(a)
(b)
Fixed screw (6 pcs.)
Fixed screw (6 pcs.)
-V
+V
Input
Fixed screw
(6 pcs.)
Fixed screw
(6 pcs.)
-V
+V
Input
Fig.4.4 Installation method
4.2 Derating
¡
Input Voltage Derating Curve
Input voltage derating curve is shown in Fig.4.5.
[AC V]
300
320
85
100
Loa
d [%]
Fig.4.5 Input voltage derating curve
¡
Ambient Temperature Derating Curve
Derating curve depending on an ambient temperature is shown in
Fig.4.6.
*
Specifications for ripple and ripple noise changes in the shaded
area.
80
70
40
60
- 10
2
10
30
50
0
0
100
0
20
40
60
80
Loa
d f
ac
to
r [%
]
Ambient temperature [
C
]
Fig.4.6 Ambient temperature derating curve
4.3 Conditions of the safety approval
¡
To apply for safety standard using this power supply, the following
conditions must be met.
1
This unit must be used as a component of the end-use equip-
ment.
2
This unit must be provided with overall enclosure.
3
The FG terminal must be connected to safety ground of the end-
use equipment, as required for class I equipment.
4
50A circuit breaker must be externally installed on the input side.
5
Altitude of operation is up to 3,000 m.
4.4 Expected Life and Warranty
¡
Expected life
Please see the following tables for expected life.
Table.4.2 Expected lifetime
Mounting
Cooling
method
Average ambient
temperature
Expected lifetime
[years]
Io = 50% Io = 100%
All
direction
Forced air cooling
(internal fan)
Ta = 40
C
7
5
Ta = 60
C
4
-
*
This lifetime includes a built-in fan lifetime.
¡
Life expectancy (R(t)=90%) of fan depends on use conditions as
shown in Fig 4.7.
Life expectancy of fan [H
]
Ambient temperature[
C
]
30
20
40
50
60
70
500,000
100,000
10,000
Io=50%
Io=100%
Fig.4.7 Life expectancy of fan
¡
Warranty
Warranty is 3 years.
AC-DC Power Supplies Enclosed Type
Instruction Manual
FETA-14
