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ZY120 6-20kVA (11) User Manual EN rev.04.doc
output power.
3.4 Battery Charger
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 UPS is
connected to utility power.
3.5 DC-to-DC Converter
The DC-to-DC converter utilizes energy from the battery system and raises the DC voltage to
the optimum operating voltage for the inverter. The converter includes boost circuit which is also
used as PFC.
3.6 Battery
The 6K/10K Standard include value-regulated, non-spillable, lead acid batteries inside. To
maintain battery design life, operate the UPS in an ambient temperature of 15-25C.
3.7 Dynamic Bypass
The 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, over temperature or any other
failure condition, the UPS automatically transfers the connected load to bypass. Bypass operation
is indicated by an audible alarm and illuminated amber Bypass LED. To manually transfer the
connected load from the inverter to bypass, press the ON/OFF button or Manual Bypass button
once.
NOTICE：The bypass power path does NOT protect the connected equipment from disturbances
in the utility supply.
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