I have recently become interested in adding coil monitoring to my utility's lockout relays. This seems like a simple but necessary thing to monitor, but I don't have a simple answer for it. While researching it, I came across a few options--one from Areva, one from ABB, and one from...
Recently we had a three-phase, wye-wye padmount exhibit high voltage on one phase. The transformer secondary is 277/480, two phases measured 286V (typical) and the third measured 311V. The problem ended up being a blown fuse on the primary side of the transformer. I would like to be able to...
