User Manual 10H52188UM60 - Rev. 2 - 09/2012
61
Liebert NXC
Product Specifications
9.4
Electrical Characteristics (Input Rectifier)
Table 9-4 Rectifier AC Input (Mains)
Item Unit
Rated power (kVA)
10 15
20
Rated AC input voltage
1
Vac
380/400/415; default 400
Frequency
2
Hz
40...70
Power factor
kW/kVA,
full load;
half load
>0.99 @ full load; > 0.98 @ half load
Input power
kVA rated
3
10
15
20
kVA rated
3
(max.
4
)
15 20
25
Input current
A rated
3
14
21
28
A rated
3
(max.
4
)
21 28
35
Harmonic current distortion
THDI% FL
<5 (3/3); <15 (3/1)
Duration of progressive power walk-in
s
5
Note:
1
Rectifier operates at any of the rated supply voltages and frequencies without further adjustment.
2
At 305 V mains input, the UPS maintains the specified output voltage at rated load without discharging a previously charged battery.
3
EN/IEC 62040-3/EN50091-3: at rated load and input voltage 400V, battery charged.
4
EN/IEC 62040-3/EN50091-3: at rated load and input voltage 400V, battery charging at maximum rated power
9.5
Electrical Characteristics (Intermediate DC Circuit)
Table 9-5 Battery
Item Unit
Rated power (kVA)
10 15 20
Battery bus voltage
Vdc
Nominal: 384 (VRLA float charge is 436 V); range: 300 to 576
Quantity of lead-acid blocks
Nominal 32
Other
possible
values
30-34-36-38-40
Float voltage
V/cell
(VRLA)
2.27 (selectable between 2.2 V/cell and 2.3 V/cell)
Constant current and constant voltage charge mode
Ripple voltage
% V float
1.41
Ripple current
% C10
5
Boost voltage
V/cell
(VRLA)
2.35 (selectable between 2.3 V/cell and 2.4 V/cell)
Constant current and constant voltage charge mode
Programmable automatic trigger or inhibit of boost mode
Boost control
-
Float-boost current trigger 0.050 C10 (selectable between 0.001 and 0.070)
Boost-float current trigger 0.010 C10 (selectable between 0.001 and 0.025)
24h safety time timeout (selectable between 8h and 30h)
Boost mode inhibit also selectable
EOD voltage
V/cell
(VRLA)
Lower limit: 1.63 (selectable between 1.60 V/cell and 1.67 V/cell)
Upper limit: 1.75 (selectable between 1.67 V/cell and 1.85 V/cell)
Automatic inverse, EOD voltage x discharge current mode
(the EOD voltage increases at low discharge currents)
Max battery charging power
1
and max
charging current (adjustable)
2
kW 4.5
A 11
Note:
1
At low input voltage the UPS recharge capability increases as the load decreases (up to the maximum capacity indicated).
2
Max currents listed are for EOD voltage of 1.67 V/cell for 240 cells
