Installation of explosion-proof electrical equipment
1. Instruments, electrical equipment, and installation materials used in explosive hazardous areas, such as junction boxes, distribution boxes, terminal boxes, etc., must have a certificate issued by an authorized agency in the countryExplosion proof certificateBefore installation, the specifications and models should be checked to ensure they meet the design requirements, and there should be no damage or cracks on the outside.
2. It can also be set up in explosive hazardous areasPositive pressure explosion-proofThe instrument box is equipped with non explosion proof instruments and other electrical equipment. The ventilation pipe of the instrument box must be kept unobstructed. Before power transmission, it should be connected to the volume of the box5Replace more than twice the amount of gas.
3. Explosive hazardous area1The instrument wiring within the area must ensure that no ignition source is formed in the event of grounding, short circuit, disconnection or other accidents. Therefore, cables and wires must be laid in conduit, using pressure resistant and explosion-proof metal pipes. Cylindrical pipe threads should be used to connect between conduit protection pipes and between protection pipes and junction boxes, distribution boxes, and pull boxes. The effective engagement part of the threads should be in the5~6Deduct above. Explosion proof flexible connecting pipes should be used when flexible connections are required.
4. In2The instrument wiring within the area should generally be threaded through pipes, but only to protect the insulation layer of cables and wires from external damage.
5. When cable ducts, cable trenches, and protective pipes pass through the boundary lines of different levels of explosive hazardous areas, sealing measures should be taken to prevent explosive gases from entering another hazardous area from one hazardous area.
6. When connecting protective tubes with on-site instruments, detection components, electrical equipment, instrument boxes, junction boxes, pull boxes, etc., they should be installed within the connection pointsExplosion proofSealed pipe fittings, yes2inThe above protective tubes are installed every15mA sealed pipe fitting should be installed.
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