Explosion-proof and anticorrosive junction box, the shell is made of impact resistant glass fiber reinforced polyester material, all metal parts are corrosion resistant. The joint surface of the cover and the base is designed in a concave and convex shape, with silicone rubber sealing structure, ensuring the protection level of IP65. It is used for connecting all kinds of electrical equipment and instruments in 220V/380V circuit.

Explosion-proof junction box mainly includes lighting distribution box for controlling lighting system and power box for controlling power system. It is mainly composed of circuit breaker, contactor, thermal relay, change-over switch, signal lamp, button and other components. This kind of product made flameproof or most of the increased safety type, volume is small, the difference is bigger, explosion-proof grade can reach Ⅱ C level.

Application scope of explosion-proof and anticorrosive junction box

Dangerous places in zone 1, 1 and 2.

2. IIA, IIB and IIC explosive gas environment.

3. Combustible dust environment area 20, 21, 22.

4. Temperature groups are T1 - T6.

1.1 classification of hazardous areas in explosive gas environment

Different countries and regions, according to their own standards to divide the explosion risk areas. According to the frequency and duration of the occurrence of explosive gas mixture in China, the explosive gas environment is divided into O zone, 1 zone and 2 zone. (in line with IEC international electrotechnical committee)

Zone 0: continuous or long-term explosive gas mixture environment.

Zone 1: an environment where explosive gas mixtures may occur during normal operation.

Zone 2: an environment where an explosive gas mixture is unlikely to occur during normal operation or where the presence of such an explosive gas mixture is short-lived.

Generally, zone 0 only exists in sealed containers, storage tanks and other internal gas space. In the actual design process, zone 1 rarely exists, and most cases belong to zone 2.

1.2 explosion-proof electrical equipment is divided into two categories:

Ⅰ electrical equipments used in coal mine

Type Ⅱ except mine using electrical equipment

1.3 Ⅱ kind of electrical equipment, according to the applicable to large explosive gas mixture test security clearance or small lighting current ratio, divided into Ⅱ A, Ⅱ B, Ⅱ C three categories; And according to its high surface temperature divided into t1-t6 six groups.

1.4 explosive gas mixtures are grouped by ignition temperature, as shown in table 1.

1.5 explosive gas mixtures are classified according to their large test safety gap (MESG) or small ignition current ratio (MICR), as shown in table 2.

Product features

1. It can be used in the circuit of 380/220v or below as the dividing line and connection of various electrical equipment, as well as the connection of automatic control or communication signal power supply.

2. The shell is made of high strength and refractory engineering plastics, with beautiful appearance, good anti-static and impact resistance, good thermal stability and corrosion resistance, etc.

3. A sealing ring is arranged between the cover and the shell body and is tightened with stainless steel screws.

4. The terminals can use pressure-wire type or phoenix special-purpose terminals with increased safety.

5. Terminal number, outlet direction and number, nominal diameter can be arbitrarily changed.