Safety Protection And Grounding Method Of Landscape Light

Safety protection and grounding methods of Landscape Light :

1. The safety protection and grounding of outdoor landscape lights and street lights are mainly due to the long power supply lines of night scene lighting projects such as parks and overpasses, and it is not economical to use safe voltage for power supply. Therefore, when strict protection measures against accidental electric shock are provided, the Normal voltage supply is.

2. The two grounding systems must be truly separated electrically, and a certain distance must be met underground, otherwise the two grounding systems are formally separated, but not actually (electrically) separated. Moreover, due to the mutual connection of the two electrical systems, strong interference is generated through the mutual connection of the grounding devices, and even the two grounding systems cannot work normally in severe cases. Examples of this in real work are fairly common. In some places, the distance between the two grounding systems is only 5m, which is generally not enough. In practical applications, at such a close distance, it is found that mutual interference is still quite large. The test proves that in the case of a single ground electrode, it can be regarded as zero potential only when it is 20m away from the ground electrode. In the case where the grounding system is multiple grounding electrodes or even a grounding grid, the zero-potential position may still be too small if the distance specified above is 20m, but for general engineering, when the two grounding systems are 20m away from each other, The impact is very weak, as long as it is handled properly, it can work normally.

3. Since the sensitivity of the single-phase short-circuit protection of the TT system is lower than that of the TN system, the fuse and circuit breaker refuse to act from time to time, resulting in the exposed conductive part with a dangerous voltage close to 110V for a long time, and the residual current action protection device is used. It can greatly improve the sensitivity of the contact protection of the TT system, making the TT system more secure and reliable.

4. This article stipulates that the lightning protection of night scene lighting equipment should comply with the relevant current national standards.

5. This article is formulated to prevent the conscious or unconscious contact danger of unrelated personnel.

6. The transformer used is a special transformer different from other types of lighting. This kind of transformer must supply a high voltage of 10000-15000V to break down the gas medium in the neon glass tube so that the tube starts to discharge and emit light. Therefore, there are special regulations for the high-voltage wiring and connecting lines of the transformer, the distance between the wirings, the installation place of the neon lights, the lamp bracket, the material of the light box, etc., which should be strictly implemented to ensure the safety of use.