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Fujitsu DX60S2 User Manual

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Chapter 2  ETERNUS DX Disk Storage System Installation
  2.6  Circuit Protectors
ETERNUS DX60 S2 Disk storage system User’s Guide -Site Planning-
40
Copyright 2012 FUJITSU LIMITED
P3AM-5492-04ENZ0
■
For direct (no power distribution unit) connection
The breaking characteristics of distribution board circuit protectors must be slower than the val-
ues shown in 
 or equivalent to D (IEC898).
Figure 2.8
ETERNUS DX Disk storage system (PSU) breaking characteristics (graph)
Table 2.12 ETERNUS DX Disk storage system (PSU) breaking characteristics (Trip time (sec.))
Figure 2.9
Example of a power supply connection without power distribution units
Delay
100%
125%
150%
200%
400%
600%
800%
1000%
200E
No Trip
45 to 
500
15 to 
250
6 to
 90
0.7 to
 15
0.008 to
 5
0.006 to
 0.4
0.004 to
 0.08
CAUTION
Do
•
Only connect the ETERNUS DX Disk storage system to circuit 
protectors.
CURVE 200E
100
125
150
200
300
400
500
600
700
800
900
1000
1000
100
10
1
0.1
0.01
0.001
PERCENT LOAD (%)
TIME IN SECONDS
CE
P
S
U
P
S
U
DE #01
Line 0
Line 1
CP
CP
ETERNUS DX Disk storage system
T
o
 po
w
er supply f
acility
T
o
 po
w
er supply f
acility
Distr
ib
ution board
Distr
ib
ution board
CP: Circuit Protector
PSU
PSU
PSU
PSU