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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
Why is Double Conversion On-Line UPS topology is recommended with Automatic Transfer Switch (ATS) products?

Question: Why is Double Conversion On-Line UPS topology is recommended with Automatic Transfer Switch (ATS) products?

Cause: Due to the difference in the UPS topologies, Line Interactive UPS models do not have as tight an output control as Double Conversion On-Line UPS models, so the Line Interactive UPS output voltage can be anywhere within 10-20% of the input voltage, depending on sensitivity and AVR, and can also vary depending on input voltage variation. This can cause the ATS to do frequent nuisance switching.

Resolution: It is not recommended to use Line-Interactive UPS models with Automatic Transfer Switch products - only Double Conversion On-Line UPS models should be used.

Further information is contained in White Paper 62. Refer to:
https://download.schneider-electric.com/files?p_enDocType=White+Paper&p_File_Name=SADE-5TNRLE_R1_EN.pdf&p_Doc_Ref=SPD_SADE-5TNRLE_EN

Schneider Electric Egypt and North East Africa

This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
Why is Double Conversion On-Line UPS topology is recommended with Automatic Transfer Switch (ATS) products?

Question: Why is Double Conversion On-Line UPS topology is recommended with Automatic Transfer Switch (ATS) products?

Cause: Due to the difference in the UPS topologies, Line Interactive UPS models do not have as tight an output control as Double Conversion On-Line UPS models, so the Line Interactive UPS output voltage can be anywhere within 10-20% of the input voltage, depending on sensitivity and AVR, and can also vary depending on input voltage variation. This can cause the ATS to do frequent nuisance switching.

Resolution: It is not recommended to use Line-Interactive UPS models with Automatic Transfer Switch products - only Double Conversion On-Line UPS models should be used.

Further information is contained in White Paper 62. Refer to:
https://download.schneider-electric.com/files?p_enDocType=White+Paper&p_File_Name=SADE-5TNRLE_R1_EN.pdf&p_Doc_Ref=SPD_SADE-5TNRLE_EN
 

Schneider Electric Egypt and North East Africa

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