粉尘防爆电机小知识 Dust explosion proof motor small knowledge

Explosion proof motor is a kind of motor which can be used in flammable and explosive places. It does not produce electric spark when running.

For the dust, explosive dust hazardous areas according to the division of flammable dust air mixture, the frequency and duration of dust layer thickness and classification, can be divided into 20 zone, 21 zone and 22 zone.

20: zone 20, during normal operation of combustible dust present continuously or frequently, the number of places and the inside of the container to form a dust layer of combustible dust and air mixture and / or may be unable to control and formation of an extremely thick.

21: zone 21, during normal operation, the number of possible dust to form combustible dust and air mixture is not classified as zone 0 places. The area includes a place that is directly adjacent to the point where the discharge dust is emitted, a dust layer and a place where combustible dust and air mixture may be generated under normal operating conditions.

22: zone 22, under abnormal conditions, combustible dust clouds may occur and persist for only a short period, or combustible dust accumulation or occasionally there may be a dust layer and produce flammable dust air mixtures in place.

Explosion-proof motor model in southern Anhui are YFB, YFB2 and YFB3, as the upgrade retrofit, at present mainly in the YFB2 and YFB3. Our dust explosion-proof motor used in 21, zone 22.