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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 Figure 2.8
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
To power supply facility
To power supply facility
Distribution board
Distribution board
CP: Circuit Protector
PSU
PSU
PSU
PSU