What issues need to be considered in the construction of weak current engineering computer rooms?

UPS power is developing in the direction of high power, low noise, intelligence and networking, which is exactly what the central computer room needs. High-power UPS power supplies (such as 20, 30, 60KVA and above) mostly have parallel redundancy function. The emergence of hot-swappable, modular battery arrays further improves the reliability of power supply. This is because the "array structure" was previously used to improve the reliability of the "disk array" of computer networks.

Application of anti-static floor

Anti-static mainly refers to eliminating static charges generated in various places in the equipment room in time. Triboelectricity is a natural phenomenon. The accumulation of static electricity can cause accidents and endanger electronic equipment and personal safety. Therefore, the equipment room should use an anti-static floor to discharge static charges through grounding. The floor is generally 0.3m away from the ground. In order to ensure the construction quality, the computer room project should be undertaken by a unit with the qualification for the construction of the computer room project.

Third, the lightning protection and grounding design of the computer room

A large number of electronic equipment in the central computer room have lower working voltages, more precision equipment, and poor resistance to lightning strikes. Once suffered, they often suffer huge losses. Therefore, the lightning protection level is higher here, and the measures for preventing various lightning strikes are higher. There are many types of lightning strikes. The lightning protection measures in the equipment room are mainly aimed at direct strikes and induction lightning. The general method is to set lightning rods and lightning strips on the top of the building to prevent direct lightning strikes; interconnect the main ribs of the whole structure in the building to form equipotential Faraday cages and equalizing rings to prevent side lightning strikes (at 30 meters and above, The third layer uses ring beam reinforcement to connect the main reinforcement in the column to form a pressure equalizing ring); the foundation of the building is interconnected with a pile conductor to form a good ground and the ground potential distribution in the building. In addition, the metal equipment and ruhu metal pipes on the building surface are well connected with the grounding grid to ensure the equipotential in the building.

In order to prevent high-voltage lightning waves from invading the equipment in the equipment room, various anti-overvoltage devices can be used at the front end of the equipment in the equipment room. For example, setting a three-level lightning protection device in front of the network equipment can effectively shunt the voltage limit to prevent the intrusion of induced lightning waves. The third level refers to the front end of terminals such as the power supply terminal, UPS terminal, server, or distribution frame. In addition, the antenna feeders, signal lines, data communication lines, etc. of outdoor lead-in indoors should be equipped with lightning arresters at ruhu.

The grounding system includes lightning protection grounding, AC working grounding, DC grounding, PE protective grounding, shielding grounding, and antistatic grounding. The latter three can be interconnected. The grounding method generally uses a joint grounding method, that is, lightning protection grounding, protective grounding, and working grounding are directly connected to the grounding network. The total grounding resistance should be less than 1 ohm, which is the so-called zero grounding resistance. A special grounding device can also be provided when conditions permit.

In digital circuits, the logic ground that provides the equipotential plane and the signal ground that provides the reference potential in analog circuits become the DC ground. The reference potential of the DC grounding system is drawn from the total equipotential copper bar. In engineering, an insulated copper core wire with a cross-sectional area of ​​35 square millimeters can be passed through the protective tube to the weak current equipment as the DC ground.

There are many AC and DC filters in electronic equipment. They are used to prevent interference voltages of various frequencies from invading ru through the power line, so as not to affect the operation of low-level signal devices. The ground of the AC / DC filter is called power ground. The power grounding system uses insulated copper core wires with cross-sections such as phase conductors to lead from the distribution box to the weak current equipment. This ground wire is connected to the N wire (ie, the neutral wire) in the TN-S five-wire system.

Shield grounding and anti-static grounding are to solve the problems of electromagnetic radiation and electromagnetic interference. With the increasing number of high-frequency communication facilities in intelligent buildings, anti-interference is becoming increasingly important. Electromagnetic interference is parasitic electrical energy radiated by electronic systems. It can reduce the accuracy of data transmission, increase the bit error rate, affect the clarity, and cause electromagnetic environment pollution. In order to prevent external electromagnetic interference, the outer shell of the electronic device and the shielded wire or the threaded metal pipe inside and outside the device are grounded. The whole shield is called shield grounding. Generally, the environment in the equipment room is relatively dry, and it is easy to generate static electricity, which will cause interference to electronic equipment. The ground used for this purpose is an anti-static ground. The general method of shielding grounding and anti-static grounding is: PE weak electric mains are led from the general equipotential copper bars in the building, and each floor is provided with weak electric equipotential copper bars. The shell of electronic equipment, metal pipes and antistatic grounding are all at this potential. Copper bars are connected.

In addition to the above measures, the security protection facilities of the equipment room should also have access control, anti-theft, CCTV monitoring, firewall software, and fire alarms.

Guangzhou Laian Intelligent System Development Co., Ltd. specializes in computer room monitoring, computer room construction, indoor and outdoor integrated cabinets, temperature and humidity monitoring of various systems, etc. Welcome to call 13922289957