8
TDK-Lambda
HWS
30A-150A/ME
Series
INSTRUCTION MANUAL
4-11.Withstand Voltage
This series is designed to withstand 3.0kVAC between input and output, 2.0kVAC between input and FG and 500VAC
between output and FG each for 1 minute. When testing withstand voltage, set current limit of withstand voltage test
equipment at 20mA. 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.
■
Input ~ FG (solid line) : 2.0kVAC, 1min (20mA)
Input ~ Output (dotted line) : 3.0kVAC, 1min (20mA)
( A ) HWS30A/ME, HWS50A/ME
(
B ) HWS100A/ME, HWS150A/ME
■
Output ~ FG : 500VAC, 1min (20mA)
( A ) HWS30A/ME, HWS50A/ME
(
B ) HWS100A/ME, HWS150A/ME
Note1 :
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.
Note2 :
In case of using external noise filter, capacitance between “Input and FG” might be increased. When testing
withstand voltage between “Input and Output”, there is a possibility exceeding withstand voltage between
“Output and FG” (500VAC). Please check the voltage between “Output and FG”.
If the voltage exceeding withstand voltage, please add external capacitor to “Output and FG”.
It can decrease the voltage.
On the other hand, no need to check the voltage in case of “Output and FG” is shorted.
AC(L)
AC(N)
+V
-V
FG
Withstand
Voltage
Tester
AC(L)
AC(N)
+V
-V
FG
Withstand
Voltage
Tester
AC(L)
AC(N)
+V
-V
FG
+S
-S
Withstand
Voltage
Tester
The example of noise filter circuit that
may increasing capacitance value between
“Input and FG”
(Capacitance value in dashed line is added.)
External capacitor adding point
or short point.
Even in the case of “+V and FG”,
There is a similar effect.
