数据中心机房供配电系统由高压配电、变压器、配电柜、线缆传输、UPS系统、空调制冷系统配电、照明配电、列头柜、机架PDU等环节组成。数据中心机房的等级分为A级、B级、C级。数据中心机房A级为例，

The power supply and distribution system of data center computer room consists of high voltage distribution, transformer, distribution cabinet, cable transmission, UPS system, distribution of air conditioning and refrigeration system, lighting distribution, header cabinet, frame PDU, etc. The data center computer room is classified into A, B and C levels. Data Center Computer Room Class A as an example,

UPS设备和空调设备必须有柴油发电机作为备用电源。正常电源失电，改由高压柴油发电设备来供电后，高压柴油发电系统的中性点接地方式就是供电系统接地。

UPS equipment and air conditioning equipment must have diesel generators as standby power supply. When the normal power supply loses power and is supplied by the high-voltage diesel power generation equipment, the neutral grounding mode of the high-voltage diesel power generation system is the grounding of the power supply system.