【正文】 in the bus and the transformer circuit breaker according to the choice of the general framework of values to select . For example: Route certain equipment capacity 530Kv, Kx take to calculate current of 704A, select the frame circuit breaker is 1000A, tuning is 800A。④規(guī)律明顯便于查找，能使看圖者一目了然。 6 層配電箱的設(shè)置 根據(jù)各層防火分區(qū)的劃分，分別在各層編號(hào)為 A～ K 豎井內(nèi)設(shè)置層照明配電箱為各商鋪供電 ,各商鋪的供電采用一對(duì)一放射式供電。 負(fù)荷參數(shù)的選擇：針對(duì)以上遇到的問題，進(jìn)行負(fù)荷計(jì)算時(shí)， 首先與開發(fā)商銷售部門進(jìn)行良好的溝通，確定各層的業(yè)態(tài)形式商鋪面積和性質(zhì)，這是電氣負(fù)荷計(jì)算的基礎(chǔ)依據(jù)；其次確定商鋪內(nèi)單位面積參數(shù)指標(biāo)也很重要且復(fù)雜，因?yàn)橐?guī)范中沒有明確的指標(biāo)可以參考；而且不同城市間的經(jīng)濟(jì)發(fā)展水平不均衡，用電指標(biāo)也不同；便在同一城市不同區(qū)域的消費(fèi)群體也有差異。 3）需要系數(shù)的選擇：參數(shù)確定后，需要進(jìn)行負(fù)荷計(jì)算。需要指出的是由于各層的業(yè)態(tài)比較復(fù)雜各層的防火分區(qū)上、下層不對(duì)應(yīng)，使得有的豎井在負(fù)責(zé)本防火分區(qū)供電的同時(shí)，還要負(fù)責(zé)相鄰的防火分區(qū)的供電。根據(jù)以上要求及地上、地下建筑防火分區(qū)和業(yè)態(tài)形式的不同情況，采用了兩種略有差別的方式。 current transformer for the 1000/50。 2 substation transformers and 10Kv, 10Kv chillers sharing a power line, with a total capacity of . The design of the substation layout, in addition to meeting regulatory requirements, it also need to consider the highpressure cabis, transformers and low voltage power supply cabi by order of arrangement, especially in low voltage distribution cabi to feed the cable smooth and easy inspection duty problems are not seriously consider the construction of the cable crossing will cause more long detour, a waste of floor space, and convenient inspections and other issues. 4 small fire load power supply In the design of large mercial projects often encounter small fire load of electrical equipment and more dispersed distribution, if fed by a substation, a substation will be fed a lot of lowvoltage lowcurrent counter circuit breaking capacity circuit breaker and conductor of the dynamic and thermal stability in a certain extent. According to GB500451995 fire protection design of tall buildings, rule should be used in Fire Equipment dedicated power supply circuit, the power distribution equipment shall be provided with clear signs. Interpretation of the provisions of the power supply circuit means from the lowvoltage main distribution room (including the distribution of electrical room) to last a distribution box, and the general distribution lines should be strictly separated. In this design, the use of methods to increase the level of distribution, that is different from the substation bus segments, respectively, a fire fed a special circuit, set in place two distribution cabis, distribution cabis and then the resulting radial allocated to the end of the dual power to vote each box, so that not only meets the specification requirements for dedicated power supply circuit, but also to avoid feeding the substation level of many small current loop. 5, the choice of circuit breaker and conductor Commercial real estate projects use the room as the uncertainty in the choice of circuit breakers and conductors must be considered in a certain margin to meet the needs caused by adjustment of the load changes. According to this characteristic, increased use in the design of the plug buspowered, not only meet the requirements of large carrying capacity, and also allows the flexibility to increase supply and distribution, are reserved in each shaft in the plugbox backup in order to change, according to changes in upper and lower load, to adjust. For example: a bus