Results 11 to 20 of about 1,686,605 (255)
A testing device for intrinsically safe multi-circuit protection power supply
Gong-kuang zidonghua, 2018 In order to solve problems of inconvenient operation, complicated process and low accuracy of existing test methods of intrinsically safe power supply, a testing device for intrinsically safe multi- circuit protection power supply was designed.
REN Gaojian +3 more
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A novel chopping current protection circuit for intrinsically safe power supply
Gong-kuang zidonghua, 2016 For problems that traditional chopping current protection circuit had small cut-off current value and poor anti load impact ability, and needed additional recovery circuit or manual circuit after over-current fault, a novel chopping current protection ...
FANG Xupeng +4 more
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Transient analysis of surge immunity test for intrinsically safe sensor
Gong-kuang zidonghua, 2018 For problem that it was difficult to achieve evaluation grade A due to a long time reverse gap in DC power port voltage of intrinsically safe sensor in positive surge immunity test, taking a typical mine-used intrinsically safe methane sensor as research
ZHANG Ziliang
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Design Requirements of Lithium Battery in Intrinsically Safe Circuit
Gong-kuang zidonghua, 2010 The paper introduced safety performance requirements of lithium battery and design requirements of battery and battery pack in intrinsically safe circuit at home and abroad,analyzed common problems in designing battery of intrinsically safe circuit and ...
WANG Qi, WANG Chu
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Design of novel intrinsically safe power supply with 'ia' grade
Gong-kuang zidonghua, 2017 According to working condition of mine-used power supply in coal mine underground, novel intrinsically safe power supply with 'ia' grade was designed. The power supply uses a fully enclosed AC-DC module to eliminate special flameproof enclosure, and has ...
YU Zhixue, FANG Xupeng, ZHAO Yang
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Gong-kuang zidonghua, 2017 In view of poor real-time performance and complex wiring existed in traditional operating condition monitoring of coal mine mechanical and electrical equipment, a mine-used intrinsically safe equipment monitoring substation based on wireless ...
DU Yan +7 more
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Design of Intrinsically Safe Power Supply Based on Two-phase Synchronous Boost Technology
Gong-kuang zidonghua, 2011 In view of problem of bigger output ripper existed in intrinsically safe power supply based on single-phase synchronous boost technology, the paper proposed a design scheme of intrinsically safe power supply based on two-phase synchronous boost ...
ZHANG Xing-hua +5 more
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Optimization Design of Intrinsic Safety Pilot Circuit for Motor Remote Start and Stop
Meikuang Anquan, 2020 This paper introduces the types of remote starting and stopping pilot circuits of existing motors, the existence of mis-starting, the inability to identify all line faults and the unstable operation of power supply voltage reduction, and proposes an ...
ZHANG Yuxiang, SONG Jiancheng, TIAN Muqin
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Safety analysis of half wave oscillator structure in underground 5G radiation field
Gong-kuang zidonghua, 2023 GB 3836.1-2021 Explosive atmospheres - Part 1: Equipment-General requirements stipulates that the RF threshold power of RF equipment in explosive environments shall not exceed 6 W.
TIAN Zijian +4 more
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Sensitivity analysis of IEC spark test apparatus
Meikuang Anquan, 2021 The sensitivity of spark test apparatus is affected by environmental factors, tungsten wire electrode and cadmium disk electrode. In this paper, the intersection / separation trajectories of tungsten wire electrode and cadmium disk electrode in a test ...
ZHANG Yong
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