GB 23757: Evolution and historical versions
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(Protection requirements for fire electronic products)
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| GB 23757-2009 | English | 279 |
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Protection requirements for fire electronic products
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Basic data | Standard ID | GB 23757-2025 (GB23757-2025) | | Description (Translated English) | (Protection requirements for fire electronic products) | | Sector / Industry | National Standard | | Date of Implementation | 2026-11-01 | | Older Standard (superseded by this standard) | GB 23757-2009 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB 23757-2009: Protection requirements for fire electronic products---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Protection requirements for fire electronic products
ICS 13.220.20
C81
National Standards of People's Republic of China
Fire protection requirements for electronic products
Posted 2009-05-05
2010-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
Chapter 3 of this standard are mandatory, the rest are recommended.
Appendix A of this standard is a normative appendix.
The standard proposed by the People's Republic of China Ministry of Public Security.
This standard by the National Standardization Technical Committee of the Sixth Fire Technical Committee (SAC/TC113/SC6) centralized.
This standard is drafted by. Ministry of Public Security Shenyang Fire Research Institute.
The main drafters of this standard. SUN Shuang Guo Li governance, Tang Hao, Xie Feng, Wang Yane, Yang Ying, Shao Yu.
Fire protection requirements for electronic products
1 Scope
This standard specifies the requirements and test methods for fire protection of electronic products.
This standard applies to general industrial installation fire electronic products used in place and civil buildings. Installed in other environments with special
Performance of fire electronic products, special requirements can be specified by the relevant standards, it is also applicable to this standard.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 2423.37-2006 Environmental testing for electric and electronic products Part 2. Test methods - Test L. Dust Test
(IEC 60068-2-68.1994, IDT)
GB 4208 housing protection (IP Code) (GB 4208-2008, IEC 60529.2001, IDT)
GB/T 5169.5-1997 Fire hazard testing for electric and electronic products - Part 2. Test methods - Section 2. Needle-flame test
(Idt IEC 60695-2-2.1991)
GB/T 5169.10-2006 Fire hazard testing for electric and electronic products - Part 10. Glowing/hot wire based test methods for burning
Hot wire apparatus and common test procedure (IEC 60695-2-10.2000, IDT)
GB 16838-2005 Fire Electronic Product Environmental test methods and severities
GB 17945 fire emergency lighting (GB 17945-2000, neq ISO 6309. 1987)
GB 20286-2006 public places burning flame retardant products and components performance requirements and labeling
3 Requirements
3.1 General
Fire electronic products to comply with this standard, should first meet the requirements of this section, the provisions of Chapter 4, then press the test, and meet the test of
Claim.
3.2 Technical Requirements
3.2.1 shell
3.2.1.1 Fire electronic products shell should use non-combustible or flame-retardant materials, fire resistant properties of the material should meet the GB 20286-2006
Claim.
3.2.1.2 When the open fire electronic products shell and remove the other protective measures, installation and maintenance according to the manufacturer's specifications, needs
All parts should be easy to close proximity.
3.2.1.3 Fire electronics enclosure class should be specified in the product logo or instructions for use. Shell protection grade should meet
GB 4208 requirements for indoor use controller class fire electronic products shell protection grade not less than a predetermined IP30 GB 4208 etc.
level.
3.2.1.4 fire electronic products for outdoor use should be waterproof and dustproof function.
3.2.1.5 ground installation of fire electronic products should be waterproof and wear-resistant features.
3.2.1.6 ground installation of fire emergency lighting surface of the panel should have impact resistance.
3.2.2 Materials
3.2.2.1 insulating material for fixing the current-carrying parts used should meet GB/T 5169.10-2006 predetermined temperature glow wire top
The glow wire flammability test requirements of 850 ℃, and other insulating material should meet GB/T 5169.10-2006 predetermined temperature glow wire top
Degree glow wire flammability test requirements of 650 ℃.
3.2.2.2 terminal blocks, the surface size of not more than 14mm × 14mm insulation member shall meet the provisions of 4.7 needle flame test
Claim.
3.2.2.3 main circuit wiring should be temperature parameter is greater than 105 ℃ flame retardant wire (or cable); flame retardant trunking connection should be full
Foot GB appliance housings, electrical accessories and pipelines retardant two requirements stipulated 20286-2006.
3.2.3 Terminals
3.2.3.1 Structure terminals should ensure good electrical contact and expected current-carrying capacity, all its contact member and the carrier member shall
Conductive metal, and it should have sufficient mechanical strength.
3.2.3.2 Terminals shall be marked clearly, durable, appropriate use shall be stated in the relevant documents.
3.2.4 Protective ground
3.2.4.1 When fire electronic products such as the exposed conductive parts pose a danger, should be electrically connected to the protective earth terminals.
3.2.4.2 Protective grounding terminal should be set in place to facilitate easy access to the wiring, and embalmed.
3.2.4.3 Protective grounding terminal shall be marked clearly, and the use of color flag or application of graphical symbols for identification.
4 Test
4.1 General
4.1.1 Test atmospheric conditions
In addition to the relevant provisions otherwise noted, the tests shall be carried out under the following atmospheric conditions.
--- Temperature. 15 ℃ ~ 35 ℃;
--- Humidity. 25% RH ~ 75% RH;
--- Atmospheric pressure. 86kPa ~ 106kPa.
4.1.2 Tolerance
In addition to the relevant provisions otherwise indicated, are the tolerance test data ± 5%.
4.1.3 Test Samples
Unless otherwise specified, the test sample (hereinafter referred to as the sample) should be clean products, and the way all the parts should be specified by the manufacturer
installation.
4.1.4 Check before test
4.1.4.1 samples before testing should be visually inspected, and meet the following requirements.
a) No surface corrosion, coating loss and blistering, no scratches, cracks, burrs and other mechanical damage;
b) no loosening the fastening portion;
c) clearly marked and durable.
4.1.4.2 Test samples can be carried out to meet the requirements.
4.2 Test enclosure class
According to GB 4208 tested and meet the corresponding requirements.
4.3 Dust test
4.3.1 Objective
Housing seal performance test fire electronic products.
4.3.2 Test Equipment
Test equipment should meet the GB/T 2423.37-2006 requirements in 4.3.3.3.
4.3.3 Test procedure
4.3.3.1 test dust through the sieve capable of 75μm, wire diameter planar mesh sieve 50μm dry talc. test
Dust with a number of at least 2kg/m3 (chamber volume). Airflow velocity in the test chamber shall ensure that a uniform test dust in the test chamber.
4.3.3.2 sample before testing device is turned on, under normal atmospheric conditions placed not less than 2h.
4.3.3.3 The sample was placed in the test chamber. Its volume should not exceed 25% of the volume of the chamber, the sample chamber should not exceed the base work
50% of the horizontal area of the space. For not a whole into the chamber, can be used.
a) for each section separately enclosed test;
b) have the same structure of the sample smaller product tested.
4.3.3.4 After the specimen is installed, start blowing dust (dust test), the duration of 8h. Samples were taken 30min after the test is stopped and placed
Under normal atmospheric conditions to restore at least 2h. After the test, observe and record the electrical and mechanical parameters of the sample.
4.3.4 Test Results
After the test, the sample should be able to work properly.
4.4 surface abrasion resistance test
4.4.1 Objective
Surface Inspection ground installation of fire electronic products wear resistance.
4.4.2 Test Equipment
Test equipment requirements are as follows.
a) Taber type abrasion tester or equivalent;
b) produced in accordance with Appendix A of the grinding wheel.
4.4.3 Test procedure
Produced in accordance with Appendix A of the grinding wheel, and a good stick corundum grain size of # 180 emery cloth after No. 3, at a temperature of 15 ℃ ~ 35 ℃, relative humidity
25% to 75% of the atmospheric environment placed 24h or more. With gauze to wipe the surface of the sample surface mounting upward abrasion tester
On, and the grinding wheel is mounted on the carriage, grinding is applied under external conditions 4.9N ± 0.2N 9000 rpm, grinding wheel wear per 500 turns
Replacement.
4.4.4 Test Results
After the test, the sample had no effect on the appearance of damage to normal operation, the sample functions shall meet the appropriate requirements of product standards.
4.5 Impact Test
4.5.1 Objective
Impact resistance test ground fire emergency lighting installation surface of the panel.
4.5.2 Test procedure
The sample according to the manufacturer's instructions for installation, it is in the normal operating position, the surface remains level. Then a diameter of 63.5mm
(Mass of about 1040g) on the surface of the smooth surface of the balls from the sample height 1000mm, making free-fall. The point of impact should be
The specimen from the four corners of the frame 25mm range, the impact of each of the four corners 1, observe and record the state of the sample.
4.5.3 Test Results
After the test, the sample surface of the panel should be no broken, cracks and other mechanical damage phenomenon, function should meet the requirements of GB 17945.
4.6 glow wire flammability test
4.6.1 Objective
Fire burning test electronic products due to overload resistance elements or the like heat in a short time caused by thermal effects of fire hazard forces.
4.6.2 Test Equipment
Test equipment should meet the GB/T 5169.10-2006 requirements.
4.6.3 Test procedure
4.6.3.1 In the smooth white pine board thickness of about 10mm silk wrap a layer of paper laying the ground floor. One sample shall be placed in the ground floor and spread
Temperature of 15 ℃ ~ 35 ℃, relative humidity of 25% to 75% of the atmosphere 24h.
4.6.3.2 The sample in the normal installation position, and to ensure that the contact surface of the sample and the top of the glow wire vertical. Shop placed in the bottom of the sample
200mm ± 5mm at the bottom. If the specimen is equipment cabinet, laying the bottom should be extended around the base of the device at least 100mm.
4.6.3.3 according to the provisions of GB/T 5169.10-2006 Chapter 8 were tested. The top of the glow-wire shall be applied in the thinnest of the sample, and
From the upper edge of the sample is not less than 15mm.
4.6.3.4 during the application of the glow-wire and thereafter 30s, observation of samples is spread around the parts and the underlying state and record.
b) maximum flame height should be adjusted to 5mm up a gear. But from the beginning of combustion, may produce too high flame for about 1s, this
Flame may not count.
NOTE. When burning flame height refers to Si Shijia on the sample from the upper edge of the glow-wire to observe the vertical distance from the top of the flame visible in the soft low light.
4.6.4 Test Results
The specimen shall meet one of the following two conditions.
a) No flame or burning;
The tissue paper can not afford fuel, parts around the sample is not completely burn.
4.7 needle-flame test
4.7.1 Objective
Fire electronic products inspection under fault conditions caused by local small flame of fire risk.
4.7.2 Test Equipment
Test equipment should meet the GB/T 5169.5-1997 requirements of.
4.7.3 Test procedure
4.7.3.1 In the smooth white pine board thickness of about 10mm silk wrap a layer of paper laying the ground floor. The three samples and placed in the ground floor shop
Temperature of 15 ℃ ~ 35 ℃, relative humidity of 25% to 75% of the atmosphere 24h.
4.7.3.2 burner flame confirmation. in poorly ventilated environment to 12mm ± 1mm high flame (purity of not less than 95%
Butane gas flame or gas as an alternative source) on a copper block after processing (drilling but has not completed the entire machined, diameter of 4mm, the quality of
0.58g ± 0.01g) were tested. Measured three times by the copper block temperature was raised to 100 ℃ ± 2 ℃ time required for 700 ℃ ± 3 ℃ (initial copper block
Temperature less than 50 ℃), three times the average time should be within the 23.5s ± 1.0s.
4.7.3.3 The normal use of the most unfavorable position the sample (test flame should not spread or flame effect an impact) installation, BEDDING
Layer placed below the 200mm ± 5mm of the specimen, if the specimen is equipment cabinet, laying around the bottom base of the device at least prolong
100mm. The burner is fixed at an angle of 45 ° with the horizontal height adjustable jig, the combustion burner, stable 5min after the combustion
Move to the bottom of the burner or the side of the sample tested. Applying a test fire continued 30s ± 1s.
4.7.3.4 During the application of the test of fire and after the end of the trial, observe the sample, sample parts and shop around the bottom of the state and record.
Or lay off the bottom of the flame burning phenomenon can not see this time interval);
b) the degree of physical damage to the sample.
4.7.4 Test Results
The specimen shall meet one of the following two conditions.
a) the sample does not produce a flame and burning phenomenon, and can not afford to shop underlying tissue paper or white pine wood is not burning charring;
Tissue paper or white pine planks not afford to burn charring.
4.8 flame retardant performance test
According to GB 20286-2006 tested and meet the corresponding requirements.
4.9 Mechanical strength test terminals
4.9.1 Objective
Fire electronic products inspection terminals mechanical strength properties.
4.9.2 Test Equipment
Measuring instruments and torque tightening tool.
4.9.3 Test procedure
First, use the appropriate type of maximum cross-section of the conductor to be tested.
Each terminal connected to the conductor and removed five times. Each conductor should be replaced after removing the new conductor for the next test.
For screw-type terminals, tightening torque according to Table 1 for 110% of the provisions specified by the manufacturer or the torque (whichever is greater) for testing.
Tests were fastened on two parts.
It can also be used with a hexagonal head screwdriver to tighten the screws, if the column values in Table 1 of the first Ⅱ and Ⅲ of the column are different, the test twice, first
Torque Table 1 column specified in Section Ⅲ test is applied on the cap screws, and then another group of samples in Table 1 column first Ⅱ specified torque
Use a screwdriver to tighten the screws a second test.
If the column values in Table 1 of Ⅱ Ⅲ first column of the same, only a screwdriver to tighten test.
4.9.4 Test Results
During the test, the fastening member and the terminals shall not work loose and there should be damage will affect the next use.
Table 1 screw-type terminal mechanical strength of the tightening torque
Thread diameter
mm
Tightening torque
Nm
Metric standard values diameter range Ⅰ Ⅱ Ⅲ
2.5
3.0
3.5
3.5
4.5
Φ≤2.8
2.8 < Φ≤3.0
3.0 < Φ≤3.2
3.2 < Φ≤3.6
3.6 < Φ≤4.1
4.1 < Φ≤4.7
4.7 < Φ≤5.3
5.3 < Φ≤6.0
6.0 < Φ≤8.0
8.0 < Φ≤10.0
10 < Φ≤12
12 < Φ≤15
15 < Φ≤20
20 < Φ≤24
Φ > 24
0.2
0.25
0.3
0.4
0.7
0.8
0.8
1.2
2.5
0.4
0.5
0.6
0.8
1.2
1.8
2.0
2.5
3.5
4.0
0.4
0.5
0.6
0.8
1.2
1.8
2.0
3.0
6.0
10.0
14.0
19.0
25.0
36.0
50.0
Note. The first column Ⅰ. for when tightened does not protrude outside the hole headless screws and can not be larger than the width of the screw blade screwdriver to tighten the root diameter of the other
Screws;
Chapter Ⅱ column. for with a screwdriver to tighten the screws and nuts;
Chapter Ⅲ column. for better tools than a screwdriver to tighten the screws and nuts.
4.10 rain test
4.21 GB 16838-2005 in accordance tested and meet the corresponding requirements.
Appendix A
(Normative)
Grinding wheel production
Figure A. 1 is a schematic view of the grinding wheel, the inner ring is made of paper or cloth laminate; thickness of 12.7mm ± 0.2mm, diameter
38.1mm ± 0.2mm, a center hole diameter of 16.0mm, wrapped in a layer of a Shore hardness of the rubber layer 50 to 55, a width of
12.7mm ± 0.2mm, thickness of 6.3mm, with neoprene adhesive adhered to the grinding wheel on the inner ring, the outermost layer is a width of 12.7mm ±
0.2mm The AP180/3 Shabu, with polyvinyl acetate emulsion, or 5% to 10% polyvinyl alcohol solution viscosity on rubber wheels. Made good
Finally, the diameter of the grinding wheel should be 51.4mm ± 0.6mm. Quality wheel is 27g ± 2g. Bonding glue should be to prevent contamination of sand, sand
Cloth should neither overlap joints and seams leave. Each grinding wheel can only be used once and should be replaced with a new specimen exchange emery cloth. When the grinding wheel
Outsourcing rubber layer hardness exceeds a predetermined range, and should be replaced.
Millimeters
Figure A. 1 a schematic view of the grinding wheel
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