119
・All specifications are subject to change without notice.
Instruction Manual
HWS
HWS HD
HWS ME
HWS-P
Withstand Voltage
This series is designed to withstand 3.0kVAC between input and out-
put, 2.0kVAC between input and FG (chassis), 500VAC (60V model:
651VAC) between output and FG (chassis), and 100VAC between
output and CNT･PF terminal each for 1 minute. When testing with-
stand voltage, set current limit of withstand voltage test equipment at
20mA.
(Output-FG (chassis): 300mA (60V model: 390mA), Output- CNT･PF
: 100mA).
The applied voltage must be gradually increased from zero to testing
value and then gradually decreased for shut down. When timer is used,
the power supply may be damaged by high impulse voltage at timer
switch on and off . Connect input and output as follows. If output is left
open during test, output voltage might appear momentarily.
This product have monolithic ceramic capacitor in secondary circuit
to frame ground.
Some of the withstand voltage tester may generate high voltage at the
matching with monolithic ceramic capacitor and may cause the unit
damage.
So, please check the waveform of test voltage.
Input−FG
（chassis）
（solid line）
2kVAC 1min.
（20mA）
Input−Output
（dotted line）
3kVAC 1min.
（20mA）
Output−FG
（chassis）
500VAC 1min.
（300mA）
（60V model: 651VAC 1min.
（390mA）
）
Withstand
Voltage Tester
Withstand
Voltage Tester
Withstand
Voltage Tester
〜
〜
〜
〜
Output−CNT・PF
100VAC 1min.
（100mA）
CNT TOG PF
PC
L1
FG
L2
L3
＋S
＋
ー
ーS
CNT TOG PF
PC
L1
FG
L2
L3
＋S
＋
ー
ーS
CNT TOG PF
PC
L1
FG
L2
L3
＋S
＋
ー
ーS
Output Voltage External Control (PV)
(A) Control by External Voltage
Output voltage external control function is provided. Output voltage
can be varied by applying an external voltage (1−6V) to PV terminal
and COM terminal. Note if an external voltage is not applied, there
will be no output. Please consider the following characteristics below
when operating the unit.
1ー6V
Connection Method
Power
Supply
Load
＋S
ーS
PV
＋
ー
COM
6V
5.5V
5V
1V
0
1.5V
Output Voltage Linearity
120%
110%
30%
20%
Nominal
Output
Voltage
PV Voltage
（Nominal Input Voltage）
Output
︵
V
︶
Note: Only as for the model of 3V output, the output voltage is used from 30%
to 120% at the PV voltage is from 1.5V to 6V
Note: Only as for the model of 5-36V output, the output voltage is used from
20% to 120% at the PV voltage is from 1V to 6V
Note: Only as for the model of 48V, 60V output, the output voltage is used
from 20% to 110% at the PV voltage is from 1V to 5.5V
0
Output Voltage Derating
120%
110%
30%
20%
83% 90%
100%
Nominal
Output
Voltage
Operating
Area
Load Current
Output
︵
V
︶
Note: Only as for the model of 48V, 60V output, the maximum output voltage
is used up to 110% at 90% load current.
(B) Control by External Variable Resistor
PV terminal and COM terminal usage is the same as explained
in section ｢control by external voltage｣ . But in this method voltage for
control is supplied through REF terminal. Variable resistor is con-
nected between REF terminal and COM terminal and the middle point
of variable resistor is connected to PV terminal. Please use the output
voltage within 20% - 120% of rated output voltage value (48V, 60V
model: 20% - 110% ). Wires for control lines must be twisted wire or
shield wire. In addition, maximum variable voltage when control by
external variable resistor is rated output voltage (100% ). When output
voltage must be externally control to 120% of rated output voltage (110%
for 48V, 60V model), please follow the following procedure.
（1）PV terminal and REF terminal is short by using standard connec-
tor supplied.
（2）Set the power supply output voltage to maximum value of the out-
put voltage variable range mentioned in specifi cation standard by
adjusting V.ADJ volume at the front panel.
（3）Remove standard connector after input is cut off .
（4）Connect external variable resistor (50kΩ) between REF terminal
and COM terminal. Then connect middle point of external variable
resistor to PV terminal.(sensing current is 1.4mA)
VR1
COM
PV
＋S
ーS
＋
ー
REF
Sensing current : 1.4mA
Variable resistor 50kΩ
Connection method
Power
supply
Load
When output voltage is over rated value, please make sure that
maximum output power is below rated value. Moreover, when output
voltage is below rated value, please make sure that maximum output
current is below rated value.
Please consider the following characteristic during usage.
HWS
1800T
P79-132.indd 119
09.10.26 10:29:41 AM
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