12.5 Electrical Characteristics (Intermediate DC Circuit)
Item Unit
Rated p ower (k V A )
25 0
Max. charging current
1
A 75
Rated nominal battery bus voltage Vdc 336 to 528
Quantity of lead-acid cells (nominal) Block 28 to 44 (12 Vdc)*
Float voltage V/cell (VRLA)
2.25 (selectable from 2.20 V/cell to 2.30 V/cell)
Constant current and constant voltage charge mode
Temperature compensation mV/°C/cl -3.0 (selectable from 0 to -5.0 around 25 °C or 30 °C, or inhibit)
Ripple current % C
10
≤ 5
Boost voltage V/cell (VRLA)
2.35 (selectable from 2.30 to 2.35)
Constant current and constant voltage charge mode
Boost control
Float-boost current trigger 0.050C
10
(selectable from 0.001 to 0.070)
Boost-float current trigger 0.020C
10
(selectable from 0.001 to 0.025)
8 hr safety time timeout (selectable from 8 hr to 30 hr)
Boost mode inhibit also selectable
EOD voltage V/cell (VRLA) 1.67 (selectable from 1.60 to 1.90)
* For 250 kVA, load deration is applicable when 28 of batteries are configured.
Table 12.5 B attery
1. Nominal input voltage and input frequency.
12 Specifications
174
Vertiv™ Liebert® APM Plus User Manual
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