Kikusui PAT160-25T, Руководство по эксплуатации

Страница: 85 / 218

PAT-T 4kW
5-13
5
Ext
e
rnal C
ontr
o
l
5.5 Controlling the Output Current
This section explains the method used to control the output current using an external
voltage (Vext) in the range 0 V to approx. 10 V or an external resistor (Rext) in the
range 0 k
Ω
to approx. 10 k
Ω
..
It is about 5 ms to change the output current from the time when the input value of
the external voltage or external resistance were changed.
When controlling the output current in the single-phase input mode, the setting value
of the output current is limited to 75 % of the rating in the three-phase input mode.
Possible electric shock.
•
The insulation of the Vext or Rext and the connected cable should be
greater than the isolation voltage of the PAT. For the isolation voltage of
each model, see Chapter 9, “Specifications.”
• When using shielded wires for the connection, protect the uncovered
section of the shielded wire by using insulation tubes with a withstand
voltage greater than the isolation voltage of the PAT.
5.5.1 External Voltage (Vext) Control
p. 4-1 8
To control the output current using Vext, set the CC control source in the CONFIG
settings to external voltage control (CF21: 1).
The output current (Io) varies in the range of 0 to the rated output current (Irtg) by
setting the external voltage (Vext) in the range of 0 V to 10 V.
Io = Irtg
×
Vext /10 [A] Vext = 10
×
Io /Irtg [A]
• The signal w ire may b u rn o u t. Leave the Vext o u tp u t floating.
• Make s u re the polarity of Vext is correct. If the polarity is reversed, the
PAT may break.
• Do not apply voltage or reverse voltage exceeding 10.5 V across the
external voltage control pins. Doing so may break the PAT.
0 10
67.0
7.5
50.25
(A)
(V)
Upper limit of
setting range
Output Current
External Input V oltage
Three-phase mode
Single-phase mode
(MAX OUT)
0
10 7.5
(A)
(kΩ)
(0 OUT)
2.5
Three-phase mode
Single-phase mode
67.0
50.25
Upper limit of
setting range
Output Current
External Input Resistance
Example of PAT60-67T
WARNING
See
CAUTION