1. The fixed partition low-voltage cabinet is equipped with plug-in switches, which are installed in an independent fixed partition small room. The switch plug-in structure separates the main body and the base. The base is fixed to the base plate, and the reverse side is convenient for connecting cables. The switch body can be unplugged with electricity for easy maintenance or replacement. This structure is suitable for the power supply output of the transformer rear panel. The contact surface between the molded case switch body and the base is large, with stable clamping and reliable contact. There is independent space for the switch, busbar, primary cable, and secondary wiring, with good ventilation and heat dissipation. The device wiring, protection, and maintenance are safe and convenient.

2、抽屉柜便是把开关、接触器热继电器等元器件会集在一个抽屉单元里，该型式的长处是可以把很多元器件一次抽出，便于整体快速替换，一般用于多回路、小容量场合，例如MCC柜，会集照明操控等；但它因为选用了抽屉接插件，导轨的误差及在背后的插件不可目视，往往形成接触不良，特别容量较大（例如开关容量大于100A）场合，往往形成接触点发热乃至焚毁的结果。

2. A drawer cabinet is a type of drawer unit that gathers switches, contactors, thermal relays, and other components together. The advantage of this type is that it can extract many components at once, making it easy to replace them quickly as a whole. It is generally used in multi circuit and small capacity situations, such as MCC cabinets, centralized lighting control, etc; However, due to the use of drawer connectors, the errors in the guide rails and the insertions behind them are not visible, often resulting in poor contact, especially in situations with large capacities (such as switch capacities greater than 100A), which often result in contact point heating or even burning.

3、数据中心用户的低压柜馈电输出，一般都没有接触器热继电器等元器件，根本不需求用抽屉结构型式，且大多为250A塑壳开关，选用抽屉柜不只有安全风险（需求长时间运转及屡次抽出后才能反映出来），而且热量散发、装置接线、保护保养等也不便利。二次接线端和一次电缆接线柱在同一个空间，多功能丈量外表等数据传输线敷设也会受到强电的干涉，牢靠性较固定分隔式有所下降。因为增加了抽屉结构，经济性也较固定分隔式略差

3. The low-voltage cabinet feed output of data center users generally does not have components such as contactors and thermal relays, and there is no need to use drawer structure. Most of them are 250A molded case switches. Choosing a drawer cabinet not only poses safety risks (it requires long-term operation and repeated extraction before it can be reflected), but also inconvenient for heat dissipation, device wiring, protection and maintenance. The secondary terminal and the primary cable terminal are located in the same space, and the laying of data transmission lines such as multifunctional measurement surfaces will also be affected by strong electrical interference, resulting in a decrease in reliability compared to fixed and separated types. Due to the addition of a drawer structure, the economy is slightly worse than that of a fixed partition type

4、数据中心的负载相对比较稳定，为了供给数据中心功率，一般都是满负荷匹配。据悉，不少数据中心在运转中发现了有抽屉柜热量不容易散发的问题，运维人员为了下降热量，选用了打开柜门、用风扇强制冷却的被动手法，乃至调整削减输出回路，下降数据中心功率。我认为这个都和建造阶段选用抽屉柜有关，后续的补救都是无奈之举。

4. The load of the data center is relatively stable, and in order to supply power to the data center, it is generally matched at full load. It is reported that many data centers have discovered the problem of drawer cabinets not easily emitting heat during operation. In order to reduce heat, operation and maintenance personnel have chosen passive methods such as opening cabinet doors, using fans to force cooling, and even adjusting and reducing output circuits to reduce data center power. I think this is all related to the selection of drawer cabinets during the construction phase, and subsequent remedial actions are helpless.