6
B
ATTERY
C
HARGER
The battery charger utilizes energy from the utility power and precisely
regulates it to continuously “float charge” the batteries. The batteries are
being charged whenever the S4K
2U
UPS is plugged in, even
when the
UPS is not turned on.
DC
TO
DC C
ONVERTER
The DC to DC converter utilizes energy from the battery system and
raises the DC voltage to the optimum operating voltage for the inverter.
This allows the inverter to operate continuously at its optimum efficiency
and voltage, thus increasing reliability.
B
ATTERY
The S4K
2U
UPS utilizes valve-regulated, nonspillable, flame
retardant, lead acid batteries. To maintain battery design life, operate the
UPS in an ambient temperature of 68°F to 77°F (20°C to 25°C). Optional
external battery cabinets are available to extend battery run times.
D
YNAMIC
B
YPASS
The S4K
2U
UPS provides an alternate path for utility power to the
connected load in the unlikely event of a UPS malfunction. Should the
UPS have an overload, overtemperature, or UPS failure condition, the
UPS automatically transfers the connected load to bypass. Bypass
operation is indicated by an alarm and illuminated Bypass LED (other
LEDs may be illuminated to indicate the diagnosed problem). To manually
transfer the connected load from the inverter to bypass, press the
Standby button once.
NOTE
The bypass power path does NOT protect the connected
equipment from disturbances on the utility supply.
Summary of Contents for S4K2U Series
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