3.3 Inch Electronically Commutated Motor

• Commercial refrigeration walk-in coolers and freezers, air-movinig applications demanding high efficiency and dependability
  
• Efficiences three times higher than shaded pole motors and 40% higher than PSC
  
• Ball Bearing with low temperature grease
  
• Standard thru-bolt configuration
  
• All Angle Mount
  
• Total Enlcosed, Air Over
  
• Rotation viewed opposite shaft end
  
• Water slinger
  
• Automatic overload
• 50/60 Hz, single phase

Lau Series LAD and LHAD Air Curtains can be used in a variety of locations and applications. They are designed to keep air, dirt, dust, fumes, insects, and pollen outside while maintaining a cleaner healthier environment inside.

Typical applications include fly and insect prevention at restaurant doors, thermal barriers at shopping mall entrances, and wind resistance and temperature separation at factory freight doors.

Lau Air Curtains save energy and lower building operating costs because they reduce heat loss and gain through open doors and windows while enabling traffic to flow unobstructed. They also improve energy efficiency by reducing the load on the buildings HVAC system while maintaining a comfortable air temperature indoors.

Beware Bearing Currents….Marathon Electric Announces “SGR”

Tired of premature bearing failures?....me too! It gives me great pleasure to introduce the Shaft Ground Ring or SGR, the latest innovative product addition to our extensive line of field installable kits. Given the fact that we are the leaders in Variable Frequency Drive (VFD) motors with the MAX motor family, it should be no surprise that we have raised the bar again with this new solution to a very real problem with VFDs. We have spent hundreds of hours testing and understanding the interaction between the VFD and the AC induction motor, we discovered that the problem exists with all VFDs and all the motors they control. While VFDs deliver impressive energy savings (up to 30% or more), they also introduce harmful common mode voltages (CMV) onto the shaft of those motors. The resulting currents will damage motor bearings, which result in costly downtime and premature motor failure. Any truly “green” process must achieve sustainability as well as energy efficiency. The SGR kits make this possible by dramatically extending the lives of motors controlled by VFDs.