Kikusui PAT160-25T, Руководство по эксплуатации

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3-2
PAT-T 4kW
3.1 Load Considerations
Note that the output will become unstable if the following types of loads are
connected.
Load with peaks and pulse-shaped current
The PAT indicates only mean values. Even when the indicated value is less than the
preset current value, the peak values may actually exceed the preset current value. If
this happens, the PAT is instantaneously put into constant-current operation mode,
and the output voltage drops accordingly.
For these types of loads, you must increase the preset current value or increase the
current capacity.
Load that generates reverse current to the power supply
The PAT cannot absorb reverse current from the load. Therefore, if a regenerative
load (such as an inverter, converter, or transformer) is connected, the output voltage
increases and becomes unstable.
For these types of loads, connect a resistor R
D
as shown in Fig.3-3 to bypass the
reverse current. However, the amount of current to the load decreases by max.
reverse current I
rp
.
Fig.3-3 Remedy for regenerative load
• Use a resistor w ith s u fficient rated po w er for resistor R
D
.
• If a resistor w ith ins u fficient rated po w er for the circ u it is u sed, resistor R
D
may b u rn o u t.
Fig.3-1 Load c u rrent w ith peaks Fig.3-2 P u lse-shaped load c u rrent
Preset constant c u rrent val u e
Ammeter reading
(average val
u e)
Preset constant c u rrent val u e
Ammeter reading
(average val
u e)
I
O
R
D
E
O
Equivalent circuit of the PAT Regenerative load
− +
0
Reverse current
-I
O
+I
O
I
rp
R
D
[ Ω ] ≤
E
O
[V]
I
rp
[A]
R
D
: Reverse current bypass dummy load
E
O
: Output voltage
I
rp
: Max. reverse current
Output current waveform
Load
CAUTION