How to prevent outdoor LED electronic display screen from fire?

In recent years, outdoor LED electronic display fire cases have emerged in endlessly. For example, a new LED electronic screen installed in a building, running time is not long, there was a fire. Technicians are very confused, because the design and construction are carried out in strict accordance with the specifications, and there are perfect over-current protection devices on the line, which will automatically disconnect the power supply when the line is over-current. Firefighters in the analysis of the cause of the fire, there is no strong evidence to say the real cause, let’s listen to the LED display manufacturers for you.

In fact, it’s very natural that people don’t understand this phenomenon, because it’s a brand new phenomenon. This phenomenon is called harmonic current phenomenon. Harmonic current is a kind of high-frequency current, which is mainly produced in modern high-tech electronic equipment. Any high-tech electronic equipment will produce harmonic current when it works, just like any car will produce exhaust.
Why does high tech electronic equipment produce harmonic current? This is because any electronic equipment contains a rectifier circuit, and when the rectifier circuit works, it will produce harmonic current, just like the exhaust gas emitted by a gasoline engine. Electronic equipment depends on complex electronic circuits, and these electronic circuits are powered by DC. Because the power plants are all AC, so the electronic equipment must rectify the AC and convert it into DC before it can be used.
LED display is a complex electronic equipment, which contains a large number of rectifier circuits, so it produces a lot of harmonic current. Due to the popularity of electronic information equipment in recent years, people are still immersed in enjoying the convenience brought by electronic technology, and they are far from aware of the harm they bring. Just like a few years ago, people fully enjoyed the convenience brought by cars and ignored the consequences of air pollution and road congestion. In fact, the harm of harmonic current has become more and more serious, and has caused a significant impact on the safety of the whole society.