S8PS
S8PS
4
Overload Protection
50- to 300-W Models
The Power Supply is provided with an overload protection function
that protects the load and the power supply from possible damage
by overcurrent. The protection function operates when the load cur-
rent rises above an overcurrent set value (105% of the rated load
current). For a short-circuit or overcurrent lasting less than 20 se-
conds, output voltage is decreased to protect equipment. When the
output current falls within the rated range, the overload protection
function is automatically cleared.
Output voltage (V)
Output current (%)
Rating
Intermittent
operation
Note:
Do not continue using the S8PS under short-circuited or
overcurrent conditions for longer than 20 seconds, other-
wise the internal elements of the S8PS may be damaged or
broken.
600-W Models
If an excessive current flows for 5 s or more, the output will be turned
OFF and simultaneously protection-ON alarm indicator will be lit. To
reset the S8PS, turn OFF the input voltage, leave the S8PS for at
least three minutes, and then apply the input voltage again.
Note:
Do not continue using the S8PS with the output terminals
short-circuited or the overcurrent condition continued,
otherwise the internal elements of the S8PS may be dam-
aged or broken.
Overvoltage Protection
The Power Supply is provided with an overvoltage protection func-
tion that protects the load and the Power Supply from possible dam-
age by overvoltage. When the output voltage rises above a set val-
ue (115% of the rated output voltage), the protection function is trig-
gered, shutting OFF the output voltage. If this occurs, reset the Pow-
er Supply by turning it OFF for 1 minute min. and then turning it ON
again.
Rated output
voltage
Output voltage (V)
Overvoltage
protection
operating
Variable range
0 V
300- and 600-W Models Only
The overvoltage protection-ON alarm indicator lights when the
function is operating.
Overheat Protection Function
600-W Model Only
If the internal temperature of the S8PS rises excessively as a result
of fan failure or any other reason, the overheat protection circuit will
be triggered to protect the internal elements of the S8PS and simul-
taneously a protection-ON alarm indicator will be lit. To reset the
S8PS turn OFF the input voltage, leave the S8PS for at least one
minute and then apply the input voltage again.
Inrush Current, Rise Time, Hold Time
Input ON
Input OFF
AC input
voltage
AC input
current
Output
voltage
Rise time
(1,000 ms max.)
Hold time
(20 ms min.)
Inrush current on input application
90%
96.5%
