Why sf6 vacuum qi Author: Pilot High measuring time: 2003-10-25 Read: When a new high-voltage electrical equipment inflatable sulfur hexafluoride, qi-site commissioning equipment, etc., the current general method of operation both ordinary oxygen valve (internal rubber seal highly absorbent material), ordinary rubber tube (absorbent strong, long-term use of the inner tube in the water content of thousands ppmv) and other tools. Under normal circumstances not be dried before use, complement, inflated simply about emissions into the air (from the environmental and life safety requirements which is not allowed), the water adsorbed on the wall and not been able to get ruled out, then go out into the fill gas equipment. Since the device itself, there are strict requirements for moisture content of sulfur hexafluoride gas, industry standards and put into operation shall not be greater than the former over the latter 300PPm 150PPm (interrupter) into operation. If at the time of qi humidity greater than 75%, or in the pipeline adsorption a lot of water, so the water is bound to be brought into these internal devices, and water is no longer with the inside removed, will affect the high-pressure sulfur hexafluoride the safe operation of electrical equipment itself and will have serious consequences. 1, sulfur hexafluoride high-voltage electrical equipment (circuit breakers, GIS, transformers, etc.) in the operation to be carried out routine tests, such as sulfur hexafluoride gas, water content test, multiple choice test or because the test equipment and large gas consumption main causes for the internal pressure, density decreases, requiring the addition of new sulfur hexafluoride gas. 2, PN series vacuum qi device uses non-hygroscopic hydrophobic materials, pipes made of stainless steel armored flexible tube through the oil-free vacuum pump can quickly extract gas water inside the tubes, vacuum pressure inside the pipe to ensure that less than 13Pa ( 0.13mpar). Product Specifications Holds Class Holds (repair, test) power facilities permit application requirements for installing the first class (repair, test) power facilities permit class is divided into one, two, three, four, and five. The second level achieved Holds Class Holds (repair, test) power facilities permit installation activities can engage in all voltage levels of power facilities. The applicant shall meet the following conditions: (a) legal personality and perfect organization; (b) the registered capital and net assets of 60 million yuan or more; (c) over the last three years to undertake the following projects listed in the first and second child Engineering listed in paragraph 3 of any one child, and engineering quality standards: 1.330 kV voltage levels above 220 kV substation two or voltage substation 5; 300 km 2.330 kV overhead line or above 220 500 km kV overhead lines; 80 km or elevation of 100 meters above the tower spans across more than engineering a 3.220 kV cable lines. (D) engage in the business of power facilities installed highest annual income of 200 million yuan project settlement over the last 3 years; (e) technical director, responsible for the safety of people with more than 10 years of experience in the management of power facilities installed, with power-related professional and advanced technology qualifications; (f) technical and economic management of more than 70 people, including a mid-level power-related professional and technical qualifications of staff of 50 people or more; (g) power-related construction division of professional registration of 15 or more; (viii) electrician work permit holders into the net more than 120 people, including more than 70 high-voltage electrician, special electrician more than 20 people and no less than five professional people; (nine) full budget, quality staff more than three people each, installation foreman more than 20 people; (j) a sound and effective system of safety production organization and conduct safety training in accordance with law, full-time security officers supervise more than five people; (xi) and can undertake the project scope to adapt construction machinery equipment; (xii) sound technical file management system.