UL (Underwriters Laboratories Inc.) is an American organization engaged in product safety certification and standard safety development, and has a great influence in North America and the world. Headquartered in the United States, it has been engaged in product evaluation and standard preparation for 110 years. It has more than 18,000 products tested each year, and has more than 19 billion UL marks on its products. There are more than 60 subsidiaries around the world. According to EliPuszkar, general manager of the lighting planning business department of UL, UL is working on a series of safety assessment standards involving LEDs.
In the technological innovation of lighting, the application of LED is undoubtedly the most exciting, it will change the structure of the entire lighting market, and its wide application is just around the corner. When it comes to LEDs, the technology itself is not a new thing. Many years ago, LEDs were used as indicators for instruments and equipment. With the development of technology, the performance and improvement of chips and materials have been greatly improved, which has greatly improved the brightness and life of LEDs, thus promoting the wide application of LEDs in more fields.
Nowadays, many manufacturers have launched their own LED lighting products. With the large-scale use of LED lighting products, we will see LEDs will be the mainstream of lighting applications in the near future. The long life and almost no maintenance are deeply attracted to many luminaire designers, coupled with their low energy consumption, adaptability, controllability of color and brightness, etc. Will become the new darling of lighting products.
In order to ensure that the new LED lighting products can be accepted and trusted by the public like ordinary lighting fixtures, UL has begun to develop LED safety assessment standards.
When developing a new product, manufacturers should consider the following factors that affect safety:
Prevent electric shock
In order to prevent electric shock, it is generally treated separately for two cases: 1. LED products powered by a power supply; 2. LED lamps directly connected to the grid or powered by non-power supplies. For LED products using power supply, there is no danger of electric shock due to the voltage and current limitations of the power supply; for products using other power supplies, the insulation performance and the accessibility of the charged body need to be evaluated, and Meet the requirements of the standard. However, when using a power supply, consider a special use situation - humid environment, if the product is used in a humid environment, its open circuit voltage should not exceed 15V AC (30 V DC).
Avoid causing fire
In order to avoid fire, many aspects of the product should be tested and evaluated, such as LED spacing, heat sink construction and materials, housing type and installation location and working methods. Although the power supply is used to limit the energy of the product to avoid or reduce the fire when designing the product, according to UL's past experience, such products are still likely to reach temperatures above 90 °C (installed in the US National Building Code) The temperature of the equipment on the surface of ordinary flammable materials shall not exceed 90 ° C). Therefore, when designing LED luminaire products, this aspect should be taken into consideration, and temperature testing is required. The surface temperature of each component in the luminaire should be within its own rated temperature range.
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In the technological innovation of lighting, the application of LED is undoubtedly the most exciting, it will change the structure of the entire lighting market, and its wide application is just around the corner. When it comes to LEDs, the technology itself is not a new thing. Many years ago, LEDs were used as indicators for instruments and equipment. With the development of technology, the performance and improvement of chips and materials have been greatly improved, which has greatly improved the brightness and life of LEDs, thus promoting the wide application of LEDs in more fields.
Nowadays, many manufacturers have launched their own LED lighting products. With the large-scale use of LED lighting products, we will see LEDs will be the mainstream of lighting applications in the near future. The long life and almost no maintenance are deeply attracted to many luminaire designers, coupled with their low energy consumption, adaptability, controllability of color and brightness, etc. Will become the new darling of lighting products.
In order to ensure that the new LED lighting products can be accepted and trusted by the public like ordinary lighting fixtures, UL has begun to develop LED safety assessment standards.
When developing a new product, manufacturers should consider the following factors that affect safety:
Prevent electric shock
In order to prevent electric shock, it is generally treated separately for two cases: 1. LED products powered by a power supply; 2. LED lamps directly connected to the grid or powered by non-power supplies. For LED products using power supply, there is no danger of electric shock due to the voltage and current limitations of the power supply; for products using other power supplies, the insulation performance and the accessibility of the charged body need to be evaluated, and Meet the requirements of the standard. However, when using a power supply, consider a special use situation - humid environment, if the product is used in a humid environment, its open circuit voltage should not exceed 15V AC (30 V DC).
Avoid causing fire
In order to avoid fire, many aspects of the product should be tested and evaluated, such as LED spacing, heat sink construction and materials, housing type and installation location and working methods. Although the power supply is used to limit the energy of the product to avoid or reduce the fire when designing the product, according to UL's past experience, such products are still likely to reach temperatures above 90 °C (installed in the US National Building Code) The temperature of the equipment on the surface of ordinary flammable materials shall not exceed 90 ° C). Therefore, when designing LED luminaire products, this aspect should be taken into consideration, and temperature testing is required. The surface temperature of each component in the luminaire should be within its own rated temperature range.
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