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GB 3836.20-2010 English PDF

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GB 3836.20-2010: Explosive atmospheres -- Part 20: Equipment with equipment protection level (EPL) Ga
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GB 3836.20-2010English294 Add to Cart 3 days [Need to translate] Explosive atmospheres -- Part 20: Equipment with equipment protection level (EPL) Ga Valid GB 3836.20-2010

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Basic data

Standard ID GB 3836.20-2010 (GB3836.20-2010)
Description (Translated English) Explosive atmospheres -- Part 20: Equipment with equipment protection level (EPL) Ga
Sector / Industry National Standard
Classification of Chinese Standard K35
Classification of International Standard 29.260.20
Word Count Estimation 15,187
Date of Issue 2010-11-10
Date of Implementation 2011-09-01
Quoted Standard GB 3836.1-2010; GB 3836.2-2010; GB 3836.4-2010; GB 3836.9-2006; GB 3836.14-2000; GB 3836.15-2000; GB 4208-2008; GB/T 5169.16-2008; GB 25285.1-2010
Adopted Standard IEC 60079-26-2006, IDT
Regulation (derived from) Announcement of Newly Approved National Standards 2010 No. 8 (No. 163 overall)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard relates to equipment protection level (EPL) Ga -level electrical equipment for the construction, testing and marking of special requirements. In the operating parameters specified by the manufacturer within the scope of a rare equipment failure or when two independent faults, electrical equipment to ensure a high level of protection. This standard also applies to the installation across levels between the two regions have different requirements for the protection of electrical equipment. For example: storage containers containing 0 and its surrounding area identified as an area of ??the border wall with the device. This standard is also suitable for installation in locations requiring a lower level of protection devices, but these devices with Ga -level protection level device is connected electrically (associated equipment).

GB 3836.20-2010: Explosive atmospheres -- Part 20: Equipment with equipment protection level (EPL) Ga


---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.
Explosive atmospheres.Part 20. Equipment with equipment protection level (EPL) Ga ICS 29.260.20 K35 National Standards of People's Republic of China Explosive atmospheres - Part 20. Equipment protection level (EPL) is Ga-level device Explosiveatmospheres-Part 20. Equipmentwith equipmentprotectionlevel (EPL) Ga (IEC 60079-26.2006, IDT) Published 2010-11-10 2011-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued

Table of Contents

Preface Ⅰ 1 Scope 1 2 Normative References 1 2 3 Definitions 4 and structural design requirements 2 5 7 type tests 6 8 logo 7 8 usage information Introduction 9 Annex A (informative) for explosion-proof equipment for risk assessment method "equipment protection level"

Foreword

All technical contents of this section is mandatory. GB 3836 "explosive atmosphere" is divided into several parts. --- Part 1. General requirements for equipment; --- Part 2. a flameproof enclosure "d" protection device; --- Part 3. the increased safety "e" protection device; --- Part 4. Protection by a device intrinsically safe "i"; --- Part 5. shell-type pressurized "p"; --- Part 6. Oil type "o"; --- Part 7. Powder filling "q"; --- Part of 8. "n" electrical equipment; --- Part 9. Encapsulation "m"; --- Part 11. Determination of the maximum experimental safe gap; --- Part 12. a mixture of gases or vapors according to their maximum experimental safe gaps and minimum ignition current rating; --- Part 13. Electrical Apparatus for Explosive Gas Atmospheres maintenance; Section --- 14. Classification of hazardous areas; --- Part 15. Electrical installation hazardous areas (other than mines); --- Part 16. Inspection and maintenance of the electrical device (other than mines); --- part 17. Construction and use of positive pressure rooms or buildings; --- part 18. intrinsically safe system; --- Part 19. Field bus Intrinsically Safe Concept (FISCO); --- Part 20. Equipment Protection Level (EPL) is Ga-level device. This section GB 3836 Part 20, corresponding to the IEC 60079-26.2006 "Explosive atmospheres Part 26. Equipment Protection Level Do (EPL) is Ga-level device "(in English). This portion is equivalent to IEC 60079-26 consistency use, editorial changes are made. GB 3836.1 standard reference repair Change using IEC 60079-0.2007, and adds "Note. according to GB 3836.1-2010 Chapter 29 corresponding provisions" in 6.1. Appendix A of this section is an informative annex. This section was proposed by China Electrical Equipment Industrial Association. This part of the jurisdiction of the National Standardization Technical Committee explosion-proof electrical equipment (SAC/TC9). This part was drafted. Nanyang explosion-proof electrical Institute. This part of the main participants. National explosion-proof electrical products for Quality Supervision and Inspection Center, Shenzhen Ocean King Investment Development Co., Ltd., China Group Limited, a record blast Electric Co., Ltd. This part of the main drafters. Zhang Gang, Li Shu North Korea, Li Xiaoning, Zhou Jing, Liu Qi Ying, Huang Jianfeng. Explosive atmospheres - Part 20. Equipment protection level (EPL) is Ga-level device

1 Scope

GB This part 3836 specifies the apparatus protection level (EPL) for the special requirements of level Ga, testing and marking of electrical equipment. Within a predetermined range of operating parameters of the manufacturer, when a device failure or a rare two mutually independent failure, to ensure electrical device having a very High level of protection. Note 1. The fault may be caused by external influences or damage to electrical equipment parts foreseeable. When two independent faults occur frequently, although not individually produced Ignition risk, but at the same time was able to produce a potential ignition hazard appears, it should be regarded as a rare failure when two independent faults occur simultaneously. Note 2. Electrical equipment intended for use in such hazardous locations 0, dangerous place by the air under normal atmospheric conditions - forming gas, vapor or mist mixture Explosive Gas Atmospheres continuous, long or frequent presence. This also applies to the mounting portion spanning between the two areas have different requirements on the level of protection of electrical equipment. For example. a storage vessel containing 0 and its surrounding area is determined as a boundary wall of an equipment area. This portion is also suitable for installation in spaces requiring a lower level of protection devices, but these devices and apparatus protection level Ga electrical grade Connection (associated device) on the air. This section is in addition to general requirements GB 3836.1-2010 and GB 3836 series of special type of protection standards by taking These standards provide a level of security so as to achieve EPLGa level of protection required. Note 3. When designing an explosive environment exceeds a predetermined GB 3836.1-2010 equipment atmospheric conditions, this section may be used as a guide. However, we recommend Additional tests associated with the predetermined use conditions. When a device (GB 3836.2-2010) from the flameproof enclosure "d" and by the intrinsic safety protection When type "i" devices (GB 3836.4-2010) protection, which is especially important. Note 4. The definition of hazardous area classification, see GB 3836.14-2000. NOTE 5. This section does not mention other non-electrical ignition sources may occur (e.g., ultrasound, light or ionizing radiation), which should be considered a source of ignition (See GB 25285.1-2010). Note 6. The method of this concept i.e. Ga stage apparatus protection level (EPL), details given in Appendix A.

2 Normative references

Terms of the following documents constitute provisions of this section by reference in this section 3836 of the GB . For dated references, All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encouraged to reach an agreement under this section Whether the parties to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB 3836.1-2010 explosive atmospheres - Part 1. General requirements for equipment (IEC 60079-0.2007, MOD) GB 3836.2-2010 explosive atmospheres - Part 2. the device by a flameproof enclosure "d" protected (IEC 60079-1.2007, MOD) GB 3836.4-2010 explosive atmospheres - Part 4. equipment from the intrinsically safe "i" protection (IEC 60079-11.2006, MOD) GB 3836.9-2006 explosive gas atmosphere electrical equipment Part 9. Encapsulation "m" (IEC 60079-18.2004, IDT) GB 3836.14-2000 explosive gas atmospheres electrical equipment - Part 14. Classification of hazardous areas (eqvIEC 60079-10. 1996) GB 3836.15-2000 explosive gas atmospheres electrical equipment - Part 15. Hazardous areas electrical installation (except mine) (EqvIEC 60079-14.1996) GB 4208-2008 shell protection (IP code) (IEC 60529.2001, IDT) GB/T 5169.16-2008 Fire hazard testing for electric and electronic products - Part 16. 50W horizontal and vertical flame test fire Flame test methods (IEC 60695-11-10.2003, IDT) GB 25285.1-2010 explosive atmospheres explosion prevention and protection - Part 1. Basic Principles and Methods

3 Terms and Definitions

Except that the outer part of the present terms and definitions given in GB 3836.1-2010 following abbreviations are also used. Note. Other definitions applicable to explosive atmospheres can be found GB/T 2900.35. 3.1 EPL equipmentprotectionlevel (equipment protection level) abbreviation, as defined in Appendix A.

4 Design and construction requirements

4.1 General Equipment shall meet the requirements of 4.2 pairs of circuits and 4.3 to 4.6 dangerous demands on the mechanical and electrostatic ignition. 4.2 protective measures to prevent the risk of ignition circuit 4.2.1 Overview Electrical equipment should meet one of the following requirements. a) the use of a single type of protection to consider protective measures two independent faults occur, should meet the requirements of 4.2.2 or 4.2.3; b) one device protection measures fail, the need for a second independent protective measures shall comply with the requirements of 4.2.4 or 4.2.5. Requirements in the equipment installed in places EPLGa stage which electrical connections and permanent connection cable section shall comply with the same level of protection Other requirements, for example. Ex circuit comprising a non Exia "e" of cable, additional flameproof catheter protector, or Ex "e" provide a grounding cable Leakage Protection. Note 1. GB 3836.15-2000 EPLGa level required to achieve the non-intrinsically safe circuit cables and installation requirements detailed rules. Note 2. Since the voltage Ping Heng fault in the system and/or ignition hazard can produce transient loop, preferably compliant devices 4.2.2,4.2.3 and 4.2.4 The power and signal connections electrically isolated. Should consider using electrical protection device, such as a high sensitivity earth leakage monitor, the potential Ping Heng Screening Impact of transient fault currents in the network to a minimum. 4.2.2 The only adopt measures of protection intrinsically safe EPLGa level required to achieve intrinsically safe electrical equipment and access requirements EPLGa stage properties intrinsically safe circuits associated device should meet Requires co-GB 3836.4 intrinsically safe "ia" level. Note. in line with the provisions of GB 3836.4-2010 intrinsically safe "ib" level protection can be regarded as one of two separate methods in line with the provisions in 4.2.4. 4.2.3 The only adopt measures of protection Encapsulation EPLGa achieve the required level encapsulation type electrical equipment shall comply with the requirements of GB 3836.9-2006 Encapsulation "ma" level. Note. in line with the provisions of GB 3836.9-2006 of Encapsulation "mb" level can be considered as one of two independent protection methods in line with the provisions in 4.2.4. Measures 4.2.4 with two separate types of protection EPLGb level of protection Electrical equipment should meet the level reached two separate EPLGb type of protection required. If A blast-type failure, another Type of protection should continue to function. Independent of each other except for the type of protection should not have a common mode failure, Chapter otherwise specified. Typical examples of common mode failures with internal arcing contacts Ex "d" type housing used in Ex "e" enclosure, if Ex "d" type external Shell damaged, the arc within the housing will also jeopardize Ex "e" enclosure. Note. EPLGb reach level two separate types of protection superimposing repeatedly advised depending on the physical protection principles. For example, Ex "d" and Ex "q" two superimposed Actors are avoiding flame propagation, added together is not suitable for use. In practice, some type overlay may not apply, such as the type of oil Sand filled and stacked together. If you are using two separate types of protection overlay, then respond to each type of protection were tested (see 5.1). Should use two types of protection in the most unfavorable fault conditions for both types of protection were assessed. If intrinsically safe "ib" level With another type of protection is superimposed, is applied to the most unfavorable with fault condition on the intrinsically safe circuit to another type of protection were assessed. If two types of protection, and with the same parameters (e.g., after Ex "ib" Ex level Gb and "e" is superimposed creepage distance), It should be conforming to two types of protection specified in the strictest. If both types of protection are superimposed on the use of protective shell, you should meet one of the following requirements. a) If the two housings (a housing fully housed in the other housing), each housing a respective type of protection should meet the requirements; b) If only one housing, the housing and the cable entry should be in accordance with GB 3836.1-2010 predetermined 26.4.2 Class Ⅰ predetermined electrical equipment impact test value. Superimposing two kinds of sample stage independently Gb type of protection as follows. --- intrinsically safe "ib" level inductive transmitter (e.g., a proximity switch, a limit sensor), the "mb" encapsulation type; connection To intrinsically safe "ib" level of the circuit element may be connected Gb class increased safety "e" protection; --- lamp made Gb class increased safety "e" (Gb grade), with a switch circuit which is made intrinsically safe "ib", and then into the spacer elements Blasting enclosure "d" in; "D" intrinsically safe explosion-proof housing with --- "ib" level measuring sensor; --- intrinsically safe "ib" level circuit device, with additional sand filling "q" protection; --- solenoid valve Encapsulation "mb" level, the charged flameproof enclosure "d"; --- with "px" stage pressurized housing Gb increased safety "e". 4.2.5 EPLGb with a level consistent with the type of protection and isolation component protection measures 4.2.5.1 General If the device is installed in place in claim EPLGa stage or a portion of the boundary wall forming a boundary wall, the device comprising a circuit if not Protection level Ga compliance requirements, the device should meet at least one kind EPLGb achieve the required type of protection level, while the device should be installed Mechanical spacer member, a part of the device as a circuit device isolation stage and place EPLGa requirements. If the type of protection fails, the spacer member should meet the following requirements. a) prevent the flame from passing through the device level required EPLGa place; b) maintaining its safety performance; c) after being heated, the temperature does not exceed the temperature of the device group. A separator consisting of spacer member may be combined with a flameproof joint with natural ventilation or air. 4.2.5.2 partition Spacer should be made of the following materials. a) a corrosion resistant metal file specified by the manufacturer, glass or ceramic; or b) other materials, if they can prove with the same level of safety. In this case, it should be used in line with GB 3836.1-2010 29.2 The provisions of "X" signs or warning signs, and the proof certificate shall indicate the materials used and the materials thermal and mechanical Properties, so that the user can confirm a material suitable for the specific use. If the wall thickness of the separator is less than 1mm, the device shall be as specified in GB 3836.1-2010 29.2 glyph "X" or warnings Signs, safety materials indicate the use of special conditions, materials can not withstand the possible adverse effects of environmental conditions on the bulkhead. If the partition is Under constant vibration stress (e.g., diaphragm), it should be a minimum fatigue limit at a predetermined maximum amplitude in the file. Note 1. partition wall thickness of less than 1mm and is limited to intrinsically safe "ib" when the level of natural ventilation proof joints or joint together, see 4.2.5.3. NOTE 2. For a glass or a ceramic separator, the thickness of the recommended minimum diameter (or largest dimension) but not less than 1/10 of 1mm. 4.2.5.1 ~ 4.2.5.3 Except as provided, the thickness of the metal separator can be configured suitable ≥1mm conductor insulating sleeve (see FIG. 1). In order to avoid the critical concentration of the explosive atmosphere from the diffusion properties requirements EPLGa stage into the housing containing the circuit, by an insulating sleeve Leak rate into the atmosphere should be lower than the leakage rate from the housing. This is can be done, for example, the use of glass shown in FIG. Glass fibers or ceramic insulating sleeve. NOTE 3. 4208-2008 conforming to GB standard IP67 protection housing having qualified insulating sleeve is a leak rate corresponding to a differential pressure Less than 105Pa 10-2Pa × l/s of helium leak rate. FIG 1 with a separator exemplary hermetically conductor bushing 4.2.5.3 requirements for different thickness of the separator Isolating binding member and the additional protective measures depend on the partition wall thickness "t", the requirements of the thickness of the separator is as follows, and shown in Table 1. I) For a homogeneous thickness of the separator is ≥3mm, no additional protective measures. Ii) The thickness of the separator between the homogeneous 1mm≤t 3mm < , one kind of type of protection required EPLGb level (shown in Table 1 Example a)). A housing with EPLGb grade explosion-proof apparatus, even if the housing to meet the requirements of the type of protection, as long as the device contains no dot Fuel source, e.g., exposed contacts (see Example 1 A)), which may also act as a separator member homogeneous effect. If the normal operation of the belt There ignition source, the required additional flameproof joint (Table 1, Example b)) or a ventilation air gap (c 1 in the example of Table)). Iii) If the thickness of the separator 0.2mm≤t < between 1mm, requires one of the following protective measures behind. --- GB 3836.4-2010 meet intrinsically safe requirements "ib" type of protection (see Example 1 a)); or --- an explosion-proof type and composition stages EPLGb flameproof joint (see Example 1 b)); or --- an explosion-proof type EPLGb stages in combination with ventilation and flameproof joint gap (see the example of c 1)). Iv) If the separator thickness t < 0.2mm (e.g., film), is required to adopt a EPLGb level and type of protection flameproof contact Engagement surface composition (see Table 1, Example b)). If the ignition source with the normal operation of the device, the further venting gap required (see Table 1 Example c)). Note. In this section, "homogeneous" means that the term without any insert (e.g., cable, bushing) separators composed of a single piece of material. Table 1 spacer member structure type Different spacer thickness "t" required Ⅰ) t≥3mm. No additional requirements Ⅱ) 1mm≤t < 3mm Ⅲ) 0.2mm≤t < 1mm (Requirements "X" sign) Ⅳ) t < 0.2mm (Requirements "X" sign) a) partition EPLGb level of explosion The types and normal operation No ignition source (for example, no Exposed contacts) Intrinsically safe "ib" level does not permit TABLE 1 (cont.) structure type Different spacer thickness "t" required Ⅰ) t≥3mm. No additional requirements Ⅱ) 1mm≤t < 3mm Ⅲ) 0.2mm≤t < 1mm (Requirements "X" sign) Ⅳ) t < 0.2mm (Requirements "X" sign) b) partition joints EPLGb level types of protection EPLGb level of explosion The types and normal operation No ignition source (for example, no Exposed contacts) c) ventilated air gap baffle EPLGb level types of protection EPLGb level and type of protection flameproof joint (dotted line Office) and a flameproof joint exchangeable spacer sequence. 4.2.5.4 combined with flameproof joint separator Attached to the joint surface of the separator shall meet the following requirements. a) the requirements GB 3836.2-2010; or Note 1. To determine the characteristics of the joint surface, should be considered net volume of the housing containing the circuit. b) able to demonstrate that the item a) the structure of the same security level. Note 2. for example, pressed into a cylindrical metal bushing Teflon casing length not less than 40mm. Permanent compressed length of at least 17mm The joining surfaces are also suitable (e.g., an elastic compression bushing conical PTFE). Non-metallic spacer member should meet the requirements of GB/T 5169.16-2008 flammability rating of V-0, and having the same chemical resistance Properties, e.g., a glass-like oil is used, ceramics, polytetrafluoroethylene, or non-recovering an epoxy resin. Material and its mechanical spacer member And thermal stress limits should be clearly defined in the document, in order to ensure that users confirm its suitability for particular conditions of use. 4.2.5.5 natural ventilation gap with the belt binding separator Ventilation should ensure the case under the most adverse operating conditions specified by the manufacturer and is expected to prevent the leakage of flammable materials in the device poly set. If all ≥10mm air gap length and around at least 50% of the effective ventilation holes, the ventilation natural ventilation , Vapor and mist are valid. In addition to the provisions of 4.2.5.1 ~ 4.2.5.3 may be used ≥1mm thickness, and having an air gap suitable metal Separator, such as compliance cylindrical shaft GB 3836.2-2010 required flameproof joint, shown in Figure 2. In this case, the ventilation air gap Should be equal to the minimum length of 10mm diameter or shaft length, whichever is greater. a sufficient ventilation required. Note 1. a cylindrical shaft inside the separator 2 shown in FIG bonding additional bonding is not described in 4.2.5.4. Note 2. The electrical equipment should choose the appropriate gas group. FIG 2 with a spacer member exemplary cylindrical shaft engaging surface and natural ventilation 4.3 with a movable member of the apparatus 4.3.1 frictional heat If the device has a movable member, at normal operating or fault condition of the heat generated by friction likely increases in temperature, the determined maximum Surface temperature should be considered. 4.3.2 damage failure caused by moving parts When the active component fails, it should not adversely affect the type of protection. 4.3.3 light metal From a light metal or an alloy thereof (see content limits GB 3836.1-2010) apparatus and equipment member made of a member made of an iron/steel Inter does not allow a run-friction or impact. Between two light metal allows the production running friction or collision. Note. light metals such as aluminum, magnesium, titanium or zirconium. 4.4 insulated conductive member Insulated conductive member to respond to the device surface equipotential bonding, but according to GB 3836.1-2010 electrification test procedure can permit Ming electrification member except when not lit up level. 4.5 accessible non-conductive housing and a non-conductive member 4.5.1 General Measures should be taken to ensure that electrostatic discharge ignition risk reduced to a negligible level, particularly due to the level of equipment to achieve EPLGa Can be used directly, it may be a non-conductive surface due to the flow of non-conducting medium (e.g., in a stirred vessel or pipe) electrically sky. Therefore, the electrification of the accessible surface of the device should meet the following requirements or regulations one GB in 7.4 3836.1-2010. a) a non-conductive surfaces may serve to limit the size of the electrical, section 4.5.2; b) limit from electrically non-conductive layer thickness, see 4.5.3; c) take measures to protect the conductive coating, see 4.5.4. If you do not meet these requirements, you should use the line with "X" signs or warning signs GB 3836.1-2010 prescribed in 29.2, and Proof certificate shall contain special conditions for safe use, allowing users to determine the equipment for specific conditions of use. 4.5.2 may be electrically non-conductive surface from size limitations Since the non-conductive surface may be electrically projecting size not greater than a predetermined level value EPLGa Table 6 GB 3836.1-2010. in case A long bar member (e.g., plastic pipes, bars or the insulating plastic rope; GB 3836.1-201016.6 but the cable may be predetermined) with a non-conductive Surface, its length is not limited, but the diameter or width must not exceed the following values. a) For ⅡA ⅡB class equipment and 3mm; b) For class equipment ⅡC 1mm. 4.5.3 may serve to limit the thickness of electrically non-conductive layer If the non-conductive layer covers the equipotential bonding conductive surface, the thickness of which should not exceed the following values. a) For ⅡA, ⅡB class device is 2mm; b) For class equipment ⅡC 0.2mm. The conductive surface of the adhesive may be made of metal mesh, mesh area in compliance with the provisions of 6 GB 3836.1-2010 EPLGa level table. Shielded cable has a protective layer may be used. Note 1. Note 2. It is noted that when using high electrification means may generate a spread-shaped brush discharges. Conductive coating of protective measures 4.5.4 A non-conductive surface may be covered with a conductive coating of permanent adhesive. Resistance between the coating and the adhesive points must not exceed 1GΩ. Resistance measurements shall be specified in GB 3836.1-201...

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