YB3 series high efficiency flameproof three-phase asynchronous motor (hereunder referred to as the YB3 motor) is our company uses advanced technology from domestic and overseas , combining the actual situation of Chinese Explosion proof electric motor1 s industry and market ,we design and development of efficient basic series, YB3 series is the upgrade of YB2 series motors, which in line with the third efficiency standard in the provisions of GB 18613-2012"the energy efficiency limit and the energy efficiency rating of small and medium-sized three-phase asynch ronous motors and IEC60034-30-2008 efficiency standard level IE3. In GB18613-2012<small and medium sized three-phase asynchronous motor limited value of energy efficiency and energy efficiency grade> This series motor conforms to the national standard GB3836.1 - 2010<explosive environment Part 1: general requirements for equipment>and GB3836.2-2010<explosive environment part 2: the flameproof shell" d "protection equipment) ,At the same time, the flame-proof structure and parameters design with reference to the IEC60079-1>the explosion-proof electrical equipment enclosure structure and test>and EN50018<explosive environment with" d "electrical equipment>standard. The motor is EX type. Explosion-proof standards are Exd I Mb, Exd IIAT4 T4Gb Gb, Exd II B, Ex2dCT4Gb, respectively applicable to fixed equipment in coal mine and factory level with A grade II, IIB, IIC, temperature classes for T1 ~ T4 group of sites with explosive air mixture.