Glossary: Galvanic isolation
The outputs of PULS power supplies are galvanically separated from the input voltage and comply with the requirements of safe isolation according to EN 50178, IEC 60204-1, IEC 60950-1 and IEC 62103.
The design of transformers used in PULS power supplies correspond to EN 61558-2-17, which is a follow-on standard to DIN VDE 0551. EN 61558-2-17 deals with the safe isolation of transformers as they are applied in switching power supplies. There is no need for the use of expensive isolation transformers to comply with DIN VDE 0551.
In addition to the transformers, all other components between input and output must meet minimum requirements for a galvanic isolation in the form of clearance and creepage distances and insulation thickness.
Galvanic isolation between the input and the output:
Reinforced, double isolation or basic isolation with additional supplementary isolation is used for this purpose. This ensures that safety is maintained even in the event of a first isolation fault.
Galvanic isolation between the input and the protective ground:
Basic isolation is used.
Galvanic isolation between the output and the protective ground:
Function insulation is used for this purpose. The output has no galvanic association with the protective ground. It is possible to ground the (+) pole as well as the (-) pole.