電氣設(shè)計(jì)外文翻譯--當(dāng)今建筑電氣設(shè)計(jì)的幾個(gè)問題-建筑結(jié)構(gòu)-wenkub.com
2025-05-06 20:08 本頁(yè)面
【正文】 had to modify the design before making construction and installation。, in fact plotting the country focused on either the size cable trench, its cable bracket and cover practices have provided a number of options for the design selection, design is not selected then the construction side difficult choices, often according to the lowest construction program. Often does not meet the actual needs, and even may lead to settlement of disputes. Another example is provided by electric lighting map and places in the main room illumination standard values should be marked, of course, also require designers to carry out the calculation in accordance with calculation of illumination of lighting configurations. However, the current civil electric lighting design can be marked for illumination illumination standard values and calculations are extremely rare, the vast majority of bay and functions of the rule of thumb according to the Housing cloth lamp. Most of the illumination of a departure from the standard stipulated by the state, affecting the use of functions. For example through the supervision of the trial map electrical construction drawings in a school, after accounting 11 for the design of illumination to achieve the value of l aboratory and the classroom is only 50 ~ 701x, less than the national standard (150LX) of the half。A063M39。 requirements are quite mon, mainly in terms of design documents can be implemented deficiencies will lead directly to construction and installation problems or errors May also lead to lack of availability. Required depth because they do not carry out the necessary calculation and l abeling, but also often result in the design principles of the document itself appears rather difficult to discover the error will affect the project pletion of use. For example, according to the depth of that pow er and lighting system diagram and the corresponding equipment and materials should be detailed in the table indicate choice of electrical equipment and materials model, name, size and quantity parameters. Since the reform and opening, China39。lifting and transport equipment, convenience39。 as Computer equipment and various home appliances the Development and popularization of lowvoltage power grid highorder harmonic pollution, increasing , 3 times and the odd multiples of harmonics constitute a neutral current. Midline over current and thus lead to the phenomenon of electrical fires are also increasing. To this end, the provisions of the relevant design specification has been 39。 fountain failure to use proper protection grade requirements of electrical equipment and cables. This design is pletely contrary to the norms prescribed safety requirements, according to the drawings will remain a serious security risk. Prior to August 1999, Qingdao City, a fountain, several people took place, leisure death was shock casualties, it is because of design errors, underwater lighting, and submersible pumps due to power leakage which can not be timely. Supervision in the preconstruction trial maps, and found the above problem, by the owners to design units in strict accordance with design specifications seek to amend the design. The correct approach is: outdoor courtyards and fountains should be used locally TT power distribution system, or TNS system, and set the earth leakage protection (operating current should be no more than 30mA), which does not allow use of TNC system。 6 The current building several problems in electrical design 1 Introduction Is a leading infraStructure Engineering design, design documents are the main basis for the construction, design quality is to determine the quality of the project the first part. My project quality accident statistics show that from the design of the project quality accident cause s accou
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