Toshiba V Series Manual page 55

If the current consumption of a section exceeds the maximum current in a configuration
of single power unit central connection, take steps as shown in the table below. Figure 3-
14 shows an example of overloaded single power unit central connection.
Section exceeding the maximum current to
Only one of the two section
Both sections
Node 3
1.1A
Figure 3-13 Example of Overloaded Single Power Unit Central Connection
(a) Total current consumption of section 1
(a') Total current consumption of section 2
(b) Overall power cable length of section 1 = Overall power cable length of section 2
= 120 m
(c) Maximum current that can be supplied to the cables based on Figure 3-10 =
About 2.56 A (Obtained by linear approximation of 100 to 150 m)
(d) Since the total current consumption of section 1 is greater than the maximum
current, the power line is overloaded.
Solution: Move the power tap to the overloaded section. See Figure 3-14.
6F8C0903
cables
Section 1
セクション 1
120 m
Node 2 Node 1
1.25A 0.5A
3.5 Network Power/Grounding
Step
Move a node from the overloaded section to the
other section.
Move the power tap closer to the section
overloaded.
Use two power taps.
Section 2
セクション 2
120 m
V +−
電源
Power
Node 4
タップ
tap
V −
0.25A
ネットワーク
Network power
unit
電源供給装置
Node 5 Node 6
0.25A 0.85A
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