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Analysis of quality problems in led lamp detection

2019-11-23

OFweek

In addition to clothing, food and shelter in life, LED lighting is also a common and widely used item. With the advancement of society, people have become more dependent on the application of artificial light. Commonly, there are household LED energy-saving lamps, LED plant growth lamps, etc. Today Let's talk about the quality inspection of LED energy-saving lamps.

The LED lamp is composed of an LED module, a lamp holder, a built-in drive, a heat sink and a lamp cover. The solid lamp needs to be tested and evaluated from the aspects of safety performance and electromagnetic compatibility (EMC) of the LED lamp. Huatongwei is the authoritative lighting inspection agency. The following describes the safety performance detection module of LED lights.

LED light security module:

The common self-ballasted LED lamp refers to a lighting device that complies with IEC 60061-1 and contains LED light source and components necessary for maintaining stable ignition point. Such lamps are generally suitable for use in homes and the like for illumination purposes and are not removable without damaging their structure. Its power needs to be kept below 60 W; the voltage should be kept above 50 V and less than or equal to 250 V; the lamp head must comply with IEC 60061-1.

Self-ballasted LED lights need to comply with the national mandatory standard GB 24906-2010 "Safety requirements for self-ballasted LED lights above 50 V for general lighting", marking, interchangeability, protection against electric shock, mechanical strength, insulation resistance and electrical strength Wait for multiple parameters.

1.Detection of safety signs:365betThe sign should indicate the source of the mark, the voltage range of the product, the rated power, etc. The mark needs to be clearly and durable displayed on the product.

2.Product interchange detection:When there is a faulty lamp such as LED, we need to replace it. In order to ensure that the product can be used with the original base, the lamp should adopt the lamp head specified in IEC 60061-1 and the gauge according to IEC 60061-3.

3.Live parts protection:365betThe structural design of the lamp shall ensure that, in the case of an auxiliary casing without the shape of the lamp, when the lamp is installed in a lamp holder conforming to the lamp holder data sheet, the metal parts in the lamp body or in the lamp body cannot be touched, and the externally insulated external metal Parts and live metal parts.

4.Insulation resistance and electrical strength after moisture treatment:Insulation resistance and electrical strength are the basic indicators of LED lamp material and internal insulation. The standard requirements are that the insulation resistance between the current-carrying metal parts of the lamp cap and the accessible parts of the lamp should be no less than 4 MΩ and electrical (HV type lamp cap: 4 000 V; BV type lamp holder: 2U + 1 000 V) Flashover or breakdown is not allowed in the test.

5.Product strength testing:The firmness of riveting between the LED lamp head and the lamp body. According to the standard requirements: the lamp cap should be firmly connected to the lamp body or to the part of the lamp that is used to screw in or out. For a lamp holder that is not fixed by bonding, relative movement between the lamp cap and the lamp cap is allowed, but should not exceed 10°.

LED safety inspection module such as LED:

1.harmonic:IEC 61000-3-2 specifies the harmonic current emission limits and specific measurement methods for lighting equipment. Harmonics refers to the amount of electricity contained in a current that is an integer multiple of the fundamental. In the circuit of the lighting device, since the sinusoidal voltage flows through the non-linear load, a non-sinusoidal current is generated, and the non-sinusoidal current generates a voltage drop across the grid impedance, so that the grid voltage waveform also forms a non-sinusoidal waveform, thereby polluting the grid. Excessive harmonic content can cause additional losses and heat, increase reactive power, reduce power factor, and even damage equipment, endangering safety.

2.Disturbance voltage:GB 17743-2007 "Limitations and Measurement Methods for Radio Disturbance Characteristics of Electrical Lighting and Similar Equipment" gives the limits of the disturbance voltage and the specific measurement method. When the disturbance voltage of the self-ballasted LED lamp exceeds the limit, it will affect The normal operation of the surrounding electrical and electronic equipment.

For people, LED lighting products are just the items of life, and their dependence on them is getting higher and higher. With the development of LED lighting, the production technology of LED is also constantly improving. New application environments and methods will also generate new LED testing standards. To ensure the safety of society and people, the testing standards will be continuously refined and rigorous. This requires third-party testing organizations to continuously improve their testing capabilities, and also allows manufacturers to understand that only by producing sophisticated LED lighting products can they maintain their competitive strength and have a place in the market environment.

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