Figure 18 Breaking Characteristics Of Distribution Board Circuit Protectors - Fujitsu ETERNUS AX Series Manual

1. ETERNUS AX/HX Installation
Outlet/Socket Specifications
■
Breaking Characteristics
The breaking characteristics (*1) of the distribution board circuit protectors must be the long-time delay type
and must be equivalent to or slower than the D (IEC/EN60898-1) shown in
If the distribution board's circuit protectors have a breaking characteristic that is faster than D, the breaker may
trip when a power supply unit in the storage system fails. When the breaker trips, a shutoff occurs on multiple
power supply units connected to the same connection line as the failed power supply unit.
*1: Relationship between the size of excess current and operation time
Figure 18 Breaking Characteristics of Distribution Board Circuit Protectors
180
120
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
0.6
0.4
0.2
0.1
0.06
0.04
0.02
0.01
1 1.5 2
Current (ratio for the current rating)
B C D
3 4 5 6 7 8 10 15 20 30 40 50
Figure
80 100
39
18.
Site Planning Guide