RE: OLTC Measuring Peak Current

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Steve Conner" <steve.conner@xxxxxxxxxxx>

>now thats a nice idea! what size stock was the stainless

Don't forget isolation. Current transformers isolate your measuring
equipment from the primary, and a shunt doesn't. Hence you can't use a shunt
on a H-bridge output as there will be high voltage RF on the scope ground.
You can float the scope but there will still be high capacitive currents
flowing through its line filter. This can cause you to measure "more"
current than is really there due to common mode effects.

One possibility would be to float the scope and use dozens of ferrite beads
on the coax between shunt and scope. Or you can just forget it and use a
Rogowski coil instead.


Steve C.