2.1 Input Voltage Range
¡
Input voltage range of the power supplies is from AC85V to
AC264V.
¡
To comply with safety standards, input voltage range is AC100-
AC240V (50/60Hz).
¡
If input value doesn’t fall within above range, a unit may not oper-
ate in accordance with specifications and/or start hunting or oper-
ate protection circuit or fail.
If you need to apply a square waveform input voltage, which is
commonly used in UPS and inverters, please contact us.
¡
When the input voltage changes suddenly, the output voltage
accuracy might exceed the specification. Please contact us.
¡
When the power supply is used with DC voltage input, an external
DC fuse is required for protection. Consult us for more details.
¡
If the input voltage is more than AC250V, power factor correction
does not work and the power factor deteriorates. Consult us for
more details. (except KLEA240F, KLNA240F)
¡
Operation stop voltage is set at a lower value than of a standard
version (derating is needed).
-
Use Conditions
Output
KLEA120F,KLNA120F
70W
KLEA240F,KLNA240F
100W
Input AC50V or DC70V
Duty 1s/30s
*
Please avoid using continuously for more than 1 second under
above conditions. Doing so may cause a failure.
2.2 Inrush Current Limiting
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An inrush current limiting circuit is built-in.
¡
If you need to use a switch on the input side, please select one
that can withstand an input inrush current.
¡
Thermistor is used in the inrush current limiting circuit. When you
turn the power ON/OFF repeatedly within a short period of time,
please have enough intervals so that a power supply cools down
before being turned on.
2.3 Overcurrent Protection
¡
A overcurrent protection circuit is built-in and activated over 105%
of the rated current. A unit automatically recovers when a fault
condition is removed. Please do not use a unit in short circuit and/
or under an overcurrent condition.
¡
Hiccup Operation Mode (except KLEA240F, KLNA240F)
When the overcurrent protection circuit is activated and the output
voltage drops to a certain extent, the output becomes hiccup so
that the average current will also decrease.
2 Functions
2.4 Overvoltage Protection
¡
An overvoltage protection circuit is built-in. If the overvoltage pro-
tection circuit is activated, shut down the input voltage, wait more
than 3 minutes and turn on the AC input again to recover the out-
put voltage. Recovery time varies depending on such factors as
input voltage value at the time of the operation.
Note :
Please avoid applying a voltage exceeding the rated voltage to an
output terminal. Doing so may cause a power supply to malfunc-
tion or fail. If you cannot avoid doing so, for example, if you need
to operate a motor, etc., please install an external diode on the
output terminal to protect the unit.
2.5 Output ripple and ripple noise
¡
Output ripple noise may be influenced by measurement environ-
ment, measuring method fig 2.1 is recommended.
+Vout
-Vout
150mm
C
2
C
1
+
Load
Osiloscope/
Ripple noise meter
Bw:20MHz
Differential probe
C
1
:Film capacitor 0.1
m
F
C
2
:Aluminum electrolytic capacitor 22
m
F
Fig.2.1 Measuring method of Ripple and Ripple Noise
2.6 Output Voltage Adjustment Range
¡
To increase an output voltage, turn a built-in potentiometer clock-
wise. To decrease the output voltage, turn it counterclockwise.
2.7 Isolation
¡
When you run a Hi-Pot test as receiving inspection, gradually
increase the voltage to start. When you shut down, decrease the
voltage gradually by using a dial. Please avoid a Hi-Pot tester with
a timer because, when the timer is turned ON or OFF, it may gen-
erate a voltage a few times higher than the applied voltage.
2.8 Signal Output
Functions of LED indicators.
¡
Functions of LED indicators and signal output in the form of are
shown below. Checking the presence/absence of voltage at the
output terminal of a power supply is possible.
Table 2.1 Description of the signal output
Signal Output
Normal
Output is decreasing
DC_OK (LED: Green)
ON
OFF
AC-DC Power Supplies DIN Rail Type
Instruction Manual
KL-9
KL-9
