Summarize 9 knowledge points of street lamp design
Release time:
2024-06-27 11:27
Author:
If it is an outdoor lamp, in order to avoid the danger of leakage, the leakage switch will be set, and the 4P switch will be used at this time.
Is the main switch of street lamp 3P or 4P?
If it is an outdoor lamp, in order to avoid the danger of leakage, the leakage switch will be set, and the 4P switch will be used at this time.
If the leakage is not considered, the main switch can choose 3P switch.
2 The advantages and disadvantages of different layout of street lamps
One-sided layout-suitable for relatively narrow roads, he requires the installation height of the lamp is equal to or greater than the effective width of the road. The advantage is good inducibility and low cost, but the disadvantage is that the brightness (illuminance) of the road surface on the side without the lamp is lower than that on the side where the lamp is set.
Staggered arrangement-the installation height of lamps is required to be not less than 0.7 times the effective width of the road surface. The disadvantage is that the longitudinal uniformity of brightness is poor, and the inducibility is not as good as the unilateral arrangement. Symmetrical arrangement-the installation height of lamps is required to be not less than half of the effective width of the road surface.
3 reasonable choice of street lamp installation height, cantilever length and elevation angle?
Installation height (h)-The economic installation height of the gas discharge lamp is 10-15m. If the installation height is too low, the glare of the lamp increases, and the excessive glare decreases, but the lighting utilization rate decreases.
1) The cantilever length should not exceed 1/4 of the installation height.
the impact of the cantilever is too long:
(1) Reduce the brightness (illumination) of the sidewalk and curb on the side of the lamp.
(2) The mechanical strength of the cantilever becomes higher, which affects the service life.
(3) affect the appearance, resulting in the proportion between the cantilever and the light pole is not coordinated.
4) The cost will increase.
2) Elevation angle: The elevation angle of the lamp should not exceed 15 degrees.
The installation elevation angle of the lamp is to increase the illumination range of the lamp on the road surface. Overdrive will cause increased glare, slow lanes and reduced brightness of sidewalks.
4 The reasonable power compensation choice of street lamp?
The power factor of all kinds of lamps is increased to more than 0.9 by single lamp dispersion compensation, which can reduce the capacity of street lamp special transformer by more than 51%, and the line loss is reduced by about 75%, thus playing a significant role in energy saving.
5 street lamp control mode
In line with the principle of practical energy saving, follow the practice of most cities today, according to the different requirements of different traffic periods of illumination design using a combination of light control and clock control control methods.
That is, when the traffic volume is large after dark, light up all street lamps to ensure the safe passage of pedestrians and vehicles; after midnight, with the reduction of traffic volume, turn off all street lamps on one side by clock control to achieve the most economical energy-saving effect on the premise of ensuring normal traffic.
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