1.Rated voltage: 380V/660V or on request.
2.Rated frequency: 50Hz or 60Hz
4.Explosion-proof marks：Exd I，Exd II AT4．Exd II BT4
5.Working condition：altitude below 1000m．
6. 7.Protection class：IP55
9. Ambient temperature: -15℃～40℃
9.Altitude: not exceeding 1000meters above sea level.
11.Relative humidity: less than 90%
YB3 series flameproof three-phase asynchronous motors are latest products developed by our company combining with home and abroad electromagnetic structure, technique and material etc based on YB and YB2 series of motors. This series of motors have many merits，such as high-efficiency, energy conservation, big margin of temperature rise, long service life, excellent performance, low noise, advanced explosion-proof structure, high reliability and convenient operation and maintenance etc. The efficiency index of this series motors conforms to the energy efficiency grades 2 of specified in GB18613-2006 Minimum allowable values of energy efficiency and the energy efficiency grades for small and medium three-phase asynchronous motors. Power class and the installation dimensions accord with IEC standard , also completely are as same as YB and YB2 series three-phase induction motors.
YB3 series of motors meet GB755-2008 “Rotating electrical machines-Rating and performance”, company standards of Q/320206JLAB01-2009 “ Technical specification of YB3 series of flameproof three-phase induction motor (Frame Number: H63~355)”. Their flameproof performance should meet GB3836.1-2010《Explosive atmospheresPart1: Apparatus General requirements》 and GB3836.2-2010《Explosive atmospheres, Part2: Apparatus protected by the crust for flameproof “d” 》. The flameproof types of this series motors are ExdI, ExdIIAT4 and ExdIIBT4，and suitable for the non-mining working area in underground mine or the dangerous locations in factories where there are the explosive gas of class IIA and IIB and temperature of class T1～T4. YB3 series motors have the following types: humid tropics type (YB3-TH), dry tropics type (YB3-TA), outdoor type (YB3-W), outdoor medium-anticorrosion type (YB3-WF1) and outdoor humid type (YB3-THW),outdoor dry tropics type (YB3-TAW), indoor tropics type (YB3-T)、outdoor tropics type (YB3-TW).