Energy efficient LED lighting as a light source, a very good prospects, but the LED technology still has some technical bottlenecks and weaknesses, which is a phenomenon LED curing.
LED power supply sulfur-free identification report, developed by Jinjian detection LED quality laboratory, the test content is more than forty pages, to confirm whether the 40 or 40 kinds of raw materials in LED lamps contain sulfur, chlorine and bromine. This report is very important for lighting factories because the silver-plated layer of LED light source reacts easily with gases containing sulfur, chlorine and bromine to form black silver sulfide, silver chloride and silver bromide, resulting in lamp beads. Black is invalid.
When the LED vulcanization phenomenon occurs, the lighting factory first checks the production, storage, and power aging environment of the luminaire, but ignores the built-in power supply of the luminaire. There are thirty or forty kinds of raw materials in the LED power supply, which may also contain sulfur, chlorine and bromine. In a closed, high temperature environment, these sulfur, chlorine and bromine elements may volatilize into gases and corrode the LED source. Therefore, LED lighting factories must provide power supply manufacturers with sulfur-free identification reports for LED power supplies when purchasing power.
Materials that may contain sulfur/chlorine/bromine on the LED power supply are:
1.PCB board: The circuit board produced in the market has a certain content of sulfur residue. Although the PCB circuit board manufacturer will clean the board in the process process and eliminate the residue of sulfur-containing chemical solvent, the ordinary production process is difficult to complete. Cleaned.
2. Sulphur-containing rubber power cord and rubber-based insulating packaging plastic: vulcanized rubber can maintain elasticity for a long time in the temperature range of -65~250 °C, and has excellent electrical properties and chemical stability, waterproof, ozone resistant and weather resistant. Aging, combined with simple usage and strong process applicability, is widely used in the electronics industry as a coating, potting and packaging material for electronic components.
3. Printed circuit board, outer casing, plastic: halogen compounds such as PBB, PBDE, TBBP-A, PCB, hexabromododecane, tribromophenol, short-chain chlorinated paraffin, etc. are often used as flame retardants in printed circuit boards. Shell, plastic and other materials. When the power source is heated, these materials will volatilize the halogen-containing gas. When the halogen-containing gas is combined with the acidic nitrogen-containing water vapor, corrosive harmful gases are generated and the LED is corroded. According to many scientific studies, halogen-based flame retardants have become pollutants that spread throughout the daily environment, releasing harmful substances during combustion and heating, threatening the health of the human body, the environment and the next generation. The use of halogen-based flame retardants is contrary to the environmental performance of LEDs. Therefore, Jinjian Testing recommends that LED material suppliers use halogen-free flame retardant materials as much as possible.
4. Solder paste flux: The activator component in the flux usually contains a small amount of halogen or organic acid component, which can quickly eliminate the oxide film on the surface of the soldered metal, reduce the surface tension of the solder, and spread the solder rapidly on the soldered metal. surface. The halogen is usually bromine/chlorine, which turns silver into black silver bromide/silver chloride.
Case 1: A serious vulcanization phenomenon occurred in the T8 lamp of a lighting factory, and the gold was entrusted to find the source of sulfur. Because the blackening of the lamp bead near the built-in power supply is the most serious, Jinjian has done the LED power supply sulfur identification for the power supply, and found that the content of the sulfur element in the power supply is as high as 17%. After the in-line resistor and the lamp bead are baked in a sealed high temperature environment, the lamp bead appears black, which proves again that the lamp bead vulcanization black failure is caused by the built-in power source. Therefore, Jinjian advises customers to do sulfur extraction identification for power supply, and requires power supply manufacturers to provide LED power supply sulfur-free identification report.
LED power supply inspection material picture
Feed Through Terminal Block Section
Feed Through Terminal Block.
In the electrotechnics, the terminal refers to the terminal and is designed to run through the terminal production. The type is divided into single hole, double hole, socket, hook, etc. from the material, copper silver plating, copper zinc plating, copper, aluminum, iron, etc. their functions are mainly to transmit electrical signals or conduct electricity. The unit of terminal block is "bit", and one wiring bit is "bit". Usually the so-called table is the serial number of the terminal, which has different definitions in different applications. "Jie" and "bit" have the same meaning, but they are called differently. Groups are made up of sections.
Feed Through Terminal Block
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