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Updates now available for EASA Technical Manual

EASA Technical ManualUpdates to EASA's most comprehensive technical resource are now available for FREE to association members. Reviewed by EASA's Technical Services Committee and revised by staff, important updates and inclusions have been made to: 

  • Section 2: AC Machines
  • Section 7: Electrical Testing
  • Section 9: Lubrication
  • Section 10: Mechanical
  • Section 12: Tech Notes



Sid Seymour, EASA Chairman of the Board

Tech Tip: Checking Winding Data, Test Running Multiple Power and Frequency Rated Motors for Use on VFDs

Some motors rated for use on VFDs have multiple nameplate ratings for power, frequency (speed) and current. For example:  

Power (kW) Frequency (Hz) Voltage Current (amps)
21 20 95 170
90 84 400 180
90 118 400 166


To check winding data use the base rating, which is the lowest frequency rating at the highest power rating. In the example, it is 90kW at 84Hz. The voltage rating for frequencies above the base rating typically are the same as that of the base rating, which is 400 volts in this example. To test run the 400 volt, 84Hz motor at 60Hz, determine the voltage for the same volts/Hz ratio as for the base power rating. In this example, that would be 400/84 x 60 = 286 volts. If variable voltage is available, no load test at 286 volts; and if only step voltages are available, test at 230-240 volts.

Marketing Tip: Why Is It a Good Idea to Regularly Track Social Media Activity?

It’s relatively easy to post content to social media, but it’s not as easy to regularly study your past posts and examine reactions. So, why is it a smart idea to step back and look at what you’re doing?

It Helps You Understand Your Audience
Not only is what you post important but also when you post. If you post when your fans are online and at their highest level of alertness, your posts will drive more engagement and traffic. Carefully dissect your social data and find your unique best time to post on social media.

Analysis Helps You Realize What Your Best Social Networks Are
Not all social networks will work perfectly for your company. The only way to confirm which social networks work best is through experimentation and using your analytics to measure how much traffic and engagement you are receiving.

Social Data Can Help You Create Better Content
When you track your social networks, you will understand what content drives the best results. You will see if images, links or videos perform better. You’ll also be able to gauge which articles perform better than others.

Social Metrics Can Help You Create a Better Strategy
If you regularly track what people are saying online about your business or your product, then you can modify your marketing strategy to better connect with current and potential customers.

Social Media Analytics Shows You How a Social Media Campaign Is Performing
Once you launch a social media campaign, you should regularly track it. The analytics will tell you if you should make minor adjustments to the campaign or if you should abort the campaign and start fresh later.

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