AP4452A Automatic Transfer Switch "Efficiency"

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I'm working on a Load Calculation for a console, and this console has an AP4452A Automatic Transfer Switch to manage power from two redundant power inputs. I wanted to ask if SE / APC has any Technical Note with efficiency information for that ATS. Also, I wonder if "efficiency" would be the correct way to take that ATS into account, maybe I should only consider a fixed power consumption for the ATS to power its internal circuits, and 100% efficiency. Anyone has any experience with this? And I couldn't find neither efficiency nor power consumption in any AP4452A documentation, I'd appreciate if SE could point me to that. Kind Regards.

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