Standard No.:	MT/T 1178-2019
English Name:	Mine explosion-proof high voltage frequency converter
Chinese Name:	矿用防爆高压变频器
Professional Classification:	MT    Professional Standard - Coal
Source Content Issued by:	State Administration of Work Safety
Issued on:	2019-11-28
Implemented on:	2020-6-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	13500 words
Translation Price(USD):	405.0
Delivery:	via email in 1 business day

MT/T 1178-2019 Mine explosion-proof high voltage frequency converter 1 Scope This standard specifies the terms and definitions, types, naming and basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of mine explosion-proof high voltage frequency converters (hereinafter referred to as frequency converters). This standard is applicable to high voltage frequency converters for coal mines powered by three-phase AC power supply with a rated input frequency of 50 Hz and a rated output voltage range of 3.3kV to 10kV. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 156 Standard voltages GB/T 191 Packaging - Pictorial marking for handling of goods GB/T 311.1 Insulation co-ordination - Part 1: Definitions, principles and rules GB/T 1094.3 Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air GB/T 2423.4 Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h+12h cycle) GB 3836.1-2010 Explosive atmospheres - Part 1: Equipment - General requirements GB 3836.2-2010 Explosive atmospheres - Part 2: Equipment protection by flameproof enclosures d GB 3836.3-2010 Explosive atmospheres - Part 3: Equipment protection by increased safety "e" GB 3836.4-2010 Explosive atmospheres - Part 4: Equipment protection by intrinsic safety “i” GB/T 8286-2017 Mining flameproof movable substations GB/T 10111-2008 Generation of random numbers and procedures applied to sampling inspection for product quality GB/T 11022 Common specifications for high-voltage switchgear and controlgear standards GB/T 12325 Power quality - Deviation of supply voltage GB/T 12668.3-2012 Adjustable speed electrical power drive systems - Part 3: EMC requirements and specific test methods GB/T 12668.4-2006 Adjustable speed electrical power drive systems - Part 4: General requirements - Rating specifications for a.c.power drive systems above 1 000 V a.c. not exceeding 35 kV GB/T 12668.6 Adjustable speed electrical power drive systems - Part 6: Guide for determination of types of load duty and corresponding current ratings GB 14048.1-2012 Low-voltage switchgear and controlgear - Part 1: General rules GB/T 14549 Quality of electric energy supply - Harmonics in public supply network GB/T 15543 Power quality - Three-phase voltage unbalance GB/T 15945 Power quality - Frequency deviation for power system GB/T 16927.1-2011 High-voltage test techniques - Part 1: General definitions and test requirements GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test GB/T 17626.3 Electromagnetic compatibility - Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test GB/T 17626.4 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test GB/T 17626.5 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test GB/T 17626.6 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields AQ/T 1043 Mining products safety label JB/T 501-2006 Test guide for power transformers MT/T 661-2011 General technical condition for electrical apparatus used underground mine 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 12668.3 and GB/T 12668.4 and the following apply. 3.1 high voltage frequency converter device that controls the operation of a high-voltage AC three-phase asynchronous motor by changing the output frequency and output voltage (or current) 3.2 out rated power output power on the driver motor shaft of the frequency converter when operating under the specified rated parameters

Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Type, model designation and basic parameter 5 Technical requirements 6 Test method 7 Inspection rules 8 Marking, package and storage