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What types of explosion-proof electrical equipment?

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2023.11.21
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1.explosion-proof electrical equipment: with explosion-proof shell electrical equipment called explosion-proof electrical equipment. Blast casing can bear the internal mixture of gases are ignited by the explosion caused by the pressure, but also to prevent the internal explosion of flames and high-temperature gases drilled out of the explosion-proof gap to ignite the casing around the flammable and explosive mixture of substances. The type of machinery and equipment labeled as "d";

2. Increase the safety of electrical equipment: normal operation is not easy to cause arcs, sparks or likely to ignite flammable and explosive mixture of high-temperature point of electrical equipment, its structure to take certain effective measures to enhance the degree of prevention of arcs, sparks, or likely to ignite a mixture of flammable and explosive substances in the normal or specified load conditions of the electrical equipment, known as the increase in the type of electrical equipment, safety. This type of equipment is labeled "e";

3. Intrinsically safe electrical equipment: all lines are intrinsically safe electrical equipment called intrinsically safe electrical equipment. The so-called intrinsically safe line means: in the specified circumstances, normal work or specified problem situations, resulting in electrical sparks and thermal effects are unable to ignite flammable and explosive mixture of substances in the line. This type of equipment is labeled as "i" (divided into ia, ib two categories);

4. Positive pressure type electrical equipment: with positive pressure shell electrical equipment is called positive pressure type electrical equipment. The so-called positive pressure shell is to add protective gases to the shell to ensure that the pressure of the internal protective gases exceed the pressure of the surrounding flammable and explosive environment, in order to avoid the external flammable and explosive mixture of substances into the shell of the shell. This type of equipment is labeled "P";

5. Oil-filled electrical equipment: all the accessories or likely to cause sparks or over-temperature part of the accessories immersed in oil, so that it can not lead to oil above the surface or outside the shell of the flammable and explosive mixture of substances, this electrical equipment is called oil-filled electrical equipment. For example, oil-filled high-voltage explosion-proof power distribution equipment oil circuit breaker. This type of equipment is identified as "O";

6. Sand-filled electrical equipment: Shell filled with sand material, so that it is in the specified circumstances caused by the shell of the arc, the spread of the flame, the shell wall or the surface of the sand material of the super-temperature temperature can not ignite its surrounding flammable and explosive mixture of substances, this electrical equipment is called sand-filled electrical equipment. This type of equipment is labeled as "q";

7. non-sparking electrical equipment: in normal operation is not easy to ignite the surrounding flammable and explosive mixture of substances, and generally not easy to occur with the role of electric ignition, this electrical equipment is called non-sparking type of electrical equipment. This type of electrical equipment is labeled "n";

8. Pouring type: the conductive fittings will be poured in the pouring sealant, and dangerous gases isolated from the electrical equipment, called pouring type electrical equipment. It is labeled as "m";

9. Gas-tight: the use of completely sealed metal casing, and dangerous gases isolated from the electrical equipment, called gas-tight electrical equipment. It is identified as "h".


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