96 Chapter 11 Specifications
NX UPS Single Module And Parallel System 250kVA ~ 800kVA User Manual
Rated power (kVA)
Item
Unit
250
300 E
300
400
500
600 E
600
800
Steady state voltage
stability
% ±
1
Transient voltage
response
4
% ±
5
Total harmonic voltage
%
< 2 (linear load), < 5 (non-linear load
3
)
Synchronisation window
Hz
Rated frequency ±5
Slew rate (max. change
rate of synchronisation
frequency)
Hz/s
1; setting range: 0.1 ~ 3 (single unit), 0.6 (parallel system)
Note:
1. Factory set to 380V. 400V or 415V selectable by commissioning engineer.
2. Factory set to 50Hz. 60Hz selectable by commissioning engineer.
3. EN 50091-3 (1.4.58) crest factor 3:1, non-linear load 100kVA plus remaining resistive compound load.
4. IEC 62040-3/EN 50091-3 also for 0% ~ 100% ~ 0% load transient. Transient recovery time: return to within 5% of steady state
output voltage within half a cycle
11.7 Electrical Characteristics (Bypass Input)
Table 11-7 Bypass input
Rated power (kVA)
Item
Unit
250
300 E
300
400
500
600 E
600
800
Rated AC voltage
1
Vac
380/400/415, 3-phase 4-wire, sharing neutral with the rectifier input and
providing neutral reference to the output
A
379 455 455 606 758 910 910 1212
A
363 435 435 580 725 870 870 1160
Rated
current
380V
400V
415V
A
348 417 417 556 694 834 834 1112
Overload
%
1000%, 100ms
Frequency
2
Hz
50/60
Bypass voltage tolerance
%Vac
Upper limit: + 10, + 15 or + 20, default: + 15
Lower limit: - 10, - 20, - 30 or - 40, default: - 20
(delay time to accept steady bypass voltage: 10s)
Bypass frequency
tolerance
%
± 10 or ± 20, default: ± 10
Synchronisation window
Hz
Rated frequency: ± 5
Note:
1. Factory set to 380V. 400V or 415V selectable by commissioning engineer.
2. Factory set to 50Hz. 60Hz selectable by commissioning engineer
11.8 Loss
Table 11-8 Loss
Rated power (kVA)
Item
Unit
250
300 E
300
400
500
600 E
600
800
Rated normal mode
kW
12.4
13.2
15
18
22.5
24
27
36
