First of all, we first analyze the concept, nature of the dust explosion-proof, and the processing standards of dust explosion-proof enclosures:
Dust explosion-proof box Dust explosion-proof zone division 20 zone: In normal operation, combustible dust occurs continuously or often, the amount of which is sufficient to form combustible dust and air mixture and/or may form an uncontrollable and extremely thick dust layer. Place and container interior.
Zone 21: During normal operation, there may be sites where the amount of dust is sufficient to form a mixture of flammable dust and air but not in Zone 20. This area includes: places directly adjacent to the charged or discharged dust points, where dust layers and combustible dust and air mixtures are likely to be generated under normal operating conditions.
Zone 22: Locations where flammable dust occasionally appears under unusual conditions and is only present for a short period of time or where flammable dust accumulates occasionally or there may be a dust layer and produce a mixture of flammable dust air.
If it cannot be ensured that the flammable dust accumulation or dust layer can be excluded, it should be divided into 21 areas.
Dust explosion-proof electrical equipment design principles: limit the maximum surface temperature of the enclosure and the use of "dust-tight" or "dust-proof" enclosures to limit the entry of dust to prevent ignition of flammable dust.
This kind of equipment will install live parts in a protective enclosure, which limits the entry of dust and isolates the ignition source from the dust to prevent explosions.
According to the difference in the dust-proof structure of the device, the device is divided into A-type device or B-type device.
Application of dust explosion-proof box:
Dust explosion-proof box is assembled according to the requirements of electrical wiring switch equipment, measuring instruments, protective appliances and auxiliary equipment in a closed or semi-enclosed metal cabinet or screen, constitute a low-voltage power distribution device. During normal operation, the circuit can be switched on or off by means of a manual or automatic switch. In the event of malfunction or abnormal operation, the circuit or alarm is cut off by means of a protective appliance. Measurement instruments can be used to display various parameters in operation, and certain electrical parameters can be adjusted to indicate or signal deviations from normal operating conditions. Commonly used in all hair, distribution, substations.
2, dust explosion-proof distribution box explosion-proof distribution box uses: a reasonable distribution of electricity, convenient opening and closing of the circuit operation. It has a high degree of security protection and can intuitively display the conduction state of the circuit. It is easy to manage and helps to repair when a circuit failure occurs.
Dust explosion-proof box Dust explosion-proof zone division 20 zone: In normal operation, combustible dust occurs continuously or often, the amount of which is sufficient to form combustible dust and air mixture and/or may form an uncontrollable and extremely thick dust layer. Place and container interior.
Zone 21: During normal operation, there may be sites where the amount of dust is sufficient to form a mixture of flammable dust and air but not in Zone 20. This area includes: places directly adjacent to the charged or discharged dust points, where dust layers and combustible dust and air mixtures are likely to be generated under normal operating conditions.
Zone 22: Locations where flammable dust occasionally appears under unusual conditions and is only present for a short period of time or where flammable dust accumulates occasionally or there may be a dust layer and produce a mixture of flammable dust air.
If it cannot be ensured that the flammable dust accumulation or dust layer can be excluded, it should be divided into 21 areas.
Dust explosion-proof electrical equipment design principles: limit the maximum surface temperature of the enclosure and the use of "dust-tight" or "dust-proof" enclosures to limit the entry of dust to prevent ignition of flammable dust.
This kind of equipment will install live parts in a protective enclosure, which limits the entry of dust and isolates the ignition source from the dust to prevent explosions.
According to the difference in the dust-proof structure of the device, the device is divided into A-type device or B-type device.
Application of dust explosion-proof box:
Dust explosion-proof box is assembled according to the requirements of electrical wiring switch equipment, measuring instruments, protective appliances and auxiliary equipment in a closed or semi-enclosed metal cabinet or screen, constitute a low-voltage power distribution device. During normal operation, the circuit can be switched on or off by means of a manual or automatic switch. In the event of malfunction or abnormal operation, the circuit or alarm is cut off by means of a protective appliance. Measurement instruments can be used to display various parameters in operation, and certain electrical parameters can be adjusted to indicate or signal deviations from normal operating conditions. Commonly used in all hair, distribution, substations.
2, dust explosion-proof distribution box explosion-proof distribution box uses: a reasonable distribution of electricity, convenient opening and closing of the circuit operation. It has a high degree of security protection and can intuitively display the conduction state of the circuit. It is easy to manage and helps to repair when a circuit failure occurs.
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