Table of Contents [hide]
The large-scale application of LED street lamps in the current society has played a decisive role in the progress of lighting engineering, especially the energy saving and low carbon of LED street lamps have made important contributions to society. Let's talk about the daily use process. 10 things that LED street lights should pay attention to.
The characteristics of the lighting material of the LED street lamp determine that it is affected by the environment. For example, if the temperature changes, the current of the LED will increase accordingly; in addition, the current of the LED will also increase with the increase of the voltage. If the current exceeds the rated current for a long time, it will greatly shorten the service life of the LED lamp beads. LED constant current is to ensure that the current value of its work remains unchanged when environmental factors such as temperature and voltage change.
The constant current accuracy of some power supplies on the market is poor, the error may reach ±8%, and the constant current error is too large. The general requirement is ±3%. According to the 3% design scheme. The production power supply needs to be fine-tuned to achieve ±3% error.
Generally, the recommended working voltage of LED is 3.0-3.5V. After testing, most of them work at 3.2V, so it is more reasonable to calculate according to 3.2V. The total voltage of N lamp beads in series = 3.2*N
For example, the rated working current of the LED is 350 mA. Some factories use it up at the beginning, and the design is 350 mA. In fact, the working current under this current is very serious. After many comparison tests, it is ideal to design 320 mA. . Minimize heat generation and allow more electrical energy to become visible light energy.
In order to make the LED street lamp power supply work in the range of AC85-265V with a wide input voltage range, the series-parallel mode of the LEDs of the lamp board is very important. Try not to use a wide voltage, and it can be divided into AC220V and AC110V as much as possible, so as to ensure the reliability of the power supply. Since the current power supply is generally a non-isolated step-down constant current power supply, when the required voltage is 110V, the output voltage should not exceed 70V, and the number of series connections should not exceed 23 strings. When the input voltage is 220V, the output voltage can reach 156V. That is to say, the number of concatenations does not exceed 45 strings. The number of parallel connections should not be too many, otherwise, the working current will be too large and the power supply will heat up seriously. There is also a wide voltage solution, APFC active power compensation is to first use L6561/7527 to raise the voltage to 400V, and then step down, which is equivalent to two switching power supplies. This program is only used under certain conditions.
Generally, the isolated power supply is made into 15W and placed in the power tube of the LED street light. The transformer is very large and difficult to put in. It mainly depends on the space structure and depends on the specific situation. Generally, the isolation can only achieve 15W, and there are few more than 15W, and the price is very expensive. Therefore, the cost-effectiveness of isolation is not high. Generally, non-isolation is more mainstream, the volume can be made smaller, and the minimum height can be 8 mm. In fact, there is no problem with non-isolation safety measures. It can also be used as an isolated power supply if space permits.
In fact, if you choose an optimal series-parallel connection method, the voltage and current applied to each LED are the same, and the effect of the power supply can exert the best performance. The best way is to communicate with the power supply manufacturer first and customize it. Or produce your own power supply.
Input power minus output power value, this parameter is particularly important, the larger the value, the lower the efficiency, which means that a large part of the input power is converted into heat and dissipated; if it is installed in the lamp, it will generate a very high temperature, coupled with the heat emitted by a light efficiency ratio of our LED, it will superimpose a higher temperature. And the life of all electronic parts inside our power supply will be shortened as the temperature rises. Therefore, efficiency is the most important factor in determining the life of the power supply. The fundamental factor, the efficiency can not be too low, otherwise, the heat consumed by the power supply is too large. The efficiency of the non-isolated type is higher than that of the isolated type, generally more than 80%. However, the efficiency is related to the matching connection method of the lamp board.
The main factor of the heat dissipation scheme is that the use of LED street lamp beads under the condition of not overheating can greatly prolong life. Generally, aluminum alloy is used, which is easier to dissipate heat. That is, the LED street lamp power supply beads are attached to the aluminum substrate, and the external heat dissipation area is expanded as much as possible.
The main factor for heat dissipation is that the LED street lamp power beads can be used under the condition of not overheating, which can greatly prolong life. Generally, an aluminum alloy radiator is used, which is easier to dissipate heat. That is, the LED street lamp power supply beads are attached to the aluminum substrate, and the external heat dissipation area is expanded as much as possible.
The specific use of the height of the led street light pole depends on the width of the road. Generally, if the lights are arranged on one side, the height of the led street light is the same as the width of the road surface. Generally, the height of a 30-60w street lamp is less than 6 meters, the height of a 60~100w street lamp is less than 9 meters, and the height of a 100-150w street lamp is less than 12 meters.
Some people will ask how good the installation distance of outdoor led street lights is. The interval between led street lights and street lights is also the distance of street lights, which is determined by the lighting power of the lighting led street lights, the height of the street lights, the width of the road, and other factors. There are also villages that can buy according to the capital budget. Root street lights, and then calculate the spacing. In theory, the spacing of led street lights is generally 3.8-4 times the height of the lamp pole. The longitudinal spacing of street lights is generally 30 meters to 50 meters. When there are power lines or other poles, the time distance is 40 meters to 40 meters. 50 meters.
If you want to make your street light more intelligent and practical, then we recommend you install the following accessories on the street light.
Through these accessories, you can realize intelligent management of your street lamps, which not only saves energy but also greatly saves the labor cost of maintenance.
As a manufacturer of led street lights, ZGSM does not recommend the use of traditional street lights but recommends the use of led street lights. Since the technology of led street lights is relatively mature and the price is relatively cheap, more importantly, compared with these traditional light sources, the life of led street lights is relatively good in energy saving and easy to maintain in the later period.
Here, we recommend the star product among many products, the Rifle series led street light. It is not only beautiful in appearance but also has complete functions. The most important thing is that it is very cost-effective. Whether it is used for government projects or personal use, it is the best choice.
|150w Cobra Head LED Street Light||Round LED Street Light||200w Modular Design LED Street Light Head|
|100w Economical Smart LED Street Light||LED Post Top Light|
|LED Street Lighting project in Croatia||LED Street Light project in Ukraine||LED Street Light project in Italy|
|LED Street Light project in Norway||LED Street Light project in Slovakia||LED Street Light project in Colombia|
About 15 to 20 years
LEDs use up to 50% less energy than standard sodium bulbs and can last for 15 to 20 years. There are also some surprising advantages. Better street lighting may make it easier to use public transit by reducing the feeling of danger and increasing visibility on the roads.
Metal Halide(MH) Street Lights
High Pressure Sodium (HPS) Street Lights
High-intensity discharge ( HID ) street lighting
Low Pressure Sodium (LPS) Street Lights
Narrow-Band Amber (NBA) LED Street Lights
Share the Post
Copyright © Hangzhou ZGSM Technology Co., Ltd. All Rights Reserved