Two Minute Tips
Stator Inter-Turn Stress with Electrical Signature Analysis in Variable Frequency Drive Applications
Incorrect settings in a Variable Frequency Drive (VFD) application have an impact on the windings of an electric motor. When a drive is not set correctly, or not tuned when not using straight volts/hertz settings, stresses occur between the turns in a winding. In some cases, this will appear as small Partial Discharges (PD), and in others it can be increased leakage between turns. When these conditions occur, they introduce small current discharges that effect the air gap magnetic field of the motor.
- Howard Penrose
- MotorDoc LLC
Five Minute Facts
What is an Arc Flash & Arc Blast?
An Arc Flash is an energy discharge of light and heat that forms when a fault occurs in an electrical circuit. The arcing results in a tremendous amount of energy being released as current flowing through ionized air. An Arc Blast, separate from an Arc Flash, is a supersonic shockwave produced when the uncontrolled arc vaporizes the metal conductors.
- Martin Robinson
- IRISS Inc.
Case Studies and Stories
Point of Care Oil Analysis Makes Sense
The 2020 calendar year has certainly brought with it many challenges for a variety of industries. The medical field, pulp and paper industry and food supply chain have all been significantly impacted by the unprecedented COVID-19 pandemic. At the grocery store, people experienced (or are still experiencing) empty shelves, limited food supply and less variety when doing weekly shopping. In March 2020, grocery and supply sales increased 29% from the previous year (3).
- Spectro Scientific
- Spectro Scientific
Five Minute Facts
Developing a Successful Motor Maintenance Program – Part 2
What makes your electric motor maintenance program a winner? Answer: A Trending Data program along with Troubleshooting and Quality Control. Watch this video to see how one part of the program, Trending, helps you reach your goal of a winning program in your facility.
- Noah Bethel
- PdMA Corporation
Two Minute Tips
Best Kept Secret in Bearing Uptime
Vari-Purpose Lubricant is cool-running, long-lasting, and water-resistant. It dramatically lengthens grease intervals, eliminates bearing failures, can extend bearing life by up to threefold, and does not harden with age.
- John Sander
- Lubrication Engineers
Five Minute Facts
Leak Detection with Ultrasound: How Does It Work?
Leaks can form practically anywhere in a plant. This includes pressurised systems and systems under a vacuum.While it is important to locate potential safety hazards from leaks, the loss of gases through leaks can be very costly.
- Adrian Messer
- UE Systems
Five Minute Facts
What Are Rolling Element Bearing Defects And What Causes Them?
Rolling element bearing defects are typically artifacts of mechanically induced stresses or lubrication issues that create small cracks or defects within the mechanical components of the bearing, leading to increased vibration.
- Pete Sopcik
- Analog Devices, Inc
Articles
The best AI for vibration condition monitoring is the one that does not remove humans from the process
Industrial Artificial Intelligence (IAI) has one of the greatest potentials to affect the way companies manage their maintenance practices. Letting Machine Learning (ML) and algorithms take more responsibility can lead to more productive work routine and less unplanned stops and the high costs associated with it. But even with several proof points, why are maintenance professionals, particularly vibration analysts, still skeptical about it?
- Rajet Krishnan
- Viking Analytics
Two Minute Tips
Steam Trap Testing
Reduce Energy Costs and Increase Process Stability with Ultrasonic Testing Equipment. Regular inspections of production equipment are essential in preventive maintenance. Early detection of damage or signs of wear leads to increased plant availability and also saves enormous costs. Is the steam trap working correctly or is it defective? Digital ultrasonic testing technology provides the answer. Energy losses are reduced and process stability is increased.
- Steffen Moeck
- SONOTEC
