What are the top ten high voltage vacuum circuit breaker brands? Shaanxi Taikai High Voltage Switch Manufacturing Co., Ltd. ZW32-12 vacuum circuit breaker. The self-developed integral cast dry high-pressure measuring box and ZW32F intelligent boundary switch are combined. It is suitable for electric energy measurement in outdoor power systems with rated frequency of 50HZ and rated voltage of 10KV and below. It can provide users with various changes of 0.2S level And double change products. The transformer is vacuum-casted with fully enclosed epoxy resin, thus eliminating aging problems. The boundary switch part adopts a vacuum switch with zero sequence and protection current transformers. It realizes zero sequence, overcurrent and quick break protection with the intelligent controller, and can automatically cut off the single-phase ground fault and automatically isolate the interphase short-circuit fault. Ensure the safety of electricity for non-faulty users.
General provisions:
Scope of application:
1. This regulation is applicable to domestic and outdoor circuit breakers operating at 3kV and above or in standby. Circuit breakers imported from abroad can also be implemented in accordance with this regulation in conjunction with the regulations of the manufacturer.
2. Personnel on duty in power plants and substations, inspectors in the substation area of ​​power supply bureaus, chief engineers, biotechnology departments and workshop technical leaders in power plants should be familiar with and abide by the corresponding provisions of this regulation.
General requirements:
1. The circuit breaker shall have the manufacturer's nameplate marked with basic parameters and other contents. Corresponding contents of circuit breakers such as capacity-increasing transformation. The circuit breaker technical parameters must meet the requirements of the operating conditions at the installation site.
2. The opening and closing indicators of the circuit breaker should be easy to observe and indicate correctly.
3. The grounding metal shell of the circuit breaker should have an obvious grounding mark, and the grounding bolt is not less than M12 and has good contact.
4. There should be measures to monitor the operating temperature at the connection of the circuit breaker wiring board or other necessary places, such as temperature display wax, etc.
5. Each circuit breaker should have an operation number and name.
6. The live part outside the circuit breaker should have obvious orange paint.
7. There are the following requirements for various types of circuit breakers.
Oil circuit breaker:
1. There are easy-to-observe oil level indicators and upper and lower oil level monitoring lines.
2. The grade and performance of the insulating oil should meet the local minimum temperature requirements.
Compressed air circuit breaker:
1. Pressure gauge with monitoring inflation pressure.
2. The body air storage tank should generally be equipped with a pressure relief valve.
3. The compressed air system should be equipped with high-pressure gas storage tanks and working gas storage tanks with suitable volumes, and the working pressure and decompression ratio should not be less than 5: 1.
4. When the gas pipe enters the gas tank of the circuit breaker body, it should pass through the check valve, filter and control valve. The air storage tank of the body should be equipped with a drain valve.
5. Porcelain sleeves that do not withstand working pressure should have a slightly positive pressure ventilation device and a heating device to ensure normal operation at low temperatures in order to keep the inner cavity dry.
Sulfur hexafluoride circuit breaker:
1. To monitor SF6 gas pressure, a density relay or pressure gauge should be installed.
2. The circuit breaker should be attached with pressure-temperature relationship curve.
3. With SF6 gas supply interface.
Vacuum circuit breakers should be equipped with protection devices that limit operating overvoltage.
When constructing, expanding or rebuilding substations and booster stations, it is forbidden to purchase products that are not allowed to be ordered by the superior competent authority and that have not been qualified by the relevant authorities.
The trial operation of new products on the grid shall be subject to approval procedures in accordance with relevant regulations, and all electric power bureaus, power supply bureaus and power plants shall not arrange without permission.
Power plants and substations shall formulate on-site operation regulations in accordance with the relevant provisions of this regulation and in conjunction with the situation of the unit.
What are the top ten high voltage vacuum circuit breaker brands? Shaanxi Taikai High Voltage Switch Manufacturing Co., Ltd.
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Steel Structures can be used in many industries such as foundation reinforce, electric power transmission structures and tubular scaffolding, etc.
A flange can also be a plate or ring to form
a rim at the end of a pipe when fastened to the pipe. A blind flange is a plate
for covering or closing the end of a pipe. A flange joint is a connection of
pipes, where the connecting pieces have flanges by which the parts are bolted
together.
Although the word flange generally refers to
the actual raised rim or lip of a fitting, many flanged plumbing fittings are
themselves known as 'flanges':
There are many
different flange standards to be found worldwide. To allow easy functionality
and interchangeability, these are designed to have standardised dimensions.
Common world standards include ASA/ASME (USA), PN/DIN (European), BS10
(British/Australian), and JIS/KS (Japanese/Korean). In the USA, ANSI stopped
publishing B16.5 in 1996, and the standard is ASME B16.5
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