户外配变低压综合配电箱的改进

吴锦虹　余伙庆

摘 要：文章设计一种安装于户外的配变低压综合配电箱，具有四个独立隔室的配变低压综合配电箱。配变低压综合配电箱的材料为不锈钢，安装在户外台区变压器上，集计量、电能分配、无功补偿功能于一体。配变低压综合配电箱分为四个独立的隔室，四个隔室相互独立，采用冷轧钢板分开，在一个室出现故障时，不会影响其他隔室；箱在侧面、电容室底部开有通风进气孔，通风进气孔内侧焊接有不锈钢丝网，既满足通风的要求，又可以满足防护等级的要求。箱体顶部采用“人”字形结构的顶盖，同时在顶盖的长边开有通风孔，用于出风散热；在箱体的底部开有进出线孔，采用专用的电缆进线格兰，防护等级高；在箱体的两侧装有M16的铜螺柱，用于搭接进线侧接地线，方便施工；门板采用内凹槽设计，凹槽内贴有硅橡胶，箱门关闭时压住箱体的凸出部，保证防护等级。

关键词：配变低压综合配电箱；独立隔室；高防护等级；散热良好；方便施工

中图分类号：TM64 文献标志码：A 文章编号：2095-2945（2019）04-0105-03

Abstract： The paper relates to a distribution transformer low voltage integrated distribution box which is installed outdoors and has four separate compartments. The material of the distribution transformer low voltage comprehensive distribution box is stainless steel， which is installed on the transformer in outdoor area and integrates the functions of metering， energy distribution and reactive power compensation. The low voltage distribution box of distribution transformer is divided into four separate compartments， the four compartments are independent from each other and are separated by cold rolled steel plate， when one room fails， the other compartments will not be affected； the box is provided with ventilation inlet holes at the side and at the bottom of the capacitance chamber. The inside of the ventilation inlet is welded with stainless steel wire mesh， which not only meets the requirements of ventilation， but also meets the requirements of the protection grade. The top of the box adopts the top cover of the "man" shaped structure， and at the same time， a vent hole is opened on the long side of the top cover for air flow and heat dissipation， and an inlet and outlet line hole is opened at the bottom of the box body， and a special cable is used to enter the line， and the protection level is high； M16 copper stud is installed on both sides of the box for lapping into the ground wire on the side of the wire for convenient construction； the door plate adopts the design of the inner groove with silicone rubber affixed in the groove and the protruding part of the box body is pressed when the door is closed to ensure the protection level.

Keywords： distribution transformer low voltage comprehensive distribution box； independent compartment； high protection grade； good heat dissipation； convenient construction

配变低压综合配电箱，是10/0.4kV供电系统中用来接受和分配电能的低压配电设备，一般安装在户外配电变压器低压侧。箱内通常配备进线断路器、配电断路器、避雷器、内部保护断路器、负荷开关、隔离开关等主电器元件。另外，还配備有电流互感器、电能表等计量电器， 以及用于低压无功补偿的电容器等设备。目前，配电箱广泛使用于农村、城市配电网和工矿企业内部配电网，安装在10/0.4kV户外台架变压器的杆架上，对低压负荷实现配电、计量、无功补偿等功能。