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1、1BASIC REQUIREMENTS基本要求The specifications included in this covers the Electrical Works for 5,300 tpd cement plant near Atbara in River Nile State, of The Republic of Sudan. The electrical power supply to the project will be provided by National Electric Corporation (NEC) Sudan.The plant shall also b
2、e provided with 14 MW DG based Captive Power Plant for feeding the power to Clinkerisation section of the plant in the event of power outage.此规范主要是用于苏丹境内尼罗河附近的阿特巴拉5,300 tpd水泥厂。此项目所用的电 力是由苏丹国家电力公司提供的。(简称NEC)该水泥厂还建了一个14 MW DG的自 备电厂。一旦，国家电力公司的供电出现问题，此自备电厂便可以给熟料煅烧这一部门 供电。1.1 SITE CONDITIONS AND DESIGN D
3、ATA现场环境和设计资料The climatic conditions of the site shall be as described in Part IV of this document.Furthermore, the influence of heavy dust, generally prevalent in cement plant coupled with local dusty winds, has to be taken into consideration. Therefore, it is necessary to protect all equipment and
4、apparatus against such affects. All Electrical and Automation equipment shall be supplied for operation at the required capacity under specified site conditions. With reference to these conditions, the design data for electrical and automation equipment will be:-此文件的第四部门将介绍现场的环境情况。还要凡请贵方多多考虑的是现场灰尘很大
5、， 水泥厂总是尘土飞扬。因此需要保护所有的设备和仪器不受影响。在这样的一个既定的 现场环境下，所有的电气和自动化设备都应该运行正常，产量也应达到所需的要求。鉴 于此种情况，电气和自动化设备的设计资料如下 Outdoor genera l 外面的一般温度：55o C Electrical rooms 电气室：45 o C Control rooms 控制室：40 o CThe Electrical and Automation equipment shall be designed for service in the most unfavourable and severe condition
6、s of operation expected to be met in the project. Furthermore, the equipment and the installation shall be designed according to the particular conditions and the nature of the atmosphere of each building and / or area and / or premises. The following degree of protections shall be considered :-所设计的
7、电气和自动化设备应该能在一个不好的，恶劣的环境底下运行从而才能满足此 项目的要求。而且，还应该根据特定的环境要求，来考虑每一个建筑里设备的设计及安 装要求。 MV Switchboard 中压配电盘： IP 44 LV Switchboard 低压配电盘：IP41 Push button station for fire prone areasS 火地区的按钮箱：IP65 Push button station for field mounted areas 现场按钮箱：IP55 All Motors所有的电机：IP55 Converters 变频器：IP41 Lighting fixture
8、s / Fieldinstruments照明装置/现场仪表：IP651.2 CODES AND STANDARDS 标准Except where indicated otherwise in these specifications, the design and installation of the Electrical and Automation systems shall comply with the following international codes and standards (latest issue), arranged in order of priority:-
9、在这个规范中除了应该遵循它具体列出来的那些标准之外，电气和自动化系统的设计和 安装还应该符合下列按优先顺序所列出的国际规范和标准。IEC : International Electro-technical Commission国际电子技术委员会EN : The European Norms, otherwise the applicable DIN standards欧洲标准，及其他可以应用的DIN标准VDE : German Association of Electrical Engineers德国电气工程师联盟NEMA : National Electrical Manufacturers
10、 Association国家电气设备制造商联盟The standards shall be applied in order of priorities stated above.应按优先顺序来实施上述标准。All the sub-suppliers of electrical and automation equipment shall have ISO - 9001: 2000 Quality system standards for his company and manufacturing plants.所有电气和自动化设备的分包商都应该有ISO - 9001。2000质量系统标准用于
11、该公司 和加工厂。1.3 BASIS OF DESIGN 设计基础a) Continuity of power supply facilities for inspection, testing, maintenance, cleaning and general repairs will be of prime importance in the design.设计中最重要的一点就是：要保证供电的持续性从而便于进行检查，测试，养护， 清理和基本的检修等一系列工作。b) Standardisation of equipment and its components to reduce the
12、necessary stock of spare parts.设备及其构件应该标准化，从而，可以必要备件的准备工作就可以简化了。c) All electrical equipment shall be designed for operation at the required capacity in ambient air temperatures in a dusty plant environment.所设计的所有电气设备都应该满足这个灰尘飞扬的水泥厂里环境温度的要求。在运 行中，这些设备必须达到额定的要求。d) The design shall include the necessar
13、y provisions for the safety of man, machine and environment.设计还应考虑必要的人生安全，设备及环境安全的预防措施。e) The voltage, frequency and symmetrical short circuit levels for supply and distribution shall be as follows:-在供电和配电中，应该考虑以下的电压，频率和系统短路级别的要求如下：i) Incoming power from :3 Ph, 11 kV 10%, 50 Hz 3%Power plant电厂来的进线ii
14、) Incoming Power Supply进线的供电要求：3 Ph, 33kV, 10%, 50Hz 3%iii) Medium voltage 中压 ：3 Ph, 11 kV 10%, 50 Hz 3%iv) Low voltage (TN-C)低压：3 Ph, 415 V 10%, 50 Hz, 3%, 50 kA min.v) Lighting, plugs sockets :220V, 1 Ph + E + N , 50 Hzand auxiliary equipment withneutral (N) & earth (E)带零线和地线的照明，插座及辅助设备vi) Welding
15、 Outlets 焊接的外口 ：415 V, 3ph + E + N, 50 HzConsumer voltages 消耗电压1) MV motor 中压电机： 300 kW, 11 kV 10%, 3 Ph, 50 Hz 2%2) LV motor 低压电机： 300KW, 415 V 10%, 3Ph+E+N,50Hz 2%3) Emergency power 应急电源 ：415 V, 3 Ph +E + N, 50HzAuxiliary control voltage 辅助控制电压i) HV & MV switchgears高压和中压开关柜：110 V DCii) MCC：220V AC 1 Ph. + E + N, 50Hziii) AC Control (Actuators, Solenoids etc.) ：220V AC, 1PH. + E + N,50Hz交流控制(执行器，螺线管)iv) Automation control 自动控制：48/ 24 V DCv) Uninterruptible voltage不间断性电压：220/ 415 V, 3 Ph, 50 HzAllowed voltage drop:容许的电压降i) The voltage drop of the main feeder lines from central MV swi
