DEWESOFT V21-1 - Solution; 5.1. Supply protection box

Power supply ground loops
USER MANUAL


5. Solution

5.1. Supply protection box

An external fuse in the GND line solves this problem already. If the current through the supply line is too
high, the fuse will blow. Therefore no damage on the DAQ-system or the sensor may happen.


Image 4: The external fuse in the GND line

In addition the supply protection box provides reverse polarity protection. The current is shorted over
the diode (failure current does not flow through the sensor) and will blow up the fuse.


Image 5: Reverse polarity protection

V20-1 6/12 