YBX3 Series High Efficiency Explosion-Proof Motors

Description

YB3-63–355 Flameproof Three-Phase Induction Motors The YB3-63–355 series flameproof three-phase induction motors are our latest generation of products, developed on the basis of the YB and YB2 series by incorporating advanced technologies in electromagnetic design, manufacturing processes, and materials. These motors offer the advantages of high efficiency and energy savings, generous temperature rise margin, long service life, excellent performance, low noise, advanced flameproof construction, high reliability, and ease of operation and maintenance.

The efficiency of this series complies with GB 18613-2006 Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Small and Medium Three-Phase Induction Motors, meeting Energy Efficiency Level 2. The power ratings and installation dimensions align with IEC standards and are identical to those of the YB and YB2 series motors.

This series conforms to:

GB 755-2008 Rotating Electrical Machines – Rating and Performance

JB/T 7565.1-2011 *Technical Specifications for YB3 Series Flameproof Three-Phase Induction Motors (Frame Sizes 63–355)*

The explosion-proof performance complies with:

GB 3836.1-2010 Explosive Atmospheres – Part 1: Equipment – General Requirements

GB 3836.2-2010 Explosive Atmospheres – Part 2: Equipment Protection by Flameproof Enclosure “d”

The motors are designed as flameproof types ExdI Mb, ExdIIAT4 Gb, and ExdIIBT4 Gb, suitable for hazardous locations in underground coal mines (excluding coal face excavation areas) and factory environments with explosive gas atmospheres of Classes IIA and IIB, temperature groups T1–T4.

Operating Conditions:
Altitude: Not exceeding 1000m
Ambient Temperature: The maximum ambient temperature varies with seasons but shall not exceed 35°C (for underground coal mines) or 40°C (for factories).
minimum ambient temperature -15°C
Ambient Humidity: The maximum relative humidity of ambient air shall not exceed 95% (at 25°C) for underground coal mines; or the monthly average relative humidity in the wettest month shall not exceed 90%, with the monthly average minimum temperature not exceeding 25°C for factories.
Rated Voltage: 380V, 660V, 1140V, 380/660V, 660/1140V
Rated Frequency: 50Hz
The enclosure protection class of this series is IP55, and the cooling method is IC411.