Dalian Explosion proof Electrical Appliances vs. Ordinary Electrical Appliances: Structural Differences, Protective Performance, and Applicable Scenarios Comparison

Dalian Explosion proof Electrical Appliances vs. Ordinary Electrical Appliances: Structural Differences, Protective Performance, and Applicable Scenarios Comparison

The core difference between Dalian explosion-proof electrical appliances and ordinary electrical appliances lies in the different design logic of "safety in flammable and explosive environments". The former requires a special structure to block the ignition source, while the latter only meets conventional electrical safety requirements. The two have significant differences in structure, protective performance, and applicable scenarios.

The structural differences are reflected in the explosion-proof design of key components. The shell of ordinary electrical appliances is mostly made of plastic or thin metal material, and there is no sealing treatment at the joints. If electric sparks occur in the exposed parts of the internal circuit, they are easily leaked directly; The explosion-proof electrical casing is made of high-strength materials such as cast aluminum or stainless steel, with a thickness 3-5 times higher than ordinary electrical appliances, and explosion-proof surfaces are set at the joints (gap ≤ 0.1mm). Even if electric sparks are generated inside, they can be cooled and flame-retardant through the casing, avoiding ignition of external flammable substances. In addition, explosion-proof sealing boxes should be installed on the wiring terminals of explosion-proof electrical appliances, and explosion-proof gland heads should be used at the cable entry points to prevent flammable gases from entering the equipment through cable gaps.

 

In terms of protection performance, the protection level of ordinary electrical appliances is mostly IP20-IP54, which can only prevent dust and splash water; In addition to meeting the dust and waterproof rating of IP54 or above, Dalian explosion-proof electrical appliances also need to pass the "explosion-proof type certification". For example, the explosion-proof type (Ex d) can withstand internal explosive pressure, and the increased safety type (Ex e) avoids arc generation by strengthening insulation. In applicable scenarios, ordinary appliances are often used in environments such as homes and offices where there is no risk of flammability or explosion; Explosion proof electrical appliances are designed for places such as chemical workshops, gas stations, and underground coal mines. For example, gas stations require Ex d IIB T4 explosion-proof electrical appliances to prevent gasoline vapor from exploding when exposed to electric sparks. The selection of the two should strictly match the safety risks of the usage environment to avoid safety accidents caused by improper selection.