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Phantom Voltage - Neatural and Ground

APC UPS Data Center & Enterprise Solutions Forum

Schneider Electric support forum for our Data Center and Business Power UPS, UPS Accessories, Software, Services, and associated commercial products designed to share knowledge, installation, and configuration.

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blackAces_apc
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Phantom Voltage - Neatural and Ground

This was originally posted on APC forums on 4/26/2015


May i know if this phantom voltage is also applicable when the UPS is On Line mode? I saw on the KB question regarding the voltage reading between the N-G when the UPS is On battery. I would like to verify this phantom voltage can't damage to connected equipment when UPS is on Battery Mode but how about when the UPS is On Line it will be the same?

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blackAces_apc
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698

Re: Phantom Voltage - Neatural and Ground

This was originally posted on APC forums on 4/28/2015


ok thanks for the info angela, i asking this because our client required L-N-G line orientation for their test equipment and also the test equipment required N-G = 0V thats why i try to verify this is phantom voltage can't damage the connected load even we can measure a voltage between the Neutral and Ground.

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BillP
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698

Re: Phantom Voltage - Neatural and Ground

This reply was originally posted by Angela on APC forums on 4/27/2015


Hi Hanz,

Could you please confirm what exact UPS model your question is in relation to so that we can be absolutely sure of the correct answer? As far as I know, this will not be the same when the UPS is online but would double check based on your UPS model.

blackAces_apc
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698

Re: Phantom Voltage - Neatural and Ground

This was originally posted on APC forums on 4/27/2015


Hi Angela

This particular for SURT6000xli and surt2000xli.

Regards

BillP
Administrator Administrator
Administrator
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698

Re: Phantom Voltage - Neatural and Ground

This reply was originally posted by Angela on APC forums on 4/27/2015


Ok, did some checking. Just to be clear, the UPS would never allow anything through in any mode of operation that could damage attached equipment. As far as the phantom/floating voltage, my original thought was confirmed with local Smart-UPS expert I asked.

blackAces_apc
Commander
Commander
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699

Re: Phantom Voltage - Neatural and Ground

This was originally posted on APC forums on 4/28/2015


ok thanks for the info angela, i asking this because our client required L-N-G line orientation for their test equipment and also the test equipment required N-G = 0V thats why i try to verify this is phantom voltage can't damage the connected load even we can measure a voltage between the Neutral and Ground.