I, mine, mine definition of the engine room and induction into Zhiji Lei Lei protection. Zhiji Lei protection of the main building from the lightning rod installed by the completion of the mine-room (including room and weak power system mine information system) is mainly caused by mine-induced lightning surges and other causes too Voltage.
 The computer equipment more than 95 percent of lightning damage is caused by lightning sensors, and its main ways:
1, outdoor transmission lines from lightning
2, the Lightning electromagnetic pulse radiation
 3, to counter potential
4, industry over-voltage
 Second, mine's installation:
 Mine traps should be installed in all external lines (communications, electricity and other metal transmission medium) into the engine room of port equipment, as the case may be used 1-3 mine.
 Third, the engine room grounding programme grounding system is the engine room of an important component of the environment, it is not only a direct impact on the communications room communications equipment room and the quality of the normal operation of power systems, but also a personal protection equipment and security role.
 Grounding system is grounded in, the introduction of ground, ground or ground-ranked aggregation of wiring and grounding.  The main resistance grounding system by the grounding of the soil near the resistance by the decision.  If the higher rate of soil resistance, can not achieve less than 4 ohm ground resistance requirements, it is necessary to use artificial methods to reduce ground resistance.
1, room grounding system design objectives
 In a scattered way grounding, grounding resistance requirements are as follows:
 (1) The grounding resistance ≤ 4 Ω
 (2) the protection of ground resistance ≤ 4 Ω
(3) mine grounding resistance ≤ 10 Ω
 2, integrated grounding system requirements:
 1), computer systems DC direct ground resistance of less than 4 ohm
 2), computer systems DC United grounding resistance is less than 1 ohm
 3), the exchange of grounding system ground resistance of less than 4 ohm
4), the computer system security protection grounding resistance and electrostatic grounding of less than 2 ohms
5), lightning protection grounding system ground resistance of less than 2 ohms
 3, grounding the type of
Ground work: use of the land as a working circuit in a wire
 The protection of ground: the use of the land to establish a unified information from potential or shielding, so that the circuit stability, good quality, especially the equipment and ensure the safety of staff.
 Grounding repeat: the zero line with the Earth many times more of a metal link.
 Static Grounding: mobile equipment or mobile objects in the pipeline, due to static electricity generated friction, it gathered in the pipe to, containers and storage or processing equipment, a high potential, and the personal safety of the equipment and buildings are dangerous.  A static grounding, once a static, to import, to eliminate the possibility of their gathering.
 DC grounding work (also known as logical grounding, signal ground): micro-computer, and all the equipment, most using CMOS integrated circuits, working at a lower DC pressure, in order for the same system of computers, microelectronics devices work circuit Have the same "potential" point of reference, all equipment will be "zero" potential access points installed on the same ground, it can stabilize the potential circuit to prevent foreign interference, this is known as the DC grounding work.
 Lightning Protection: To enable lightning surge current China into the earth, to be protected from Zhiji Lei of mine, such as sensors or over-voltage surges, against the current, all of the buildings, electrical equipment, lines and networks do not live Metal parts, metal sheathing, arrester, as well as all water, gas pipelines, and so should be grounded and mine-metallic devices for connecting.