TDK-Lambda G30-170 - Series Operation; Series Connection for Increased Output Voltage

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3.4 Series Operation
Power supplies of the same model can be connected in series to obtain an increased output
voltage. Split connection of the power supplies gives positive and negative output voltage.
WARNING
When power supplies are connected in series, and the load or one of the output terminals is
grounded, no point may be at a greater potential of +/- 200VDC from ground for models up to
100VDC rated output and +/- 600VDC from ground for models 150 ~ 600VDC rated output.
WARNUNG
Wenn Stromversorgungen in Reihe geschaltet werden und die Last oder eine der
Ausgangsklemmen geerdet ist, darf kein Anschluss ein größeres Spannungspotential bei den
Ausgangsmodellen bis 100VDC von +/- 200VDC gegenüber Erde aufweisen. Bei den
Ausgangsmodellen 150 ~ 600VDC kann das maximale Spannungspotential bis zu +/- 600VDC
betragen.
3.4.1 Series Connection for Increased Output Voltage
Two units are connected so that their outputs are summed. Set the current limit of each power
supply to the maximum that the load can handle without damage. It is recommended that diodes be
connected in parallel with each unit output to prevent reverse voltage during start up sequence or
in case one of the units shuts down. Each diode should be rated to at least the power supply rated
output voltage and output current. Refer to Figure 3–5 for series operation with local and remote
sensing.
Series connection, local sensing
+V
POWER
SUPPLY
+
LOAD
-V
POWER
SUPPLY
-V
+V
-
(*)
(*)
Series connection, remote sensing
(*) Diodes are user supplied.
Figure 3–5: Series Connection, Local and Remote Sensing