LED lighting products are closely related to the personal safety of consumers.
We should strengthen the study and research of foreign laws and regulations, strictly control the quality of LED products and eliminate potential leakage hazards;
Strengthen the cooperation with third-party testing institutions and professional testing equipment manufacturers, track the quality of all production links of products,
and monitor the whole process from product design, production, key process, first article detection to finished product sampling inspection.
Led enterprises should pay more attention to product quality and should not miss the development opportunity because of quality problems. As a lighting enterprise or equipment supporting supplier, these test equipment or schemes should be understood!
Formulate unified inspection items and inspection instructions for lamps produced by the company.
2、 Reference basis:
GB7000.1-2002 general safety requirements and tests for lamps, measurement methods for integral LED street lamps, and technical data for distribution photometer
Enclosure protection class (IP code) gb4028-93 III. inspection items: 1. Electrical performance parameters:
a) Operating voltage. b) Operating current. c) Power. d) Power factor. e) Safety level of lamps. f) Electrical strength. g) Leakage current. h) Insulation resistance. 2. Optical parameters:
a) Light intensity: light intensity distribution curve and equal light intensity curve.
b) Luminous flux: total luminous flux, effective luminous flux, regional luminous flux table and annular luminous flux table.
c) Illuminance: illuminance distribution, isoilluminance curve.
d) Light source: light source quantity, light source model, light source composition, light source packaging. e) Color temperature. f) Color coordinates. g) Luminous angle of lamps.
3. Structure and appearance:
a) Shell structure material. b) Type of lamp. c) Weight of lamps. d) Label of lamps. e) Degree of protection of lamps. 4. Reliability test:
a) Temperature rise test. b) Switching power test.
c) Vibration test. d) Luminescence maintenance characteristics and aging test. e) Impact test. f) Lamp function inspection.
4、 Inspection instructions: 1. Electrical parameters:
a) DC power supply lamps controlled by external power supply: voltage and current measured by Voltmeter and ammeter.
(Note: to measure the current, it is necessary to measure the current of LED single lamp and single color, which is recorded in attached table 1)
b) AC powered lamps with built-in power control: measure the voltage, current, power, power factor and other parameters of lamps with digital power meter.
c) Class I lamps must be tested for electrical strength, leakage current and insulation resistance. The electrical strength is 220V, the terminal and the shell are 1500V, and there is no flashover and breakdown in 1min. Leakage current ≤ 1.0mA. Insulation resistance ≥ 2m Ω. d) The safety level of lamps can be divided into four types:
Class 0 lamps: lamps without ground wire, which rely on basic insulation as anti electric shock protection, which means that the accessible conductive parts of the lamps are not connected to the power supply of the facilities
The protective conductor in the fixed line has to rely on the environment in case of basic insulation failure.
Class I lamps: lamps with ground wire. The protection against electric shock of lamps not only depends on basic insulation,
It also includes additional safety measures, that is, connecting the accessible conductive parts to the protective grounding conductor in the fixed line of the facility, so that the accessible conductive parts will not be charged in case of basic insulation failure.
Class II lamps: lamps without ground wire. The protection against electric shock is not only based on the basic insulation, but also has
Additional safety measures, such as double insulation or reinforcement, but no measures to protect grounding or dependent on installation conditions.
Class III lamps: the protection against electric shock depends on the power supply voltage, which is safety extra low voltage (AC voltage)
The effective value is less than 50V) and will not produce lamps with voltage higher than SELV. (what is SELV voltage: the voltage between conductors or between conductors and the ground (RMS) does not exceed 42V, the no-load voltage (RMS) does not exceed 50V, and the voltage shall be obtained through the safety isolation transformer. That is to say, the requirements of double insulation or reinforced insulation shall be met between the high voltage and the safety ultra-low voltage. The safety ultra-low voltage is commonly referred to as "SELV")
2. Optical performance parameters:
a) Light intensity (CD): light intensity distribution curve, equal light intensity curve and light intensity distribution data table
Can be measured with a distribution photometer.
b) Luminous flux (LM): total luminous flux and effective luminous flux measured by spectral analysis system
Subject to. The regional luminous flux table and annular luminous flux table can be measured with a distribution photometer.
c) Illuminance (Lux): illuminance distribution and isoilluminance curve can be measured by distribution photometer. d) Color temperature (k): it can be measured by spectral analysis system. e) Color coordinates: can be measured by spectral analysis system.
f) Front light intensity (CD / m2): it can be measured with color luminance meter BM-7 or light gun cs-100. 3. Structural appearance:
a) Shell structure materials generally include copper, stainless steel, iron, aluminum, plastic, PC or others. b) So far, the types of lamps include pixel lamp, curtain wall lamp, down lamp, buried lamp, underwater lamp, projection lamp, line lamp, decorative lamp, etc. c) Weigh the lamp.
d) The labels of lamps generally include the rated voltage, power, rated temperature of service environment, IP grade, lamp model, manufacturer, etc.
e) Lamp protection grade: according to the requirements of enclosure protection grade (IP code) in gb4208-1993, check whether the lamp structure meets the protection grade required by the design. 4. Reliability test:
a) Temperature rise test: measure the temperature of specific components when the lamp is working at the maximum power consumption under a specific temperature environment. In addition to the components to be tested according to the detection requirements, the driving IC, lamp shell, LED (lamp foot or LED heat sink) and other components are fixed measurement points. Record every 30 minutes until each measuring part is at constant temperature, including power on time, temperature of measuring part and ambient temperature at that time. See attached Table II below for the record sheet. b) Under the normal working conditions of the lamp, the switching power test is to open for 1 minute and close for 30 seconds as a switching cycle, carry out the switching test for 100 times continuously, and record the working conditions of the lamp.
c) The vibration test is to place the lamp on the shaking table and vibrate for 30 minutes to check whether all parts of the lamp are loose and fall off, and whether the lamp can work normally.
d) Luminous maintenance characteristics include luminous flux maintenance characteristics and color maintenance characteristics. Luminous flux maintenance characteristics are the percentage of luminous flux and initial luminous flux at a specific time when the lamp works under specified conditions; The color maintenance characteristic is the difference between the color characteristic and the initial color characteristic of the lamp working for a certain time under the specified working conditions, which can be expressed by the difference of CIE1931 coordinates (x, y). Under normal working conditions, the lamp works continuously for 4 hours and turns off for 15 minutes as a cycle. After repeating the above cycle test for 1000 hours, measure the luminous flux and X and Y values of the lamp at that time, compare them with the initial value of the lamp, and then estimate the service life of the lamp. (the luminous flux and coordinates x and y of the lamp can be measured by the spectral analysis system) e) during the reliability test, the functional items of the lamp shall be inspected according to the lamp operation manual.