Industrial plug is a commonly used finished product. Compared with ordinary household socket, it has certain differences and plays an important role in industry. IP54, that is, dust prevention is level 5: dust intrusion cannot be completely prevented, but the amount of dust intrusion will not affect the normal operation of the product; Waterproof grade 4: prevent splashing water from invading, and prevent splashing water from all directions from invading. A switch is arranged between the weatherproof socket resistor and the electromagnetic switch, the fuse and the electromagnetic switch are connected with a power line, the power line is provided with a normally open switch of the electromagnetic switch, and the normally open switch of the electromagnetic switch is connected with the jack. NEMA wiring device must be as small as possible in order to realize frequent commutation, but also to realize braking during commutation and acceleration after commutation. Therefore, it is necessary to adopt commutation device quickly and braking device effectively.According to national standards, the protection level of industrial plugs is divided into two parts. The first part is anti-fouling, which is very important, because it relates to the use environment of industrial plugs. According to the protection level, from low to high, the higher the value, the higher the protection level. The second part is moistureproof. According to the moistureproof grade from low to high, the more the quantity, the higher the moistureproof grade.IP67 The first number 6 in IP67 expresses: dust-tight/dust-free entry into IP67; the second number 7 expresses: waterproof immersion/immersion in water with required working pressure; after the required time, the incoming water flow should be harmless.There are four industrial plugs 16a 32a 63a 125a, and the working voltage is 40v-45v, blue, purple, 110v-130v (light yellow), 200v-250v (sky blue)20 v-415 v is bright red, 500v is grey black.Available numbers: (power socket 0, open socket 1, coupler 2, hidden power socket 3, inclined flange 4, hidden power socket 5, hidden power socket 6)Rated voltage number: (1 is 16a, 2 is 32a, 3 is 63a, 4 is 125a)Number of shots: (3 shots, 3 shots, 4 shots, 4 shots, 5 shots)Type and specification mark of industrial plug: for example, TYP163 is expressed as industrial plug, with sky blue color, working voltage of 220-250V, current 16A, pole number of 3 poles and protection level of IP44.Unique specifications and models: (L means taper plug, N means the same color)