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This new video provides a guide on performing a single-phase rotor test on a three-phase squirrel cage motor to check for open rotor bars. It begins with an introduction to the test's purpose and the importance of ensuring the stator winding is free from grounds, shorts, or opens by conducting preliminary tests such as insulation resistance, surge, and lead-to-lead resistance tests. The video then details the identification and setup of the necessary test instruments, including a single-phase power supply, digital voltmeter, and clamp-on amp meter.

The procedure involves correctly connecting the stator for the test, applying single-phase voltage, and measuring the maximum and minimum amperage during the test. By rotating the motor shaft manually and monitoring the current with a clamp-on amp meter, viewers can note the highest and lowest current values. The video explains how to calculate the test current variation and interpret the results to determine if the rotor has open bars.

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The new EASA Learning Center is now online and ready to provide industry-specific training. You are now able to provide your employees with access to much of EASA's training without leaving your service center! Access to EASA’s Online Learning Center is sold as 12-month subscriptions and targets employees of all skill levels.

ERT Certificate Program
Also delivered through the EASA Learning Center is the new Electromechanical Repair Technician (ERT) Certificate Program. The ERT Cetificate Program provides new, existing, and potential employees in the electromechanical repair industry a structured learning path to become a well-rounded, service center technician. 

EASA LEARNING CENTERERT PROGRAM

Crimping lugs for electrical connections on electric motors is a necessary function. However, properly crimping connectors and lugs to cables is often overlooked. If the lug is crimped too loose, it can fail. If the lug is crimped too tight, it can fail as well. Many service centers use a manual crimper, so it will only be as tight as the technician's discretion. There are tools on the market that will not release until the proper force is reached. These crimping tools utilize rechargeable batteries capable of hundreds of crimps per charge. Some have Bluetooth available that enables a download of the crimp data and alerts for recharging. Using these Smart tool crimpers improves quality by eliminating inconsistencies from the crimping process. The range of battery-powered crimpers is from 18-gauge (.82 mm) up to 1000 MCM (500 mm2 ). The Greenlee Gator, Brileine, AMZCNC 10 or Vevor crimper can meet this standard.