Publisher: Supplier of LED Display Time: 2020-05-15 Views: 2002
1. Unreasonable tripping caused by leakage: Due to the particularity of the installation site of the LED electronic display, such as our common wiring errors, broken lines, damage to the leakage protector of the switch box, and electrical appliances not passing through the switch box, etc. Many reasons. These are unavoidable misoperation and refusal to operate, and there is no protection measure for the leakage protector according to the electricity consumption, so the total leakage protector frequently trips.
2. There is no secondary or tertiary leakage protection within the protection scope of the LED display: many people may not know that the final leakage protector in the switch box is the main protection of the electrical equipment. If the final leakage protector is not installed, or choose Improper type, or damage due to careless use after installation, may cause frequent trips. Because there are many metal conductors and wire connectors in the full-color display screen, if the wire insulation is not good, it will lead to frequent leakage of electricity. Some LED display manufacturers have also added sockets, in order to form an effective secondary or tertiary leakage protection mode within each protection range, so as to effectively reduce the frequent tripping of the leakage protector.
3. The leakage protector itself has certain limitations: the current leakage protector, whether it is electromagnetic or electronic, uses a magnetic induction voltage transformer to pick up the leakage current in the main circuit of the electrical equipment, three-phase or three-phase four-wire Complete equilibrium that is impossible to arrange in a magnetic ring. The three-phase electrical load of the LED electronic display screen is even more impossible to be completely balanced. Under high current and high voltage, a certain electromotive force will be induced in the magnetic ring with high magnetic permeability. This electromotive force exceeds a certain level and will lead to leakage protectors. Frequent trips.
In fact, the leakage protector of the LED display screen has an uncertain area between the rated leakage current and the rated leakage non-operating current. When the leakage current of the leakage protector fluctuates in this area, it is likely to cause the leakage protector to be irregular. trip.
Nowadays, LED displays are widely used in our daily life, and are often used by companies to advertise products and governments to promote public information. But even so, for the safety of our production and operation, the LED display must have a solution to the failure before it is used.