Electrical equipmentExplosion proofThe shell has lost its explosion resistance or insulation(I.e. non explosive)It's just an explosion. Common explosion failure phenomena of explosion-proof electrical equipment include:

1The explosion-proof shell is severely deformed or cracked, the weld seam is open, the connecting screws are incomplete, the screw buckle is damaged, or the depth of tightening is less than the specified value, resulting in its mechanical strength not meeting the requirements of explosion resistance and failure to explode;

2The explosion-proof joint surface is severely corroded, and due to mechanical damage, gaps exceeding the specified value, dents, and connecting screws not being tightened, it fails to meet the requirements of non explosion transmission and fails to explode;

3The cable inlet and outlet do not use qualified sealing gaskets or do not have sealing gaskets at all; Unused cable connection holes without qualified sealing barriers or without sealing barriers at all, resulting in explosion;

4.Randomly adding electrical elements or components inside the equipment casing, causing certain electrical distances to be less than the specified value, or insulation damage, resulting in the failure of the arc extinguishing device, causing a short circuit between phases through the casing arc light grounding, and causing the casing to be burned through by the short circuit arc and fail to explode;

5.The two explosion-proof chambers inside the shell are connected due to the burning of the wiring terminals and wiring sleeves, resulting in pressure accumulation during internal explosion and causing the shell to fail; The failure of the shell is mainly caused by the installation and maintenance quality not meeting the standard requirements, as well as improper use and maintenance. Therefore, it is necessary to strictly ensure the requirements of explosion-proof quality standards, and strictly implement relevant regulations and standards during installation, use, maintenance, and overhaul in order to prevent explosion failure.