Kikusui PAN 110-1.5A, Руководство по эксплуатации

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2-6 PAN-A
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Connecting a 10
Ω
resistive load
A resistive load of 10 Ω is connected to the output terminals of the
power supply and the output current limit is set to 5 A. In this condi-
tion, output voltage is raised gradually from 0 V.
In this case, the power supply operates in the constant voltage (CV)
mode. The output current increases as the output voltage increases,
and when the output voltage reaches 50 V (that is, the output current
has reached 5 A), the output voltage no longer increases beyond 50 V
even if you attempt to raise it. This is because the output current is
limited to the 5 A set at the beginning of operations, causing the
power supply to switch to the constant current (CC) operation mode.
In this way, the power supply automatically moves from the constant-
voltage to constant current operation to prevent an overcurrent from
fl owing. (The point at which the operation modes switch is called the
"crossover point"). If the current limit is raised in this condition, the
power supply returns to the previous constant voltage operation,
allowing you to increase the output voltage further. If the current
limit is increased from 5A to 9A in Fig.2-7, a voltage of up to 90V
can be output.
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Connecting a 4
Ω
resistive load
Let's assume a case in which a load resistance of 4 Ω is used. The
output current limit is regarded as the rated maximum output current.
When you increase the output voltage from 0 V, the output current
reaches the power supply's maximum current rating when the output
voltage reaches 40 V; the power supply cannot output a voltage above
40V with the maximum current
fl owing. This is its limit, even though
the power supply is not yet generating half its output capacity in
terms of power.
If you wish to increase the output voltage further, another power sup-
ply needs to be connected in parallel to the relevant unit, or the initial
unit needs to be replaced by a model having larger current capacity.
Particularly for loads into which a transient peak current
fl ows, the
current must be set such that its peak does not reach (or exceed) the
current limit. If the unit enters constant current operation mode even
when the current is set within the rated output current, the current
capacity needs to be raised.