7
TDK-Lambda
HWS
30A-150A/ME
Series
INSTRUCTION MANUAL
4-8. Series Operation
For series operation, either method ( A ) or ( B ) is possible.
Method ( A )
Method ( B )
Note : In case of (A).please connect bypass diodes to prevent reverse voltage.
Please select a bypass diode with maximum forward current rating more than output load current.
And maximum reveres voltage must withstand each power supply output voltage.
*Series operation for HWS100A/ME, HWS150A/ME possible without bypass diode.
Never use when one of the unit not operate, which may leads damage.
4-9. Parallel Operation
(A)
Operation to increase the Output Current is not possible.
(B)
Operation as a Backup Power Supply is possible as follows.
1.
Set the power supply output voltage higher by the amount of forward voltage drop ( VF ) of the diode.
2.
Please adjust the output voltage of each power supply to be the same.
3.
Please use within the specifications for output voltage and output power.
4.
Please select a reverse current prevention diode with maximum forward current rating more than output load current.
(A) (B)
4-10. Isolation Test
Isolation resistance between Output – FG
terminal is more than 100M
Ω
at 500VDC. For safety operation, voltage setting
of DC isolation tester must be done before the test. Ensure that the unit is fully discharged after the test.
■
Output – FG terminal : 500VDC More than 100M
Ω
( A ) HWS30A/ME, HWS50A/ME
(
B ) HWS100A/ME, HWS150A/ME
-V
-V
+V
+V
＋
－
Load
Power
Supply
Power
Supply
-V
-V
+V
+V
＋
＋
－
－
Load
Load
Power
Supply
Power
Supply
AC(L)
AC(N)
+V
-V
FG
Isolation
Tester
Power
Supply
Power
Supply
Load
+V
-V
+V
-V
＋
－
AC(L)
AC(N)
+V
-V
FG
+S
-S
Isolation
Tester
