COMPANY
News
HOME > COMPANY > News
Common problems in 3C certification of LED lamps
Date：2020/11/5 Clicks：1352
1. The light source emits light and the lamps are out
The light used for lighting is emitted by the light source. The luminaire is an appliance that optimizes the divergence of the light and guarantees the safety of the light source. Therefore, the safety standard of the luminaire does not involve the requirements for the light source itself;
2. The naming of lamps and lanterns is separated from the light source to serve the lighting
Lamps and lanterns use the light emitted by the light source to provide lighting services. Therefore, the classification and naming of the lamp standard should not be related to the light source, but should directly reflect its service capabilities, objects and places.
After fully understanding the two principles, it is not difficult to find that the existing national standards for lamps are all applicable to LED lamps, but some of the known characteristics of LED lamps are not yet concretely reflected in the existing standards, and it is necessary to further focus on the characteristics of LED lamps. Formulate special performance and energy efficiency standards for LED lamps. LED lamps can be classified into six categories of lamps: recessed lamps, fixed general lamps, portable general lamps, aquarium lamps, night lamps installed in power sockets, and ground recessed lamps, and apply for CCC certification.
1 How to divide the certification unit?
① Installation method;
②Type of light source;
③Class of protection against electric shock;
④ Shell protection level;
⑤The installation surface material and heat insulation material cover;
⑥ Light control device;
The above 6 points are the same and those with similar structure can be divided into the same unit.
2 What are the forms of protection against electric shock?
Class I-basic insulation + protective grounding;
Class Ⅱ-double insulation / reinforced insulation;
Class III-power supply voltage SELV + lamp working voltage SELV.
3 What positioning and protective measures should be taken for the power terminal?
Generally, an insulating gasket is placed under the terminal and fixed with double screws. The purpose is to prevent a strand of free conductor that may come out of the stranded conductor after wiring does not contact metal parts (for power conductors) or live parts (for grounding conductors) .
4 What are the restrictions on the use of self-tapping screws?
Unless there are appropriate locking devices (such as spring washers), self-tapping screws cannot be used to connect current-carrying components; unless there are at least two at each connection, self-tapping screws cannot be used to provide grounding continuity.
5 How to judge which parts of the glass or translucent cover need to be punched according to the requirements of fragile parts?
After removing these components, determine whether the IP protection level of the lamp is reduced, whether the protection against electric shock is still up to standard, and whether the protection against the hazards of ultraviolet rays and light source sputtering is still up to standard. If there is any negative judgment, it should be regarded as a fragile part and subjected to an impact test.
6 What are the mechanical requirements for live flexible cables used to hang lamps?
A flexible cable with a sufficiently large conductor cross-sectional area should be selected so that the conductor's force during suspension is not more than 15N/mm2.
7 What are the requirements for lights marked with symbols or symbols?
①Requirement for installation surface temperature:
The installation surface temperature measured in the normal working heat test and the abnormal working heat test shall not exceed 90+5℃ and 130+5℃ respectively;
②Type requirements of light control device:
There are no further requirements for transformers and electronic lamp control devices that comply with IEC61558-2-4/IEC61558-2-6/IEC60989;
③Requirements for distance from installation surface:
At least 10mm (the lamp housing is continuous in the projection surface of the lamp control device, the lamp control device is at least 3mm from the inner surface of the lamp housing, and the outer surface of the lamp housing is at least 3mm from the mounting surface); or at least 35mm (the lamp housing is not within the projection surface of the lamp control device) Continuous, the light control device has direct access to the mounting surface);
④Requirements for the type of thermal protector:
For thermal protectors with marked symbols and symbols (...not greater than 130), no further requirements; for thermal protectors with marked symbols (...greater than 130) and without thermal protectors, they shall further meet the thermal test of the lamp control device failure condition Requirements.
8 Under what circumstances need to be equipped with a flexible cord holder?
The luminaire is provided or designed to use a non-detachable flexible cable or cord (power cord or cord, interconnection cable), and it extends beyond 80mm from the luminaire, it needs to be equipped with a cord holder.
9 Are there special requirements for the plugs of Class III lamps?
Class III lamps cannot use plugs that comply with GB1002/GB1003.
10 How to complete the loop installation of lamps?
The loop installation of the luminaire can only be done through the appliance coupler or terminal block.
11 Can SELV components be uninsulated?
can. However, if the insulation is used, it must meet the relevant requirements for insulation resistance and electrical strength.
12 Which parts of Class I lamps must be grounded?
There is only basic insulation between live parts and metal parts that can be touched (when the installation is completed, when the light source or starter is opened for replacement) or easily contact with the supporting surface.
13 How should the samples be pretreated before insulation resistance and electrical strength?
The sample should be placed in a humid box for 48 hours, the humidity in the box should be kept at 91%-95%, and the temperature should be any suitable value between 20-30℃.
14 LED modules and LED drivers are connected between the live parts of different models of LED lamps, which are functionally required to be turned on. Is there no need to conduct insulation resistance and electrical strength tests?
Insulation resistance and electrical strength tests are also required between live parts of different polarities of LED lamps. The functional parts between live parts of different polarities should be removed during the test so that the test voltage is applied to the insulation of the parts.
15 Are there requirements for creepage distance and electrical clearance between SELV components?
Only when the working voltage is below 25V, there is no requirement for creepage distance and electrical clearance. It should be noted that for slots less than 1mm, only the width of the slot is calculated for the creepage distance; for gaps less than 1mm, it is ignored when calculating the electrical clearance.
16 What are the special requirements for the durability test of LED lamps?
Regardless of whether there is an abnormal working state, the durability test of the LED lamps is uniformly used 1.10Un for 240h (normal working 10×24h).
17 What are the special requirements for the thermal test of LED lamps?
The normal working heat test adopts 1.06Un (when measuring the temperature of the component with tc value, 1.00Un is used). If the connection between the LED module and the LED driver is soldering or non-detachable terminal, there is no need to perform abnormal working heat test, otherwise 1.10Un is used. Abnormal working heat test.
18 What are the requirements for the flat temperature of portable lamps?
The portable luminaire should not fall when tilted at 6°; if it is tilted at 15°, the luminaire should be placed in the dumped position during abnormal working heat test.
19 What are the special requirements for the thermal test of the night light installed in the power socket?
In addition to the possible abnormal working conditions listed in GB7000.1, the new abnormal working conditions of covering the night light with a cover are added. The lamp should work continuously for 7h under 1.00Un or until it is damaged.
20 What are the special requirements for the IP protection level of embedded lamps on the ground?
①IP65+ drainage device;
②IP65+IP67; including at least one of the above schemes, there can be more IP grades, such as IP65+IP67+IP68.
The light used for lighting is emitted by the light source. The luminaire is an appliance that optimizes the divergence of the light and guarantees the safety of the light source. Therefore, the safety standard of the luminaire does not involve the requirements for the light source itself;
2. The naming of lamps and lanterns is separated from the light source to serve the lighting
Lamps and lanterns use the light emitted by the light source to provide lighting services. Therefore, the classification and naming of the lamp standard should not be related to the light source, but should directly reflect its service capabilities, objects and places.
After fully understanding the two principles, it is not difficult to find that the existing national standards for lamps are all applicable to LED lamps, but some of the known characteristics of LED lamps are not yet concretely reflected in the existing standards, and it is necessary to further focus on the characteristics of LED lamps. Formulate special performance and energy efficiency standards for LED lamps. LED lamps can be classified into six categories of lamps: recessed lamps, fixed general lamps, portable general lamps, aquarium lamps, night lamps installed in power sockets, and ground recessed lamps, and apply for CCC certification.
1 How to divide the certification unit?
① Installation method;
②Type of light source;
③Class of protection against electric shock;
④ Shell protection level;
⑤The installation surface material and heat insulation material cover;
⑥ Light control device;
The above 6 points are the same and those with similar structure can be divided into the same unit.
2 What are the forms of protection against electric shock?
Class I-basic insulation + protective grounding;
Class Ⅱ-double insulation / reinforced insulation;
Class III-power supply voltage SELV + lamp working voltage SELV.
3 What positioning and protective measures should be taken for the power terminal?
Generally, an insulating gasket is placed under the terminal and fixed with double screws. The purpose is to prevent a strand of free conductor that may come out of the stranded conductor after wiring does not contact metal parts (for power conductors) or live parts (for grounding conductors) .
4 What are the restrictions on the use of self-tapping screws?
Unless there are appropriate locking devices (such as spring washers), self-tapping screws cannot be used to connect current-carrying components; unless there are at least two at each connection, self-tapping screws cannot be used to provide grounding continuity.
5 How to judge which parts of the glass or translucent cover need to be punched according to the requirements of fragile parts?
After removing these components, determine whether the IP protection level of the lamp is reduced, whether the protection against electric shock is still up to standard, and whether the protection against the hazards of ultraviolet rays and light source sputtering is still up to standard. If there is any negative judgment, it should be regarded as a fragile part and subjected to an impact test.
6 What are the mechanical requirements for live flexible cables used to hang lamps?
A flexible cable with a sufficiently large conductor cross-sectional area should be selected so that the conductor's force during suspension is not more than 15N/mm2.
7 What are the requirements for lights marked with symbols or symbols?
①Requirement for installation surface temperature:
The installation surface temperature measured in the normal working heat test and the abnormal working heat test shall not exceed 90+5℃ and 130+5℃ respectively;
②Type requirements of light control device:
There are no further requirements for transformers and electronic lamp control devices that comply with IEC61558-2-4/IEC61558-2-6/IEC60989;
③Requirements for distance from installation surface:
At least 10mm (the lamp housing is continuous in the projection surface of the lamp control device, the lamp control device is at least 3mm from the inner surface of the lamp housing, and the outer surface of the lamp housing is at least 3mm from the mounting surface); or at least 35mm (the lamp housing is not within the projection surface of the lamp control device) Continuous, the light control device has direct access to the mounting surface);
④Requirements for the type of thermal protector:
For thermal protectors with marked symbols and symbols (...not greater than 130), no further requirements; for thermal protectors with marked symbols (...greater than 130) and without thermal protectors, they shall further meet the thermal test of the lamp control device failure condition Requirements.
8 Under what circumstances need to be equipped with a flexible cord holder?
The luminaire is provided or designed to use a non-detachable flexible cable or cord (power cord or cord, interconnection cable), and it extends beyond 80mm from the luminaire, it needs to be equipped with a cord holder.
9 Are there special requirements for the plugs of Class III lamps?
Class III lamps cannot use plugs that comply with GB1002/GB1003.
10 How to complete the loop installation of lamps?
The loop installation of the luminaire can only be done through the appliance coupler or terminal block.
11 Can SELV components be uninsulated?
can. However, if the insulation is used, it must meet the relevant requirements for insulation resistance and electrical strength.
12 Which parts of Class I lamps must be grounded?
There is only basic insulation between live parts and metal parts that can be touched (when the installation is completed, when the light source or starter is opened for replacement) or easily contact with the supporting surface.
13 How should the samples be pretreated before insulation resistance and electrical strength?
The sample should be placed in a humid box for 48 hours, the humidity in the box should be kept at 91%-95%, and the temperature should be any suitable value between 20-30℃.
14 LED modules and LED drivers are connected between the live parts of different models of LED lamps, which are functionally required to be turned on. Is there no need to conduct insulation resistance and electrical strength tests?
Insulation resistance and electrical strength tests are also required between live parts of different polarities of LED lamps. The functional parts between live parts of different polarities should be removed during the test so that the test voltage is applied to the insulation of the parts.
15 Are there requirements for creepage distance and electrical clearance between SELV components?
Only when the working voltage is below 25V, there is no requirement for creepage distance and electrical clearance. It should be noted that for slots less than 1mm, only the width of the slot is calculated for the creepage distance; for gaps less than 1mm, it is ignored when calculating the electrical clearance.
16 What are the special requirements for the durability test of LED lamps?
Regardless of whether there is an abnormal working state, the durability test of the LED lamps is uniformly used 1.10Un for 240h (normal working 10×24h).
17 What are the special requirements for the thermal test of LED lamps?
The normal working heat test adopts 1.06Un (when measuring the temperature of the component with tc value, 1.00Un is used). If the connection between the LED module and the LED driver is soldering or non-detachable terminal, there is no need to perform abnormal working heat test, otherwise 1.10Un is used. Abnormal working heat test.
18 What are the requirements for the flat temperature of portable lamps?
The portable luminaire should not fall when tilted at 6°; if it is tilted at 15°, the luminaire should be placed in the dumped position during abnormal working heat test.
19 What are the special requirements for the thermal test of the night light installed in the power socket?
In addition to the possible abnormal working conditions listed in GB7000.1, the new abnormal working conditions of covering the night light with a cover are added. The lamp should work continuously for 7h under 1.00Un or until it is damaged.
20 What are the special requirements for the IP protection level of embedded lamps on the ground?
①IP65+ drainage device;
②IP65+IP67; including at least one of the above schemes, there can be more IP grades, such as IP65+IP67+IP68.
Add.：Room703、705/7F, Development Building, Tian An Hi-Teck Ecological Park, No.555 North Road Panyu Avenue, Panyu District, Guangzhou City, 511400, China
Tel.：020-39211670 Fax：020-39211640 E-mail:info@certitek.cn