating voltage of the opening and closing coil: 15. Closing time: other pressure level, temperature rise, closing speed, different period and other indicators meet the national standards and departmental requirements, The sub-test passed the test and has passed the type test.
Not suitable for use in places with fire, explosion, chemical corrosion hazard and frequent severe vibrations.
At present, the new 10kV outdoor high-voltage vacuum circuit breaker has installed nearly 600 sets of power remote control systems or high-voltage line fault automatic breaking devices for all-electric power transmission lines and signal self-closing lines. The field application shows that the circuit breaker is safe in operation, reliable in operation and extremely low in failure rate, effectively ensuring the reliability and safe transportation of the railway power system, and has produced enormous social benefits.
(Continued from page 47) The impact on site construction shall prevail.
Watering and curing to reduce surface temperature.
Adopt circulating water: According to the actual work experience, ¢50 is used as the returning main pipe to lay the 钢管32 steel pipe branch in the horizontal direction, and the longitudinal spacing. 5m, and add a valve to adjust the amount of water, the internal use of water plus ice pressure cycle. After the concrete is condensed, the steel pipe is filled with high-grade cement slurry under mechanical pressure. Before the grouting, the fan is used to pressurize the water and the slag in the tube to prevent air bubbles from being generated inside the lumen, which affects the compactness.
Temperature measurement hole: In order to accurately understand the temperature difference between the inside and outside and the temperature difference between the walls, four temperature measurement points are set in the wall to understand the atmospheric temperature, the skin temperature, the temperature of the helium center, the surface temperature of the circulating pipe and the cooling effect of the circulating water pipe. Set a special person to be responsible for temperature measurement for 24 hours, timely understand the temperature difference between inside and outside, and take measures to reduce circulating water temperature to reduce the temperature difference between inside and outside.
The exterior is covered with grasshoppers, so that on the one hand, the sun is directly exposed to the surface of the crucible, which is convenient for curing and lowering the surface temperature.
Since this project is a medical medical special project, there are a large number of wires and telecommunication pipelines inside, and the pipeline is pre-buried in the concrete. Therefore, when the steel bars are tied before the supporting die, various pipelines should be pre-buried, and the pipeline should be oriented. Correct, firm and firm, avoid deformation by vibration, and the pipe mouth should be blocked and tight to avoid clogging the pipeline. After the various pipelines are buried, the molds can be concealed.
The above is some of my meetings in the construction of the building. The large-scale ç ¼ is still in an emerging stage as a subject. As a medical radiation building, the characteristics are only successful, no failure, otherwise it will cause irreparable damage. It has a lot of content, and we need to continue to explore to promote the progress of the construction industry.
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