Results 21 to 30 of about 26,900,272 (247)
Design of wide range DC input power module used in coal mine
Gong-kuang zidonghua, 2015 In view of problems that power supply voltage level and power type between mine-used sensors and DC power supply system is inconsistent, a design scheme of new type of wide range DC input and intrinsic safety type power module was put forward.
HU Yun +3 more
doaj +2 more sources
Novel cable measurement while drilling device used for directional drilling in coal mine
Gong-kuang zidonghua, 2015 In order to solve problems of short usage time, poor signal stability, high fault ratio and high maintenance cost of existing cable measurement while drilling device for coal mine drilling which was powered by battery in hole, a technology scheme was ...
FANG Jun +3 more
doaj +2 more sources
Gong-kuang zidonghua, 2014 In view of requirement of GB 3836.2-2010 that battery with precipitated combustible mixture cannot be used in flameproof shell, a start-up power supply system of lithium-ion battery of mine-used explosion-proof diesel locomotive was designed with serial lithium-ion batteries.
XIAO Linjing +3 more
openaire +3 more sources
Design Requirements of Mine-used Wireless Methane Sensor
Gong-kuang zidonghua, 2011 The paper analyzed performance requirements of mine-used methane sensor about stability of displayed value, response time and error limit at present, pointed out battery and communication signal of mine-used wireless methane sensor should accord with ...
WANG Xiao-song, LI Xue-ze
doaj +1 more source
Technologies of Batteries Used in Coal Mine Vehicles
Gong-kuang zidonghua, 2011 The paper introduced characteristics of various batteries used in trackless auxiliary haulage vehicles of coal mine including special type lead-acid battery of coal mine, flame-proof and start lead-acid battery, flame-proof and fixed lead-acid battery ...
YUAN Xiao-ming
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Design of a Soft-start Circuit for Mine-used Intrinsic Safety Device
Gong-kuang zidonghua, 2011 For problems that instantaneous large current in start of mine-used devices could lead to power supply cutting-off and abnormal start of the devices, the paper introduced design of a kind of soft-start circuit for mine-used intrinsic safety devices which
FANG Bin, SHEN Xiao-qiang, QIU Yu
doaj +1 more source
Simulation of the power supply system of the coal mine section [PDF]
E3S Web of Conferences, 2021 At present, the designing of a power supply system for mine sections is performed in accordance with obsolete regulatory documents made in the early 90s of the 20th century. This slows down the implementation of the ‘digital mining operation’ concept and
Nepsha Fedor +3 more
doaj +1 more source
Research on Safety of Mine Power Supply System [PDF]
, 2021 Electric power is one of the main supplies of mine energy. The safety of electric power is of great significance to the safety of mines. The probability of blackout is relatively small. But once it happens, the harm is great.
Shan Renzhong +7 more
core +1 more source
Setting strategy of instantaneous current quick-breaking protection for mine power grid
Gong-kuang zidonghua, 2023 The mine power grid operating environment is poor. When a short circuit fault occurs in the underground power supply system, the use of complex anti-skip trip protection device will reduce the reliability of the entire power grid and increase the cost ...
YU Qun, CUI Guoliang, GU Feng, LIU Tao
doaj +1 more source
Firm Power Supply Project Committee Meeting
, 2021 Firm Power Supply Project Committee Meeting, September 15 ...
Utah Associated Municipal Power Systems;
core +7 more sources