An argument in favor of IEEE-841's provision for motor bearing protection.In June, 2007, a reader asked Electrical Apparatus magazine, "How long should motor bearings last?" The answer will astound...
An argument in favor of IEEE-841's provision for motor bearing protection. In June, 2007, a reader asked Electrical Apparatus magazine, "How long should motor bearings last?" The answer will...
Facts and Fiction About Vibration
Facts can be tough—our emotions may get in the way. What we think we know is not always factual but is based on what we may intuitively feel is an undisputed truth. It is human to expect everyone...
Pumps and Systems, June 2009The pump industry is the largest purchaser of electric motors in the United States. According to the U.S. Department of Energy (DOE), electric motors consume more 50...
Pumps & Systems, June 2009The pump industry is the largest purchaser of electric motors in the United States. According to the U.S. Department of Energy (DOE), electric motors consume more 50...
Why integrating vibration monitors with process controls provides fast response to pump faults, adds predictability and avoids unexpected shutdowns.  Catastrophic damage to a 2250-hp motor...
A number of choices are available  when connecting pumps, fans and other rotating equipment to an electric motor. There are numerous mechanical and fluid coupling designs and, in some cases, a...
Measure Twice, Cut Once!
Aligning an electric motor coupled to a large air blower required multiple measurements.Around 18 years ago, a client needed assistance aligning an electric motor (more than 1,000 horsepower) coupled...
Pumps & Systems, November 2008Mechanical resonance occurs when an external source amplifies the vibration level of a mass or structure at its natural frequency. For a rotating mass like a motor or...
All electric motors (motors) have a housing that contains the working components of the motor. In the U.S., the enclosure describes this housing. The enclosure should meet specific environmental...
Pumps and Systems, February 2007All electric motors (motors) have a housing that contains the working components of the motor. In the U.S., the enclosure describes this housing. The enclosure should...
When Maintaining Motors, Proactive Strategies Are Required. Whether the subject is motors, a maintenance department or an entire organization, typical maintenance methods are categorized as...
The global economic downturn has resulted in an unprecedented attempt by world governments to help stimulate their individual economies, with the hope that these combined efforts will have a...
The global economic downturn has resulted in an unprecedented attempt by world governments to help stimulate their individual economies, with the hope that these combined efforts will have a...
Motors, Drives Improve High-Rise Condo Efficiency
Significant energy and money savings are realized when using variable speed motors controlled with drives.The Villa Magna, a 92-unit luxury condominium in Highland Beach, Fla., sits between the...
Green Motors Save GreenbacksPrepare for the new motor manufacturing changes with the Energy Independence and Security Act of 2007.The U.S. has not enacted a wide-reaching, industrial energy efficiency...
Current state and growth opportunities The low voltage motors market is highly consolidated, with the top five participants accounting for more than 75 percent of the market revenues as of 2009. Low...
Operation and Maintenance of Vertical Motors
 Construction features are key to vertical motor application and maintenance.The definite-purpose application of vertical motors dictates a number of construction features that set them apart...
Optimization Solutions
Improvements in performance and energy reduction can be achieved with smart drives and system optimization.Intelligent pumping is simply defined by ARC Advisory Group as the combination of a pump and...
Pumps & Systems, June 2007Most of the electric motor information we use on a daily basis is pretty straightforward. Voltage, amps, efficiency, and service factor are all well understood terms in...
Pumps & Systems, July 2007Last month we took a close look at the flow of voltage and current in purely resistive and inductive circuits. We showed how inductive reactance can inhibit the flow of...
Predictable Pump Motor Maintenance at a Cranberry Bog
Due to the delicate nature of the cranberry, pump failure is not an option.When a pump or motor fails at Sea Wind Cranberry Farm in Langlois, Ore., farm manager Knute Andersson's business is at stake....
InnovationIntroduced February 8, 2008, the RPMAC PM Direct Drive Cooling Tower Motor and VS1CTD Drive for wet cooling towers replaces an existing motor, jack shaft and gearbox with a more efficient...
Super E MotorIntroduced in June 2010, Super-E Motors with AEGIS Shaft Grounding Ring are used in commercial and industrial applications to drive pumps provides a path to ground for circulating...
Proper Alignment of Large Motors & Pumps
 A large utility company confronts alignment of a 5,000-horsepower motor.Installation and setup of a pump and motor can be easy for small systems. Both can be lifted with relatively small...
Pumps & Systems, June 2007In many pump installations, problems such as jams and suction loss can lead to serious damage to the motor or pump long before the thermal overloads trip. These problems...
With highly reliable electrical systems, protective relays may be called upon to operate very infrequently. However, the effects of faults and abnormal conditions can be severe and protective relay...
Pumps & Systems, October 2007With highly reliable electrical systems, protective relays may be called upon to operate very infrequently. However, the effects of faults and abnormal conditions can...
Editor's Note: Click here to see a sample alignment data form.Proper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability. For appropriate...
Pumps and Systems, June 2009Editor's Note: Click here to see a sample alignment data formProper alignment of the pump shaft with the driver can reduce vibration and significantly improve reliability....