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1、GOST R 51330.1-99 (IEC 60079-1-98) S T A T E S T A N D A R D O F T H E R U S S I A N F E D E R A T I O N EXPLOSION-PROOF ELECTRIC EQUIPMENT Part 1 Explosion protection using explosion-tight enclosures Official Edition English Version Approved by Interstandard GOSSTANDART OF RUSSIA Moscow 51330.1-99
2、II Foreword 1 DEVELOPED by Noncommercial Independent Research Organization “the Center for ertification of Explosion-Proof and Mine Electric Equipment IGD“ (NIRO “ “) and the Test Center for Explosion-Proof and Mine Electric Equipment VostNII (TC ) SUBMITTED by Technical Committee for standardizatio
3、n TK 403 “Explosion-proof and mine electric equipment“ 2 APPROVED AND INTRODUCED by Decree No. 492-, dated 09.12.99, of Gosstandart of Russia. 3 This Standard contains authentic text of International Standard IEC 60079-1-98 Explosion- proof electric equipment. Part 1. Explosion protection using expl
4、osion-tight enclosures except for clauses 3.4, from 3.9 to 3.12, from 3.19 to 3.21, 9.2, 9.3, from 10.6 to 10.8, 12.2, from 14.1 to 14.3, 15.1, 15.2, 15.4.9, 15.5.1.3, 15.5.1.4, 15.7.1.3, 15.7.2, 16.3, 16.4 and Appendices from B to G. 4 INTRODUCED FOR THE FIRST TIME Standards Publishing House, 2000
5、This Standard may not be reproduced, in full or in part, reprinted or distributed as an official publication in the territory of the Russian Federation without the permission of Gosstandart of Russia. -,-,- 51330.1-99 III Contents 1 Scope 1 2 Normative references .1 I General provisions 2 3 Definiti
6、ons 2 4 Classification 3 II Technical requirements 4 5 Explosion-tight connections .4 6 Control rods and rollers 10 7 Shafts and bearing shields of rotating electric machines .10 8 Light-transmitting elements .11 9 Ventilation devices, unloading devices, and drain devices 12 10 Fastening components
7、13 11 Mechanical strength of enclosures .14 12 Enclosure inputs of wires and cables .14 13 Marking 16 III Test methods .17 14 General provisions.17 15 Check and test of enclosures 18 16 Test of enclosures carried out by manufacturer of electric equipment 23 Appendix A Nonmetal explosion-tight enclos
8、ures and their components 24 Appendix B Ventilation devices and unloading devices of the Group 1 electric equipment 26 Appendix C Dust-protection test of external unloading devices of the Group 1 electric equipment 28 Appendix D Explosion-proof metal-cage enclosures of gas-control sensors.29 Appendi
9、x E Test of metal-cage enclosures intended for gas-control sensors 30 Appendix F Test bench for testing explosion protection of electric equipment using explosion- tight enclosures 32 Appendix G Recommendations for hydraulic test of explosion-tight enclosures and their components 33 -,-,- 51330.1-99
10、 IV Introduction This Standard is a part of the complex of state standards for explosion-proof electric equipment, developed by Technical committee TK 403 “Explosion-proof and mine electric equipment“ on the basis of IEC International standards for explosion-proof electric equipment. This Standard i
11、ncludes requirements of International standard IEC 60079-1-98. It contains provisions that specify different clauses of the IEC Standard taking into account working national practice, technical norms and requirements of state standards. Additional requirements, that specify the needs of national eco
12、nomy, are italicized. This Standard preserves a number of working terms. Section “Test methods“ specifies the check procedure for enclosure compliance with technical documentation, includes evaluation of samples and all test types, references to corresponding technical documentation and specificatio
13、ns of required test methods. This Section specifies test of small enclosures in details. This Standard preserves working national technical norms, contains test specifications for ventilation devices and unloading devices of mine electric equipment and explosion-proof metal-cage enclosures of gas-co
14、ntrol sensors, specifications for test benches intended for testing explosion-protection of electric equipment arranged within explosion-tight enclosures. Moreover, this Standard contains recommendations for hydraulic test intended for explosion-tight enclosures and their components. Static-test pre
15、ssure values are used for explosion-protection test of explosion-tight enclosures. -,-,- 51330.1-99 1 S T A T E S T A N D A R D O F T H E R U S S I A N F E D E R A T I O N EXPLOSION-PROOF ELECTRIC EQUIPMENT Part 1 Explosion protection using explosion-tight enclosures Date of Introduction 2001-01-01
16、1 Scope This Standard applies to the Group I (Group II) explosion-proof electric equipment protected using explosion-tight enclosures. This equipment is intended for operation in explosive gas-air (vapor-air) mixes. It establishes technical requirements and test methods for this type of electric equ
17、ipment. Explosion-proof electric equipment protected using explosion-tight enclosures shall comply with GOST R 51330.0. This Standard applies to explosion-tight enclosures and their components made of both metal and nonmetal materials. Additional requirements for nonmetal enclosures and their compon
18、ents are specified in Appendix A. This Standard provides explosion protection of electric equipment arranged in explosive-mix medium at a temperature from 20 to +60 . The environment temperature below 20 may require stronger enclosures, because low temperature may increase explosion pressure and wor
19、sen mechanical properties of the enclosure. The environment temperature exceeding 60 may require width reduction of explosion-tight connections, because safe experimental maximum clearance width reduces together with increase of explosive- mix temperature. Requirements of this Standard are obligator
20、y. 2 Normative references The following standards are referred to in this Standard: GOST 3187-76 Woven wire filter cages. Specifications GOST 6613-86 Woven wire square-cell cages. Specifications GOST 9833-73 Rubber round-section sealing rings for hydraulic and pneumatic devices. Design and dimension
21、s GOST 10178-85 Portland cement and Portland slag cement. Specifications GOST 14254-96 (IEC 529-89) Protection degrees provided by enclosures (IP codes) GOST 18829-73 Rubber round-section sealing rings for hydraulic and pneumatic devices. Specifications GOST 20403-75 Rubber. Determination of hardnes
22、s in international units (from 30 to 100 IRHD) GOST 21207-81 Plastics. Determination of flammability GOST 25142-82 Surface roughness. Terms and definitions Official Edition -,-,- 51330.1-99 2 GOST R 51330.0-99 (IEC 60079-0-98) Explosion-proof electric equipment. Part 0. General requirements GOST R 5
23、1330.11-99 (IEC 60079-12-78) Explosion-proof electric equipment. Part 12. Classification of gas-air (vapor-air) mixes using safe experimental maximum clearance width and minimum igniting currents GOST R 51330.20-99 (IEC 60079-20-99) Mine electric equipment. Insulation, leakage paths and electric cle
24、arances. Technical requirements and test methods I GENERAL PROVISIONS 3 Definitions The following terms and corresponding definitions are used in this Standard: 3.1 explosion-tight enclosure: type of explosion protection of electric equipment (the parts of equipment, that may ignite explosive gas-ai
25、r mix, are arranged within the enclosures strong enough to stand explosion pressure of ignited mix without damage, the enclosures do not transmit ignition into the surrounding explosive media). N o t e Explosion protection of this type is designated by the letter “d“. 3.2 free volume of the enclosur
26、e (its section) V: internal volume of the enclosure (its section) minus the volume occupied by built-in elements. N o t e Free volume of light devices shall be determined without lamp volume taken into account. 3.3 explosion-tight connection: connection of enclosure parts, it guarantees that explosi
27、on within the enclosure does not go out through the clearance into the surrounding explosive media with the established safety factor. 3.4 clearance length L: the shortest way along the explosion-proof surface from within the enclosure into the surrounding media (from one section to another in the a
28、rea where bolt holes or holes of other fastening elements are not available). 3.5 clearance width: distance between corresponding surfaces of the given explosion-tight connection. Clearance width of cylindrical surfaces is equal to their diametral clearance (diameter difference). 3.6 shaft: round cr
29、oss-section component transmitting rotary motion. 3.7 control rod (roller): round cross-section component transmitting control motion (rotary motion, translation or both). 3.8 increase of initial pressure of explosive mix: increase of initial pressure of explosive mix in the chamber (enclosure secti
30、on) caused by mix explosion in the adjacent chamber (enclosure section). 3.9 explosion-tight enclosure section: section made by explosion-proof partitions within the enclosure. 3.10 explosion-tight enclosure chamber: chamber made by nonexplosion-proof partitions within the enclosure. 3.11 surface of
31、 explosion protection: enclosure surface that together with the adjacent surface provides the required clearance of the explosion-tight connection. 3.12 external explosion-tight connection: explosion-tight connection, its clearance connects the internal part of the section (enclosure) and the enviro
32、nment. 3.13 internal explosion-tight connection: explosion-tight connection, its clearance connects one explosion-proof section and the other. 3.14 external enclosure part: a enclosure part, products of explosion may get directly into the environment in case of its damage. 3.15 internal enclosure pa
33、rt: a enclosure part, products of explosion may get from one explosion-proof section into another in case of its damage. -,-,- 51330.1-99 3 3.16 width of radial clearance: distance between the hole surface and the shaft surface in the cylindrical connection. 3.17 clearance length to the hole l: the
34、shortest way along the explosion-proof surface from within the enclosure into the environment (from within one section into another) in the area where bolt holes or holes of other fastening elements are available. 3.18 parameters of explosion-tight connections: clearance width (length) providing exp
35、losion protection of enclosures with the established safety factor. 3.19 movable connection of enclosure parts: connection of explosion-protection surfaces, operating under condition that at least one of their parts is in the state of constant (periodical) motion when electric equipment is switched
36、on (for example, connection of electric-motor shafts and bearing shields, connection of control rollers and bushings in the enclosure wall). 3.20 permanent connection of enclosure parts: connection of explosion-protection surfaces, operating under condition that their parts do not move when electric
37、 equipment is switched on (for example, connection of the enclosure lid and the enclosure casing). 3.21 attended enclosure section: enclosure section containing parts of electric equipment that require periodic check and adjustment. 3.22 test pressure: pressure established by this Standard, it is us
38、ed for explosion-protection test of enclosures (their components). 3.23 explosion protection of enclosures: enclosure ability to resist pressure of explosive-mix explosion under condition that explosion-protection devices remain intact. 3.24 direct input: input of cables (wires) directly into the ex
39、plosion-tight enclosure containing electric devices. 3.25 intermediate input: input of cables (wires) into the leading explosion-tight enclosure section, divided by the explosion-proof partition (containg bushing insulators from electric devices of another section). 3.26 insulating socket: bushing i
40、nsulator installed in the explosion-proof partition (a wall of an explosion-tight enclosure) with more than one current-carrying stud. 3.27 flat explosion-tight connection: connection of parts of the explosion-tight enclosure. Clearance of this connection is arranged between flat explosion-proof sur
41、faces. 3.28 cylindrical explosion-tight connection: connection of parts of the explosion-tight enclosure. Clearance of this connection is arranged between cylindrical explosion-proof surfaces. 3.29 flat-and-cylindrical explosion-tight connection: connection of parts of the explosion-tight enclosure.
42、 Clearance of this connection is arranged between partially flat and partially cylindrical explosion-proof surfaces. 3.30 thread explosion-tight connection: connection of parts of the explosion-tight enclosure. Clearance of this connection is arranged between thread explosion-proof surfaces. 4 Class
43、ification Classification of explosion-proof electric equipment using Groups and temperature classes, established in GOST R 51330.0, shall be applied also to electric equipment providing explosion protection using explosion-tight enclosures. Explosion-proof electric equipment is subdivided into the f
44、ollowing two Groups: Group I is mine explosion-proof electric equipment intended for underground (surface) mine facilities containing hazardous firedamp (combustible dust); Group II is explosion-proof electric equipment intended for internal (external) installation. It may be used in potentially exp
45、losive media, except for underground (surface) mine facilities containing hazardous firedamp (combustible dust). Mine electric equipment, intended for operation in the atmosphere containing methane and significant quantities of other combustible gases, shall be designed and tested in compliance with
46、 the Group I requirements as well as with the subGroup II requirements corresponding to the explosive category of the given firedamp. The Group II electric equipment is subdivided into subGroups II, II, II depending on category of the given explosive mix. -,-,- 51330.1-99 4 II TECHNICAL REQUIREMENTS
47、 5 Explosion-tight connections 5.1 General requirements Parameters of all explosion-tight connections in the absence of overpressure shall comply with tables from 1 to 5 and the following Notes. N o t e s 1 It is allowed to use special connections: labyrinth connections (figure 1), gear connections
48、(figure 2). Design and test requirements for these connections are not specified in this Standard. Corresponding test method may differ from the standard one, it is determined by the test organization. 2 Explosion-proof surfaces of explosion-tight connections shall be protected from corrosion (for example, using consistent grease, galvanic coating or chemical processing). It is not allowed to use paint and varnish for coating explosion-proof surfaces. 5.2 Non-thread connections 5.2.1 Connection length Connection length shall be no l