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Tag: AEGIS

Three Types of Bearing Current: Mitigation

  Part 2:  Damage Mitigation Strategies In the last post, AEGIS discussed the three types of destructive motor bearing current caused by VFDs:  Shaft voltage discharge,...

The Five Most Common Causes of Bearing Failure

 Although we talk in this blog mainly about electrical bearing damage, there are plenty of other sources of damage and failure modes for motor bearings. Although...

Why Should You Care About the Total Cost of Owning an...

 Last month, Aegis discussed Volume 3 of the 2021 MSMA report on potential savings through improved efficiency. Let's expand on how you can apply the findings...

PRO Rings Protect Roller Bearings in Paper Mill

 We have previously written about AEGIS® Shaft Grounding Rings improving reliability in paper mills.  Here is a new case study done by the AEGIS...

VFD Switching Frequency & Bearing Current

 At almost every Q&A session, the question comes up: "Does VFD switching frequency affect the risk of electrical bearing damage?"  This is a good...

How Can Insulated Bearings Get Electrical Damage?

 A couple of months ago, we published a Q&A post including an account of electrically damaged insulated bearings.  We got a few questions about...

High Proof Shaft Grounding: AEGIS Rings in an Ethanol Plant

 This blogpost is adapted from a story published at ChemicalProcessing.comIn early 2017, at Red Trail Energy’s ethanol plant in North Dakota, several large motors’ ball bearings were...

Electrical Bearing Protection Q&A Part 10

 Q1.  How do I implement a plantwide program to adopt AEGIS shaft grounding on all of our VFD-fed motors?A1.  We run into that every...

Electrical Bearing Protection Q&A – Part 4

 Part 4 in a series of questions and answers from our Q&A webinars.Q1:  Is the grounding of the motor important, and if so, what kind...

Electrical Bearing Protection Q&A – Part 3

 Q:  If you use insulated bearings without an SGR, where will the current from the shaft go?A:  First off, there are two levels of...