©Johnstone Supply eCatalog 216

MOTOR EFFICIENCY General Information

Why Is Efficiency Important? Worldwide, motors consume between 55% and 63% of all electrical energy being produced. Recent US Department of Energy reports show How Can Efficiency Be Improved? Motors are affected by countless environmental, mechanical and electrical issues that could be • Low voltage levels cause motors to be slightly less efficient and may raise current levels beyond design. These can generally be corrected with transformer taps. • Line harmonic issues can be mitigated with various reactors, shielded cables and isolation transformers. Non-optimal load • Motors “like” to operate around 90% to 95% and lower load levels tend to make them less efficient. Overloaded situations cause significant drops in efficiency along with numerous other rectified or improved. Low or high voltage

Additional Resources American Council for Energy Efficient Economy (ACEEE) www.ACEEE.org National Electrical Manufacturers Association (NEMA) www.NEMA.org U.S. Dept of Energy, Energy Efficiency and Renewable Energy (EERE) www.eere.energy.gov Consortium for Energy Efficiency (CEE) For a list of energy efficiency incentive programs by state www.CEE1.org Electrical Apparatus Service Association (EASA) www.EASA.com U.S. Green Building Council (USGBC) For information about LEED www.USGBC.org

that energy costs could be cut by at least 18% by utilizing energy efficient motors.

issues including a significant rise in operating temperature. Mechanical issues • Misalignment, physical looseness and imbalance not only adversely affect a motor’s performance and longevity but also its efficiency. Many times minor adjustments to belts, pulleys, sheaves or bearings can add years to a motor’s life and result in big savings due to improved efficiency. The costs of replacing poorly performing motors with Premium Efficiency motors will be quickly offset by the savings in energy costs.

Federal Energy Management Program (FEMP) • Federal agencies are required by the Energy Policy Act of 2005 to purchase Energy Star™ qualified products or FEMP-designated products. In both of these cases the products fall within the top 25% of energy efficiency. Energy Independence and Security Act of 2007 • Amended in 2014 this law expanded and raised minimum efficiency levels for motors that were covered by Energy Policy Act (EPAct) of 1992 and the Energy Policy Act (EPAct) of 2005 mentioned above.

Open Drip-Proof (ODP)

Totally Enclosed Fan-Cooled (TEFC)

Motor Size (HP)

Motor Size (HP)

6-Pole (1200 RPM)

4-Pole (1800 RPM)

2-Pole (3600 RPM)

Motor Size (HP)

6-Pole (1200 RPM)

4-Pole (1800 RPM)

2-Pole (3600 RPM)

6-Pole (1200 RPM)

4-Pole (1800 RPM)

2-Pole (3600 RPM)

Motor Size (HP)

6-Pole (1200 RPM)

4-Pole (1800 RPM)

2-Pole (3600 RPM)

1.0 1.5 2.0 3.0 5.0 7.5

82.5 86.5 87.5 88.5 89.5 90.2

85.5 86.5 86.5 89.5 89.5 91.0 91.7 93.0 93.0 93.6 94.1 94.1 94.5

77.0 84.0 85.5 85.5 86.5 88.5 89.5 90.2 91.0 91.7 91.7 92.4 93.0

60.0 94.5 75.0 94.5 100.0 95.0 125.0 95.0 150.0 95.4 200.0 95.4 250.0 95.8 300.0 95.8 350.0 95.8 400.0 95.8 450.0 96.2 500.0 96.2

95.5 95.0 95.4 95.4 95.8 95.8 95.8 95.8 95.8 95.8 96.2 96.2

93.6 93.6 93.6 94.1 95.0 95.0 95.0 95.4 95.4 95.8 96.2 96.2

1.0 82.5 1.5 87.5 2.0 88.5 3.0 89.5 5.0 89.5 7.5 91.0 10.0 91.0 15.0 91.7 20.0 91.7 25.0 93.0 30.0 93.0 40.0 94.1 50.0 94.1

85.5 86.5 86.5 89.5 89.5 91.7 91.7 92.4 93.0 93.6 93.6 94.1 94.5

77.0 84.0 85.5 86.5 88.5 89.5 90.2 91.0 91.0 91.7 91.7 92.4 93.0

60.0 94.5 75.0 94.5 100.0 95.0 125.0 95.0 150.0 95.8 200.0 95.8 250.0 95.8 300.0 95.8 350.0 95.8 400.0 95.8 450.0 95.8 500.0 95.8

95.0 95.4 95.4 95.4 95.8 96.2 96.2 96.2 96.2 96.2 96.2 96.2

93.6 93.6 94.1 95.0 95.0 95.4 95.8 95.8 95.8 95.8 95.8 95.8

10.0 91.7 15.0 91.7 20.0 92.4 25.0 93.0 30.0 93.6 40.0 94.1 50.0 94.1

Open Drip-Proof (ODP)

Totally Enclosed Fan-Cooled (TEFC)

Motor Size (HP) 250.0-500.0

6-Pole (1200 RPM)

4-Pole (1800 RPM)

2-Pole (3600 RPM)

6-Pole (1200 RPM)

4-Pole (1800 RPM)

2-Pole (3600 RPM)

95.0

95.0

94.5

95.0

95.0

95.0

To understand more about the Energy Independence and Security Act of 2007 visit http://www.whitehouse.gov

137

JohnstoneSupply.com