Non standard customized explosion-proof distribution box

IIB | IIC Non standard Customized Explosion proof Distribution Box Definition and Function

Explosion proof distribution box is a type of distribution box with explosion-proof performance, mainly used in hazardous environments such as flammable and explosive gases, vapors, or dust. It distributes power to various electrical equipment and plays a role in controlling, protecting, and monitoring circuits to ensure the safe operation of electrical systems in hazardous environments.

structural design

Shell: Typically made of high-strength, impact resistant metal materials such as aluminum alloy or stainless steel, but some also use engineering plastics. Has sufficient strength and stiffness to withstand internal explosion pressure and external impact.

Sealing structure: The lid and the box are sealed with sealing strips to ensure that flammable and explosive gases or dust from the outside cannot enter the box, and to prevent internal sparks and other hazardous substances from igniting the outside.

Internal layout: The internal structure is divided into several units, and each switch and electrical component is isolated from each other to prevent electric sparks or arcs from propagating between the components.

working principle

Explosion proof principle: The outer shell of the explosion-proof distribution box can withstand the pressure generated by the explosion of the internal explosive mixture, and prevent the internal flames and high-temperature gases from spreading to the outside, avoiding the ignition of surrounding flammable and explosive substances.

Principle of increased safety: The increased safety explosion-proof distribution box will not generate arcs, sparks, or high temperatures during normal operation. By taking measures to improve the safety of electrical equipment, such as limiting electrical clearances and creepage distances, strengthening insulation, etc., the possibility of ignition sources is reduced.

• Intrinsic safety principle: Intrinsically safe explosion-proof distribution boxes limit the energy in the circuit, so that the electrical sparks and thermal effects generated by the circuit under normal operation and specified fault conditions cannot ignite the surrounding explosive mixture.

Technical Specifications

Explosion proof rating: Common ones include Exd Ⅱ BT6, Exd Ⅱ CT6, etc. Ex "represents explosion-proof," d "represents explosion-proof type," IIB "and" IIC "represent applicable explosive gas levels, and" T6 "represents the maximum surface temperature of the equipment.

• Protection level: such as IP54, IP65, etc. IP54 indicates a dustproof level of 5 and a waterproof level of 4; IP65 indicates a dustproof level of 6 and a waterproof level of 5.

Rated voltage: Common ones include 220V, 380V, etc.

Rated current: There are different rated current specifications based on actual usage needs, such as 10A, 20A, 50A, etc.

Application scenarios

Petrochemical industry: In places such as oil extraction, refining, and chemical production, there are a large amount of flammable and explosive gases and liquids. Explosion proof distribution boxes are used for the distribution and control of various electrical equipment.

Coal industry: Combustible gases such as gas and coal dust exist underground in coal mines, and explosion-proof distribution boxes are important equipment to ensure the safe operation of electrical equipment underground.

In the military industry, it is crucial to prevent explosion accidents in storage and other places. Explosion proof distribution boxes are used for the distribution and control of related electrical systems.

Other industries, such as textiles, printing and dyeing, grain processing and other places with combustible dust, as well as flammable and explosive environments in shipbuilding, aerospace and other fields, also require the use of explosion-proof distribution boxes.