Chapter 2 ETERNUS DX Disk Storage System Installation

2.6 Circuit Protectors

ETERNUS DX60 S2 Disk storage system User’s Guide -Site Planning-
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Copyright 2012 FUJITSU LIMITED P3AM-5492-04ENZ0

Figure 2.5 Example of a power supply connection using a power distribution unit (2U)

For power distribution unit (1U) connection

The breaking characteristics of distribution board circuit protectors must be slower than the val-

ues shown in Figure 2.6 or equivalent to D (IEC898).

Figure 2.6 Power distribution unit (1U) breaking characteristics (graph)

CP
Distribution
board
CE
Line 0
ETERNUS DX Disk storage system
To power supply facility
CP
Distribution
board
To power supply facility
DE #01
Power distribution unit
Line 1
CP: Circuit Protector
PSU
PSU
PSU
PSU
CPCP
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