住宅楼的建筑强电电气设计毕业论文外文翻译

住宅楼的建筑强电电气设计毕业论文外文翻译内容摘要：

tion principle （ 1） in the schematic design stage can use unit index method。 In the preliminary design and construction drawing design stage, appropriate USES need coefficient method. In this design, the design of each stage are can use unit index method. （ 2） electric equipment sets more, the equipment capacity difference between, appropriate USES need coefficient method, are used for main distribution of load calculation. （ 3） electric equipment sets less, the equipment capacity of difference between the binomial method used in a trunk and distribution board (box) load calculation. This design choose classification posite indicator load calculation. Need to factor: Kd = load curve maximum active load/rated load Need coefficient is a prehensive coefficient, it marks the electric equipment group of putting into operation, from the power supply work practical to use power and electric equipment group equipment power ratio. Civil building is mon need coefficient method. The need to coefficient method, we should first make sure that electric equipment group of plant capacity. Electric equipment nameplate, indicated capacity for rated capacity. The same type of electric equipment into a group, namely electric equipment group. Electric equipment group of total capacity is not necessarily the equipment rated capacity of the direct additive, but must first put their conversion for unified duty under the rated capacity, adding only. After conversion system unified regulation system and the capacity of the set is called equipment capacity, namely for Pc. Need coefficient method of putation formula is as follows: Electric equipment group of active and reactive power and apparent putation load:  PkP tc (21)  QkQ tc (22) 22 ccc QPS  (23) 3380cj SI  (24) Need coefficient value is in a certain range according to the statistical method to determine, its accuracy of load calculation has important significance. However, due to many factors, need coefficient table can only be given by the remended value, which requires the designer according to design experience and circumstances to choose a more appropriate value. residential distribution design requirements Residential distribution design must meet the residents39。 safety, convenience and beautiful basic conditions, namely should do the power supply reliability and to ensure that the power supply quality. As far as possible do limit simple and have a certain flexibility。 Ensure safe operation, convenient maintenance. To ensure that the power supply quality and to ensure that the power supply voltage quality and to ensure that the power supply frequency quality. Residential distribution design, first of all to consider residential load levels, household electricity consumption and electricity metering method, then, to determine the distribution system mode, the reasonable choice of line protection appliances. distribution line protection Residential distribution line protection is to prevent personal by electric shock. Avoid personal by electric shock generally has two kinds: one kind is called prevent direct contact with the electric protection, referred to as to prevent direct contact with the protection or prevent borrow shock protection. This refers to the electric Gas lines and equipment under normal working conditions, personal contact machine electric shock caused by the person. Another kind is the room and contact electric protection, referred to as anti indirect contact protection or prevent indirect contact protection. This refers to the electric circuit and equipment can be exposed conductive part, under normal circumstances it is not conductive in fault cases, due to the insulation damage cause electrical equipment can be exposed conductive parts, such as shell charged. When personal touch charged shell, can cause casualties. Used to prevent touch fault cases charged electric circuit and equipment shell, casing or other exposed conductive part can be caused by electrical accident personal protection, called anti indirect shock protection. Residence in the main distribution line protection: short circuit protection, overload protection and grounding protection. Residence in the distribution line protection content, mainly through the inside the building or indoor wiring ark or distribution box of circuit breaker to achieve. When the choice should be paid attention to: 1, to determine the selection of the circuit breaker rated voltage and rated frequency, 2, the rated current should be equal to or greater than the control loop of the maximum working current, but also her under certain conditions of current。 3, should meet cutoff condition of dynamic stability and thermal stability, select the circuit breaker off short circuit current yes onoff ability。 4, should also consider the use of circuit breaker place of external conditions, main consideration electrical equipment installation height and damp environment, if the electrical installation in the special environment, should choose and adapt to the environment of the special electrical. In addition, due to a residential household, household used in lighting and household appliances is residential line final protection object, so, in the determination of the distribution system and the choice of circuit breaker, should as far as possible in a indoor shortcircuit protection, only cut off the fault circuit or indoor function power supply circuit, and do not affect other household normal power supply. Distribution circuit between the superior and the subordinate action time limit should be selective, each part with as much as possible to realize. 3 electric lighting system design electric lighting overview An overview of lighting In the modern residential design, lighting has practical significance, also have。