General Description
YB3 series flameproof type three-phase asynchronous motor is our upgraded explosion-proof motor basic series from YB2 series, the series motor has the advantages of small volume, light weight, beautiful appearance, reliable operation, long service life, excellent performance as well as convenient installation, operation and maintenance.
The series motor’s power level, installation dimensions comply with IEC standard, with coincident corresponding relationship with German standard DIN42673. It is conducive for the export equipment matching and introduction of spare parts for equipments.
The series motor’s flameproof performance is in accordance with GB3836.1-2010 Explosive atmospheres- Part 1: Equipment. General requirements & GB3836.2-2010 Explosive atmosphere-Part 2:equipment with flameproof enclosure “d” protection, it was also made into flameproof type in accordance with IEC79-1, BS4683 & EN50018 provision. The flameproof mark is Ex d I Mb, Exd IIAT4 Gb, Ex d IIB T4 Gb, which is applicable for explosive atmosphere.
For Ex d I Mb, equipment installed at coal mine methane explosive environment, has “high” protection level. This level has sufficient safe performance, it cause impossibility to be the ignition source during equipment normal running, or under expected failure conditions for the period between gas suddenly appeared and equipment power off, it is applicable for electrical equipment for non excavation working face.
Ex d IIAT4 Gb, Ex d II B T4 Gb are applicable for equipments with explosive gas environment except coal mine, with “high” protection level, it is not a source of ignition during normal running or under expected fault conditions.
Based on YB3 basic series motor, it can also be made into YB3-W outdoor type, YB3-TH indoor humid tropics type, YB3-WTH outdoor humid tropics type. YB32-TA indoor dry tropics type, YB3-WTA outdoor dry tropics type, YB3-T indoor tropics type, YB3-WT outdoor tropics type & YB3-WF1 outdoor medium corrosion type etc. climate conditions.
The series motor efficiency index reaches grade 3 efficiency rating specified in The minimum allowable values of energy efficiency and the energy efficiency grades for small and medium three-phase asynchronous motors, GB18613-2012 standard, which is equivalent to the IE2 of IEC60034-30.
