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Safety measures for electrical design of a certain device

by:Sure     2021-08-13
1) Device power supply line selection Use three-core cross-linked polyethylene fire-resistant cables, lighting cables and wires use copper cores, and protective tubes use galvanized welded steel pipes. 2) The division of explosion-hazardous areas of the device and the selection and installation of power equipment shall comply with the national standard GB50058-92 'Code for Design of Electrical Installations in Explosive and Fire Hazardous Environments'. Electrical equipment installed in the explosion hazard zone 2 1) The power supply line of the device adopts three-core cross-linked polyethylene fire-resistant cables, the lighting cables and wires use copper cores, and the protective tubes use galvanized welded steel pipes. 2) The division of explosion-hazardous areas of the device and the selection and installation of power equipment shall comply with the national standard GB50058-92 'Code for Design of Electrical Installations in Explosive and Fire Hazardous Environments'. The electrical equipment installed in the explosion hazard zone 2 is dⅡBT4 or eⅡT3. The electrical equipment of the pneumatic machine room is dⅡCT4 or eⅡT3. 3) All metal shells of electrical equipment normally uncharged and process metal equipment (towers, containers, etc.) in explosion-hazardous areas are reliably grounded, and the equipment is grounded for work, lightning protection, and protection. Static grounding shares a grounding system, and the grounding resistance is not more than 4Ω. 4) Fire alarm buttons are set in the main passage and fire passage in the device, and the signal is led to the fire alarm controller in the central control room of the instrument. 5) An industrial television monitoring system is installed in the device, and the monitoring points are respectively located in the heat exchange area, pump area, air cooler platform and main fan unit.
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