Search results for query: *

You have chosen the cable tray as your ground reference, which is about all you physically can do.

A TDR with surge pulse can find the fault for you. Or a cable fault Bridge, assuming you have a good phase still.

I think you should wait for an outage, in order to isolate the cable ends and connect a tone to the select cable, with it grounded at the far end. Trying to follow 60Hz load current with multiple cables in raceways is simple, but not really specific to the particular cable you are interested in.

A ground conductor allows fault voltage to trip the protection device, other wise a dry earth environment may allow the fault to remain energized and dangerous. When fault locating a cable fault it is nice to have a ground reference so you can use a time domain reflectometer to relocate the...

In dielectric testing insulation that is in an air environment we use a positive ground reference. Most DC test sets output a negative DC voltage at the HV test lead, so you really don't have a choice. What is important in cable sheath HV testing is the ampacity of the test set, a simple...

A short thumbnail sketch of humanity in 2015 (~10,000 years after we crawled out from under the last ice sheets) Fellow "scientists", we are a very fine group of humans in a very unique period of Earths existence. We can communicate now using electrons, we can use the Earths resources in ways...

I have done HVDC testing on 1000V XLPE building wire. I placed the wire in a conductive bath without any stress relief at the air/water interface and raised the test voltage. It held 50 kVdc for one minute. I would suggest a 25 kVpeak "BIL" rating for 600 Volt XLPE building wire would be...

An often overlooked maintenance procedure is a simple visual inspection of these ground cable tails assemblies. The mechanical connectors should be electrically bypassed and then disassembled, cleaned and brushed, and reassembled with new hardware, or at least bolts, and actually torqued to a...

We mounted the PMG on an off machine rig for stability. We hooked up a stiff two wire 240 volt supply through thermal manual 50A CB's to the PMG terminals. We then performed a simple very quick manual close - open with the 50 CB . The PMG unit ran up in speed and gained magnetism through the...