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NB/T 11460-2023Technical conditions of transient electromagnetic detecting instrument for coal-mine (English PDF)

矿用瞬变电磁超前探测仪技术条件

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

December 28, 2023

Implementation date

June 28, 2024

Scope

NB/T 11460-2023 is the English-translated version of 矿用瞬变电磁超前探测仪技术条件.

NB/T 11460-2023 lays down technical conditions for transient electromagnetic advance detectors, instruments used for advance detection in coal mines. It covers naming, composition and classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage.

Defined quantities include the transmitting current and the turn-off time, the interval in which the current drops from 100% to 10% of its stable value. Tests draw on environmental methods for temperature, damp heat, impact and vibration, on flameproof and intrinsically safe protection and on IP enclosure rating.

It supports research, design, production and quality inspection of these instruments. Issued on 28 December 2023, it has applied since 28 June 2024.

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Document preview — NB/T 11460-2023

National Standard of the People's Republic of China

ICS: 73.100.99
Classification: D 82

Issued by: National Energy Administration of the People's Republic of China

Preface
1 Scope
2 Normative references
3 Terms and Definitions
4 Naming, composition and classification
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 naming, composition and classification, technical requirements, test methods and procedures of mine transient electromagnetic advance detectors (hereinafter referred to as transient detectors). Methods, inspection rules, marking, packaging, transportation and storage.

This document is applicable to the R&D, design, production and quality inspection of transient instruments.

2 Normative references

The contents of the following documents constitute the 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 Pictorial markings for packaging, storage and transportation

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 3836.2-2021 Explosive atmospheres Part 2: Equipment protected by flameproof enclosure "d"

GB/T 3836.4-2021 Explosive atmospheres Part 4: Equipment protected by intrinsic safety type "i"

GB/T 4208-2017 Enclosure protection degree (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

AQ1043 Mining Product Safety Signs and Labels

MT210-1990 Basic test methods for electrical and electronic products used for communication, detection and control in coal mines

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Transmitting current

In actual detection operations, when the transient instrument is transmitting, an excitation current is provided to the transmitting wire frame. After the transmitting voltage reaches the set value, The current value recorded when the current is turned off.

3.2 Turn-off time

In actual detection operations, when the transmitting current is turned off, the time interval during which the current intensity drops from 100% of the initial stable current to 10%.

Note: Also called effective ramp step time width.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 19 pages — is available in the English PDF.

Referenced standards

Normative references

AQ1043 · MT210-1990

Similar standards

NB/T 11543-2024|NB/T 11461-2023|NB/T 11544-2024|GB 48006-2026|NB/T 11515-2024|GB/T 18771.5-2015

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