PdMA - A Leader in Electric Motor Testing
 
 
 
 
 
 
 
 
 
 

ISO Certication 9001

ABOUT SSL CERTIFICATES
PdMA Tip of the Week

 

%FLA...When Is It Too Low?

Having a stress fracture of your leg bone may not be obvious when sitting in the recliner with the remote. However, when you put a stress or load on the fracture, like jumping or running, pain and suffering may make you a lot more aware of the fracture.

The same can be true for a cracked rotor bar on a squirrel cage induction motor. At light loads, the impact of the fault may not be as obvious. However, loading the motor will increase the slip, current flow through the rotor bar will increase, and non symmetrical thermal heating surrounding the defect will make the fault more obvious through current signature analysis or rotor influence testing.

So when is %FLA too low? The answer is…there is no low limit to the %FLA for testing motors. Rotor bar anomalies have been identified even in lightly loaded scenarios and trends and comparisons can still be made at similar low loads. So, although a heavier load on a motor will significantly increase your chance of seeing rotor defects, you should not miss the opportunity to capture running data on a motor even at lower %FLA.

Click here to read a rotor bar case study.

You are invited to submit an Electric Motor Testing Tip of your own and receive a free PdMA® mug or hat if we publish it! Contact Lou at lou@pdma.com.

 
 

%FLA...When Is It Too Low?

September 8, 2014
Click here to read more.

Click Here
to Read More Tips.

 
Learn More - Videos

Click on a topic below to watch a short video of the subject.

Why MCEMAX®?
Power Circuit Fault Zone
Power Quality Fault Zone
Rotor Fault Zone
Stator Fault Zone
Air Gap Fault Zone
Insulation Fault Zone
Quality Assurance
Insulation Case Study

 

Simulating Insulation Systems Under Various Environmental Conditions
Click here to read more.

Combining Static and Dynamic Testing - Preventing a Motor Catastrophe
Click here to read more.

Motor Efficiency and Fault Zone Analysis
Click here to read more.

Motor Repair or Replacement? The Green Solution
Click here to read more.

Click Here to Read
More Artcles.

PdMA® Corporation Releases MCEGold® 2.6.2
To read more about release click here.

Announcing the New M-Series MCEMAX® Tester
To read more about the release click here.

PdMA® Corporation Releases MCEGold® 2.6.1
To read more about release click here.

2014 Training Schedule Posted
The PdMA® training schedule for 2013 has been posted.
Click here to view the schedule.

2012 Best Maintenance Reliability Program Winner
Click here to read about the award

Introducing MTAP3
The affordable MTAP3 offers the ability to safely capture data in many of the smallest enclosures where the MTAP2® cannot be installed.
Click here to learn more.

Click Here
to Read More News.