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Stepped VS pure Sine wave output. Stepped bad for my MacPro??

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

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hassiman_apc
Ensign
Ensign
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1
125

Stepped VS pure Sine wave output. Stepped bad for my MacPro??

This was originally posted on APC forums on 9/17/2008


Just wondering if the stepped power output of the APC BACK UPS 1500 VA XS was safe to use with a MacPro and Cinema Display?

Message was edited by: hassiman

Message was edited by: hassiman


Accepted Solutions
BillP
Administrator Administrator
Administrator
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0
124

Re: Stepped VS pure Sine wave output. Stepped bad for my MacPro??

This reply was originally posted by Angela on APC forums on 9/18/2008


some Mac customers experience a slight humming from their power supply when the UPS runs on battery. others work just fine.

you also need to make sure that the 1500VA Back UPS model (which can handle 865 watts) is sized correctly according to your power supply. you should find out the wattage in your power supply and multiply it by 1.5 if it is power factor corrected. if you don't and your power supply is a PFC. you can run into overload problems as well.

See Answer In Context

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BillP
Administrator Administrator
Administrator
0 Likes
0
125

Re: Stepped VS pure Sine wave output. Stepped bad for my MacPro??

This reply was originally posted by Angela on APC forums on 9/18/2008


some Mac customers experience a slight humming from their power supply when the UPS runs on battery. others work just fine.

you also need to make sure that the 1500VA Back UPS model (which can handle 865 watts) is sized correctly according to your power supply. you should find out the wattage in your power supply and multiply it by 1.5 if it is power factor corrected. if you don't and your power supply is a PFC. you can run into overload problems as well.