NB/T 11461-2023Technical condition of high density electrical prospecting instrument for coal mine (English PDF)
矿用高密度电法探测仪技术条件
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Issued by
NEA
Level / Type
Industry · Recommended
Issue date
December 28, 2023
Implementation date
June 28, 2024
Scope
NB/T 11461-2023 is the English-translated version of 矿用高密度电法探测仪技术条件.
NB/T 11461-2023 covers high-density electrical prospecting instruments for coal mines. It sets classification and model naming, with intrinsically safe design and the explosion-proof marking Ex ib I Mb, followed by technical requirements, test methods, inspection rules and marking, packaging, transportation and storage.
The test programme refers to low and high temperature, cyclic damp heat, impact, vibration and IP enclosure protection methods, and to the basic test methods for mine communication, detection and control products.
The standard defines no terms of its own. It is used in the design, production and quality inspection of these mining instruments. Issued on 28 December 2023, it has applied since 28 June 2024.
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Document preview — NB/T 11461-2023
National Standard of the People's Republic of China
- Classification
- D 82
Issued by: National Energy Administration of the People's Republic of China
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Classification and naming
- 5 Technical Requirements
- 6 Test methods
- 7 Inspection Rules
- 8 Marking, packaging, transportation and storage
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.
1 Scope
This document specifies the product types, technical requirements, test methods, inspection specifications, and Rules, marking, packaging, transportation and storage.
This document applies to the design, production and quality inspection of high-density electrical detectors for mining.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.
GB/T 191 Packaging, storage and transportation pictorial symbols
GB/T 2423.1 Environmental testing for electric and electronic products Part 2: Test methods Test A. Low temperature
GB/T 2423.2 Environmental testing for electric and electronic products Part 2: Test methods Test B. High temperature
GB/T 2423.4 Environmental testing for electric and electronic products Part 2: Test method Test Db cyclic damp heat (12h 12h cycle ring)
GB/T 2423.5 Environmental testing Part 2: Test method Test Ea and guidance. Impact
GB/T 2423.10 Environmental testing Part 2: Test methods Test Fc. Vibration (sinusoidal)
GB/T 3836.1-2021 Explosive atmospheres Part 1: General requirements for equipment
GB/T 3836.4-2021 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i"
GB/T 4208 Enclosure protection grade (IP code)
GB/T 10111-2008 Generation of random numbers and their application in product quality sampling inspection
GB/T 13384 General technical requirements for packaging of electromechanical products
MT/T 210 Basic test methods for electrical and electronic products used for communication, detection and control in coal mines
3 Terms and definitions
There are no terms or definitions that require definition in this document.
4 Classification and naming
4.1 Explosion-proof type
The electrical instrument adopts intrinsically safe design, and the explosion-proof mark is "ExibIMb".
4.2 Model naming
The model naming method of the electrical instrument is as follows. […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 23 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 191Graphical symbols marking for handling and storage of packages
- GB/T 2423.1Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold
- GB/T 2423.2Environmental testing for electric and electronic products - Part 2: Test methods - Tests B: Dry heat
- GB/T 2423.4Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
- GB/T 2423.5Environmental testing - Part 2: Test methods - Test Ea and guidance: Shock
- GB/T 2423.10Environmental testing - Part 2: Test methods - Test Fc: Vibration (sinusoidal)
MT/T 210
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Related Standards
GB/T 10111-2008 — Generation of random numbers and procedures applied to sampling inspection for product quality
GB/T 13384-2008 — General specifications for packing of mechanical and electrical product
GB/T 191-2025 — Graphical symbols marking for handling and storage of packages
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NB/T 11461-2023
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