Hello. I was recently told by a colleague in Europe that transformer manufacturers in Europe are not recommending ester oils, either natural or synthetic, on new units. Supposedly, there are some issues people are seeing. This seems a little different than I have heard. Are there long term...
We are looking at installing an induction generator into an industrial facility. A question has come up to the inrush of the machine if it is accelerated to synchronous speed by the prime mover before the generator breaker is closed. In my mind, this is essentially the same thing as energizing...
How compatible is equipment with Class 1 Div 2 rating with a Class 1 Zone 2 area in North America? Some of the equipment we are trying to use only has the Div rating, and not the zone.
We have an existing 230 - 69 kV substation that is rated for 40 kA on the 69 side. We are looking at building a second sub on the south side of the refinery that will operate with a 69 tie between the two stations, keeping them in parallel. Our studies are showing a SLG fault level of 39 kA. How...
I work for a refinery putting a new substation building in. This is the first substation in our refinery using SEL relays and is additionally piloting a SCADA system for future consideration. The refinery uses GE-Fanuc PLC's exclusively, so we installed redundant RX7i PLC's in the building and...
