
SYS POWER SUPPLY UM E
2.2
Electrical Structure
For power supply units a distinction is made between input and output variables. For a
better understanding, the variables are illustrated in
Figure 2-3.Input
Input voltage
Frequency
Inrush current
Current consumption
Input fuse
Power factor
Mains buffering
Harmonic filter
PFC
Primary grounding
I e
+
Output
Output voltage
Output current
Output fuse
Start-up relay
Control deviation
Rise time
Residual ripple
Reverse voltage
Secondary grounding
I a
+
U e
~ AC
-
-
DC
U a
Climate
Ambient temperature
Humidity
Altitude
Vibration
Shock
5598D003
Figure 2-3
Assignment of technical data
The electrical configuration of a power supply unit determines its operational safety,
availability and the guaranteed protection of persons. Compliance with all safety
parameters is of decisive importance.
2-4
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