Chapter 11 Specifications 95
NX UPS Single Module And Parallel System 250kVA ~ 800kVA User Manual
11.4 Electrical Characteristics (Input Rectifier)
Table 11-4 Rectifier AC input (mains)
Rated power (kVA)
Item
Unit
250
300 E
300
400
500
600 E
600
800
Rated AC input voltage
1
Vac
380/400/415, 3-phase 4-wire (+
PE
) TN power distribution system
Input voltage range
2
Vac
228 ~ 478
Frequency
2
Hz
50/60 (tolerance: 40 ~ 70)
Power factor
kW/kVA, full load
(half load)
0.99 (0.98)
Input current
A, rated
3
345 368 458 549 686 732 916 1220
Harmonic current
distortion
THDI% FL
3
Duration of progressive
power walk-in
s
10s to reach full rated current (selectable 5s through 30s in 5-second intervals)
Note:
1. Rectifiers operate at any of the rated supply voltages and frequencies without further adjustment.
2. At 324V input mains the UPS maintains the specified output voltage at rated load without discharging a previously charged
battery.
3. IEC62040-3/EN50091-3: at rated load and input voltage 400V, battery fully charged
11.5 Electrical Characteristics (Intermediate DC Circuit)
Table 11-5 Battery
Rated power (kVA)
Item
Unit
250
300 E
300
400
500
600 E
600
800
Rated battery bus voltage Vdc
480
Quantity of lead-acid
cells (nominal)
pcs 40
(12Vdc)
Float voltage
V/cell (VRLA)
2.25 (selectable from 2.2V/cell to 2.3V/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 2.3 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 0.010C
10
(selectable from 0.001 to 0.025)
24hr safety time timeout (selectable from 8hr to 30hr)
Boost mode inhibit also selectable
EOD voltage
V/cell (VRLA)
1.67
Battery charge
V/cell
2.35 (selectable from 2.3 to 2.35)
Constant current and constant voltage charge mode
Programmable automatic trigger or inhibit of boost mode
11.6 Electrical Characteristics (Inverter Output)
Table 11-6 Inverter output (to critical load)
Rated power (kVA)
Item
Unit
250
300 E
300
400
500
600 E
600
800
PF
value
0.9 0.8 1 0.9 0.9 0.8 1 0.9
Rated AC voltage
1
Vac
380/400/415 (3-phase 4-wire, with neutral reference to the bypass neutral)
Frequency
2
Hz
50/60
Overload
%
105, long time; 125, 10min; 150, 30ms
Non-linear load
capability
3
% 100
