¡
Even a slight difference in output voltage can affect the balance
between the values of I
1
and I
2
.
Please make sure that the value of I
3
does not exceed the rated
current of a power supply.
I
3
[
the rated current value
3 Temperature
Measurement Point
¡
Environment to use it and Installation environment
When using it,it is necessary to radiate heat by the heat of the pow-
er supply.
Table 3.1 - 3.4 shows the relation between the upper limit tempera-
ture (Point A and Point B) and load factors.
Please consider the ventilation so that the convection which is
enough for the whole power supply is provided.
And temperature of Point A and Point B please become lower than
upper limit temperature.
The life expectancy in the upper bound temperature (Point A and
Point B) is three years or more.
Please refer to External View for the position of Point A and Point B.
In case of with Chassis and Cover, please contact our sales office
for getting more information.
Remarks:
*
Please be careful of electric shock or earth leakage in case of
temperature measurement, because Point A and Point B is live
potential.
*
Please refer to 4 if you want to extend the longevity of the life
expectancy.
Table 3.1 Temperatures of Point A, Point B LFP100F-
O
-Y
Mounting
Method
Cooling
Method
Load factor
Max temperature
Point A[
C
] Point B[
C
]
A
Convection
75%
<
Io
[
100%
88
86
50%
<
Io
[
75%
89
89
0%<Io
[
50%
89
89
B
Convection
75%
<
Io
[
100%
82
81
50%
<
Io
[
75%
89
89
0%<Io
[
50%
89
89
C
Convection
75%
<
Io
[
100%
85
86
50%
<
Io
[
75%
89
89
0%<Io
[
50%
89
89
D
Convection
75%
<
Io
[
100%
84
76
50%
<
Io
[
75%
89
86
0%<Io
[
50%
89
89
E
Convection
75%
<
Io
[
100%
81
89
50%
<
Io
[
75%
86
89
0%<Io
[
50%
87
89
F
Convection
75%
<
Io
[
100%
80
77
50%
<
Io
[
75%
85
86
0%<Io
[
50%
88
89
A,B,C,D,E,F Forced air 70%
<
Io
[
100%
75
75
0%<Io
[
70%
75
75
Bad example
Good example
Fig.1.2. Example of measuring output ripple and ripple noise
1.8 Isolation
¡
For a receiving inspection, such as Hi-Pot test, gradually increase
(decrease) the voltage for the start (shut down). Avoid using Hi-
Pot tester with the timer because it may generate voltage a few
times higher than the applied voltage, at ON/OFF of a timer.
1.9 Reducing standby power
¡
As for option -R2, reducing standby power is possible by OFF sig-
nal of the remote control.
Please refer to instruction manual 7.1.
2 Series Operation and
Parallel Operation
2.1 Series Operation
¡
You can use a power supply in series operation. The output cur-
rent in series operation should be lower than the rated current of a
power supply with the lowest rated surrent among power supplies
that are serially connected. Please make sure that no surrent ex-
ceeding the rated current flows into a power supply.
Load
Power
Supply
+
-
+
-
Power
Supply
Load
Load
Power
Supply
+
-
+
-
Power
Supply
Fig.2.1 Examples of connecting in series operation
2.2 Parallel Operation
¡
Parallel operation is not possible.
¡
Redundancy operation is available by wiring as shown below.
I
2
I
1
I
3
-
+
+
-
Load
Power
Supply
Power
Supply
Fig.2.2 Example of redundancy operation
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFP-15
June 26, 2020
