Kikusui PWX1500H, Руководство пользователя

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64
PWX
Output Terminal Insulation
The cable and load that are connected to the output terminal (including the sensing terminal)
must have an insulation capacity that is greater than or equal to the isolation voltage of the
PWX series with respect to the chassis. Isolation voltage indicates the maximum allowed volt-
age that appears across the output terminal of the power supply unit and the protective con-
ductor terminal (chassis terminal).
When the output terminal is not grounded (floating)
The output terminal of the PWX series is isolated from the protective conductor terminal. If
you connect the GND wire of the power cord to the ground terminal of the switchboard, the
chassis of the PWX series is set to ground potential.
Pins 5 to 13 (for external control and parallel operation) and 18 to 25 (for external control and
output monitoring) of the rear panel J1 connector are at approximately the same electric
potential as the PWX series negative output terminal. Cables and devices that are connected
to these pins must have an insulation capacity greater than or equal to the isolation voltage of
the PWX series.
WARNING
Risk of electric shock. For safety reasons, even if the output terminal is grounded,
make sure that the insulation capacity of the output terminal (including the sensing
terminal) is greater than or equal to the isolation voltage of the PWX series.
For the isolation voltage of each model, ”Specifications” on page 93.
If you cannot obtain a cable with sufficient rated voltage, secure adequate withstand
voltage by passing the cable through an insulation tube with a withstand voltage
greater than the isolation voltage of the PWX series.
CAUTION
The signal cable may burn out. If the PWX series is to be controlled through an external volt-
age (Vext), do not ground the external voltage (leave it floating).
+
–
+
+S
–S
–
+
–
16
18
19
14
21
22
20
3
5
6
13
12
11
10
9
8
7
1
23
24
25
AC
INPUT
DC
OUTPUT
J1
SENS
L
N
Approximately the same
potential as the negative
output terminal
Approximately the same
potential as the negative
output terminal
Isolated
Isolated
Load
Rext
PWX
Vext
Because the output
terminal is floating, the
section shown on a gray
background must have an
insulation capacity greater
than or equal to the
PWX750ML isolation
voltage.