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高层住宅电气设计有哪些比较要注意的？

高层住宅电气设计有哪些比较要注意的？

浏览：37次 | 提问时间： 07-06 08:12

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丢弃过去 07-06 08:12

您好，为了保证供电可靠性，现代高层建筑至少应有两个独立电源，具体数量应视负荷大小及当地电网条件而定。两路独立电源运行方式，原则上是两路同时供电，互为备用。另外，还须装设应急备用柴油发电机组，要求在15秒钟内自动恢复供电，保证事故照明、电脑设备、消防设备、电梯等设备的事故用电，高压配电系统：现代高层建筑均是采用两路独立的10kv电源同时供电。一般高压采用单母线分段，自动切换，互为备用。母线分段数目，与电源进线回路数相适应。只有当供电电源为一主一备时，才考虑采用单母线不分段的结线。电源进线几乎全部采用电缆进线，低压配电系统各级开关均采用自动空气开关(断路器)，设置瞬时、短延时、长延时三级过流保护装置。各级自动空气开关的保护整定，应注意选择性配合，防止越级跳闸。

万人中央我孤独得漂亮 07-06 08:21

电气设计应注意的问题:
1.供配电系统
1.1 地下变电站设计时应注意几个问题：
在地下变电站设计时除现有规范之外还应注意下列几个问题：
1.1.1 平面布置要紧凑
在符合规范的前提下，尽量做到平面布置要紧凑，要充分利用空间适当降低层高，减少地下的开挖深度。有条件者应采用上进线上出线方式。
1.1.2 出入口
出入口不能少于二个，其中一个是主要出入口(人员及设备出入口)，另一个是安全出入口，另外必须考虑设备出入口，设备出入口可以采用吊装孔，但是吊装孔必须有可靠的防水措施。门宽为设备宽加200毫米，门高为设备高加300毫米，门均为防火门，内部门的开启方向应符合要求。
1.1.3 电缆进出口
电缆进出口已设有专用电缆井道，必须有防水防洪措施。
1.1.4 通风系统
地下变电站必须设置可靠的送、排风系统，宜采用下侧送上侧回(送风口距地300 毫米)。风管不能进入变电站，宜设事故排风扇。变电站的换气次数为15次/h，具体应根据发热量计算，如果采用地道风，在风道入口处应设防火阀门。
1.1.5 防水措施
地下变电站应妥善选择防水措施(如常用的有隔水法、降排水法和综合法)，沿地下室的外墙内侧应设排水明沟和集水坑。
1.1.6 防洪措施
地下变电站的所有出入口均要高出站外地面，为安全起见，一般要求高出百年一遇的洪水位0.3米。附设地下变电站的室内地坪应抬高0.15米，严防水喷淋动作时的积水。
1.1.7 防潮措施
地下变电站各房间(高低压配电间、变压器间)应设置去湿机电源插座，箱板平齐。插座容量视去湿机容量而定。
1.1.8 防火措施
地下变电站应设置安全可靠的防火措施，具体可参见有关防火规范。

1.2 积极推广应用D · Yn11结线配电变压器
1.2.1 D · Yn11结线配电变压器具有低损耗、抑制高次谐波电流、容量能充分利用、零序电抗小，对切除低压侧单相接地故障有利等优点。
1.2.2 D · Yn11结线配电变压器过电流保护应采用三相三继电器星形接线，可以提高变压器过电流保护的灵敏度，是Y · Yn0变压器的1.155倍。若采用交流操作电源时，应采用去分流式继电保护接线方式。
1.2.3 D · Yn11结线配电变压器根据规程要求，一般设置电流速断保护、过电流保护、低压侧单相接地短路保护、其整定值计算与Y · Yn0配电变压器相同。

千寻追觅少年梦 07-06 08:29

高层建筑的消防控制室、消防水泵、消防电梯、防烟排烟设施、火灾自动报警、漏电火灾报警系统、自动灭火系统、应急照明、疏散指示标志和电动的防火门、窗、卷帘、阀门等消防用电，应按现行国家标准《供配电系统设计规范》GB50052的规定进行设计，一类高层建筑应按一级负荷要求供电，二类高层建筑应按二级负荷要求供电。

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