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S8VS
Engineering Data
(60-W, 90-W, 120-W, 180-W, 240-W, and 480-W Models)
■
Derating Curve
Note: 1.
Using side mounting bracket for right-side mounting
(excluding 240-W models).
2.
Internal parts may occasionally deteriorate or be damaged.
Do not use the Power Supply in areas outside the derating
curve (i.e., the area shown by shading
A
in the above
graph).
3.
If there is a derating problem, use forced air-cooling.
4.
When using a 480-W model at an input voltage of 95 VAC
or less, derate the load by at least 80%.
■
Mounting
Note:
Improper mounting will interfere with heat dissipation and may
occasionally result in deterioration or damage of internal parts.
It may also result in failure of the maintenance forecast monitor
function. Use the standard mounting method only.
■
Overload Protection
The Power Supply is provided with an overload protection function
that protects the power supply from possible damage by overcurrent.
When the output current rises above 105% min. of the rated current,
the protection function is triggered, decreasing the output voltage.
When the output current falls within the rated range, the overload
protection function is automatically cleared.
Note: 1.
Internal parts may occasionally deteriorate or be damaged
if a short-circuited or overcurrent state continues during
operation.
2.
Internal parts may possibly deteriorate or be damaged if the
Power Supply is used for applications with frequent inrush
current or overloading at the load end. Do not use the Power
Supply for such applications.
■
Peak Output Current
(S8VS-48024
@
only)
The peak current must satisfy the following conditions.
Input voltage range: 200 to 240 VAC
Peak current value: 30 A max.
Peak current pulse width: 2 s max.
Cycle: 60 s min.
Note: 1.
Two seconds after the peak current is reached, the peak
current limiting function operates to stop the peak current
flow.
2.
It takes 60 seconds for the peak current to be able to flow
again.
3.
The peak current limiting function prevents the peak current
from flowing at 100 to 120 VAC.
■
Overvoltage Protection
Consider the possibility of an overvoltage and design the system so
that the load will not be subjected to an excessive voltage even if the
feedback circuit in the Power Supply fails. When an excessive
voltage that is approximately 130% of the rated voltage or more is
output, the output voltage is shut OFF. Reset the input power by
turning it OFF for at least three minutes and then turning it back ON
again.
Note:
Do not turn ON the power again until the cause of the
overvoltage has been removed.
−
20
−
10 0 10 20 30 40 50 60 70 80
120
100
80
60
40
20
0
Load (%)
Ambient temperature (°C)
See note 1.
1
Upper
Upper
Standard mounting
Face-up mounting
Correct
Incorrect
0
50
100
0
50
100
Output current (%)
Output
v
oltage (V)
Output current (%)
Output
v
oltage (V)
Intermittent operation
60-W/90-W Models
120-W/180-W/240-W/480-W Models
The values shown in the above diagrams are for reference only.
Peak current limit
Output current
0 A
Overcurrent
protectionpoint
60 s min.
2 s
Peak current
condition
+15%
−
10%
0V
+30%
(approx.)
Overvoltage protection
operating
Variable range
Rated output
voltage
Output
v
oltage (V)
The values shown in the above diagram is for reference only.
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21
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