Interpretation of the new national standard LED industry ahead of the road

Lack of standards has been a bottleneck restricting the development of LED industry. To this end, by the end of 2009, the National Standardization Management Committee issued a number of LED related standards. The introduction of a series of new standards will help promote the development of China's LED lighting industry more standardized and healthy.

After more than 1 years of transition, a number of LED standards will be implemented in November this year, in succession in December. The day before, the national electric light source quality supervision and Inspection Center (Shanghai) deputy director Yu Anqi said that although the standard will soon be implemented, but still there are a lot of people in the industry to understand the connotation of standard is not comprehensive. In the first LED general lighting products and technology seminar, Yu Anqi detailed interpretation of some of the important new GB of the main terms, characteristics and scope of application and other issues.

GB24819-2009 general lighting LED module safety requirements

The standard was promulgated in November 30, 2009 and began to be implemented in November 1, 2010. Yu Anqi said that the standard is equivalent to the use of IEC62031 2008. According to the installation method, the module is divided into integral, built-in, independent, which is the same as the control principle of the GB19510 series lamps. The main body of the basic provisions of the standard GB19510.1 and GB7000.1 standard, its biggest feature is the use of IEC62471 2006 lamp and lamp system, the safety of biological standards. This is because can enter the room, taking into account the LED lighting products, may be seen directly in a close range, so the proposed eye protection requirements, and after using the IEC60825 laser device standard does not apply.

LED performance requirements for GB/T24823-2009 modules for general lighting applications

The standard has several characteristics: first, the power factor requirements in accordance with the declared value, the measured value shall not be less than 0.05 of the declared value; the two is the harmonic should comply with the requirements of GB17625.1. It is worth noting that the above two only applies to the LED module that is directly connected to the power supply from the town, the other by the driver. In addition, the provisions of the radio interference (EMI) characteristics should be in line with the requirements of GB17743, but only directly connected to the power supply of the LED module needs to be "power terminal harassment" detection, the other is borne by the driver. Only when the driving current frequency of LED is greater than 100Hz, the "300MHz" (9KHz ~ 30MHz and 30MHz ~ ~) can be carried out". At the same time, electromagnetic compatibility immunity (EMS) should comply with the requirements of GB/T18595, but only the direct connection of the power supply of the LED module need to carry out anti pulse group detection, the other LED module is still borne by the driver. The standard also requires that the ESD test should be carried out in general, but only on the LED module with radio frequency interference or power frequency interference. The optical properties of this standard are performed by GB/T24824.

Test method of LED module for GB/T24824-2009 general lighting

The standard mainly refer to the CIE127 2007 standard, the detection method of the key is: monitoring the measured LED module specified temperature measuring point temperature requirements. Yu Anqi said that this is because other light sources in the premise of ensuring the stability of the power supply, to ensure the stability of the ambient temperature of the light source, you can get good repeatability of the test results. However, LED is only to ensure the stability of the ambient temperature is not good repeatability of the test results, so the temperature measurement point of the temperature requirements.

For light, color and electrical performance parameters detection method, standard test or measurement LED module should work in a state of thermal equilibrium, in the monitoring of ambient temperature at the same time, best can monitor the LED module itself working temperature, to ensure the repeatability test. If the LED module junction voltage may be monitored, the junction voltage should be preferred. Otherwise, the temperature of the specified temperature measuring point should be monitored by the LED module. Thus, monitoring the junction voltage is preferred.

When the external radiator (including active cooling), should monitor and control the temperature of the LED module, because the LED heat sink radiator and the contact surface can not maintain a good thermal resistance, so monitoring and control of the LED module with its own temperature, in order to ensure the detection of the. Monitoring and control of the LED module to detect their own junction temperature, that is, monitoring the junction voltage conditions to measure the light, color, electrical parameters is to ensure the detection of the first choice for reproduction.

GB24906 - 2010/IEC62560 general lighting with more than 50V self ballasted LED lamp safety requirements

The standard equivalent to the use of IEC standards. The standards are similar to those of the GB16844/IEC60968 self ballasted fluorescent lamp standard terms and methods, since both methods of use and possible safety problems are almost identical.

Yu Anqi said that the current standard compared with the flow of fluorescent lamps, it is difficult to do is HV (220V ~ 250V) of the lamp, through the 4000V dielectric strength test. Because the lamp to have good heat dissipation, the radiator are exposed in the appearance (contact component), LED and the radiator to ensure small thermal resistance, but also to ensure the thickness of insulation layer and clearance, it is difficult to co-existence, at present sample of multinational corporations also failed. The effective solution is to isolate the circuit or adopt the high thermal conductivity ceramic material. Performance requirements for GB/T24908 - 2010 self ballasted LED lamps for general lighting applications

The standard and GB/T17263/IEC60969 have more similarities. But in the standard IEC IEC62612 has released 2009 CPS files, this is obviously different from the standard of our country, in addition to the lumen maintenance test, also no load intermittent high temperature test, impact test and high temperature accelerated test switch. It should be said that IEC62612 has a more complete assessment requirements. Yu Anqi mention