American Power Conversion 480kW400V - Manual (Page 5)

Stop/Start UPS and Operating the External Service Bypass
990-4058
User Guide APC Silcon 480kW 400V UPS 5
2.3 Stop UPS (for complete power down)
2.3.1 Switching off the UPS
CAUTION!
If the UPS system is equipped with a Service Bypass Panel, and if the load must remain
energized by mains, refer to the Operating Service Bypass Panel sections in this guide before
proceeding
Green /ON
Red / OFF
WARNING!
TEST BEFORE YOU TOUCH!
A special design feature switches the system into bypass operation in the event of internal power
supply failure or controller circuit failure to ensure uninterrupted output voltage.
Because of this special feature, the UPS may contain output voltage even when it is switched off.