Analysis of Power Supply and Distribution System for Integrated cabling Data Center Environment Design

The power distribution system should meet the requirements of the Information Equipment Room, ensure the reliability and flexibility of power supply, ensure personal safety, facilitate construction, maintenance and management, and achieve advanced technology, economic and reasonable. The lighting system complies with relevant national regulations. More integrated wiring: test the Integrated Wiring Optical Fiber Transmission Channel

1. Design Principles

Advanced technology and high reliability: integrated management, good flexibility, high system security, strong confidentiality, easy extension, easy maintenance, economical and practical, reasonable and advanced.

2. Power supply

The power supply of Computer Room adopts the wiring method of 380/220 V voltage, 50Hz frequency and three-phase five-wire (namely TN-S system. Because the equipment rooms are divided into computer equipment and computer auxiliary equipment, these two equipment have different requirements for power supply, so use two different power supply, that is, a common power supply, one is an uninterruptible power supply. General power supplies power to computer auxiliary equipment, such as air conditioners, lighting, maintenance sockets, and auxiliary sockets. uninterrupted power supplies supply to computer equipment, such as servers, hosts, terminals, routers, switches, firewalls, and other devices.

The two power supplies introduce different distribution boxes, that is, they are installed in the common power distribution boxes and UPS power distribution boxes in the host room, and then the distribution boxes are respectively sent to computer equipment and computer auxiliary equipment.

3. control and protect devices

In order to ensure safe and reliable operation of the equipment, the power supply is accurate, sensitive, and powered off, the power supply control and protection equipment should use reliable and sensitive air switches (some with leakage protection ). Provides overload protection, short circuit protection, and leakage protection depending on the device situation to ensure power control and equipment security.

4. Computer-specific location

The DC location of the computer system is also called the logic location. In order to make the computer work normally, the DC ground is the zero potential reference point, but not necessarily the ground potential. If the ground system is connected to the Earth through a low-resistance path, it is called a ground connection. If the grounding system is not connected to the Earth, but insulated from the Earth, it is called dc suspension. Generally, after proper treatment, grounding is implemented, that is, Series grounding-multi-point grounding, parallel grounding-single point grounding and network grounding are used.

In order to realize the grounding resistance R ≤ l ohm, the metallic parts (such as steel pipes, angle steel, flat steel, and round steel) buried in the ground are called artificial grounding bodies; the basis of metal components, metal well pipes, reinforced concrete and other buildings directly in contact with the Earth, as well as metal pipes and equipment, used as the grounding body. The metal wires connected to and directed to the grounding body are called grounding wires, and the sum of the grounding body and ground wires is called a grounding device.

5. Cable Laying and pipe Wiring

With the system diagram, each low-voltage distribution box is equipped with an ampersand, voltmeter, and indicator light. The power distribution cabinet is designed based on the actual electricity usage and expandable capacity. The estimated power consumption is 30 kW. The grounding adopts the TN-s mode and three-phase five-wire system. The zero line and the ground line are strictly separated. The UPS Power Supply Mode is 3 × 16mm2 + 2 × 10mm2 Flame-Retardant Cable introduced into the cabinet.

Considering that the cable in the IDC room is affected by the ambient temperature and the poor heat dissipation conditions, the current load of the cable is obtained at a temperature of + 40 ℃. All cables use flame retardant power cables or flame retardant cross-linked power cables to meet the fire protection requirements of the IDC. All Cabinet equipment and wall-ground sockets are deployed through a 200mm × 50mm floor tray, and the part of the incoming wall is completed through a JDG20 pipe or plastic hose. To prevent leaking of the ground in the IDC room, the wires and cables are soaked. All metal trough under the floor are connected to the trough bracket, which is higher than 5 cm of the ground.

The power cords of lamps and sockets in the ceiling are fire-resistant and heat-resistant polyvinyl chloride insulated copper core cables, laid in electric cables, and metal hoses are worn at the end of cables to prevent mouse bites. All wiring headers use soldering or crimping caps. All metal tubes, metal trough, and metal hoses are reliably grounded. The connection between a metal pipe and a metal pipe, between a metal wire slot and a metal wire slot, and between a metal pipe and a metal wire slot is connected through a cross-ground wire. When the metal wire trough passes through different fireproof zones, the fireproof materials are closed to reduce the spread of fire.

6. Lighting System

Lighting power supply of computer room belongs to the category of auxiliary power supply system, but it has a certain degree of particularity and independence. The lighting quality of the IDC not only affects the efficiency and physical and mental health of computer operators and software and hardware maintenance personnel, but also affects the reliable operation of the computer. Therefore, reasonable selection of lighting methods, lighting types, layout and related equipment cannot be ignored in electrical engineering decoration.

Because the division of labor varies between different rooms in the data center, the requirements for illuminance are also different. The average illuminance of the data center can be set to lx, lx, and lx. The average illuminance of the first type of auxiliary work room is 100LX, l50LX, and 200LX. The second and third types of auxiliary rooms can be referred to for execution. At the same time, the requirements of lighting uniformity, lighting stability, color rendering of the light source, glare and shadow are mentioned on the agenda, these factors also have an inestimable impact on operators and maintenance personnel.

General lighting is also called general lighting or general lighting. It refers to the illumination of a certain part of the whole place or place with uniform illumination. Hybrid lighting refers to adding local lighting to form the so-called hybrid lighting when the general lighting does not meet local requirements. Emergency lighting, also known as emergency lighting, refers to lighting that can be used to handle the work left behind by computers or for the transfer of personnel and equipment after normal lighting is rectified due to a fault or power failure. After a power outage in the city, efficient emergency lights are used in the data room to ensure that the staff perform storage and other emergency treatment. After the mains supply is stopped, it is automatically put into operation. Emergency lighting is powered by UPS power supply, and no dead corners are arranged evenly. A power supply is provided by the power distribution cabinet in the whole area to set emergency lighting. A set of emergency evacuation indicator lights are added to the host room.

The lighting layout should be based on the appearance of the data center, the importance of the location and the location of the equipment. From the perspective of the appearance of the data center, the layout of the lamps should be arranged evenly, that is, the direction of the lamps should be kept at a certain distance in the vertical and horizontal directions, and the direction of the lamps should be determined based on the area of the data center; the lamps should be arranged according to the nature and function of the position to achieve better results. Meanwhile, the position of the equipment should also be considered to avoid shadow, easy to maintain and other factors.

The data room lighting materials should choose the lamps without a return device or electronic ballast, the lamps with lamps and anti-glare lamps, the lamps that can also be used as air conditioners and the overall decorative lamps with high luminous efficiency.

Lighting fixtures adopt the decentralized control mode, that is, the opening of the lamps is controlled through the wall raver switch.