電氣設(shè)計外文翻譯--當今建筑電氣設(shè)計的幾個問題-建筑結(jié)構(gòu)-在線瀏覽
2025-07-30 20:08本頁面
【正文】 ding the availability, reliability, maintainability, etc.) and can be implemented of missing or deviate from. The following ment on a few of the most mon aspects were discussed. Design in breach of or deviation from the provisions of design specifications, safety, credibility with respect to nonimplementation of the design specifications are quite mon For example, before a City Hall Square Garden (including the square green garden lighting, lawn lighting and sound and light Fountain Square 7 Center) project discretionary electrical construction drawings submitted to the following problems: the absence of electrical protective earthing and equipotential bonding design。 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。 submersible pumps and underwa ter lighting should be used diving cable distribution。 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。 to gas discharge lamp as the main load circuit, Nline crosssection should not be less than the phase crosssection ... ... 39。lifting and transport equipment, convenience39。 Another example of a hi ghrise office co mplex Variable distribution of the ground floor room with hair, set on the first floor conference room of a bottom basement neither to consider the necessary Transportation maintenance access, nor does it provide adequate width of the device can be brought into the doorframe. When the Commissioner of the trial plan to discover and raise this issue, the design units in the answer turned out to be: The original design intent from a layer of the Chamber Office will change distribution and power generation equipment in place before pouring lifting the floor of 9 the hall. That intention was obviously wrong, even without considering civil construction may have on the place of the damage caused by electrical equipment, building operational after the repair and replacement of electrical equipment and transportation is only forced open the floor conference room floor to solve it! Notice of reinforced concrete frame structure building a reasonable service life of up to 50 years, while the transformation and distribution equipment life of only 20 years or less, regular or failure of the maintenance cycle is even more short. Therefore, electrical design must be properly considered its transportation and maintenance of lifting the problem of access. Design of shallow depth of the current construction design than the Ministry of Construction 39。 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 cal
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