Hi all,
I'm looking for manufacturers that handle utility level Rogowski Coil type current sensors similar to the ones that ABB has available. Link Below. Thanks!
All very good information. Thanks again for all your time. Correct me if I'm wrong. Assuming Asymmetrical fault always exists on the line during the fault the faster you open the breaker the larger the breaker has to be because the earlier you open it the more Asymmetrical fault current will...
Thanks again for all your help. Just to be clear and verify we are both talking about the same thing I've attached a link to a document. Page four talks about Asymmetrical current faults. This is what I am referring to as a DC-Offset fault. Figure eight is a good example of what it looks like. I...
Your responce indicates to me that your able to detect and perhaps measure the presence of these DC-offest faults. I'm wondering what sensors/transducers and/or metering apparatus your using to detect the presence of the actual DC-offsets. Thanks
Hello all,
On occasion there has been known to be DC-offsets that occur on 38KV utility lines during some fault conditions. The fact that these faults rarely exist still prompts the switchgear controls to delay opening the breaker five cycles. Apparently the DC-offset fault is cleared in most...
