Siemens SITOP 6EP1336-3BA00 Manual page 58

Applications
9.1 Parallel connection to increase power rating
Note
It is not permissible to take into account simultaneous overload capability (Extra-Power
150% for 5 s/min) of several power supplies connected in parallel when configuring the
power supply system.
NOTICE
Protective circuit for the parallel connection of more than two power supplies
When connecting more than two power supplies in parallel, additional measures must be
taken to prevent high reverse currents in the event of a secondary device fault. For this
purpose, a suitable protective circuit (e.g. decoupling diode or DC-capable circuit breaker)
must be installed between each "+" terminal of the power supply and the common
connection point.
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SITOP modular 1ph/2ph
Manual, 04.2018, C98130-A7548-A1-4-7629