1. The layout of the leakage protector is unreasonable
Due to the special features of the Fixed LED Video Display installation site, such as wiring errors, broken lines, damage to the leakage protector in the switch box, some electrical appliances not passing through the switch box, etc., and the inevitable misoperation of the leakage protector itself. Rejection, plus the failure to arrange the leakage protector according to the actual power consumption, caused the total leakage protector to frequently trip.
In addition to strengthening management, it is necessary to rationally arrange the leakage protector according to the actual situation from the technical point of view. The leakage protector on the main power supply of the incoming line can be mainly used as the total protection against electrical fire hazards and electrical short circuits. It also serves as backup protection for each small leakage protection range. Its rated leakage current can be 200-500mA. The choice between the rated leakage operation time can be 0.2~0.3s. In this way, the influence of surge voltage, surge current and electromagnetic interference on the total leakage protector can be greatly reduced, and the selectivity and reliability of the total leakage protector operation can be improved. If the secondary leakage protection within each leakage protection range can be effectively protected, the frequent tripping rate of the total leakage protector on the site can be greatly reduced.
2. There is no effective secondary or tertiary leakage protection within the scope of protection.
The final leakage protector in the switch box is the main protection of the electrical equipment. If the final leakage protector is not installed, damaged or improperly selected, it may cause the upper leakage protector to trip frequently. Due to the large number of metal conductors in the Fixed LED Video Display, there are many wire connectors. If the wire insulation is not very good, it will lead to frequent leakage. Some sockets are added. In many cases, the leakage protector is not installed, which often causes Leakage. The frequent tripping of the leakage protector can be effectively reduced only if an effective secondary or tertiary leakage protection mode is formed within each protection range.