Indoor and outdoor full-color LED display distribution box frequent tripping how to do

Time:2018-10-29 Views:833

Some people always ask why the power distribution box of LED full color screen trips frequently?Below LED full color screen manufacturer on LED full color screen frequent tripping to do a simple analysis.Hope to solve your LED full color screen distribution box trip puzzle.

Generally, there are four factors for frequent tripping of power distribution box with full-color LED display: unreasonable distribution of leakage protector, no effective secondary or tertiary leakage protection within the protection range, limitations of leakage protector itself (unbalanced three-phase power consumption), unreasonable selection of leakage protector, etc.

1. Unreasonable layout of leakage protector

Due to the particularity of the installation site of the LED full-color display screen and the inevitable misoperation and rejection of the leakage protector itself, coupled with the failure to arrange the leakage protector according to the actual situation of power consumption, the total leakage protector frequently trips.

LED display solution: in addition to strengthening management, this situation also requires reasonable arrangement of leakage protector according to the actual situation from a technical perspective.

2. There is no effective secondary or tertiary leakage protection within the protection scope

The final leakage protector in the switch box is the main protection of the electrical equipment. As there are many metal conductors and wire joints in the LED full-color display screen, if the wire insulation is not good, it will lead to frequent leakage of electricity.Some also added a few electrical outlet, in a lot of time do not install leakage protector, often cause leakage.

LED display solution: only effective secondary or tertiary leakage protection mode can be formed within each protection range to effectively reduce the frequent tripping of leakage protector.

3. The leakage protector itself has certain limitations (three-phase electrical imbalance)

The current leakage protector, whether electromagnetic or electronic, USES the magnetic induction voltage transformer to pick up the leakage current in the main circuit of the electrical equipment.The three-phase power load of the LED full-color display screen cannot be completely balanced. Under the large current or high overvoltage, a certain electromotive force can be induced in the magnetic ring with high magnetic conductivity. This electromotive force is large enough to cause the leakage protector to trip.

4. Unreasonable selection of leakage protector

Rating of the switch used in the leakage current action more than 30 ma or is more than rated current electrical equipment more than twice the leakage protector, or with the delay type leakage protector, due to the increase of leakage current action rating or a reduction in the protection sensitivity, the leakage fault occurs, the end leakage protector without action, the higher leakage protector can action.

LED display solution: when the LED full-color display is energized, the starting current is usually relatively large, which may make the leakage protector trip.As a result, the display case should be charged as many times as possible.In addition, generally should choose to surge over voltage, over current is not too sensitive to electromagnetic leakage protector;Or select an electronic leakage protector 1.5~2 times larger than the rated current, but as the final level leakage protection, the rated leakage action current should not be greater than 30mA.