1 Scope
1.1 This Standard specifies the general requirements and inspection procedures for the design, inspection and marking of electrical apparatus, Ex cable entry and Ex component for explosive gas atmospheres [1].
1.2 This Standard is supplemented or modified with the following special standards for the types of protection for electrical apparatuses.
GB 3836.2 Electrical apparatus for explosive gas atmospheres -
Part 2: Flameproof type “d”
GB 3836.3 Electrical apparatus for explosive gas atmospheres -
Part 3: Increased safety type “e”
GB 3836.4 Electrical apparatus for explosive gas atmospheres -
Part 4: Intrinsic safe type “i”
GB 3836.5 Electrical apparatus for explosive gas atmospheres -
Part 5:Positive Pressure type “p”
GB 3836.6 Electrical apparatus for explosive gas atmospheres -
Part 6: Oil-Filled type “o”
GB 3836.7 Electrical apparatus for explosive gas atmospheres -
Part 7: Sand-filled type “q”
2 Normative quotation
The clauses contained in the following standards constitute the provisions of this Standard with the references are made in this Standard. When this Standard is published, all the indicated editions are valid. All standards are subject to revisions, and all parties who apply this Standard shall explore the possibilities to use the latest editions of the following standards:
GB/T 70 - 1985 Hexagon socket cap head screws (eqv ISO 4762:1977)
GB/T 77 - 1985 Hexagon socket set screws with flat point (eqv ISO 4026:1977)
GB/T 78 - 1985 Hexagon socket set screws with cone point (eqv ISO 4027:1977)
GB/T 79 - 1985 Hexagon socket set screws with dog point (eqv ISO 4028:1977)
GB/T 80 - 1985 Hexagon socket set screws with cup point (eqv ISO 4029:1977)
GB/T 2423.4-1993 Basic environmental testing procedures for electric and electronic products -Test DB: Damp heat, cyclic (eqv IEC 60068-2-30:1980)
GB 3836.11-1991 Electrical apparatus for explosive atmospheres - Method of test for ascertainment of maximum experimental safe gap (eqv IEC 60079- 1A:1975)
GB 3836.12-1991 Electrical apparatus for explosive atmospheres - Classification of gases or vapors with air according to their maximum experimental safe gaps and minimum igniting currents (eqv IEC 60079 - 12:1978)
GB 4208 -1993 Degree of Protection provided by enclosure (IP Code) (eqv IEC 60529:1989)
GB/T 4942.1-1985 Classification of degrees of protection provided by enclosures for rotating machines (eqv IEC 60034 - 5:1981)
GB/T 5277-1985 Fasteners - Clearance holes for bolts and screws (eqv ISO 273:1979)
GB/T 5782-1986 Hexagon head bolts - Product Grades A and B (eqv ISO 4014:1979)
GB/T 5783-1986 Hexagon head bolts - Full-thread - Product Grades A and B (eqv ISO 4017:1979)
GB/T 6031-1998 Rubber, vulcanized or thermoplastic - Determination of hardness (30 ~ 85 IRHD) (idt ISO 48:1994)
GB/T 6170-1986 Hexagon nuts, Style 1 – Product Grades A and B (eqv ISO 4032:1979)
GB/T 7957-1987 Safety cap lamp for mines
GB/T 9145-1988 General purpose screw threads - Limits of sizes for commercial bolt and nut threads – Medium quality (eqv ISO 965/2:1980)
GB/T 9341-1988 Plastic - Determination of flexural properties of rigid plastic s (eqv ISO 178:1975)
GB/T 11020-1989 Test methods for the determination of the flammability of solid electrical insulating materials when exposed to an igniting source (eqv IEC 707:1981)
GB/T 11026.1-1989 Guide for the determination of thermal endurance properties of electrical insulating materials - General guidelines for ageing procedures and evaluation of test results (eqv IEC 60216-1:1987)
GB 13813-1992 Testing method and judging rule of safety to friction spark of metallic material for coal mines
JB/T 7192-1995 Selectable series of general purpose screw threads for commercial bolts and nuts
IEC 60079—4:1975 Electrical apparatus for explosive atmospheres - Part 4: Test method for determination of ignition temperature
IEC 60192: 1973 Low voltage sodium lamp
IEC 60216—2:1990 Guideline for determination of heat endurance property for electrical insulating materials - Part 2: Selection of testing and judging criteria
IEC 60662: 1980 High voltage sodium lamp
IEC 60947 —1:1996 Low voltage switch and controller - Part 1: General Procedures
ISO 179:1993 Plastic - Method for determination of pendulum impact test strength for rigid plastic
ISO 286-2:1988 ISO system of tolerance and fitting-up - Part 2: Table of standard tolerance grade and tolerance limits for holes and shafts
ISO 527-2:1993 Plastics - Determination of tensile properties Part 2: Formed plastics and molded plastics
ISO 1817:1985 Vulcanized rubber - Determination of effect of liquid
ISO 4892-1:1994 Plastics - Test method of exposure to laboratory light source
3 Definitions and Symbols
The clauses contained in the following standards constitute the provisions of this Standard with the references are made in this Standard. When this Standard is published, all the indicated editions are valid. All standards are subject to revisions, and all parties who apply this Standard shall explore the possibilities to use the latest editions of the following standards:
GB/T 70 - 1985 Hexagon socket cap head screws (eqv ISO 4762:1977)
GB/T 77 - 1985 Hexagon socket set screws with flat point (eqv ISO 4026:1977)
GB/T 78 - 1985 Hexagon socket set screws with cone point (eqv ISO 4027:1977)
GB/T 79 - 1985 Hexagon socket set screws with dog point (eqv ISO 4028:1977)
GB/T 80 - 1985 Hexagon socket set screws with cup point (eqv ISO 4029:1977)
GB/T 2423.4-1993 Basic environmental testing procedures for electric and electronic products -Test DB: Damp heat, cyclic (eqv IEC 60068-2-30:1980)
GB 3836.11-1991 Electrical apparatus for explosive atmospheres - Method of test for ascertainment of maximum experimental safe gap (eqv IEC 60079- 1A:1975)
GB 3836.12-1991 Electrical apparatus for explosive atmospheres - Classification of gases or vapors with air according to their maximum experimental safe gaps and minimum igniting currents (eqv IEC 60079 - 12:1978)
GB 4208 -1993 Degree of Protection provided by enclosure (IP Code) (eqv IEC 60529:1989)
GB/T 4942.1-1985 Classification of degrees of protection provided by enclosures for rotating machines (eqv IEC 60034 - 5:1981)
GB/T 5277-1985 Fasteners - Clearance holes for bolts and screws (eqv ISO 273:1979)
GB/T 5782-1986 Hexagon head bolts - Product Grades A and B (eqv ISO 4014:1979)
GB/T 5783-1986 Hexagon head bolts - Full-thread - Product Grades A and B (eqv ISO 4017:1979)
GB/T 6031-1998 Rubber, vulcanized or thermoplastic - Determination of hardness (30 ~ 85 IRHD) (idt ISO 48:1994)
GB/T 6170-1986 Hexagon nuts, Style 1 – Product Grades A and B (eqv ISO 4032:1979)
GB/T 7957-1987 Safety cap lamp for mines
GB/T 9145-1988 General purpose screw threads - Limits of sizes for commercial bolt and nut threads – Medium quality (eqv ISO 965/2:1980)
GB/T 9341-1988 Plastic - Determination of flexural properties of rigid plastic s (eqv ISO 178:1975)
GB/T 11020-1989 Test methods for the determination of the flammability of solid electrical insulating materials when exposed to an igniting source (eqv IEC 707:1981)
GB/T 11026.1-1989 Guide for the determination of thermal endurance properties of electrical insulating materials - General guidelines for ageing procedures and evaluation of test results (eqv IEC 60216-1:1987)
GB 13813-1992 Testing method and judging rule of safety to friction spark of metallic material for coal mines
JB/T 7192-1995 Selectable series of general purpose screw threads for commercial bolts and nuts
IEC 60079—4:1975 Electrical apparatus for explosive atmospheres - Part 4: Test method for determination of ignition temperature
IEC 60192: 1973 Low voltage sodium lamp
IEC 60216—2:1990 Guideline for determination of heat endurance property for electrical insulating materials - Part 2: Selection of testing and judging criteria
IEC 60662: 1980 High voltage sodium lamp
IEC 60947 —1:1996 Low voltage switch and controller - Part 1: General Procedures
ISO 179:1993 Plastic - Method for determination of pendulum impact test strength for rigid plastic
ISO 286-2:1988 ISO system of tolerance and fitting-up - Part 2: Table of standard tolerance grade and tolerance limits for holes and shafts
ISO 527-2:1993 Plastics - Determination of tensile properties Part 2: Formed plastics and molded plastics
ISO 1817:1985 Vulcanized rubber - Determination of effect of liquid
ISO 4892-1:1994 Plastics - Test method of exposure to laboratory light source
3 Definitions and Symbols
