Installation manual

Electrical characteristics >
34020846EN/AE - Page 62
2. Appendices
2.3 Electrical characteristics
Selection of protection devices
UPS short-circuit current with inverter coupled and bypass AC source out of tolerances:
Line-current values:
When sizing the upstream circuit breakers, the parameters below must be taken into account:
Time/current curves for UPS input and output fuses:
Sn 160 kVA 200 kVA 250 kVA 300 kVA 400 kVA 500 kVA
In (at 400 V) 231 A 289 A 361 A 433 A 577 A 721 A
Icc max 725 A 725 A 1030 A 1030 A 1374 A 1975 A
Icc min 570 A 570 A 793 A 793 A 1140 A 1470 A
Rated
power of
each UPS
unit
Continuous input
current at U=400V
Input current for load PF =
0.9, U = 400V at 1.25 In
overload limited to 10 min.
Input current for load PF =
0.9, U = 400V at 1.5 In
overload limited to 30 sec.
Input/output fuse
ratings
160 236 A 282 A 340 A 400 A
200 295 A 353 A 424 A 400 A
250 kVA 368 A 441 A 530 A 630 A
300 kVA 442 A 530 A 636 A 630 A
400 kVA 587 A 706 A 848 A 800 A
500 kVA 735 A 881 A 1058 A 1000 A
Q1
Q4S
Q5N
NORMAL AC
BYPASS AC
Circuit breaker
upstream *
Circuit breaker
upstream *
*not supplie
d
fuses
input
fuses
output
Downstream CB*
Load
I (A)
t (s)
400 kVA : 800A
500 kVA : 1000A
250-300 kVA : 630A
160-200 kVA : 400A
10
-4
10
3
10
2
10
1
10
-1
10
-2
10
-3
10
2
10
3
10
4
10
5