In detail: YB (of YB2) series totally enclosed fan cooled squirrel-cage up flameproof three phase asynchronous motor is the upgrading of YB series products. It is efficient, energy saving, high starting torque, good performance, low noise, vibration, high reliability and easy maintenance, and other features. The power grade and mounting dimensions conform to IEC standards and YB series motors. 
 This series of motors, explosion-proof performance in line with GB3836.2-2000 "explosive gas atmospheres - electrical equipment - Part flameproof" d '"and the International Electrotechnical Commission standard IEC6007-provisions were made of flameproof Exd Ⅰ, Exd Ⅱ AT4 dangerous places, the Exd III BT4,, in the coal mine (non-mining face) and factory II A, II B level, temperature group T1 ~ T4 group explosive gas environment. 
 This series of motors class for shell protection to IP55 (see GB/T4942 1). 
 This series of motor cooling method is IC411 (see GB/T1993). 
 → Install the structure type 
 This series motors are the following five basic installation structure: 
 ◆ B14,: the end of the Frame without foot, end shield with flange (with screw holes). 
 ◆ B34,: the base speed the end of the foot on the end cap with flange (with screw holes). 
 ◆ B3: base with foot on the end cap flange. 
 Feet ◆ B5: base without the end. The end cap on the flange (with holes). 
 ◆ B35: Frame with foot end shield with flange (with holes). 
 This series of motors installed (see GB997) is manufactured according to Table 1. 

 → Terms of Use 
 ◆ an altitude of more than 1000M; 
 ◆ ambient air maximum temperature change with the seasons, but not more than 35 ° C (coal mine) or 40 ° C (factory); 
 ◆ the lowest ambient air temperature of -15 ° C; 
 ◆ ambient air relative humidity does not exceed 95% (when the temperature is 25 ℃), (coal mine) or the most humid month average relative humidity of 90%, while the monthly average minimum temperature is not higher than 25 ° C (factory) ; 
 ◆ rated voltage: 380V, 660V, 380/660V; 
 ◆ Rated frequency: 50Hz; 
 ◆ rated work (see with GB755) for continuous (S1) system.