LED display screen power supply system

A technology of LED display screen and power supply system, applied in the direction of panel/switch station circuit devices, etc., can solve the problems of frequent tripping of leakage protectors, unreasonable power supply scheme design, etc., to improve selectivity and reliability, and reduce surge voltage. Effect

Inactive Publication Date: 2015-03-11
LICERAM ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a power supply system for LED display screens, which solves the problem of frequent tripping of leakage protectors in the prior art due to unreasonable design of power supply schemes

Method used

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Examples

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Comparison scheme
Effect test

specific Embodiment 1

[0030] A power supply system for a P20 full-color LED display, including a distribution box, a switch box, a first-to-third-level leakage protector, an LED display box distributed in 4 rows and 5 columns, and the main power inlet line of the distribution box is set The first-level leakage protector, the second-level leakage protector is installed on the power inlet line of the switch box, and the third-level leakage protector is installed on the power inlet line of the LED display box. The external 380V AC is input to the distribution box, and the 210V~ The 230V voltage is output to the switch box, and the switch box outputs the 210V~230V voltage to the LED display cabinet, and the power supplies of two adjacent LED display cabinets are connected in cascade.

[0031] The AC / DC power supply module in each LED display cabinet is a 220V / 5V power supply module.

[0032] The switch box outputs 5-way 220V power lines, which are respectively connected to the lowermost cabinet power s...

specific Embodiment 2

[0037] A power supply system for a P6 full-color LED display, including a distribution box, a switch box, a first-to-third-level leakage protector, an LED display box distributed in 10 rows and 15 columns, and the main power inlet line of the distribution box is set The first-level leakage protector, the second-level leakage protector is installed on the power inlet line of the switch box, and the third-level leakage protector is installed on the power inlet line of the LED display box. The external 380V AC is input to the distribution box, and the 210V~ The 230V voltage is output to the switch box, and the switch box outputs the 210V~230V voltage to the LED display cabinet, and the power supplies of two adjacent LED display cabinets are connected in cascade.

[0038] The AC / DC power supply module in each LED display cabinet is a 220V / 5V power supply module.

[0039] There are two switch boxes, one of which outputs 15 channels of 220V power lines, and the other switch box outp...

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PUM

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Abstract

The invention discloses an LED display screen power supply system comprising a distribution box, switch boxes, leakage protectors and LED display screen boxes. The main power supply wire of the distribution box is provided with a first leakage protector, the power supply wire of the switch boxes is provided with a second leakage protector, and the power supply wire of the LED display screen boxes is provided with a third leakage protector; an external 380V alternate current is input into the distribution box, the 210V to 230V voltage is output to the switch boxes after voltage transformation, the switch boxes output the 210V to 230V voltage to the LED display screen boxes, and two adjacent LED display screen boxes are connected to the power supply in a cascading manner. The power supply manners of three stage power supply and three stage leakage protectors are adopted, the influence on a main leakage protector by surge voltage, current and electromagnetic interference is reduced greatly, and the selectivity and reliability of actions of the main leakage protector are improved.

Description

technical field [0001] The invention belongs to the application field of electronic products, and in particular relates to a power supply system of an LED display screen. Background technique [0002] The low-voltage distribution system consists of a distribution substation (usually reducing the transmission voltage of the grid to a distribution voltage), a high-voltage distribution line (that is, a voltage above 1 kV), a distribution transformer, and a low-voltage distribution line (1 kV The following voltage) and corresponding control and protection equipment. [0003] Low-voltage circuit breaker: Low-voltage circuit breaker, also known as automatic switch, is an electrical appliance that not only has the function of manual switch, but also can automatically protect against voltage loss, undervoltage, overload, and short circuit. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, etc., and can automaticall...

Claims

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Application Information

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IPC IPC(8): H02B1/24
CPCH02B1/24
Inventor 孙道明司马云吴会利谢中明
Owner LICERAM ELECTRONICS TECH
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