How to choose the power distribution cabinet for LED display?

In today’s rapidly developing digital information, LED display screens have the advantages of high brightness, high definition, and rich colors. They have been widely used in advertising media, sports stadiums, stage performances, traffic control and many other fields. However, the normal operation of LED display screens is inseparable from a stable and reliable power supply.

A suitable distribution cabinet can not only ensure the safe and stable operation of LED display screens, but also extend the service life of equipment and reduce maintenance costs. So, facing the dazzling array of distribution cabinet products on the market, how should we choose? Next, Doitvision will guide you purchasing LED display distribution cabinets detail.

Understand the power characteristics of LED display screens

Capacitive load and instantaneous high current

The LED display screen is powered by a large number of switching power supplies and belongs to capacitive loads. When the LED screen is started, due to the charging characteristics of the capacitor, the instantaneous current is extremely large, so it is very easy to impact the power grid, which may cause damage to the electrical equipment.

For example, some electrical equipment with lower power may fail because they cannot withstand this impact. Therefore, for more than 20KW LED display screens , you must be equipped with a distribution cabinet with a distributed step-by-step power-on function to slow down the current impact and protect the power grid and equipment.

High power and high safety requirements

The area of ​​today’s LED display screens is getting larger and larger, ranging from more than ten square meters to dozens or even hundreds of square meters, and the power of the entire screen is also increasing.

Such high-power electrical appliances cannot be sloppy in terms of safety. Problems such as lightning strikes and overloads may cause major safety accidents such as short circuits, screen burns, and fires. A small problem with the distribution cabinet may cause a million-dollar LED display screen to fail, causing huge economic losses.

Clarify the role of the distribution cabinet

The main function of the LED display screen distribution cabinet is to realize power distribution control, distribute electrical energy to various load parts, and perform power-off protection when short circuits, overloads, and leakage occur in the circuit.

It mainly supplies power to the LED screen, supports AC380V power input, is protected by an air switch, and outputs 220V power. The chassis of the distribution cabinet is specially designed to effectively prevent leakage and is safer to use. In addition, the distribution cabinet is also equipped with a power indicator light to facilitate users to understand the power status.

Be familiar with the types of commonly used distribution cabinets

Classification by power-on function

• PLC programmable control cabinet: remote power-on and intelligent control can be achieved through PLC programming. This type of distribution cabinet has a high degree of flexibility and automation. Users can set different power-on modes and time parameters according to actual needs, which is convenient for remote management and control of LED display screens.
• Multi-function card intelligent distribution cabinet: equipped with a multi-function card, it can realize a variety of intelligent control functions, such as time switch, overload protection, leakage protection, etc. It is simple to operate and rich in functions, and can meet the diverse needs of different users.
• Timed distribution cabinet: using microcomputer time control technology, users can pre-set the power-on and power-off time to realize the timed switch function. If you need an LED display screen with timed content, this function is very practical, such as the advertising screen in the mall, the information screen at the station, etc.
• Manual power-on distribution cabinet: manual operation is required for power-on and power-off, the operation is relatively simple, but it lacks automation and intelligent functions. It is suitable for some occasions where the control requirements are not high.
• Button power-on distribution cabinet: the power-on operation is realized by pressing the button, which is also simple to operate, but the function is relatively single.
• Aviation box mobile distribution cabinet: It is portable and mobile, suitable for LED display screens that need to be moved frequently, such as stage performances, outdoor activities and other occasions.

Classification by the nature of the distribution cabinet

• Indoor wall-mounted type: installed on the indoor wall, saving space, suitable for the power supply of indoor small LED display screens.
• Indoor floor-standing type: placed on the indoor floor, with a large capacity, can meet the power needs of large indoor LED display screens.
• Outdoorwaterproof wall-mounted type: with waterproof function, can be installed on the outdoor wall, suitable for outdoor small LED display screens.
• Outdoor waterproof floor-standing type: large capacity and good waterproof performance, suitable for large outdoor LED display screens, such as squares, stadiums and other places.

Classification by distribution cabinet material

• Stainless steel type: It has the characteristics of corrosion resistance, beautiful and generous, suitable for places with high requirements for hygiene and environment.
• Cold-rolled steel plate type: high strength and relatively low price, it is a more commonly used distribution cabinet material.
• Iron sheet type: low cost, but relatively weak protection performance, suitable for some occasions with low protection requirements.
• Aluminum alloy die-casting type: light weight, good heat dissipation performance, easy to install and transport.
• Plastic shell type: has good insulation and protection performance, suitable for some special environments.

Key points for correctly selecting full-color LED  display distribution cabinet

Distribution cabinet box size

Full-color LED display power is different, and the required distribution cabinet size is also different. Accurate distribution box size can save installation space and control costs. When you choose a distribution cabinet, you should choose a distribution cabinet of appropriate size according to the actual power and installation space of the LED display to avoid waste or installation difficulties caused by too large or too small.

Power and number of distribution boxes

Users can choose the number of power configuration circuits according to the display screen of different areas, and the power of the distribution cabinet can be customized from 0 to 250KW. If you can reasonably choose the power and number of circuits, you can let the distribution cabinet provide a stable and reliable power supply for the LED display while avoiding resource waste.

Operation of the distribution cabinet box

LED display construction has the characteristics of multiple outgoing lines and concentrated strong and weak electricity. Therefore, you’d better choose a product that is simple to operate and easy to install. In addition, the distribution cabinet should reserve the inlet and outlet connectors to make on-site construction quick and convenient. This will save on-site construction time and improve construction efficiency.

Professionalism of the distribution cabinet

The product should be designed and manufactured in strict accordance with national and industry standards, with beautiful craftsmanship, safety and reliability. Professional distribution cabinets can improve the grade of supporting equipment.

Economy of the distribution cabinet

In the design, you should also fully consider the economy of on-site construction and wiring, and use electrical materials appropriately and effectively. On the premise of meeting functional requirements, please choose a cost-effective distribution cabinet as much as possible to reduce project costs.

Power consumption characteristics of LED display screens

Consider the power consumption characteristics of full-color LED display screens, such as large impact currents. The distribution box should adopt a multi-section partition power supply method to effectively reduce the load and ensure the normal startup and operation of the display screen.

Type of distribution box

Select distribution boxes (cabinets) of different materials and types according to the installation environment of the LED display screen.

For the distribution control box (cabinet) installed on the LED outdoor screen, its shell should have dustproof, rainproof and anti-electric shock protection functions, and the protection level should not be lower than IP43. There should be a water seepage outlet at the lowest part of the bottom of the box (cabinet) to adapt to the harsh outdoor environmental conditions.

Distribution box control method

As we said before, the control method of the LED display distribution cabinet. Users can choose the appropriate control method according to actual needs to achieve flexible control of the LED display.

Lightning protection device of the distribution cabinet

LED display is a relatively expensive commodity, so you have to consider the safety of the LED display application. You should install a lightning protection device on the distribution box to protect the LED display from lightning damage.

Internal component brand of the distribution cabinet

The choice of the main component brand inside the distribution box product affects the reliability of the display power supply system. When you select materials, you should follow the relevant standards for electrical power distribution to ensure the quality and performance of the distribution cabinet.

Seek professional design and customization

Due to the variable specifications of LED display screens, the requirements for distribution cabinets are also different. We recommend designing and making according to the requirements of project customers. You can design the most suitable distribution settings according to the specific project characteristics.

A professional project engineer can fully consider various factors, such as the power of the display screen, the installation environment, the control method, etc., to provide customers with personalized solutions and effectively improve the overall efficiency of the project.

Summary

A good LED display power distribution cabinet can ensure the safe and stable operation of the LED display. When you are purchasing, you should fully understand the power consumption characteristics of the LED display. We hope that the introduction can help you purchase the LED display power distribution cabinet. If you need an LED display or encounter any technical problems, you can feel free to contact us.