APC 480 Stereo System User Manual


 
Safety: Warnings
InfraStruXure System - Installation and Start-Up 3
Total Power Off
Set the UPS DC Disconnect circuit breaker and System Enable
switch to OFF.
If applicable, set the XR Battery Enclosure DC Disconnect
circuit breaker to OFF.
Set the PDU Main Input circuit breaker
(or switch) to OFF.
Open (turn OFF) the Q1, Q2, and Q3 circuit breakers on the
PDU.
Set the upstream input utility circuit breaker to the OFF or
Locked Out position.
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