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GB/T 3836.1-2021 English PDF (GB 3836.1-2010, GB 3836.1-2000)

GB/T 3836.1-2021_English: PDF (GB/T3836.1-2021)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 3836.1-2021English1405 Add to Cart 0--9 seconds. Auto-delivery Explosive atmospheres -- Part 1: Equipment -- General requirements Valid GB/T 3836.1-2021
GB 3836.1-2010English150 Add to Cart 0--9 seconds. Auto-delivery [Replaced by GB/T 3836.1-2021] Explosive atmospheres -- Part 1: Equipment -- General requirements Obsolete GB 3836.1-2010
GB 3836.1-2000EnglishRFQ ASK 9 days [Need to translate] Electrical apparatus for explosive gas atmospheres-Part 1: General requirements Obsolete GB 3836.1-2000
GB 3836.1-1983EnglishRFQ ASK 3 days [Need to translate] Electrical apparatus for explosive atmosphere--General requirements Obsolete GB 3836.1-1983


BASIC DATA
Standard ID GB/T 3836.1-2021 (GB/T3836.1-2021)
Description (Translated English) Explosive atmospheres -- Part 1: Equipment -- General requirements
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard K35
Classification of International Standard 29.260.20
Word Count Estimation 109,157
Date of Issue 2021-10-11
Date of Implementation 2022-05-01
Older Standard (superseded by this standard) GB 12476.1-2013; GB 3836.1-2010
Drafting Organization Nanyang Explosion-proof Electrical Research Institute Co., Ltd., Shanghai Instrumentation Automatic Control System Inspection and Testing Institute Co., Ltd., Shenyang Electric Transmission Research Institute (Co., Ltd.), Shanghai Institute of Quality Supervision and Inspection Technology, Huarong Technology Co., Ltd., Shenyang Research Institute of Coal Science Group Institute Co., Ltd., China Coal Science and Industry Group Chongqing Research Institute Co., Ltd., Hanwei Technology Group Co., Ltd., Wolong Electric Nanyang Explosion-proof Group Co., Ltd., Shenzhen Te'an Electronics Co., Ltd., Beijing Sanying United Petroleum Technology Co., Ltd., Gulf Safety Technology Co., Ltd., New Liming Technology Co., Ltd., Helong Explosion-proof Electric Co., Ltd., Feice Explosion-proof Electric Co., Ltd., Jiamusi Electric Co., Ltd.
Administrative Organization National Standardization Technical Committee for Explosion-proof Electrical Equipment (SAC/TC 9)
Regulation (derived from) National Standard Announcement No. 12 of 2021
Proposing organization China Electrical Equipment Industry Association
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

BASIC DATA
Standard ID GB 3836.1-2010 (GB3836.1-2010)
Description (Translated English) Explosive atmospheres. Part 1: Equipment. General requirements [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China]
Sector / Industry National Standard
Classification of Chinese Standard K35
Classification of International Standard 29.260.20
Word Count Estimation 64,670
Date of Issue 2010-08-09
Date of Implementation 2011-08-01
Older Standard (superseded by this standard) GB 3836.1-2000
Quoted Standard GB/T 70.1-2008; GB/T 77-2007; GB/T 78-2007; GB/T 79-2007; GB/T 80-2007; GB/T 197-2003; GB 755-2008; GB/T 1040.2-2006; GB/T 1043-1993; GB/T 1408.1-2006; GB/T 1690-2006; GB/T 2423.4-2008; GB/T 2516-2003; GB/T 2571-1995; GB/T 2900.35-2008; GB 3836.2-2010; GB 3836.3-2010; GB 3836.4-2010; GB 3836.5-2004; GB 3836.6-2004; GB 3836.7-2004; GB 3836.8-2003; GB 3836.9-2006; GB 3836.11-2008; GB 3836.12-2008; GB 3836.14-2000; GB 3836.15-2000; GB 3836.18-2010; GB 3836.20-2010; GB 4208-2008; GB/T 4942.1-2006; GB/T 5008.1-2005; GB/T 5277-1985; GB/T 5332-2007; GB/T 5782-2000; GB/T 5783-2000; GB/T 6031-1998; GB/T 6170-2000; GB/T 6919-1986; GB 7957-2003; GB/T 8897.1-2003; GB/T 9144-2003; GB/T 9341-2008; GB/T 11020-2005; GB/T 11026.1-2003; GB/T 11026.2-2000; GB 12476.2-2010;
Adopted Standard IEC 6007900-2007, MOD
Drafting Organization Explosion Protection Electric Institute
Administrative Organization National Standardization Technical Committee explosion-proof electrical equipment
Regulation (derived from) Announcement of Newly Approved National Standards No. 3, 2010 (No. 158 overall)
Proposing organization China Electrical Equipment Industry Association
Issuing agency(ies) Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China
Summary This Chinese standard relates to explosive environment with electrical equipment and Ex components of construction, testing and marking of the general requirements.

BASIC DATA
Standard ID GB 3836.1-2000 (GB3836.1-2000)
Description (Translated English) Electrical apparatus for explosive gas atmospheres-Part 1: General requirements
Sector / Industry National Standard
Classification of Chinese Standard K35
Classification of International Standard 29.260.20
Word Count Estimation 36,383
Date of Issue 2000/1/3
Date of Implementation 2000/8/1
Older Standard (superseded by this standard) GB 3836.1-1983
Adopted Standard IEC 60079-0-1998, MOD
Regulation (derived from) Announcement of Newly Approved National Standards 2010 No. (No. 158 overall) 3
Proposing organization National Machinery Industry Bureau
Issuing agency(ies) State Quality and Technical Supervision
Summary This Standard specifies the electrical equipment for explosive gas atmospheres, Ex entries, General requirements and test program structure, testing and marking of Ex components.


GB/T 3836.1-2021 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 29.260.20 CCS K 35 Replacing GB 3836.1-2010, GB 12476.1-2013 Explosive Atmospheres – Part 1: Equipment – General Requirements (IEC 60079-0:2017, Explosive Atmospheres – Part 0: Equipment – General Requirements, MOD) ISSUED ON: OCTOBER 11, 2021 IMPLEMENTED ON: MAY 01, 2022 Issued by: State Administration for Market Regulation; Standardization Administration of PRC. Table of Contents Foreword ... 4 Introduction ... 13 1 Scope ... 16 2 Normative References ... 19 3 Terms and Definitions ... 22 4 Equipment Grouping ... 40 5 Temperatures ... 41 6 Requirements for All Equipment ... 47 7 Non-Metallic Enclosures and Non-Metallic Parts of Enclosures ... 51 8 Metallic Enclosures and Metallic Parts of Enclosures ... 61 9 Fasteners ... 63 10 Interlocking Devices ... 66 11 Bushings ... 66 12 (Reserved for Future Use) ... 66 13 Ex Components ... 66 14 Connection Facilities ... 67 15 Connection Facilities for Earthing or Bonding Conductors ... 68 16 Entries into Enclosures ... 70 17 Supplementary Requirements for Electric Machines ... 73 18 Supplementary Requirements for Switchgear ... 77 19 Supplementary Requirements for Fuse ... 79 20 Supplementary Requirements for External Plugs, Socket Outlets and Connectors for Field Wiring Connection ... 79 21 Supplementary Requirements for Luminaires ... 80 22 Supplementary Requirements for Caplights and Handlights ... 82 23 Equipment Incorporating Cells and Batteries ... 82 24 Documentation ... 86 25 Compliance of Prototype or Sample with Documents ... 86 26 Type Tests ... 86 27 Routine Tests ... 110 28 Manufacturer's Responsibility ... 110 29 Marking ... 111 30 Instructions... 126 Annex A (Normative) Supplementary Requirements for Cable Glands ... 131 Annex B (Normative) Requirements for Ex Components ... 144 Annex C (Informative) Example of Rig for Resistance to Impact Test ... 147 Annex D (Informative) Electric Machines Connected to Converters ... 148 Annex E (Informative) Temperature Evaluation of Electric Machines ... 150 Annex F (informative) Guidance Flowchart for Tests of Non-Metallic Enclosures or Non-Metallic Parts of Enclosures (26.4) ... 155 Annex G (Informative) Guidance Flowchart for Tests of Cable Glands ... 156 Annex H (Informative) Shaft Voltages Resulting in Motor Bearing or Shaft Brush Sparking Discharge Energy Calculation ... 158 Annex I (Normative) Special Requirements for Group I Electrical Equipment ... 165 Annex J (Normative) Verification Procedure of Obtaining Certificate ... 166 Bibliography ... 168 Foreword This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents. This Document is Part 1 of GB/T 3836 Explosive Atmospheres. GB/T 3836 has published the following parts: --- Part 1: Equipment – General Requirements; --- Part 2: Equipment Protection by Flameproof Enclosure “d”; --- Part 3: Equipment Protection by Increased Safety “e”; --- Part 4: Equipment Protection by Intrinsic Safety “i”; --- Part 5: Equipment Protection by pressurized Enclosure “p”; --- Part 6: Equipment Protection by Liquid Immersion “o”; --- Part 7: Equipment Protection by Powder Filling “q”; --- Part 8: Equipment Protection by Type of Protection “n”; --- Part 9: Equipment Protection by Encapsulation “m”; --- Part 11: Material Characteristics for Gas and Vapour Classification - Test Methods and Data; --- Part 12: Material Characteristics for Combustible Dusts - Test Methods; --- Part 13: Equipment Repair, Overhaul, Reclamation and Modification; --- Part 14: Classification of Areas - Explosive Gas Atmosphere; --- Part 15: Electrical Installations Design, Selection and Erection; --- Part 16: Electrical Installations Inspection and Maintenance; --- Part 17: Equipment Protection by Pressurized Room “p” and Artificially Ventilated Room “v”; --- Part 18: Intrinsically Safe Electrical Systems; --- Part 20: Equipment with Equipment Protection Level (EPL) Ga; --- Part 21: Application of Quality Systems for Equipment Manufacture; --- Part 22: Protection of Equipment and Transmission System Using Optical Radiation; --- Part 23: Group I, Category EPL Ma Equipment Intended to Remain Functional in Atmospheres Endangered by Firedamp and/or Coal Dust; --- Part 24: Equipment Protection by Special Protection “s”; --- Part 25: Requirements for Process Sealing between Flammable Process Fluids and Electrical Systems; --- Part 26: Electrostatic Hazards – Guidance; --- Part 27: Electrostatic Hazards – Test; --- Part 28: Non-Electrical Equipment for Explosive Atmospheres - Basic Method and Requirements; --- Part 29: Non-Electrical Equipment for Explosive Atmospheres - Constructional Safety “c”, Control of Ignition Source “b”, Liquid Immersion “k”; --- Part 30: Equipment and Components in Explosive Atmospheres in Underground Mines; --- Part 31: Equipment Dust Ignition Protection by Enclosure “t”; --- Part 32: Intrinsically Safe Systems with Electronically Controlled Spark Duration Limitation; --- Part 33: Equipment in Adverse Service Conditions; --- Part 34: Equipment Assemblies; --- Part 35: Classification of Areas for Explosive Dust Atmospheres. This Document replaced GB 3836.1-2010 Explosive Atmospheres - Part 1: Equipment - General Requirement and GB 12476.1-2013 Electrical Apparatus for Use in the Presence of Combustible Dust - Part 1: General Requirements. Mainly based on GB 3836.1-2010, this Document integrates the major contents of GB 12476.1-2013; the major technical changes of this Document, except the structural adjustments and editorial modifications, are as follows: --- Integrate the requirements of equipment for combustible dust environment; --- Change the maximum surface temperature requirements of Group III electrical equipment (see 5.3.2.3 of this Edition; 5.3.2.3 of 2010 Edition); --- Increase the requirements for liner retention and the use of cement (see 6.5 of this Edition); --- Change the requirements of the ultrasonic source (see 6.6.3 of this Edition; 6.6.3 of 2010 Edition); --- Change the requirements for lasers, lamps or other non-divergent continuous wave light sources (see 6.6.4 of this Edition; 6.6.2 of 2010 Edition); --- Increase the replacement requirements of O-shaped elastic sealing ring (see 7.2.3 of this Edition); --- Change the electrostatic charge requirements on external non-metallic materials (see 7.4 of this Edition; 7.4 of 2010 Edition); ---Add the requirements for ancillary external metal parts (see 7.5 of this Edition); --- Increase the requirements for the use of copper alloys for the enclosure (see 8.5 of this Edition); ---Add the requirements of Ex component explosion-proof certificate (see 13.5 of this Edition); ---Add the requirements for cable entry devices, blanking elements, and threaded pipe joints (see 16.3~16.5 of this Edition); --- Change the supplementary requirements for rotating electrical machines (see Clause 17 of this Edition; Clause 17 of 2010 Edition); --- Change the supplementary requirements for plugs, sockets and connectors (see Clause 20 of this Edition; Clause 20 of 2010 Edition); --- Increase the types of single cells that can be used (see 23.3 of this Edition); --- Change the temperature measurement test (see 26.5.1 of this Edition; 26.5.1 of 2010 Edition); --- Change the heat resistance test (see 26.8 of this Edition; 26.8 of 2010 Edition); --- Change the ultraviolet (UV) resistance test (see 26.10 of this Edition; 26.10 of 2010 Edition); --- Delete the electrification test (see 26.14 of 2010 Edition); --- Change the capacitance measurement test (see 26.14 of this Edition; 26.15 of 2010 Edition); --- Increase fan rating verification (see 26.15 of this Edition); ---Add replacement assessment of the O-shaped elastic sealing ring (see 26.16 of this Edition); --- Increase the transfer charge test (see 26.17 of this Edition); --- Add the marking requirements for Ex-related equipment (see 29.4~29.5 of this Edition); --- Change the maximum surface temperature marking requirements for Group III Ex equipment (see 29.5 of this Edition; 29.4 of 2010 Edition); --- Increase the marking requirements for equipment installed in the boundary wall (see 29.9 of this Edition); --- Delete another marking of equipment protection level (see 29.12 of 2010 Edition); ---Add the additional marking requirements for motors controlled by converters (see 29.15 of this Edition); --- Change the marking example (see 29.16 of this Edition; 29.14 of 2010 Edition); ---Add the information included in the instruction manual (see 30.1 of this Edition); ---Add additional requirements for the motor manual (see 30.3 of this Edition); ---Add the Additional requirements for ventilation fan manuals (see 30.4 of this Edition); --- Increase the marking requirements for cable entry devices (see 30.5 and A.5 of this Edition); --- Change the applicability of the clauses to Ex components (see Annex B of this Edition; Annex B of 2010 Edition). This Document uses the redrafting method to modify and adopt IEC 60079-0:2017 Explosive Atmospheres – Part 0: Equipment – General Requirements. This Document made the following structural adjustments: --- Delete the following terms in the original IEC standard, such as 3.13.11 "casting", 3.14 "conformal coating", 3.18 "factory connector", 3.19 "field wiring connector", 3.21.1 "soft start converter", 3.25 "dust-tight enclosure", 3.42 "counting failure", 3.43 "non-counting failure", 3.45 "clear space", 3.47 "electrical isolation", 3.51 "reliable isolation", 3.55 "lower limit of combustion ", 3.61 "mist", 3.68 "spontaneous combustible substances", 3.71 "rated insulation voltage", 3.73 "reproduction peak voltage", 3.74 "related drawings", 3.77 "isolation parts", 3.78 "usable state", 3.81.3 "distance through pouring compound", 3.81.4 "distance through solid insulation", 3.81.5 “distance under coating”, 3.90 “upper limit of Explosive Atmospheres – Part 1: Equipment – General Requirements 1 Scope This Document specifies the general requirements for construction, testing and marking of Ex Equipment and Ex Components intended for use in explosive atmospheres. This Document applies to equipment intended to be used in an explosive gas atmospheres or an explosive dust atmospheres, including the equipment specified by the supplementary documents listed in this Document, as a general requirement when these equipment are used in an explosive atmospheres. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that Ex Equipment can be operated are: --- temperature -20 °C to +60 °C; --- pressure 80 kPa to 110 kPa; and --- air with normal oxygen content, typically 21 % v/v. This Document and other standards supplementing this Document specify additional test requirements for Ex Equipment operating outside the standard temperature range, but further additional consideration and additional testing may be required for Ex Equipment operating outside the standard atmospheric pressure range and standard oxygen content. Such additional testing may be particularly relevant with respect to Types of Protection that depend on quenching of a flame such as ‘flameproof enclosures “d”’ (GB/T 3836.2) or limitation of energy, ‘intrinsic safety “i”’ (GB/T 3836.4). NOTE 1: Although the standard atmospheric conditions above give a temperature range for the atmosphere of -20 °C to +60 °C, the normal ambient temperature range for the Ex Equipment is -20 °C to +40 °C, unless otherwise specified and marked. See 5.1.1. It is considered that - 20 °C to +40 °C is appropriate for many items of Ex Equipment and that to manufacture all Ex Equipment to be suitable for a standard atmosphere upper ambient temperature of +60 °C would place unnecessary design constraints. NOTE 2: Requirements given in this standard result from an ignition hazard assessment made on equipment. The ignition sources taken into account are those found associated with this type of equipment, such as hot surfaces, electromagnetic radiation, mechanically generated sparks, mechanical impacts resulting in thermite reactions, electrical arcing and static electric discharge in normal industrial environments. NOTE 3: Where an explosive gas atmosphere and a combustible dust atmosphere are, or can be, present at the same time, the simultaneous presence of both often warrants additional protective measures. Additional guidance on the use of Ex Equipment in hybrid mixtures (mixture of a flammable gas or vapor with a combustible dust or combustible flyings) is given in GB/T 3836.15. GB/T 3836 does not specify requirements for safety, other than those directly related to the explosion risk. Ignition sources like adiabatic compression, shock waves, exothermic chemical reaction, self-ignition of dust, naked flames and hot gases/liquids, are not addressed by this standard. NOTE 4: Although outside the scope of this standard, such equipment would typically be subjected to a hazard analysis that identifies and lists all of the potential sources of ignition by the equipment and the measures to be applied to prevent them becoming effective. See GB/T 3836.28. This document is supplemented or modified by the following parts and technical specifications: – GB/T 3836.2: Explosive Atmospheres – Part 2: Equipment Protection by Flameproof Enclosure “d”; – GB/T 3836.3: Explosive Atmospheres – Part 3: Equipment Protection by Increased Safety “e”; – GB/T 3836.4: Explosive Atmospheres – Part 4: Equipment Protection by Intrinsic Safety “i”; – GB/T 3836.5: Explosive Atmospheres – Part 5: Equipment Protection by pressurized Enclosure “p”; – GB/T 3836.6: Explosive Atmospheres – Part 6: Equipment Protection by Liquid Immersion “o”; – GB/T 3836.7: Explosive Atmospheres – Part 7: Equipment Protection by Powder Filling “q”; – GB/T 3836.8: Explosive Atmospheres – Part 8: Equipment Protection by Type of Protection “n”; – GB/T 3836.9: Explosive Atmospheres – Part 9: Equipment Protection by Encapsulation “m”; ......


ICS 29.260.20 K35 National Standard of the People's Republic of China Replace GB 3836.1-2000 Explosive Atmospheres- Part 1. Equipment-General Requirements (IEC 60079-0.2007, MOD) ISSUE ON. AUGUST 9, 2010 IMPLEMENTED ON. AUGUST 1, 2011 Issued by General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of the People's Republic of China Contents Scope ... 1 2 Nonnative Reference ... 2 3 Terms and Definitions ... 6 4 Equipment Grouping ... 16 5 Temperatures ... 18 6 Requirements for All Electrical Equipment... 21 7 Non-metallic Enclosures and Non-metallic Parts of Enclosures ... 24 8 Metallic Enclosures and Metallic Parts of Enclosures ... 28 9 Fasteners ... 30 10 Interlocking Devices ... 32 11 Bushings ... 32 12 Materials Used for Cementing ...32 13 Ex Components ... 32 14 Connection Facilities and Termination Compat1ments ... 33 15 Connection Facilities for Earthing or Bonding Conductors ... 34 16 Entries into Enclosures ... 3 5 17 Supplementary Requirements for Rotating Electrical Machines ... 37 18 Supplementary Requirements for Switchgear ... 3 8 19 Supplementary Requirements for Fuses ...39 20 Supplementary Requirements for Plugs, Socket Outlets and Connectors ... 39 21 Supplementary Requirements for Luminaires ...40 22 Supplementary Requirements for Caplights and Handlights ... 42 23 Equipment Incorporating Cells and Batteries ... 42 24 Documentation ... 44 ~5 Compliance of Prototype or Sample with Documents ...44 ~6 Type Tests ... 45 ~7 Routine Tests ... 62 ~8 Manufacturer's Responsibility ... 62 ~9 Marking ... 62 Appendix A (Normative) Supplementary Requirements for Cable Glands ... 75 Appendix B (Normative) Requirements for Ex Components ... 83 Appendix C (Normative) Special Requirements for Group I Electrical Equipment... 86 Appendix D (Normative) Inspection Procedure to Obtain Ce1iificate ... 87 Appendix E (Informative) Introduction of an Alternative Risk Assessment Method Encompassing "Equipment Protection Levels" for Ex Equipment ... 89 Appendix F (Informative) Motors Supplied by Conve1iers ... 94 Appendix G (Informative) Example of Rig for Resistance to Impact Test... 95 Foreword All technical contents of this part are compulsory. GB 3836 "Explosive Atmospheres" is divided into a number ofpaits. - -Part 1. Equipment-General Requirements; --Pait 2. Equipment Protection by Flameproof Enclosures "d"; --Pait 3. Equipment Protection by Increased Safety "e"; --Part 4. Equipment protection by intrinsic safety "i"; --Pait 5. Pressurized Enclosures "p"; --Pait 6. Oil-Immersion "o"; --Part 7. Power Filling "q"; - -Part 8. Type of Protection "n"; --Part 9. Encapsulation "m; --Part 11. Method of Test for Asce1tainment of Maximum Experimental Safe Gap; --Part 12. Classification of Gases or Vapours with Air according to Their Maximum Experimental Safe Gaps and Minimum Igniting Current; --Pait 13. Repair and Overhaul for Apparatus Used in Explosive Gas Atmospheres; --Part 14. Classification of Hazardous Areas; --Patt 15. Electrical Installations in Hazardous Areas (Other than Mines); --Pait 16. Inspection and Maintenance of Electrical Installation (Other than Mines); --Pait 17. Construction and Use of Rooms or Buildings Protected by Pressurization; --Pa1t l 8. Intrinsically Safe System; --Patt 19. Fieldbus intrinsically safe concept (PISCO); --Part 20. Equipment with Equipment Protection Level (EPL) Ga; This pait is part 1 of GB 3 836, identical to IEC 60079-0.2007 "Explosive Atmospheres-Part 0. Equipment-General Requirements" (English Edition). This part is modified in relation to IEC 60079-0.2007. Compared with IEC 60079-0.2007, the main modifications cover. --Add "Note 7. 'Flameproof enclosures' and 'Flameproof type ' in this part of GB 3836 are synonym" in Chapter 1 Scope; - -Add special requirements of Group I electrical equipment, see Appendix C; --Add requirements of Group I handheld or bracket electric drill (and its accessory socket device), portable instrument meter and luminaires enclosure; --Add requirements of painting on interior surface of terminal compartment of metallic group I electrical equipment; --The requirement that relevant provisions of "warning sign" does not applicable to Group I electrical equipment is added in supplementary provisions of switch, fuse and luminaires; --Add time interval between tests of "thermal endurance to heat" and "thermal endurance to cold"; --Add inspection procedure to obtain ce1tificate in Chapter of manufacturer responsibility, see Appendix D; -Change Appendix C (Informative) of IEC standard to Appendix G; change Appendix D (Informative) of IEC standard to Appendix E; change Appendix E (Informative) of IEC standard to AppendixF; --Take relevant contents of No. 1 correction table of IEC 60079-0.2007 into account. This pait replaces GB 3836.1 - 2000 "Electrical Apparatus for Explosive Gas Atmospheres-Pait 1. General Requirements" . Compared with GB 3836.1-2000, the main revised changes covers. --Revise "explosive gas atmospheres" as "explosive atmospheres"; --Merge requirements of explosive dust atmosphere into this pait; --Add Group III (electrical equipment for explosive dust atmosphere) in equipments classification; --Add requirements of ultrasonic energy limit value, electromagnetic radiation energy limit value and "static"; --Add equipment protection level (EPL); --Bring electrical equipment "n" into general requirements, that is to meet the requirements of general requirements first; --Reintroduce environment conditions of equipment application; --Bring product standard cap lamp, intrinsically safe system and resistance-type heating device into this part; --Modify the definitions of symbols "U" and "X" to identify with the existing usage; --Add requirements of ce1tificate in the Chapter of manufacturer responsibility; --Add definitions of ambient temperature and continuous operation temperature (COT); --Add "external source of heating or cooling" as influence factor of atmosphere in Chapter of temperature; --Add requirements for light metal "zirconium" content of enclosure materials with light metal of Group II electrical equipment; Explosive Atmospheres- Part 1. Equipment- General Requirements 1 Scope This pait of GB 3 836 specifies the general requirements for construction, testing and marking of electrical equipment and Ex components intended for use in explosive atmospheres. Unless modified by one of the standards supplementing this standard, electrical equipment complying with this standard is intended for use in hazardous areas in which explosive atmospheres exist under normal atmospheric conditions of Temperature. -2o·c-+60°C ; Pressure. 80kPa-1 l OkPa; Air with normal oxygen content (Volume ratio). 21 %. The application of electrical equipment in atmospheric conditions outside this range requires special consideration and may require additional assessment and testing. Note 1. Although the normal atmospheric conditions above give a temperature range for the atmosphere of-20"C-+60"C , the normal ambient temperature range for the equipment is -20 'C-+40'C, unless otherwise specified and marked, see 5.1.1. Note 2. In designing equipment for operation in explosive atmospheres under conditions other than the atmospheric conditions given above, this standard may be used for guidance. However, additional testing related specifically to the intended conditions of use is recommended. This is particularly important when the types of protection flameproof enclosure "d" (GB 3836.2-2010) and intrinsic safety "i" (GB 3836.4-2010 or GB 12476.4-2010) are applied. Note 3. Requirements given in this standard result from an ignition hazard assessment made on electrical equipment. The ignition sources taken into account are those found associated with this type of equipment, such as hot surfaces, mechanically generated sparks, thermite reactions, electrical arcing and static electric discharge in normal industrial environments. Note 4. It is acknowledged that, with developments in technology, it may be possible to achieve the objectives of the GB 3836 series of standards in respect of explosion prevention by methods that are not yet fully defined. Where a manufacturer wishes to t... ......

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