Chapter 2 ETERNUS DX Disk Storage System Installation
2.7 Circuit Protectors
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Breaking characteristics
The breaking characteristics (*1) of distribution board circuit protectors must be equivalent to or slower than
D (IEC898), which is shown in
*1:
Relationship between the size of excess current and operation time
Figure 2.8 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
ETERNUS DX80 S2/DX90 S2 Disk storage system User's Guide -Site Planning-
Figure
2.8.
B
C
D
~
~
~
1.5 2
3 4
5 6 7 8 10 15 20
Current (ratio for the current rating)
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30 40 50
80 100
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