Model Meanings of Y B 2-160 M 1 2 Y: Three-phase Induction Motor B: Explosion-proof/ Flameproof 2: Second Design -160: Frame Size (Shaft Height) M: Frame Length symbol (S,M,L) 1:Core code (1, 2) -2: Poles Brief Introduction of Explosion-proof Three-phase Induction Motor YB2 series: According to the requirements of < Electrical Apparatus for Explosive Gas Atmosphere Part 1: General Request> and< Electrical Apparatus for Explosive Gas Atmosphere Part 2: Flameproof Enclosure D> of GB3836.1-2000, this explosion-proof three-phase induction motor YB2 series can be made into flameproof motors. Furthermore, this series of explosion-proof motors has also passed ATEX certifications (only for EExd BT4), and also complied with the Essential Health and Safety Requirements of CENELEC EN 60079-0:2004 and CENELEC EN 60079-1:2004) Applications of Explosion-proof Three-phase Induction Motor YB2 series: Exd II BT4: This explosion-proof motor is suitable for sites where the hazardous environment is classified into II Group, B Class, and Temperature T1-T4. Working Conditions of Explosion-proof Three-phase Induction Motor YB2 series: 1) Ambient temperature will change according to different seasons, but it should not surpass 35 (under coal mine) or 40 (factory), the lowest ambient temperature should be -15; 2) Local altitude should never surpass 1000m; 3) The maximum air relative humidity should be lower than 95% (while temperature keeps at 25)(under coal mine) or the monthly maximum mean relative temperature of the most humid month should be 90%, and meanwhile the lowest temperature of this month should not over 25 (factory). 4) Rated voltage is 380V and can generate specific voltage; 5) Rated frequency is 50Hz and can also be 60Hz. Sincerely welcome to contact us for more information on our explosion-proof motors!