LED full color display frequent trip is why? Below the LED full color display frequently tripped to do a simple analysis. Hoping to solve your LED full color display trip problem.
1, leakage protector layout is unreasonable
As the LED full color display installation site has the special nature, such as wiring error, line damage, switch box leakage protection damage, some electrical appliances have not been through the switch box and other reasons, and leakage protection itself is inevitable And refused to move, coupled with no electricity in accordance with the actual situation on the leakage protection device layout, resulting in frequent leakage protector frequent trip.
In addition to strengthening the management of this situation, but also from the technical point of view, according to the actual situation of the leakage protection device for a reasonable layout. The total leakage protection on the incoming power supply can be used as a total protection for the prevention of electrical fires and electrical short circuits. It also provides backup protection for each small leakage protection range. Its rated leakage current can be in the range of 200 ~ 500mA Between the choice of rated leakage action time can choose 0.2 ~ 0.3s. In this way, can greatly reduce the surge voltage, inrush current, electromagnetic interference on the total leakage protection, improve the overall leakage protection action selectivity and reliability. If you can make each leakage protection within the scope of the two leakage protection in an effective protection of the state, you can greatly reduce the site of the total leakage protector frequent trip probability.
2, within the scope of protection does not form an effective two or three leakage protection
The last-stage leakage protector in the switch box is the main protection of the electrical equipment. If the last-stage leakage protector is not installed, damaged or improperly selected, it may cause the superior leakage protector to trip frequently. As the LED full color display a lot of metal conductors, wire connectors are more, if the wire insulation is not very good, it will lead to frequent leakage of the situation; some also added some sockets, in many cases do not install leakage protector, often Resulting in leakage. Only in each protection within the scope of the formation of an effective two or three leakage protection mode, in order to effectively reduce the frequent leakage of leakage protection.
3, leakage protector itself has some limitations
(1) the current leakage protection, whether electromagnetic or electronic type are using magnetic induction voltage transformer pick up the main circuit in the leakage current, three-phase or three-phase four-wire in the magnetic ring can not be fully balanced layout. LED full-color display of the three-phase power load can not be fully balanced in the high current or higher over-voltage, will have a high magnetic permeability in the magnetic induction of a certain electromotive force, the electromotive force To a certain extent, it will lead to leakage protector tripping. As the rated current of the larger leakage protection using a relatively large magnetic ring, the leakage flux is also relatively large, and the leakage current to overcome the magnetic force of the magnetic ring itself, resulting in the actual use of the leakage current rating of the larger , The lower the sensitivity, the greater the rate of rejection.
(2) leakage protection device in the rated leakage current and the rated leakage current does not have a movement between the uncertainty of the area, the leakage current leakage in the protection of this area may cause the leakage protection device tripping.
4, leakage protector selection is unreasonable
(1) the use of the switchgear within the rated leakage current exceeds 30mA or more than twice the rated current of the electrical equipment leakage protection device, or use a delay with the type of leakage protection, due to the rated leakage current Improve or protect the sensitivity of the decline, the occurrence of leakage failure, the final leakage protector no action, the higher leakage protection device may be action.
(2) to the LED full color display when the power is often relatively large, this high current may make the leakage protector tripping. Therefore, as far as possible to batches to the display panel power. In addition, the general should be used on the over-voltage, over-current is not sensitive to the electromagnetic leakage protector; or select the rated current 1.5 to 2 times larger than the electronic leakage protection, but as the final leakage protection, rated leakage action The current should not be greater than 30mA.
In short, the frequent leakage of leakage protection device is the result of a combination of various factors, the most important thing is to properly arrange leakage protection, reduce the protection of two or three leakage protection range, the correct choice of leakage protector and wiring, so that each The scope of the two or three leakage protector in an effective state of protection; the other is to strengthen the management of electricity and through training to improve the quality of their own people to prevent non-electrical wiring, so that you can not only improve the safety of electricity, And can reduce the frequent leakage of the leakage protector, to LED full color display of the normal work to create a better power supply conditions.