Older, Wiser...and More Efficient?

Mon, 11/21/2016 - 08:54 -- Decatur Industr...

 

According to the Gallup Poll in January of 2015 only one-third of the baby boomers in the US were still working. Worse, the Star Tribune research finds that as older workers retire productivity slows due to the loss of senior working efficiency and influence on younger workers efficiency. If your facility is facing a similar retirement era, visit the PdMA website to read the latest article Tips for a Lean Approach to Motor Reliability.

We Are Hiring Drivers

Mon, 11/07/2016 - 09:17 -- Decatur Industr...

We are hiring drivers! All you need is a Class C drivers license. Decatur Industrial Electric provides excellent pay and benefits and is hiring NOW! What are you waiting for? Military veterans are encouraged to apply.
Commercial driving experience and an up-to-date D.O.T. medical card is preferred

Motor Tip: Change from Baseline

Thu, 11/03/2016 - 10:01 -- Decatur Industr...

We know phase resistance of an electric motor can change drastically with temperature. As temperature rises the resistance rises as a result of copper having a positive temperature coefficient. However, on a three phase motor even though the phase resistance values change with temperature the balance of resistance between the three phases should not change. For your medium and high voltage motors (> 4kV) the balance of resistance is often very low (<1%).  In fact, it is quite common to see values of imbalance in the one-hundredths of a percent (ex. .03%).  The standard MCEGold balance of resistance setpoints for a medium voltage motor is 1% (caution) and 2% (alarm) so a baseline balance of resistance of .03% would have to increase ~3000% to reach the 1% alarm setpoint. Therefore, it is important for you to consider establishing a change from baseline alarm setpoint for your balance of resistance in these situations to alert you to large changes in the circuit condition.
 
Thanks to this tip from our friends at PdMA. 

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