Siemens introduces 3 new energy-efficient NEMA motor lines


Motors, Drives, and Motion Control

Siemens’ new 3-phase NEMA Design B motors combine special cooling-fin design and internal cooling method to minimize heat build-up for longer life. Shown is GP10A cast-aluminum frame motor.

Atlanta, GA —Impact of energy costs on operating electric machinery continues to put energy-efficient motors at center stage. Pushing this trend, Siemens Energy & Automation Inc ., in mid-February 2006, introduced three new ac motor lines designed to help motor users lower energy costs and extend service life. Motors include high-efficiency units that meet or exceed U.S. Energy Policy Act (EPAct) requirements and “ultra-efficient” units that exceed NEMA (National Electrical Manufacturers Association) Premium standard by up to 10%, says Siemens.
The three new product lines comprise:
• General-purpose, die-cast aluminum frame motors with enhanced mounting flexibility for applications such as air handling, conveyors, pumps, and compressors (GP10/100A);
• General-purpose, cast-iron frame motors (GP10/100); and
• Severe-duty, cast-iron frame motors (SD10/100). Definite-purpose version motors, exceeding the demanding requirements of IEEE standard 841, also are available in this category for critical petroleum, chemical, and paper-processing environments.
All three motor lines come in a high-efficient design (designated 10) or NEMA Premium ultra design (designated 100). Ultra units also incorporate special stator design and a unique die-cast copper rotor—said to be the largest currently available—that provide the added efficiency of these motors, according to Siemens.
“Our latest NEMA motor innovations will provide significant energy and cost savings to [the nation’s most energy-intensive] industries,” says John Caroff, Siemens marketing manager for low-voltage motors. “These savings can be realized simply by using energy-efficient equipment and sound energy-management practices.”
These introductions represent phase 1 of Siemens’ multi-million dollar R&D investment designed to lower total cost of motor ownership. Motors are available up to 20 hp (phase 1). Near future expansion plan includes aluminum-frame motors to 30 hp, cast-iron frame motors to 400 hp, and the addition of definite-purpose designs, such as U.L.-listed explosion-proof motors.

—Control Engineering Daily News Desk
Frank J. Bartos, executive editor,

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