Does anyone have any history with or heard of any anecdotes of someone using remote earth intentionally as the return path on a high resistance grounded system?
I have a MV distribution system that feeds mobile mining equipment that is tied to a utility substation ground grid and is subject to...
I have read in reports and seen during testing, that substation GPR attenuates as it is transferred out to remote areas that are directly connected (via intentional grounds) to remote facilities. In the testing I witnessed, the substation had a ground fault imposed at a non-60Hz frequency...
Has anyone out there had erroneous resistor faults from their Startco (Littelfuse) SE-330 NGR monitors?
I just had an outage where two SE-330's tripped on resistor fault (based on measuring a change of resistance greater than 2500 ohms). These units were properly commissioned and calibrated...
Under what circumstances would I use a "substation" class transformer instead of a pad-mount transformer with all of the key electrical specifications (kVA, primary kV, secondary kV, oil filled, cable connections on primary and secondary) being equal.
Pad-mount are cheaper yet every industrial...
I have a medium-voltage cable run of almost 50,000 ft and because it is in an underground mine, the ground potential rise ("ground fault voltage") due to a ground fault at the remote end must be limited to 100V. The system is high-resistance grounded but with those kind of cable lengths, the...
