Siemens SITOP UPS1600 Equipment Manual page 154

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• Battery capacity
Total capacity of the installed batteries.
• End-of-charge voltage at 20 °C
The end-of-charge voltage defines the maximum battery voltage during the charging
phase. When reaching this end-of-charge voltage, the charging status changes from
"constant current" into the "constant voltage" phase. The adjustable end-of-charge voltage
is applicable for a battery ambient temperature of 20 °C. SITOP UPS1600 adapts the end-
of-charge voltage corresponding to the connected SITOP BAT1600 or SITOP UPS1100
depending on the battery ambient temperature and the battery technology. For third-
party batteries, the adaptation is based on configuration parameters battery type, typical
ambient temperature and temperature coefficient.
• Temperature coefficient
Relative dependency of the end-of-charge voltage on the ambient temperature
• Duration of the constant floating voltage charging phase
Duration of the constant voltage charging phase
• Charge current
The battery is only charged with maximum selected charge current during the "constant
current" charging phase. When using system batteries, the charge current is automatically
set, and is controlled by the temperature. When using third-party batteries, the
permissible charge current specified by the battery manufacturer must be taken into
consideration.
Further, the following device-dependent values apply:
– SITOP UPS1600 10 A: Maximum permissible charge current 3,000 mA
Derating for T
– SITOP UPS1600 20 A: Maximum permissible charge current 4,000 mA
Derating for T
– SITOP UPS1600 40 A: Maximum permissible charge current 5,000 mA
Derating for T
• Start preserve charge voltage
Voltage value for the start of the preserve charge voltage
• Stop buffering voltage
Buffering is interrupted when this threshold value is fallen below.
• Faulty battery voltage
Batteries are considered to be defective when this threshold value is fallen below.
154
> 40 °C or U < 24 V: 2,000 mA
u in
> 40 °C or U < 24 V: 3,000 mA
u in
> 40 °C or U < 24 V: 3,000 mA
u in
SITOP UPS1600 / BAT1600 / UPS1100
Equipment Manual, 07.2021, A5E37775406-11-76