This Rules is issued by the China Quality Certification Center with copyright reserved by the China Quality Certification Center. Any organization or individual shall not use it, in whole or in part, in any form without the permission of the China Quality Certification Center.
Formulated by: China Quality Certification Center.
Drafting organizations: Mechanical Industry Low-voltage Explosion-proof Electrical Apparatus Supervision and Inspection Center, Jiamusi Explosion-proof Electric Machine Institute, Shenyang Product Quality Supervision and Inspection Institute.
Main drafting personnel: Zhang Yong, Guo Xuejing, Wu Lan, Jia Yingwei, Lang Jiancai, Liang Bin
Safety Certification Rules for
Explosion Proof Electrical Products
1 Scope
This Rules applies to certification of various explosion-proof electrical products, including explosion-proof electric machinery, explosion-proof electric pumps, explosion-proof distribution boxes, explosion-proof instrument boxes, explosion-proof switches, control and protection products, explosion-proof electric actuators, solenoid valves, ventilation equipment, explosion-proof accessories, Ex components, explosion-proof instrumentation, sensors, safety barriers.
2 Certification mode
The certification mode is: product type test + initial factory inspection + post-certification supervision.
The basic certification processes include:
a. Application for certification
b. Product type test
c. Initial factory inspection
d. Evaluation and approval of certification results
e. Post-certification supervision
3 Application for certification
3.1 Certification unit division
In principle, products of the same manufacturer are divided according to the type of protection and the type of product.
There are 8 types of protection, including: flame-proof type (d), increased safety type (e), intrinsic safety type (i), pressurized type (p), type n (n), and encapsulation type (m).
For example, the flame-proof switches of various series and models produced by the same production enterprise shall be considered as a certification unit; the flame-proof switches and composite switches produced by the same production enterprise shall be considered as different certification units; the flame-proof switches and flame-proof circuit breakers produced by the same production enterprise shall be considered as different certification units.
3.2 Submittals for certification application
3.2.1 Application documents
a. Formal application form (application form filled out on the Internet and printed or downloaded and filled out)
b. Factory inspection questionnaire (at the time of initial application)
c. Explosion-proof electrical product description (CQC11-020306.01-2019)
3.2.2 Certification documents
a. Registration certificate of the applicant, manufacturer, and factory, such as business license, organization code (at the time of initial application)
b. Production license (if any)
c. Relevant agreements or contracts executed between the certification client, producer, and production enterprise (such as ODM agreement, OEM agreement, authorization);
d. The power of attorney of the agent (if any)
e. Valid supervision and inspection report or factory inspection report (if any)
f. Other required documents
4 Type test
4.1 Sample
4.1.1 Principle of sample submission
CQC selects a representative sample from the applicant certification unit. In order to ensure that the samples submitted can represent the product scope to be applied for certification in the future, in principle, the products with high complexity is preferred to be submitted, and if necessary additional samples are selected for difference test.
Table 1 Inspection units of explosion-proof electric machinery
No. Certification unit Type of protection
1 Electric motor with center height less than or equal to 160mm or rated power less than or equal to 15kW 1. Flameproof type
2. Increased safety
3. Type "n"
4. Pressurized enclosure
5. Protection against dust by enclosure
2 Electric motors with center height greater than 160mm, up to 280mm (inclusive) or rated power greater than 15kW, up to 100kW (inclusive)
3 Electric motors with center height greater than 280mm, up to 500mm (inclusive) or rated power greater than 100kW, up to 500kW (inclusive)
4 Electric motors with center height greater than 500mm or rated power greater than 500kW
4.1.2 Number of samples
The samples for type test shall are selected and submitted to the designated testing body by the applicant according to the requirements of CQC.
Different series of products shall have samples submitted separately. The same series of products shall have samples submitted separately according to types of protection. When there are no more than four specifications, two samples of any one specification shall be submitted. When there are more than four specifications, two samples respectively for two specifications shall be submitted.
4.1.3 Disposal of samples and documents
After the test is completed and the test report is issued, the relevant test records and related documents are kept by the testing body, and the samples are disposed according to the relevant provisions of CQC.
4.2 Type test
4.2.1 Standard references and inspection items
GB 3836.1-2010 Explosive atmospheres—Part 1: equipment—General requirements
GB 3836.2-2010 Explosive atmospheres—Part 2: Equipment protection by flameproof enclosures d
GB 3836.3-2010 Explosive atmospheres—Part 3: Equipment protection by increased safety e
GB 3836.4-2010 Explosive atmospheres—Part 4: Equipment protection by intrinsic safety i
GB/T 3836.5-2017 Explosive atmospheres—Part 5: Equipment protection by pressurized enclosure p
GB 3836.8-2014 Explosive atmospheres—Part 8: Equipment protection by type of protection “n”
GB 3836.9-2014 Explosive atmospheres—Part 9: Equipment protection by type of protection “m”
GB 12476.1-2013 Electrical apparatus for use in the presence of combustible dust—Part 1: General requirements
GB 12476.5-2013 Electrical apparatus for use in the presence of combustible dust—Part 5: Protection by enclosures tD
GB 18613-2012 Minimum allowable values of energy efficiency and energy efficiency grades for small and medium three-phase asynchronous motors
The certification basis and inspection items are shown in Table 2 below:
Table 2 Certification basis and inspection items
No. Type of protection Standard No. Test items
1 Flameproof GB 3836.1-2010 Structural inspection, impact test, drop test (only for portable products), temperature measurement, thermal shock test (only for products with glass transparent parts), torsion test of insulating sleeve, heat resistance test, cold resistance test (only for non-metallic enclosures or non-metallic components of enclosure), clamping test of the entry device, seal test and mechanical strength test of the entry device, voltage withstand test of enclosure, flame ablation test (only for products with non-metallic flameproof surfaces), internally-ignited explosion non- propagation test, maximum bubble test, pore size (only for products with respiratory drainage device), determination of efficiency
GB 3836.2-2010
2 Increased safety GB 3836.1-2010 Structural inspection, impact test, drop test (only for portable products), enclosure protection (IP) test, temperature measurement, thermal shock test (only for products with glass transparent parts), heat resistance test, cold resistance test (only for non-metallic enclosures or non-metallic components of enclosure), asymmetric pulse and asymmetric power (for dual-pin fluorescent lamps only), surface resistance measurement/capacitance measurement/electrification test of non-metallic enclosure component, terminal insulation material test, vibration test (for dual-pin fluorescent lamps only), tE time measurement, starting current ratio, clamping test of the entry device, dielectric strength test, determination of efficiency
GB 3836.3-2010
3 Intrinsic safety GB 3836.1-2010 Structural inspection, drop test (only for portable products), temperature measurement, thermal shock test (only for products with glass transparent parts), surface resistance measurement/capacitance measurement/electrification test of non-metallic enclosure component, dielectric strength test, spark ignition test, battery electrolyte leakage test (only for products with battery), battery surface temperature test (only for products with battery)
GB 3836.4-2010
4 Type "n” GB 3836.1-2010 Structural inspection, impact test, enclosure protection (IP) test, temperature measurement, thermal shock test (only for products with glass transparent parts), clamping test of the entry device, restricted breathing enclosure test, electrical strength, heat resistance test (only for non-metallic enclosures or non-metallic components of enclosure), mechanical shock test (only for products with accumulators), insulation resistance test of batteries (only for products with accumulators), sealing device test (if applicable), edison screw holder test (if applicable), luminaire starter holder test (if applicable), starter test (if applicable), trigger test (if applicable), determination of efficiency
GB 3836.8-2010
5 Encapsulation type m GB 3836.1-2010 Structural inspection, impact test, cable pull our test, maximum temperature, heat resistance test, cold resistance test, insulation dielectric strength test, composite water absorption test, pressure test, resettable temperature protection device test, seal test of built-in protection device
GB 3836.9-2014
6 Pressurized enclosure GB 3836.8-2010 Structural inspection, impact test, temperature measurement, thermal shock test (only for products with glass transparent parts), heat resistance test, cold resistance test (only for non-metallic enclosures or non-metallic components of enclosure), clamping test of the entry device, maximum positive pressure test, leakage test, ventilation test of pressurized enclosure with internal release source and air-fill procedure test in the case of static positive pressure, ventilation and dilution test of pressurized enclosure with internal release source, test for trouble free built-in system, pressurized test of built-in system with limited release, performance inspection of pressurized enclosure with limited internal pressure, minimum positive pressure inspection, protection device actuation reliability test, determination of efficiency.
GB/T 3836.5-2017
7 Protection against dust by enclosure GB 12746.1-2013 Structural inspection, impact test, drop test (only for portable products), enclosure protection test, temperature measurement, thermal shock test (only for products with glass transparent parts), heat resistance test, cold resistance test (only for non-metallic enclosures products), clamping test of the entry device, aging test of elastic sealing ring, determination of efficiency
GB 12746.5-2013
8 For other dust type, GB3836 standard applies
4.2.2 Test method
The test is carried out according to the test method specified by the relevant standards.
4.2.3 Type test period
Generally, it is 40 work days (the time for rectification and re-inspection by the enterprise due to failed test item is excluded). The period is calculated from the receipt of samples and inspection fees. The period is subject to the longest time for testing key components, important materials and non-metallic materials of the whole machine if need to be randomly tested (calculated on receipt of samples and inspection fees).
4.2.4 Judgment
Any inspection item failed will rendered the sample rejected. Among the two specifications sampled from the same series of products, either of the two failed will render the product series rejected.
The testing is performed by the testing body designated by CQC who shall issue a test report in the prescribed format. After the certification is approved, the testing body is responsible for delivering a test report to the applicant.
5 Initial factory inspection
5.1 Contents
The factory inspection covers factory quality assurance ability and product conformity check.
It also covers the production equipment (Annex 2) and inspection equipment (Annex 3) that the enterprise shall possess for producing explosion-proof electrical products.
5.1.1 Factory quality assurance ability inspection
It shall comply with CQC/F 001-2009 CQC Certification Requirements of Factory Quality Assurance Ability.
5.1.2 Product conformity check
During factory inspection, the conformity of the product under certification shall be checked on the production site, and the following contents shall be focused on.
1) The identification of the product under certification shall conform to the information indicated on the type test report;
2) The structure of the product under certification shall be conform to the type test report and product description;
3) Each series of product shall have at least one specification and model sampled for conformity check. For factory inspection, on-site designated tests may be taken for product safety performance.
5.1.3 The factory quality assurance ability inspection and product conformity check shall cover all products and processing sites under certification.
Foreword i
1 Scope
2 Certification mode
3 Application for certification
4 Type test
5 Initial factory inspection
6 Evaluation and approval of certification result
7 Post-certification supervision
8 Certificate
9 Use of the certification mark
10 Certification charges
Safety Certification Rules for Explosion Proof Electrical Products
Chinese Name
防爆电气产品安全认证规则
Chinese Classification
Professional Classification
CQ
ICS Classification
Issued by
CQC
Issued on
2019-01-25
Implemented on
2019-1-25
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
7000 words
Price(USD)
330.0
Keywords
CQC11-020306-2019, , CQC11-020306-2019, CQC11,
Introduction of CQC11-020306-2019
This Rules is issued by the China Quality Certification Center with copyright reserved by the China Quality Certification Center. Any organization or individual shall not use it, in whole or in part, in any form without the permission of the China Quality Certification Center.
Formulated by: China Quality Certification Center.
Drafting organizations: Mechanical Industry Low-voltage Explosion-proof Electrical Apparatus Supervision and Inspection Center, Jiamusi Explosion-proof Electric Machine Institute, Shenyang Product Quality Supervision and Inspection Institute.
Main drafting personnel: Zhang Yong, Guo Xuejing, Wu Lan, Jia Yingwei, Lang Jiancai, Liang Bin
Safety Certification Rules for
Explosion Proof Electrical Products
1 Scope
This Rules applies to certification of various explosion-proof electrical products, including explosion-proof electric machinery, explosion-proof electric pumps, explosion-proof distribution boxes, explosion-proof instrument boxes, explosion-proof switches, control and protection products, explosion-proof electric actuators, solenoid valves, ventilation equipment, explosion-proof accessories, Ex components, explosion-proof instrumentation, sensors, safety barriers.
2 Certification mode
The certification mode is: product type test + initial factory inspection + post-certification supervision.
The basic certification processes include:
a. Application for certification
b. Product type test
c. Initial factory inspection
d. Evaluation and approval of certification results
e. Post-certification supervision
3 Application for certification
3.1 Certification unit division
In principle, products of the same manufacturer are divided according to the type of protection and the type of product.
There are 8 types of protection, including: flame-proof type (d), increased safety type (e), intrinsic safety type (i), pressurized type (p), type n (n), and encapsulation type (m).
For example, the flame-proof switches of various series and models produced by the same production enterprise shall be considered as a certification unit; the flame-proof switches and composite switches produced by the same production enterprise shall be considered as different certification units; the flame-proof switches and flame-proof circuit breakers produced by the same production enterprise shall be considered as different certification units.
3.2 Submittals for certification application
3.2.1 Application documents
a. Formal application form (application form filled out on the Internet and printed or downloaded and filled out)
b. Factory inspection questionnaire (at the time of initial application)
c. Explosion-proof electrical product description (CQC11-020306.01-2019)
3.2.2 Certification documents
a. Registration certificate of the applicant, manufacturer, and factory, such as business license, organization code (at the time of initial application)
b. Production license (if any)
c. Relevant agreements or contracts executed between the certification client, producer, and production enterprise (such as ODM agreement, OEM agreement, authorization);
d. The power of attorney of the agent (if any)
e. Valid supervision and inspection report or factory inspection report (if any)
f. Other required documents
4 Type test
4.1 Sample
4.1.1 Principle of sample submission
CQC selects a representative sample from the applicant certification unit. In order to ensure that the samples submitted can represent the product scope to be applied for certification in the future, in principle, the products with high complexity is preferred to be submitted, and if necessary additional samples are selected for difference test.
Table 1 Inspection units of explosion-proof electric machinery
No. Certification unit Type of protection
1 Electric motor with center height less than or equal to 160mm or rated power less than or equal to 15kW 1. Flameproof type
2. Increased safety
3. Type "n"
4. Pressurized enclosure
5. Protection against dust by enclosure
2 Electric motors with center height greater than 160mm, up to 280mm (inclusive) or rated power greater than 15kW, up to 100kW (inclusive)
3 Electric motors with center height greater than 280mm, up to 500mm (inclusive) or rated power greater than 100kW, up to 500kW (inclusive)
4 Electric motors with center height greater than 500mm or rated power greater than 500kW
4.1.2 Number of samples
The samples for type test shall are selected and submitted to the designated testing body by the applicant according to the requirements of CQC.
Different series of products shall have samples submitted separately. The same series of products shall have samples submitted separately according to types of protection. When there are no more than four specifications, two samples of any one specification shall be submitted. When there are more than four specifications, two samples respectively for two specifications shall be submitted.
4.1.3 Disposal of samples and documents
After the test is completed and the test report is issued, the relevant test records and related documents are kept by the testing body, and the samples are disposed according to the relevant provisions of CQC.
4.2 Type test
4.2.1 Standard references and inspection items
GB 3836.1-2010 Explosive atmospheres—Part 1: equipment—General requirements
GB 3836.2-2010 Explosive atmospheres—Part 2: Equipment protection by flameproof enclosures d
GB 3836.3-2010 Explosive atmospheres—Part 3: Equipment protection by increased safety e
GB 3836.4-2010 Explosive atmospheres—Part 4: Equipment protection by intrinsic safety i
GB/T 3836.5-2017 Explosive atmospheres—Part 5: Equipment protection by pressurized enclosure p
GB 3836.8-2014 Explosive atmospheres—Part 8: Equipment protection by type of protection “n”
GB 3836.9-2014 Explosive atmospheres—Part 9: Equipment protection by type of protection “m”
GB 12476.1-2013 Electrical apparatus for use in the presence of combustible dust—Part 1: General requirements
GB 12476.5-2013 Electrical apparatus for use in the presence of combustible dust—Part 5: Protection by enclosures tD
GB 18613-2012 Minimum allowable values of energy efficiency and energy efficiency grades for small and medium three-phase asynchronous motors
The certification basis and inspection items are shown in Table 2 below:
Table 2 Certification basis and inspection items
No. Type of protection Standard No. Test items
1 Flameproof GB 3836.1-2010 Structural inspection, impact test, drop test (only for portable products), temperature measurement, thermal shock test (only for products with glass transparent parts), torsion test of insulating sleeve, heat resistance test, cold resistance test (only for non-metallic enclosures or non-metallic components of enclosure), clamping test of the entry device, seal test and mechanical strength test of the entry device, voltage withstand test of enclosure, flame ablation test (only for products with non-metallic flameproof surfaces), internally-ignited explosion non- propagation test, maximum bubble test, pore size (only for products with respiratory drainage device), determination of efficiency
GB 3836.2-2010
2 Increased safety GB 3836.1-2010 Structural inspection, impact test, drop test (only for portable products), enclosure protection (IP) test, temperature measurement, thermal shock test (only for products with glass transparent parts), heat resistance test, cold resistance test (only for non-metallic enclosures or non-metallic components of enclosure), asymmetric pulse and asymmetric power (for dual-pin fluorescent lamps only), surface resistance measurement/capacitance measurement/electrification test of non-metallic enclosure component, terminal insulation material test, vibration test (for dual-pin fluorescent lamps only), tE time measurement, starting current ratio, clamping test of the entry device, dielectric strength test, determination of efficiency
GB 3836.3-2010
3 Intrinsic safety GB 3836.1-2010 Structural inspection, drop test (only for portable products), temperature measurement, thermal shock test (only for products with glass transparent parts), surface resistance measurement/capacitance measurement/electrification test of non-metallic enclosure component, dielectric strength test, spark ignition test, battery electrolyte leakage test (only for products with battery), battery surface temperature test (only for products with battery)
GB 3836.4-2010
4 Type "n” GB 3836.1-2010 Structural inspection, impact test, enclosure protection (IP) test, temperature measurement, thermal shock test (only for products with glass transparent parts), clamping test of the entry device, restricted breathing enclosure test, electrical strength, heat resistance test (only for non-metallic enclosures or non-metallic components of enclosure), mechanical shock test (only for products with accumulators), insulation resistance test of batteries (only for products with accumulators), sealing device test (if applicable), edison screw holder test (if applicable), luminaire starter holder test (if applicable), starter test (if applicable), trigger test (if applicable), determination of efficiency
GB 3836.8-2010
5 Encapsulation type m GB 3836.1-2010 Structural inspection, impact test, cable pull our test, maximum temperature, heat resistance test, cold resistance test, insulation dielectric strength test, composite water absorption test, pressure test, resettable temperature protection device test, seal test of built-in protection device
GB 3836.9-2014
6 Pressurized enclosure GB 3836.8-2010 Structural inspection, impact test, temperature measurement, thermal shock test (only for products with glass transparent parts), heat resistance test, cold resistance test (only for non-metallic enclosures or non-metallic components of enclosure), clamping test of the entry device, maximum positive pressure test, leakage test, ventilation test of pressurized enclosure with internal release source and air-fill procedure test in the case of static positive pressure, ventilation and dilution test of pressurized enclosure with internal release source, test for trouble free built-in system, pressurized test of built-in system with limited release, performance inspection of pressurized enclosure with limited internal pressure, minimum positive pressure inspection, protection device actuation reliability test, determination of efficiency.
GB/T 3836.5-2017
7 Protection against dust by enclosure GB 12746.1-2013 Structural inspection, impact test, drop test (only for portable products), enclosure protection test, temperature measurement, thermal shock test (only for products with glass transparent parts), heat resistance test, cold resistance test (only for non-metallic enclosures products), clamping test of the entry device, aging test of elastic sealing ring, determination of efficiency
GB 12746.5-2013
8 For other dust type, GB3836 standard applies
4.2.2 Test method
The test is carried out according to the test method specified by the relevant standards.
4.2.3 Type test period
Generally, it is 40 work days (the time for rectification and re-inspection by the enterprise due to failed test item is excluded). The period is calculated from the receipt of samples and inspection fees. The period is subject to the longest time for testing key components, important materials and non-metallic materials of the whole machine if need to be randomly tested (calculated on receipt of samples and inspection fees).
4.2.4 Judgment
Any inspection item failed will rendered the sample rejected. Among the two specifications sampled from the same series of products, either of the two failed will render the product series rejected.
The testing is performed by the testing body designated by CQC who shall issue a test report in the prescribed format. After the certification is approved, the testing body is responsible for delivering a test report to the applicant.
5 Initial factory inspection
5.1 Contents
The factory inspection covers factory quality assurance ability and product conformity check.
It also covers the production equipment (Annex 2) and inspection equipment (Annex 3) that the enterprise shall possess for producing explosion-proof electrical products.
5.1.1 Factory quality assurance ability inspection
It shall comply with CQC/F 001-2009 CQC Certification Requirements of Factory Quality Assurance Ability.
5.1.2 Product conformity check
During factory inspection, the conformity of the product under certification shall be checked on the production site, and the following contents shall be focused on.
1) The identification of the product under certification shall conform to the information indicated on the type test report;
2) The structure of the product under certification shall be conform to the type test report and product description;
3) Each series of product shall have at least one specification and model sampled for conformity check. For factory inspection, on-site designated tests may be taken for product safety performance.
5.1.3 The factory quality assurance ability inspection and product conformity check shall cover all products and processing sites under certification.
Contents of CQC11-020306-2019
Foreword i
1 Scope
2 Certification mode
3 Application for certification
4 Type test
5 Initial factory inspection
6 Evaluation and approval of certification result
7 Post-certification supervision
8 Certificate
9 Use of the certification mark
10 Certification charges
