Hopkins wrote:

>As has been suggested a current transformer is the way to go as they come in
>different current ratings and will out put a voltage proportional to the
>current.
>
A current transformer is NOT the way to go.  The OP wants to measure DC
current from the output.  A current transformer won't tell him
anything.  The correct/traditional approach is to move the current sense
resistor into the ground leg of the HV output (or the return path of the
load).  Hall effect and other high side approaches were mentioned as
alternatives but none of them is as simple or straightforward as moving
the sense resistor to the correct location.

Dave

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