GB/T 5169.11-1997 Fire hazard tests for electrical and electronic products - Test methods - Glow-wire tests and guidelines for finished products
Some standard content:
GB/T 5169.11—1997
This standard is equivalent to the International Electrotechnical Commission IEC695-2-1/1 (1994-03, 1st edition) "Fire hazard testing for electric and electronic products Part 2 Test methods Part 1/Chapter 1 Glow-wire test and guidance for finished products", which is a revision of GB5169.4-85. GB5169.4-85 "Fire hazard test for electric and electronic products - Glow-wire test method and guidelines" is replaced by the following standards: GB/T 5169. 10—1997
GB/T 5169.11—1997
Fire hazard test for electric and electronic products
(idt IEC 695-2-1/0:1994)
Fire hazard test for electric and electronic products
(idt IEC 695-2-1/1:1994)
Fire hazard test for electric and electronic products
IEC 695-2-1/2:1994
Glow-wire test for flammability of materials
IEC 695-2-1/3:1994
Fire hazard test for electric and electronic products
Glow-wire test for ignitability of materials
This standard is used together with GB/T5169.10-1997. This standard was first issued in 1985.
This standard replaces GB5169.4-85 from the date of implementation. Appendix A of this standard is a prompt appendix.
This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. Test method Glow-wire test method - General test method Glow-wire test and guidance for finished products Part 2
Part 2
Test method
Part 1/Chapter 2
Test method
This standard is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing for Electric and Electronic Products. This standard was drafted by Guangzhou Electric Science Research Institute. The main drafters of this standard are Yao Daiyue and Liu. Guangzhou Electric Science Research Institute is entrusted with the responsibility of interpreting this standard. 502
Part 1/Chapter 3
GB/T 5169.11—1997
IEC Foreword
1) IEC (International Electrotechnical Commission) is a worldwide standardization organization composed of national electrotechnical committees (IEC National Committees). The IEC mission is to promote international cooperation on various standardization issues in the field of electrical and electronic engineering. To this end, in addition to organizing other activities, it also publishes various international standards and entrusts the formulation of IEC international standards to technical committees. Any IEC National Committee interested in the issue under discussion can participate in this formulation work. International organizations, governmental organizations and non-governmental organizations that have established relations with IEC can also participate in this formulation work. IEC cooperates closely with the International Organization for Standardization (ISO) under the conditions stipulated in the agreement it has reached with it. 2) IEC's formal resolutions or agreements on technical issues are formulated by technical committees represented by national committees that are particularly interested in the issue, and express the international consensus on the issue as accurately as possible. 3) These resolutions or agreements are published in the form of standards, technical reports or guidelines, and are recommended for international use and accepted by the National Committees in this sense.
4) In order to promote international unification, the IEC National Committees undertake to adopt the IEC International Standards as faithfully as possible in their national standards or regional standards. Any inconsistencies between the IEC standards and the corresponding national standards or regional standards should be clearly pointed out in the national standards or regional standards as much as possible.
This International Standard (IEC695-2-1/1) was prepared by IECTC89: Fire Hazard Testing Technical Committee. This International Standard meets the safety basis requirements of IEC104 Guide. This International Standard is based on the following documents. Draft International Standard
89 (Central Office)21
Voting Report
89 (Central Office)29
The full information on the voting for this standard can be found in the voting report indicated in the table above. IEC695-2-1 replaces the 1991 version of IEC695-2-1, Chapter 7 of the 1981 version of IEC707, and Chapter 6 of the 1988 version of IEC829.
IEC695-2-1 consists of the following chapters: IEC695-2-1/0 Fire hazard testing for electric and electronic products Part 2: Test methods Part 1/Chapter 0: Glow-wire test method - General.
IEC695-2-1/1 Fire hazard testing for electric and electronic products Part 2: Test methods Part 1/Chapter 1: Glow-wire test and guidance for finished products.
Fire hazard testing for electric and electronic products Part 2: Test methods Part 1/Chapter 2: Glow-wire test for materials with flammability IEC 695-2-1/2 Ear
Glow-wire test for materials with flammability
Part 2: Test methods Part 1/Chapter 3: Glow-wire test for ignition of materialsIEC 695-2-1/3
Fire hazard testing for electric and electronic products
Glow-wire test for ignition of materials.
Appendix A is for reference only.
1 Scope
National Standard of the People's Republic of China
Fire hazard testing for electric and electronic products
Test methods
Glow-wire end-product test and guidance
Fire hazard testing for electric and electronic productsTest methods
Glow-wire end-product test and guidanceThis standard specifies in detail the fire hazard test when the glow-wire is applied to the finished product. The finished product in this standard refers to electric and electronic equipment and its components and parts. 2 Reference standards
GB/T 5169.11—1997
idt IEC 695-2-1/1:1994
Replaces GB5169.4—85
The provisions contained in the following standards are cited in this standard and constitute the provisions of this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T5169.10—1997 Fire hazard test for electric and electronic products Test methods Glow-wire test method - General (idtIEC695-2-1/0:1994)
3 Description of the test
If possible, the test sample should be a complete device, component or component. The test specimens shall be selected so that the test conditions do not differ significantly from those occurring in normal use, such as shape, ventilation, effects of thermal stress, and the effects of flames or burning particles or hot particles falling near the test specimens.
If the test cannot be carried out on the complete equipment, parts or components, one of the following methods may be used: a) cutting a piece from the part to be checked; b) making a small hole in the complete equipment, parts or components to allow access to the glow wire; c) removing the part to be checked from the complete equipment and testing it separately. The relevant standards shall specify which parts can be removed to allow access to the glow wire. A hole that is too small may affect the test results due to ignition of surrounding objects, reduction in the temperature of the glow wire, or limited oxygen utilization, while a hole that is too large may obtain more oxygen than normal. If any part of the specimen support fixture ignites due to the heat of the glow wire during the test, thereby affecting the thermal conditions of the test specimen, such test shall be invalid.
When conducting the test, it should be ensured that:
--Under certain conditions, after being heated to the temperature specified by the relevant test equipment, the glow wire will not ignite the part, or -Under certain conditions, the glow wire heated by the power supply ignites the part, and its burning duration is limited, and will not be spread by the flame of the test sample or the burning particles or hot particles falling from the test sample. If the test sample emits flames during the application of the glow wire and creates a fire hazard, it is necessary to use other ignition sources for further testing. The State Administration of Technical Supervision approved 504 on December 26, 1997
Implementation on December 1, 1998
These ignition sources are one of the following
GB/T 5169.11-1997
--Use a heating element simulating poor contact instead of the glow wire;--Use a needle flame applied to the part affected by the flame. The glow wire test may not be suitable for small components with a surface linear dimension of less than 20 mm. Other test methods (such as the needle flame test method) can be used for this purpose.
4 Description of the test device
The description of the test device is shown in GB/T5169.10. If the test sample is a part or component of the equipment and can be tested separately, the base layer specified in GB/T5169.10 should be used. In order to assess the possibility of combustion spread, such as the combustion spread caused by burning or glowing particles falling from the test sample, a base layer is placed under the test sample. The base layer is generally composed of the same material or component group as the test sample and the surrounding or bottom of the finished product. The distance between the test sample and the base layer of the surrounding materials or components should be equal to the actual distance of the test sample installed in the electrical and electronic products. If the test sample is a complete independent device, the base layer specified in GB/T5169.10 should be placed in the normal use position and extended by at least 100mm around the base of the equipment. If the test sample is a complete wall-mounted device, it should be fixed at (200±5)mm above the base layer in its normal use position according to GB/T5169.10.
5 Severity level
The temperature of the top of the glow wire and the duration of the glow wire applied to the test sample are specified in the following table. Preferred test temperature
Note: Preferred test duration: t=(30±1)s If required by the relevant standards, other severity levels may also be used. 6 Calibration and verification of temperature measurement system
For calibration and verification of temperature measurement system, see GB/T5169.10. 7 Pretreatment
Unless otherwise specified in the relevant standards, the test samples and the base layer used should be placed in an atmosphere with a temperature of 15℃～35C and a relative humidity of 45%~75% for 24 hours.
8 Initial measurement
The test samples are visually inspected. When specified by the relevant standards, physical and electrical parameters should be measured. 9 Test procedure
For precautions, see GB/T5169.10.
9.1 See 9.1 of GB/T5169.10 and add the following: If the place subjected to thermal stress during normal use of the equipment is not specified in detail, the top of the glow wire shall be applied to the thinnest part of the test sample, 505
and preferably not less than 15 mm from the upper edge of the test sample. 9.2 See 9.2 of GB/T5169.10.
9.3 See 9.3 of GB/T5169.10.
GB/T5169.11—1997
9.4 See 9.4 of GB/T5169.10 and add the following: The contact time between the top of the glow wire and the test sample is (30±1) s. 9.5 Unless otherwise specified in the relevant standards, the test shall be carried out on one test sample. If there is any doubt about the test results, repeat the test on two other test samples.
10 Observation and measurement
During the application of the glow-wire and within 30 seconds thereafter, the test sample, the parts around the test sample and the substrate placed under the test sample shall be observed and the following records shall be made: a) The duration from the application of the top of the glow-wire to the ignition of the test sample or the substrate under it (ti). b) The duration from the application of the top of the glow-wire to the extinction of the flame (t). The flame may be extinguished during or after the application. c) The maximum height of the flame shall be rounded upward in 5mm steps. However, at the beginning of ignition, a high flame may be generated for about 1s, which shall not be counted.
Note: The height of the flame refers to the vertical distance from the upper edge of the glow-wire to the top of the visible flame observed under soft weak light when the glow-wire is applied to the test sample.
d) The degree of penetration of the top of the glow-wire or the deformation of the test component. e) If white pine boards are used, observe their degree of charring. Mechanical and electrical parameters shall be measured if specified by the relevant standards. 11 Evaluation of test results
Unless otherwise specified in the relevant standards, the test sample is considered to have withstood the glow-wire test if it meets one of the following two conditions: a) No flame or no glow;
b) Flame or glow occurs on the test sample, surrounding parts and the underlying substrate, but it extinguishes within 30 seconds after the glow-wire is removed, i.e. t≤ta+30 seconds, while the surrounding parts and the underlying substrate are not completely burned out. When a tightly wrapped silk paper backing is used, the backing should not ignite. 12. The relevant standards that adopt this test method should give provisions a) the required pretreatment (Chapter 7); b) the number of test samples (according to 9.5), c) the test surface and the application point of the glow-wire (according to 9.1); d) the backing used to assess the impact of burning dripping (Chapter 4); e) severity level (Chapter 5):
-test temperature,
application duration (ta);
f) whether more than one point is tested on the same test sample. If more than one point is tested, it must be carefully ensured that the degradation caused by the previous test will affect the results of the subsequent tests (according to 9.1); g) whether the specified standards meet the safety requirements, or whether other standards are to be specified, such as t, t. and flame height (Chapter 10); h) the degree of degradation of mechanical and electrical properties allowed (Chapter 10). 506
GB/T 5169.11-1997
Appendix A
(Indicative Appendix)
Guidelines for glow-wire test
The appropriate test temperature should be selected based on the estimated risk of failure and its consequences caused by the test specimen's inability to adapt to abnormal heat, ignition and spread of combustion.
In order to help the drafters of relevant standards to reasonably select the glow-wire test temperature according to the provisions in the table of Chapter 5, the following suggestions are made: Insulating material parts
550℃
650℃
750℃
850℃
960℃
Parts in contact with current-carrying parts or keeping them in place
Enclosures and covers that do not keep current-carrying parts in place
Ensure that the parts with fire hazard have the lowest level of ignition and/or flame spread, and the parts are in this No other tests are performed on this aspect (the purpose is to eliminate materials that burn violently) Equipment attended when in use
Fixed accessories on equipment
Equipment attended when in use but used under more severe conditionsFixed accessories on equipment
Equipment unattended when in use but used under less severe conditions Equipment unattended under continuous load
Equipment intended to be used near the central power supply point in a building Equipment unattended when in use, continuously loaded and used under more severe conditions Equipment intended to be used near the central power supply point in a building Note: This test may not be suitable for small components with a surface linear dimension of less than 20 mm. For this purpose, other test methods (such as the needle flame test method) may be used as reference. This test may also not be suitable for small insulating material parts. If they do not have a significant impact on the fire hazard, they usually do not need to be tested.11—1997
9.4 See 9.4 in GB/T5169.10 and add the following: Keep the top of the glow wire in contact with the test sample for (30±1)s. 9.5 Unless otherwise specified in the relevant standards, the test should be carried out on one test sample. If there is any doubt about the test result, repeat the test on two other test samples.
10 Observation and measurement
During the application of the glow wire and within 30s thereafter, the test sample, the parts around the test sample and the base layer placed under the test sample should be observed and the following records should be made: a) The duration from the application of the top of the glow wire to the ignition of the test sample or the base layer under it (ti). b) The duration from the application of the top of the glow wire to the extinction of the flame (t). The flame may be extinguished during or after the application. c) The maximum height of the flame should be rounded upward in 5mm steps. However, at the beginning of ignition, a high flame may be generated for about 1s, which is not counted.
Note: The height of the flame refers to the vertical distance from the upper edge of the glow wire to the top of the flame visible under soft weak light when the glow wire is applied to the test sample.
d) The degree of penetration of the top of the glow wire or the deformation of the test component. e) If white pine wood is used, observe its degree of charring. Mechanical and electrical parameters should be measured if the relevant standards specify. 11 Evaluation of test results
Unless otherwise specified in the relevant standards, the test sample is considered to have withstood the glow wire test if it meets one of the following two conditions. a) No flame or no heat;
b) The test sample, surrounding parts and the underlying substrate produce flames or heat, but it goes out within 30 seconds after the glow wire is removed, that is, t≤ta+30 seconds, and the surrounding parts and the underlying substrate are not completely burned. When a tightly wrapped silk paper backing is used, the backing should not ignite. 12. The relevant standards that adopt this test method should give provisions a) the required pretreatment (Chapter 7); b) the number of test samples (according to 9.5), c) the test surface and the application point of the glow-wire (according to 9.1); d) the backing used to assess the impact of burning dripping (Chapter 4); e) severity level (Chapter 5):
-test temperature,
application duration (ta);
f) whether more than one point is tested on the same test sample. If more than one point is tested, it must be carefully ensured that the degradation caused by the previous test will affect the results of the subsequent tests (according to 9.1); g) whether the specified standards meet the safety requirements, or whether other standards are to be specified, such as t, t. and flame height (Chapter 10); h) the degree of degradation of mechanical and electrical properties allowed (Chapter 10). 506
GB/T 5169.11-1997
Appendix A
(Indicative Appendix)
Guidelines for glow-wire test
The appropriate test temperature should be selected based on the estimated risk of failure and its consequences caused by the test specimen's inability to adapt to abnormal heat, ignition and spread of combustion.
In order to help the drafters of relevant standards to reasonably select the glow-wire test temperature according to the provisions in the table of Chapter 5, the following suggestions are made: Insulating material parts
550℃
650℃
750℃
850℃
960℃
Parts in contact with current-carrying parts or keeping them in place
Enclosures and covers that do not keep current-carrying parts in place
Ensure that the parts with fire hazard have the lowest level of ignition and/or flame spread, and the parts are in this No other tests are performed on this aspect (the purpose is to eliminate materials that burn violently) Equipment attended when in use
Fixed accessories on equipment
Equipment attended when in use but used under more severe conditionsFixed accessories on equipment
Equipment unattended when in use but used under less severe conditions Equipment unattended under continuous load
Equipment intended to be used near the central power supply point in a building Equipment unattended when in use, continuously loaded and used under more severe conditions Equipment intended to be used near the central power supply point in a building Note: This test may not be suitable for small components with a surface linear dimension of less than 20 mm. For this purpose, other test methods (such as the needle flame test method) may be used as reference. This test may also not be suitable for small insulating material parts. If they do not have a significant impact on the fire hazard, they usually do not need to be tested.11—1997bzxz.net
9.4 See 9.4 in GB/T5169.10 and add the following: Keep the top of the glow wire in contact with the test sample for (30±1)s. 9.5 Unless otherwise specified in the relevant standards, the test should be carried out on one test sample. If there is any doubt about the test result, repeat the test on two other test samples.
10 Observation and measurement
During the application of the glow wire and within 30s thereafter, the test sample, the parts around the test sample and the base layer placed under the test sample should be observed and the following records should be made: a) The duration from the application of the top of the glow wire to the ignition of the test sample or the base layer under it (ti). b) The duration from the application of the top of the glow wire to the extinction of the flame (t). The flame may be extinguished during or after the application. c) The maximum height of the flame should be rounded upward in 5mm steps. However, at the beginning of ignition, a high flame may be generated for about 1s, which is not counted.
Note: The height of the flame refers to the vertical distance from the upper edge of the glow wire to the top of the flame visible under soft weak light when the glow wire is applied to the test sample.
d) The degree of penetration of the top of the glow wire or the deformation of the test component. e) If white pine wood is used, observe its degree of charring. Mechanical and electrical parameters should be measured if the relevant standards specify. 11 Evaluation of test results
Unless otherwise specified in the relevant standards, the test sample is considered to have withstood the glow wire test if it meets one of the following two conditions. a) No flame or no heat;
b) The test sample, surrounding parts and the underlying substrate produce flames or heat, but it goes out within 30 seconds after the glow wire is removed, that is, t≤ta+30 seconds, and the surrounding parts and the underlying substrate are not completely burned. When a tightly wrapped silk paper backing is used, the backing should not ignite. 12. The relevant standards that adopt this test method should give provisions a) the required pretreatment (Chapter 7); b) the number of test samples (according to 9.5), c) the test surface and the application point of the glow-wire (according to 9.1); d) the backing used to assess the impact of burning dripping (Chapter 4); e) severity level (Chapter 5):
-test temperature,
application duration (ta);
f) whether more than one point is tested on the same test sample. If more than one point is tested, it must be carefully ensured that the degradation caused by the previous test will affect the results of the subsequent tests (according to 9.1); g) whether the specified standards meet the safety requirements, or whether other standards are to be specified, such as t, t. and flame height (Chapter 10); h) the degree of degradation of mechanical and electrical properties allowed (Chapter 10). 506
GB/T 5169.11-1997
Appendix A
(Indicative Appendix)
Guidelines for glow-wire test
The appropriate test temperature should be selected based on the estimated risk of failure and its consequences caused by the test specimen's inability to adapt to abnormal heat, ignition and spread of combustion.
In order to help the drafters of relevant standards to reasonably select the glow-wire test temperature according to the provisions in the table of Chapter 5, the following suggestions are made: Insulating material parts
550℃
650℃
750℃
850℃
960℃
Parts in contact with current-carrying parts or keeping them in place
Enclosures and covers that do not keep current-carrying parts in place
Ensure that the parts with fire hazard have the lowest level of ignition and/or flame spread, and the parts are in this No other tests are performed on this aspect (the purpose is to eliminate materials that burn violently) Equipment attended when in use
Fixed accessories on equipment
Equipment attended when in use but used under more severe conditionsFixed accessories on equipment
Equipment unattended when in use but used under less severe conditions Equipment unattended under continuous load
Equipment intended to be used near the central power supply point in a building Equipment unattended when in use, continuously loaded and used under more severe conditions Equipment intended to be used near the central power supply point in a building Note: This test may not be suitable for small components with a surface linear dimension of less than 20 mm. For this purpose, other test methods (such as the needle flame test method) may be used as reference. This test may also not be suitable for small insulating material parts. If they do not have a significant impact on the fire hazard, they usually do not need to be tested.11-1997
Appendix A
(Indicative Appendix)
Guidelines for Glow-Wire Test
The appropriate test temperature should be selected based on the estimated risk of failure and its consequences caused by the test sample's inability to adapt to abnormal heat, ignition and spread of flame.
In order to help the drafters of relevant standards to reasonably select the glow-wire test temperature in accordance with the provisions of the table in Chapter 5, the following suggestions are made: Insulating material parts
550℃
650℃
750℃
850℃
960℃
Parts in contact with current-carrying parts or holding them in place
Enclosures and covers that do not hold current-carrying parts in place
Ensure that the parts with fire hazard have the lowest level of ignition and/or spread of flame, and the parts are in this No other tests are performed on this aspect (the purpose is to eliminate materials that burn violently) Equipment attended when in use
Fixed accessories on equipment
Equipment attended when in use but used under more severe conditionsFixed accessories on equipment
Equipment unattended when in use but used under less severe conditions Equipment unattended under continuous load
Equipment intended to be used near the central power supply point in a building Equipment unattended when in use, continuously loaded and used under more severe conditions Equipment intended to be used near the central power supply point in a building Note: This test may not be suitable for small components with a surface linear dimension of less than 20 mm. For this purpose, other test methods (such as the needle flame test method) may be used as reference. This test may also not be suitable for small insulating material parts. If they do not have a significant impact on the fire hazard, they usually do not need to be tested.11-1997
Appendix A
(Indicative Appendix)
Guidelines for Glow-Wire Test
The appropriate test temperature should be selected based on the estimated risk of failure and its consequences caused by the test sample's inability to adapt to abnormal heat, ignition and spread of flame.
In order to help the drafters of relevant standards to reasonably select the glow-wire test temperature in accordance with the provisions of the table in Chapter 5, the following suggestions are made: Insulating material parts
550℃
650℃
750℃
850℃
960℃
Parts in contact with current-carrying parts or holding them in place
Enclosures and covers that do not hold current-carrying parts in place
Ensure that the parts with fire hazard have the lowest level of ignition and/or spread of flame, and the parts are in this No other tests are performed on this aspect (the purpose is to eliminate materials that burn violently) Equipment attended when in use
Fixed accessories on equipment
Equipment attended when in use but used under more severe conditionsFixed accessories on equipment
Equipment unattended when in use but used under less severe conditions Equipment unattended under continuous load
Equipment intended to be used near the central power supply point in a building Equipment unattended when in use, continuously loaded and used under more severe conditions Equipment intended to be used near the central power supply point in a building Note: This test may not be suitable for small components with a surface linear dimension of less than 20 mm. For this purpose, other test methods (such as the needle flame test method) may be used as reference. This test may also not be suitable for small insulating material parts. If they do not have a significant impact on the fire hazard, they usually do not need to be tested.
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