This standard specifies the types and parameters, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of electrical control equipment (hereinafter referred to as electrical control equipment) for cantilever tunneling machines used in coal mines. This standard is applicable to the control equipment of cantilever tunneling machines used as development preparation working faces in mines containing gas (methane) and dust explosion hazards. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 2682-1981 Colors of indicator lights and buttons in complete electrical installations GB 3836 Electrical Equipment for Explosive Gas Atmospheres Part 1: General Requirements (eqv IEC 60079-0; 1998) GB 3836 Electrical equipment for explosive gas atmospheres - Part 2: Flameproof type "d" (eqv IEC 60079-1: 1990) GB 3836.3-2000 Electrical equipment for explosive gas atmospheres - Part 3: Increased safety type "e" (eqv IEC 60079-7:1990) GB 38364-2000 Electrical equipment for explosive gas atmospheres - Part 4: Intrinsically safe type "i" (eqv IEC 60079-11; 1999) GB/T 11021-1989 Thermal resistance assessment and classification of electrical insulation (eqv lEC 85: 1984) GB/T 14048 1-2000 General Principles for Low Voltage Switchgear and Control Equipment (eqv IEC 60947-1: 1999) GB 14048.9-1998 Multifunctional Electrical Appliances (Equipment) for Low Voltage Switchgear and Control Equipment Part 2: Control and Protection Switchgear (Equipment) (idt IEC 947-6-2: 1992) MT/T 154.2-1996 Coal Mine Electrical Equipment Product Model Selection and Management Methods MT 210-1990 Coal Mine Communication, Testing Basic test methods for electrical and electronic products for control purposes MT/T 412-1995 Low voltage terminal blocks for explosion-proof electrical equipment MT/T 682-1997 Electrical control equipment series and parameters for cantilever tunneling machines JB 4262-1992 Rubber sheathed cable entry device for explosion-proof electrical appliances "Coal Mine Safety Regulations" (2004 version) National Coal Mine Safety Supervision Bureau
Function of testing report:
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1. Telephone communication and confirmation of requirements
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1. The testing industry is fully covered, meeting different testing needs
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4. Free initial testing, with no testing fees charged
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