Smart-UPS RT 3000 XL with input power problems

[jyost_apc]

This was originally posted on APC forums on 4/28/2010

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I started getting e-mails from the battery in question stating "Warning - UPS: On battery power in response to rapid change of input.". This would immediately be followed up another message saying "Informational - UPS: No longer on battery power.".

After logging in and looking at the battery i see that the last battery transfer is saying "Unacceptable utility voltage rate of change". Also the Input Voltage is 206VAC and the Output Voltage is 209VAC. I'm not quite sure what this means, i'm guessing it means it's outputting more than it's brining in? I'm not entirely sure why - there have been no changes to the power circuit.

Any information you folks could provide would be much apprecaited.

[jyost_apc]

This was originally posted on APC forums on 4/28/2010

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I started getting e-mails from the battery in question stating "Warning - UPS: On battery power in response to rapid change of input.". This would immediately be followed up another message saying "Informational - UPS: No longer on battery power.".

After logging in and looking at the battery i see that the last battery transfer is saying "Unacceptable utility voltage rate of change". Also the Input Voltage is 206VAC and the Output Voltage is 209VAC. I'm not quite sure what this means, i'm guessing it means it's outputting more than it's brining in? I'm not entirely sure why - there have been no changes to the power circuit.

Any information you folks could provide would be much apprecaited.

[juangele_apc]

This was originally posted on APC forums on 4/29/2010

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Hi,

If you can provide us the [data logs|http://nam-en.apc.com/cgi-bin/nam_en.cfg/php/enduser/std_adp.php?p_faqid=9321&p_created=1213880132&p...] from the network management card, that would be a big help. Also, add the the firmware that the card is using under, administration>general>about.

[jyost_apc]

This was originally posted on APC forums on 4/29/2010

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Attached files as requested.

Also as requested firmware information:

Model Number: AP9619
Serial Number: BA0905008652
Hardware Revision: A10
Manufacture Date: 01/28/2009
MAC Address: 00 C0 B7 D6 B6 CE
Management Uptime: 164 Days 3 Hours 45 Minutes

[juangele_apc]

This was originally posted on APC forums on 4/29/2010

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Hi Jyost,

Looking at the data logs, seems like you have you a 10min interval. I would suggest you to change it like for a minute so we can map out the Input voltage change(Logs>Data>Interval). Also, can u provide me the screenshot of what you have under, UPS tab>Configuration>Power? I'd like to know what setting you have there.

[jyost_apc]

This was originally posted on APC forums on 4/29/2010

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Changed timer to 1 min - waited 10 mins and recaptured logs (attached). Also attached screenshot as requested.

Thanks in advance

[BillP]

This reply was originally posted by Laurie on APC forums on 4/29/2010

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It sounds like normal operation to me... The topology of this UPS is to essentially recreate the power it's outputting, so it makes sense that the input and output aren't identical. Also, the "rate of change" reason for going to battery is caused by just that - the voltage fluctuated rapidly enough that the UPS determined it needed to go to battery to provide sufficient power to your equipment. Your data logs aren't likely to catch it since it sounds like a very brief instance.

[juangele_apc · Accepted solution]

This was originally posted on APC forums on 4/30/2010

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Hi,

Seems like there is really a rapid fluctuation coming from the input source and as what buzz said, the rate of change is the reason for the UPS to go on battery. The reason for having a 209V is because of the floating voltage. Since the the topology of this UPS is an Double Online Conversion, meaning all input voltage is passing through the battery (AC-DC) then to the output(DC-AC)