I have a 110V DC transmission line that's power a lot of monitoring equipment. I am trying to design a non-intrusive way of finding earth faults within the DC system. What I am trying to do is inject a 3V square wave into this transmission system. If there happens to be a fault in the system, then the square wave will lead me to the fault by forming a full circuit loop. I can then trace this loop using a Hall Effect sensor.
The image below is a rough sketch of what I am trying to do. Of course, there will be a lot of resistors, capacitors and inductors in parallel within the DC transmission system.
When I try to use an oscilloscope to find the square wave, I can only see intermitten vertical spikes. Also, does this design even work? Are there other designs out there that I should know of? Thanks.
The image below is a rough sketch of what I am trying to do. Of course, there will be a lot of resistors, capacitors and inductors in parallel within the DC transmission system.
When I try to use an oscilloscope to find the square wave, I can only see intermitten vertical spikes. Also, does this design even work? Are there other designs out there that I should know of? Thanks.
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