Kikusui PAT160-25T, Operation Manual

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4-2 8
PAT-T 4kW
Fig.4-26 Remote sensing connection
1
T u rn the POWER s w itch off.
2
T u rn on the sensing s w itch on the rear panel.
3
As sho w n in Fig.4-26, connect the sensing cable bet w een the sensing
terminal and the load terminal.
To decrease output ripple voltages resulting from inductive effects, use a two-core
shielded wire for the sensing wires. Connect the shield to the
− (neg.) terminal.
If you cannot use shielded wires, twist the ＋ (pos.) and − (neg.) wires thoroughly.
Fig.4-24
Remove the covering from the sensing wires appropriately before connecting them.
■
Electrolytic capacitor connected at the load end
If the inductance in the wire is large, the following symptoms may appear. Twisting
the load wires reduces the inductance, thereby stabilizing the output. However, if
this does not solve the problem, connect an electrolytic capacitor at the load end.
• Oscillation
If the wiring to a load is long, the phase shift caused by the inductance and
capacitance of the wiring becomes non-negligible, thereby causing oscillation.
• Fluctuating output
If the load current changes suddenly to pulse form, the output voltage may
increase due to the effects from the inductance component of the wiring.
Electrolytic capacitor required
Capacitance: 0.1
μ
F to several-hundred
μ
F
Withstand voltage: Greater than or equal to 120 % of the rated output voltage of
the PAT
■
When inserting a mechanical switch between the PAT and the load
If you are using a mechanical switch that is inserted between the PAT and the load
to turn on/off the connection between them, insert a switch also in the sensing wire
as shown in Fig.4-27 and turn on/off the load wire and the sensing wire
simultaneously. Be sure to turn off the OUTPUT switch or POWER switch before
turning on/off the mechanical switch.
2-core shielded wire
+
+
–
–
C
Connect an
electrolytic
capacitor as
necessary.
Load
Output terminal
Chassis terminal
Sensing terminal
Sensing switch
+S
-S
PAT
OFF ON
See