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1.
ETERNUS AF 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 8 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
B
C
D
~
~
~
1.5 2
3 4
5 6 7 8 10 15 20 30 40 50
Current (ratio for the current rating)
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Site Planning Guide
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Figure
8.
P3AG-1812-06ENZ0