What Are The Common Faults Of Lawn Lights?
Feb 23, 2021
There are two types of common faults: one is high-resistance fault; the other is low-resistance fault. The so-called high-resistance fault means that the cable is blown, the measuring resistance of the instrument is large, or the insulation drops between phases or the ground, but there is a certain resistance; the so-called low-resistance fault means that the wire is shorted or completely shorted to the ground, and the current Increase, trip phenomenon occurs in power transmission. These two failures and their frequent occurrences pose a threat to the normal use of lawn lights. Therefore, we must pay full attention to find out the reasons and countermeasures.
The main cause of lawn lamp failure
1. Poor construction quality
Faults caused by construction quality account for a larger proportion. Main manifestations: First, the depth of the cable trench is not enough, and the construction of sand-covering bricks is not carried out according to the standard; the second is that the production and installation of the aisle pipe does not meet the requirements, and the two ends are not made according to the standard. The third is when laying the cable. Dragging on the ground; fourth, the embedded pipe of the foundation is not constructed according to the standard requirements, mainly because the embedded pipe is too thin, coupled with a certain degree of curvature, it is quite difficult to pass the cable, and there is a "dead bend" at the bottom of the foundation; It is because the thickness of the wire nose crimping and insulation wrapping is not enough, it will short-circuit between phases after a long time of operation.
2. The materials are not good enough
Judging from the failure situation of the situation in recent years, the low quality of the material is also a big factor. The main performance is: the wire contains less aluminum, the wire is relatively hard, and the insulation layer is thin. This is more common.
3. The quality of supporting projects is not too hard
Lawn light cables are generally laid on the green belt. The construction quality of the sidewalk is poor, and the ground sinks, which causes the cable to be deformed by force, which leads to the cable armor. Especially in the northeast region, which is located in the high cold zone, the winter comes, so that the cables and the soil form a whole. Once the ground subsides, it will be strained at the bottom of the lawn lamp foundation, and in summer when there is a lot of rain, it will burn at the root of the foundation.
4. Unreasonable design
One aspect is overload operation. With the continuous development of urban construction, lawn lights continue to extend. When new lawn lights are built, they are often close to which lawn lights are connected to which circuit. In addition, the advertising business is developing rapidly, and the advertising load is also connected to the lawn lights accordingly. The load of the lawn lamp is too large, the cable is overheated, the wire nose is overheated, the insulation is reduced, and the grounding short circuit occurs; on the other hand, the lamp pole design only considers the situation of the lamp pole itself, ignoring the space of the cable head, and the cable head package After winding, most of them cannot even close the door. Sometimes the length of the cable is not enough and the joints do not meet the requirements. This is also the cause of the failure.
