Explosion-proof electrical enclosure material regulations

Explosion-proof electrical enclosure materials regulations stipulate the door opening time of quick-opening structures: quick-opening structure refers to the door of an explosion-proof electrical equipment device, which only needs to release a small amount of bolts or bolts that do not need to be released. The door can be opened in a short time through a simple operation. . In order to prevent the remaining energy inside the electrical equipment from igniting the biogas after the door or cover is opened, the “Regulations” stipulates that the time for the mine explosion-proof electrical installation to be switched from off to the cover (gate) must be greater than the discharge of the capacitor to the remaining energy is less than The time required for 0.2 MJ and the time required for the heater temperature to drop below 450 degrees. This time interval should be marked on the warning board.

Plastics only have the advantages of corrosion resistance, moisture resistance, good insulation properties, and light weight. Therefore, the shells of some small explosion-proof electrical equipments are mostly made of plastic. When the surface area of the plastic housing is more than 100 cm, it should be designed to prevent the generation of a dangerous electrostatic charge structure under normal use and maintenance and cleaning. Due to the poor mechanical strength and heat-resistant stability of the plastic housing of the explosion-proof electrical appliance, it is easy to accumulate static electricity and so on. Therefore, plastics with high mechanical strength, good thermal stability, and antistatic, non-burning or non-flammable plastics should be selected.

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