What are the reasons for frequent LED display trips? What should I do if I encounter a display trip? Xiao Bian and everyone here to discuss together.
First, the trip caused by the irrational layout of the leakage protector.
Due to the special characteristics of the full-color LED display installation site, such as incorrect wiring, broken lines, damage to the leakage protector inside the switch box, some electrical equipment not passing through the switch box, and the inevitable malfunction of the leakage protector itself. And refused to move, coupled with the actual use of electricity in the case of the leakage protection device, resulting in frequent tripping of the total leakage protection.
Second, the LED display does not form an effective secondary or tertiary leakage protection within the scope of protection.
The last-stage leakage protector in the switch box is the main protection of the power equipment. If the last-stage leakage protector is not installed, damaged or improperly selected, it may cause frequent tripping of the upper leakage protector. Due to the large number of metal conductors in the full-color LED display, there are many wire joints. If the wire insulation is not very good, it will lead to frequent leakage; some also add some sockets, in many cases do not install the leakage protection device, often Cause leakage. Only by forming an effective secondary or tertiary leakage protection mode within each protection range can the frequent tripping of the leakage protector be effectively reduced.
Third, the LED display leakage protector itself has some limitations.
Current leakage protectors, whether electromagnetic or electronic, use magnetic induction voltage transformers to pick up leakage currents in the main circuit of the electrical equipment. Three-phase or three-phase four-wires cannot be completely balanced in the magnetic ring. Full-color LED display three-phase power load can not be fully balanced, under high current or high over-voltage, it will induce a certain electromotive force in the magnetic ring with high permeability, this electromotive force is large To a certain extent, it will cause the leakage protector to trip. Because the larger rated current leakage protector uses a relatively large magnetic ring, the generated leakage magnetic flux is also relatively large, and the leakage current must overcome the magnetizing force of the magnetic ring itself, resulting in a larger rated current of the actually used leakage protector. The lower the sensitivity, the greater the rejection rate.
Fourth, full-color LED display leakage protection device in the rated leakage current and rated leakage current does not work in a certain area of ​​uncertainty, leakage protection leakage current in this area, may lead to leakage protection without Regular trip.
The application of LED display in economic life is very extensive, and it is used by many enterprises, government departments, and institutions. For production and operation safety, LED display application units must also have the necessary solutions to LED display failures.
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