Troubleshooting AB 193-EDN Average %FLA Discrepancy: HMI Setup Tips

Question:

Hello everyone, I am currently troubleshooting an AB 193-EDN and encountering an issue with the "Average %FLA" showing 70-75, while my clamp meter is reading about 4.9 on all three legs. Our E1 overload is set to trip at 20amps, so I am confused if this is a percentage display or if I need to adjust the scaling. I am aiming to show this information on a HMI for maintenance purposes. Any advice or insights would be greatly appreciated.

Top Replies

In Chapter 4 of Publication 193-UM006A-EN-P, you can find information on monitoring the average motor current. This data is presented as a percentage of the motor's rated current, which is determined by the dial setting on the E1 Plus Overload Relay. The current is displayed in increments of 5, providing valuable insights for tracking motor performance.

Your question is intriguing! The "%FLA" reference generally pertains to the percent Full Load Amperage, suggesting how hard your device is working relative to its design capacity. Theoretically, if it's reading 70-75%, then the device is operating significantly under its intended load. For your clamp meter to be reading 4.9A while the device is showing 70-75% FLA, the motor could possibly have been wired or rated for a much higher amperage. You may want to check your motor nameplate and verify its FLA rating. If your overload is set to trip at 20A and you're only reading 4.9A, it all points to the possibility that the motor is significantly underloaded or has wrong settings. As for showing this on a HMI, once you've verified and adjusted your settings, it should be a fairly straightforward process directly from your device software or connected PLC.

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Frequently Asked Questions (FAQ)

FAQ: 1. Question: What could be causing the discrepancy between the "Average %FLA" displayed on the AB 193-EDN and the readings from the clamp meter?

Answer: Answer: The discrepancy could be due to scaling issues or incorrect settings on the AB 193-EDN. It is important to verify the scaling and configuration of the device.

FAQ: 2. Question: Is the "Average %FLA" a percentage display or does it need adjustment based on actual current readings?

Answer: Answer: The "Average %FLA" is typically a percentage display based on the Full Load Amps (FLA) of the motor. However, adjustments may be needed if there are discrepancies with actual current readings.

FAQ: 3. Question: How can I ensure accurate monitoring of motor current for maintenance purposes on a HMI using the AB 193-EDN?

Answer: Answer: To ensure accurate monitoring, it is important to calibrate and verify the settings of the AB 193-EDN, including the scaling factors and configurations related to current measurements.

FAQ: 4. Question: What steps can I take to troubleshoot the issue with the "Average %FLA" display on the AB 193-EDN?

Answer: Answer: You can start by checking the scaling settings, verifying the accuracy of the clamp meter readings, and consulting the device's manual or technical support for guidance on troubleshooting and calibration.

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