| Security code： | huininggroupVlT9tD8uWs4vugO497 |
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| add time： | 2016-01-18 14:18:14 |
| recommendation： |  |
Scope of application:
1 District, 2 District dangerous places.
IIA, IIB, IIC explosive gas environment.
Combustible dust environment zone 21, zone 22, zone 20.
Ambient temperature group for T6 - T1.
The meaning of the applicable scope of the explosion proof union:
1.1 division of hazardous areas in explosive gas environment
0 zones: the environment for continuous or prolonged explosive gas mixtures.
1 areas: in the normal operation of the environment may be an explosive gas mixture of the environment.
2 area: in the normal operation of the environment can not be an explosive gas mixture or even if there is only a short time there is a mixture of explosive gas environment.
Zone 0 is generally only exists in a sealed container, tank and other internal gas space, in the actual design process 1 areas have also rarely exist, most belong to area 2.
1.2 explosion proof electrical equipment is divided into two categories:
Electric equipment for underground coal mine
Type of electrical equipment for use in places other than mine
1.3 class II electrical equipment, according to the maximum test safety clearance or minimum ignition current ratio of the explosive gas mixture, divided into II B, II A, II C three categories, and according to the maximum surface temperature is divided into T1-T6 six groups.
1.4 explosive gas mixture according to the ignition temperature of the packet.
1.5 explosive gas mixtures, according to their maximum experimental safety clearance (MESG) or the minimum ignition current ratio (MICR) classification.
