Zobrazeno 1 - 10
of 131
pro vyhledávání: '"leakage protection"'
Publikováno v:
Meikuang Anquan, Vol 53, Iss 12, Pp 150-154 (2022)
In order to solve the problem that the high-voltage DC power supply system of the communication base station of the intelligent fire protection system in the open-pit coal mine area has the risk of personal electric shock when the insulation of any b
Externí odkaz:
https://doaj.org/article/650d71cde2794a3780f78de129a981c8
Publikováno v:
Applied Sciences, Vol 13, Iss 16, p 9273 (2023)
The fluctuation of normal leakage current has a great influence on the fixed-threshold leakage protector. To address this issue, this paper proposes an adaptive leakage protection method based on the sparrow search algorithm (SSA)-backpropagation (BP
Externí odkaz:
https://doaj.org/article/e71bcfbff019473080aa8f14daaeffb2
Autor:
GUO Chunping
Publikováno v:
Meikuang Anquan, Vol 51, Iss 12, Pp 133-139 (2020)
In order to provide theoretical support for the necessity of remote manual leakage tripping test, the distributed parameter circuit theory is applied to analyze the underground power supply system. By comparing and analyzing the AC equivalent circuit
Externí odkaz:
https://doaj.org/article/8af32a5945734f6d87dfb54774d57233
Publikováno v:
Meikuang Anquan, Vol 52, Iss 8, Pp 142-146 (2021)
In view of the characteristics of scattered distribution and various operation modes of various electrical equipment in coal mining face at present, a combined switch is used for control. The power supply mode, structure composition, protection syste
Externí odkaz:
https://doaj.org/article/470dd0039dd34d80879a392be38b87e1
Publikováno v:
Meikuang Anquan, Vol 52, Iss 1, Pp 140-143 (2021)
A feed switch protection system in the coal mine based on STM32F407 chip is designed. The system has protection functions such as leakage, overcurrent, and short circuit. The system design uses a modular design method, combining the advantages and di
Externí odkaz:
https://doaj.org/article/e46a53843c184a0c8a842773ec1f4667
Autor:
YU Qun, SHANG Xueli
Publikováno v:
Gong-kuang zidonghua, Vol 46, Iss 11, Pp 17-22 (2020)
Aiming at problem of low accuracy of line selection when single-phase grounding fault occurs in mine power supply system at present, according to characteristics of obvious difference of zero-sequence current waveform between fault line and non-fault
Externí odkaz:
https://doaj.org/article/8b9289c1f50e4c0d891da5ffbc6ebffc
Autor:
ZHOU Dehua
Publikováno v:
Meikuang Anquan, Vol 51, Iss 8, Pp 154-157 (2020)
This paper introduces the system architecture of explosion-proof heavy-duty electric driven shovel truck, and discusses the key technologies of safety performance of explosion-proof heavy-duty electric driven shovel truck in safety braking, automatic
Externí odkaz:
https://doaj.org/article/eb9c4f6559074f92a226e84ed57a907e
Publikováno v:
Gong-kuang zidonghua, Vol 46, Iss 6, Pp 59-64 (2020)
The phenomenon of harmonic wave and arc light in mine power grid is increasingly serious, and leakage fault signal distortion and probability of arc light leakage increases, resulting in serious fault signal distortion and less fundamental wave compo
Externí odkaz:
https://doaj.org/article/d185ad4757e34b349384429c667cb956
Publikováno v:
Gong-kuang zidonghua, Vol 46, Iss 2, Pp 12-17 (2020)
In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device w
Externí odkaz:
https://doaj.org/article/cfd32d508d734bd0964fc2e7e16a3a34
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.