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Submersible Pumps
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Are submersible pumps right for dry pit service?
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Bearing Failures
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This series of articles is intended to serve as an aid in identifying the causes of bearing failures and to provide guidance on how to avoid future problems.
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Maintain Efficiency
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When a motor is repaired or rewound, it is crucial that steps taken to maintain efficiency be coordinated. This paper explains motor efficiency, and how not to increase losses during repair.
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Retrofitting Drives
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Two case histories illustrate retrofitting of electric motor and drive systems. The first case is a pump reliability issue, and the second is a solution to a "water-hammer" problem.
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Latest Repair
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Here we consider how computers and advances in data acquisition impact on the motor repair process in a technologically advanced electrical apparatus service center.
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Unbalanced Voltages
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Causes and Consequences. The information presented in this article is intended as a primer on unbalanced voltages that affect electric motors. It concisely addresses the symptoms, causes, effects, and correction.
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Motor Vibration
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Symptom or Disease? Motor vibration is both a symptom and a disease. As a symptom, it is the precursor of trouble. As a disease, it is more widespread than most people are aware of.
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Motor Nameplate
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What does all that extra information on the nameplate mean? Do you care? The answers are "maybe," and "you probably should."
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Bearing Symptom Chart
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Want to know why a bearing failed? We address cause, not just effect. See this chart for bearing failure symptoms, causes and solutions.
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Pump Test Stand
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LONGO issues upon request a certified test report of the actual performance curve.
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