The LED display is powered by a large number of switching power supplies and has a capacitive load. When the screen is started, the instantaneous current is very large, which is easy to form an impact on the power grid and cause damage to the electrical equipment. Therefore, the display with a power exceeding 20KW should be equipped with a belt distribution Power distribution cabinet with step-by-step power-on function.
The LED display is powered by a large number of switching power supplies and has a capacitive load. When the screen is started, the instantaneous current is very large, which is easy to form an impact on the power grid and cause damage to the electrical equipment. Therefore, the display with a power exceeding 20KW should be equipped with a belt distribution Power distribution cabinet with step-by-step power-on function.
The current LED display screens are often more than ten square meters, and the larger ones are dozens of hundreds of square meters, and the power of the whole screen is relatively large. For such high-power electrical appliances, there is no room for sloppy safety in use, and major safety accidents such as short circuit, screen burn, fire, etc. may be caused by lightning strikes and overloads at any time. If millions of LED displays fail just because of a small power distribution cabinet problem, it is really a small loss. And some customers find electricians in the market to customize power distribution cabinets according to power consumption. In the customization process, you should find a professional electrician to communicate technical matters face-to-face, for fear that omissions will cause installation troubles and waste a lot of time and energy.
led display
The role of the LED display power distribution cabinet is to control the distribution of electrical energy to various load positions, and to perform power-off protection when the circuit is short-circuited, overloaded and leaked. It mainly supplies power to the LED screen. It supports AC380V power input, air switch protection, and 220V power output. The chassis adopts a special design to prevent the possibility of leakage, and it is safer to use. It has a power indicator light.
What kinds of distribution cabinets are commonly used for LED displays?
The power distribution equipment adopts AC three-phase five-wire system. The LED display power distribution cabinet divides the three phases into three phase zero voltages for the display screen. You can remotely control the power distribution equipment and switch the LED display in the control room.
So what kinds of power distribution cabinets are commonly used for LED display screens? The power distribution cabinets generally used by LED display screen manufacturers can be divided into the following categories:
1. According to the power-on function, it can be divided into PLC programmable control cabinet (PLC remote power-on smart power distribution cabinet), multi-function card smart power distribution cabinet, timing power distribution cabinet (microcomputer time-controlled power distribution cabinet), Manual power-on power distribution cabinet, button power-on power distribution cabinet, air box mobile power distribution cabinet, etc.;
2. According to the nature of the power distribution cabinet, it can be divided into indoor (indoor) wall-mounted type, indoor (indoor) floor type, outdoor (outdoor) waterproof wall-mounted type, outdoor (outdoor) waterproof floor type, etc. ;
3. According to the material of the power distribution cabinet, it can be divided into stainless steel type, cold-rolled steel plate type, iron sheet type, aluminum alloy die-casting type, plastic shell type and other types. The above types of power distribution cabinets are commonly used by LED display customers. Of course, some displays use special power distribution cabinets. Customers can design the power distribution cabinet according to the specific use environment of the LED display.
10 aspects of correct selection of LED full-color display power distribution cabinet:
1. The size of the power distribution cabinet:
The power of the full-color LED display is different, and the size of the power distribution cabinet used is also different. The accurate size of the power distribution box can save installation space and control costs.
2. Power and number of distribution boxes:
Users can choose the number of power configuration loops according to different areas of the display screen, and can be customized from 0-250KW.
3. The operability of the power distribution cabinet:
The construction characteristics of the LED display screen-many outgoing lines, strong and weak current concentration, the product design is the result of many years of practical experience in LED display engineering, fully taking into account the results of the practical experience of LED display engineering, and taking full account of the LED display The construction characteristics of the project fully consider the special needs of the actual project. Choose products that are simple to operate and easy to install; the inlet and outlet connectors are reserved, and the on-site construction is quick and convenient, which can save on-site construction time.
4. Professionalism of the power distribution cabinet:
The products are designed and manufactured in strict accordance with national and industry standards, with beautiful craftsmanship, safe and reliable, and greatly improved the grade of the supporting equipment.
5. The economy of the power distribution cabinet:
The economics of on-site construction and wiring are fully considered in the design, and electrical materials are used appropriately and effectively;
6. The electricity consumption characteristics of LED display:
Fully consider the power characteristics of the full-color LED display, for example, the impact current is too large, the distribution box can effectively reduce the load, and the multi-section power supply method is adopted;
7. Box type of distribution box:
Different materials and different types of power distribution boxes (cabinet) can be selected according to the LED display installation environment. The power distribution control box (cabinet) for the installation of LED outdoor screens should have dust-proof, rain-proof and electric shock protection functions. The grade should not be lower than IP43, and there should be a water seepage outlet at the lowest part of the bottom of the box (cabinet).
8. Distribution box control mode:
The control mode of the LED display power distribution cabinet is diversified, and it can use PLC, multi-function card system, microcomputer time control switch, button power-on, manual local control, etc.
9. Lightning protection device of power distribution cabinet:
LED display screens are relatively expensive products, so the general LED display screen manufacturers will consider the safety of the display screen, so they will consider installing lightning protection devices for the distribution box, choosing appropriate lightning protection devices, and solving the problem of lightning protection for power supply equipment outdoors. The interference problem.
10. Brand of internal components of power distribution cabinet:
In order to fully consider the reliability of the power distribution box, the choice of the main component brands inside the power distribution box product affects the power supply system of the display screen. The use of well-known brands has reliable performance and is a strong guarantee for the reliable power supply of the display screen. The selection of materials and materials are based on electrical power distribution. Related standards. The specifications of the LED display screen are changeable, and the demand for the power distribution cabinet is also different. It is designed and manufactured according to the requirements of the project customer. Professional engineers design the most suitable power distribution setting according to the specific project characteristics to effectively improve the overall efficiency of the project.
