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
UDE #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