General safety requirements for LED luminaire products
The general safety requirements for LED luminaire products mean that LED luminaires should be designed and manufactured so that they can work safely during normal use without harm to people or the surrounding environment.
For the safety of manufactured products, items must be 100% checked when shipped from the factory:
1. Identification / rated voltage, frequency, power, color temperature, etc.;
2. Lighting test / functional test;
3. Pressure resistance (absolute green strength) test;
4. Continuous grounding test.
Anti-shock protection is divided into:
Class 0 lamps: relying on basic insulation as a lamp for protection against electric shock, such countries are strictly prohibited from producing and selling;
Class I luminaires: The protection against electric shock of luminaires not only relies on basic insulation, but also includes additional safety measures, that is, accessible conductive parts are connected to the protective grounding conductors in the fixed wiring of the installation, making accessible conductive parts in case The basic insulation fails to be charged when it fails;
Class II luminaires: The protection against electric shock of luminaires not only relies on basic insulation, but also has additional safety measures such as double insulation or reinforced green, no protective earthing or measures dependent on installation conditions;
Class III luminaires: Protection against electric shock relies on a supply voltage that is safely low voltage and does not produce luminaires above the very low (SELV) voltage.
Many small factories have no safety awareness, and LED lamps can be lit. Many engineers say that LED lamps and lanterns can damage LED lamp beads when they are under pressure. This understanding is wrong and very unsafe.
As a merchant, we must strictly control the quality of our products and meet the safety standards.
What kind of pressure should be applied to the pressure during the production process?
Class I lamps are 2U+1000V/1 minute
LED lamp protection grounding continuity and protection against electric shock
1. Continuity of protective grounding of LED lamps (second and third types of lamps are not applicable)
The protective earthing terminal on the LED luminaire is between the most accessible parts that may become charged; the key to the protective grounding is the continuity of the grounding and the reliability of the grounding, so that the detected protective earthing continuity resistance is ≤0.5 ohms.
Then first determine which parts are to be protected from grounding, then solve the continuity between the parts that need protective grounding and the terminals.
1. It can be touched when the lamp is installed, and it can become a charged part when the insulation fails.
2. It is accessible when the luminaire is clean and can be turned into a live part when it fails.
3. The metal mounting surface where the safety components in the luminaire are located,
4. Metal surfaces that come into contact with or may come into contact with safety components (such as wires, controls) in the luminaire,
5. More importantly, we must ensure the continuity between them from the structure.
6. Conductors marked with yellow-green two-color lines, whether internal or external, should be connected only to the grounding terminal.
7. Use self-tapping screws to protect the continuity of the ground, as long as it does not interfere with the connection during normal use, and use at least two screws for each joint.
8. Aluminum and copper can not be directly connected to the ground, which will cause the contact resistance to increase due to electrochemical reaction, which affects the continuous low resistance of the ground.
9. Grounding resistance measurement, can be adjusted to 12V, 10A detection, resistance value ≤ 0.5 ohm,