煤矿电气安全(新)（Electrical safety in coal mines (New)）.docVIP

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煤矿电气安全(新)（Electrical safety in coal mines (New)）.doc

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煤矿电气安全(新)（Electrical safety in coal mines (New)）

煤矿电气安全(新)（Electrical safety in coal mines (New)） Coal mine electrical safety primary coverage The first part: mine power supply system The second part: basic knowledge of explosion prevention The third part: the protection of mine power network The fourth part: Cable usage and management The fifth part: electric shock and its prevention The sixth part: relevant regulations on safe use of electricity Mine power supply system I. Basic requirements for power supply by coal mining enterprises 1 、 reliable power supply: uninterrupted power supply under the mine; double loop power supply. 2. Safety of power supply: personal safety, equipment safety. 3, power supply economy: to ensure the quality of power supply, economic and reasonable. Two 、 power supply voltage grade of mine 1, 35KV: power supply voltage of mine ground substation. 2, 10KV or 6KV: underground high voltage distribution voltage and high voltage motor rated voltage, underground high voltage shall not exceed 10KV. 3, 3.3KV or 1140V: the rated voltage of the electrical equipment of the comprehensive organization coal face. 4, 660V: underground low-voltage power distribution network voltage. 5, 380V: ground or underground small equipment distribution voltage. 6: 220V: the lighting voltage of fresh air roadway on the ground or in the well. 7, 127V: Ishita Terua, signals, handheld electrical equipment and telephone maximum voltage limit. 8, 36V: coal mine electrical equipment control voltage. 9 、 DC 250V and 550V: commonly used rated voltage of underground DC trolley electric locomotive. Provisions of the 448 regulations on coal mine safety: The rated voltage levels of all kinds of distribution voltage and all kinds of electrical equipment in the underground shall meet the following requirements: 1, high pressure, not more than 10000V. 2 、 low voltage is not more than 1140V. 3, lighting, signal, telephone and handheld electrical equipment power supply rated voltage of not more than 127V. 4. The rated voltage of