Eaton 9395C-1000/1000, Инструкция по установке и эксплуатации

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Understanding UPS Operation
6-4 Eaton
®
Power Xpert
®
9395C UPS Installation and Operation Manual P-164000821—Rev 01 www.eaton.com/powerquality
6.2.4 Bypass Mode
The UPS automatically switches to Bypass mode if it detects an overload, load fault, or internal failure. The UPS
can also be transferred from Normal mode to Bypass mode manually. The bypass source supplies the
commercial AC power to the load directly. Figure 6-3 shows the path of electrical power through the UPS
system when operating in Bypass mode.
In Bypass mode, the output of the system is provided with three-phase AC power directly from the system
input. While in this mode, the output of the system is not protected from voltage or frequency fluctuations or
power outages from the source. Some power line filtering and spike protection is provided to the load but no
active power conditioning or battery support is available to the output of the system in the Bypass mode of
operation.
The internal bypass is comprised of a SCR continuous static switch. The static switch is used instantaneously
anytime the inverter is unable to support the applied load. The continuous static switch is wired in series with
the customer supplied Bypass Breaker with Shunt trip and together they are wired in parallel with the rectifier
and inverter.
CAUTION
The critical load is not protected from voltage or frequency fluctuations or power outages while
the UPS is in Bypass mode.
ATTENTION!
Les charges critiques ne sont pas protégées des fluctuations de tension ou de fréquence ni des
pannes de courant lorsque l’onduleur est en mode Contournement.
The Eaton 9395C UPS provides backfeed detection and protection through a shunt trip mechanism of the
bypass input breaker.
Static
Switch
r e t r e v n I r e i f i t c e R
Battery
Converter
Battery
Battery
Breaker
Main Power Flow
Trickle Current
Energized
De-Energized
Bypass Input
Rectifier
Input
Output
Closed
Open
Breakers Contactors
K1