机房接地规范（Machine room grounding code）.docVIP

机房接地规范（Machine room grounding code） The grounding system is an important part of the environment of the computer room. It not only directly affects the communication quality of the communication equipment in the computer room and the normal operation of the power supply system of the engine room, but also plays a role in protecting personal safety and equipment safety. The grounding system is composed of grounding body, grounding introduction line, earth wire disk or earthing connecting line and earthing wiring. The resistance of the grounding system is mainly determined by the resistance of the soil near the grounding body. If the soil resistivity is high and the grounding resistance is less than 4 ohm, the method of manual grounding resistance reduction must be adopted. 1 、 the design target of the grounding system of the computer room When using the dispersed earthing mode, the ground resistance requirements are as follows: (1) the work of grounding resistance is less than or equal to 2. (2) the protection of grounding resistance is less than or equal to 4. (3) lightning protection and grounding resistance is less than or equal to 10. Our company grounding system requirements: 1. Direct current grounding resistance of computer system is less than 4 ohm 2 、 the DC joint ground resistance of the computer system is less than 1 ohms 3. The grounding resistance of AC work grounding system is less than 4 ohms 4 、 computer system safety protection, grounding resistance and static grounding is less than 2 ohms 5. Earthing resistance of lightning protection earthing system is less than 2 ohms 2. Earthing Types Work grounding: a wire that uses the earth as a working circuit Protective earthing: the use of the ground to establish a unified reference potential or shielding effect, so that the circuit work stability, good quality, especially to ensure the safety of equipment and staff. Repeat ground: connect multiple points on the zero line with the earth several times as a g