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AVR Trim; high incoming line voltage every 2 minutes or so

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BillP
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AVR Trim; high incoming line voltage every 2 minutes or so

This question was originally posted by Marvin on APC forums on 3/27/2013


I keep seeing the following

Enabled AVR Trim; high incoming line voltage.

Returned from AVR Trim.

This happens over and over all day, every minute or two. Is this something I should be worried about? I'm getting the message from both an APC Smart-UPS 1500 and 3000. My vmax hits 128.8 a fair bit. Below is some data. I this something I should worry about? If not, now can I disable it from emailing me each time it goes into AVR Trim?

Smart-UPS 3000 RM 
Date Time Vmin Vmax Vout Iout %Wout Freq %Cap Vbat TupsF %VAout
03/27/2013 17:48:44 123.1 127.4 113.0 2.33 9.1 60.00 100.0 55.08 85.4 9.1
03/27/2013 17:38:44 122.4 127.4 111.6 2.33 8.4 60.00 100.0 55.08 84.5 9.1
03/27/2013 17:28:44 124.5 128.1 113.0 2.33 9.1 60.00 100.0 55.08 84.5 9.1
03/27/2013 17:18:44 124.5 128.1 112.3 2.16 8.4 60.25 100.0 55.08 84.5 9.1
03/27/2013 17:08:44 123.8 127.4 112.3 2.33 9.1 60.00 100.0 55.08 84.5 9.1
03/27/2013 16:58:44 123.1 128.1 111.6 2.00 9.1 60.25 100.0 55.08 83.8 9.1
03/27/2013 16:48:44 124.5 128.8 113.0 2.16 9.1 60.00 100.0 55.08 83.8 9.1
03/27/2013 16:38:44 125.2 128.8 114.4 2.33 9.1 60.00 100.0 55.08 83.8 9.1
03/27/2013 16:28:44 123.8 128.8 112.3 2.33 9.1 60.25 100.0 55.08 82.9 9.1
03/27/2013 16:18:44 122.4 128.8 113.7 2.33 9.1 60.00 100.0 55.08 82.9 9.1
03/27/2013 16:08:44 123.8 128.1 113.0 2.33 9.1 60.00 100.0 55.08 82.2 9.1
03/27/2013 15:58:44 123.1 128.1 113.0 2.33 8.4 60.00 100.0 55.08 82.2 9.1

Thanks! -Marvin


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BillP
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Re: AVR Trim; high incoming line voltage every 2 minutes or so

This reply was originally posted by Bernard on APC forums on 3/28/2013


Did you encounter this issue just recently? There may be something going on that is causing the line voltage to go up to ~128 Vac intermittently, I'd suggest that you contact the one in charge of the facility to find out what is causing this. Is this something that you should be worried about? I think it depends if ~128 Vac is still within the acceptable input voltage range of the devices powered by the UPS, if it is, you can adjust the high transfer voltage setting to keep the UPS from trimming the input voltage.

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BillP
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Re: AVR Trim; high incoming line voltage every 2 minutes or so

This reply was originally posted by Bernard on APC forums on 3/28/2013


Did you encounter this issue just recently? There may be something going on that is causing the line voltage to go up to ~128 Vac intermittently, I'd suggest that you contact the one in charge of the facility to find out what is causing this. Is this something that you should be worried about? I think it depends if ~128 Vac is still within the acceptable input voltage range of the devices powered by the UPS, if it is, you can adjust the high transfer voltage setting to keep the UPS from trimming the input voltage.