Increased safety type "E" motor and non-spark type "nA" motor are very similar in general structure, and even in terms of test items and inspection requirements are relatively similar....
Electrical equipment for explosive environments is divided into classes I, II and III. Type I Class I electrical equipment is used in coal mine gas environment. 注：I类防爆型式考虑了甲烷和煤粉的点燃以及地下用设备增加.......
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Hazardous sites are divided into zones based on the frequency and duration of the explosion environment. Explosive gas dangerous sites are divided into three areas: 0, 1 and 2.....