west point wrote: ↑Thu May 05, 2022 3:35 am
Ken. Thanks for the google photo. The poles were guyed all directions possible that certainly followed the guidelines. The pole was completely sheared off so pole could go nowhere but straight down. That allowed the 7200 V lines to fall onto the CAT. Must have been a spectacular 30 second light show?
Note by another. Yes, put the 7200V lines in ducts under the NRC. That underpass is certainly not very safe. I would guess that the conduit should go under the dirt side ROW 5 - 10 feet outside of present abutments.
Power line engineer told me about standards so have no cite.
For those who know some primary lines are going to higher volts around here with 25 kV being the new standard. Now does that number sound familiar? If the transformers around you have a much taller profile they are probably 25 kV. Those of you on New Haven - BOS line will note signal case transformers have that taller look from the CAT feeders.. Backup power from utilities all seemed to have 7200 kV transformers.
Agreed. PSE&G does not have any 7 kV primary, it used to be 2,400/4,160 kV but most residential areas are now 13,200 kV; commercial / industrial typically 26,400 kV and in recent years a substantial amount of 69,000 kV subtransmission has been constructed on poles along streets and roads. The line that was damaged is probably 13kV but might be 26kV, hard to tell from the photo. PSE&G's transmission levels are 128,000 and 230,000 and 345,000 and highest 500,000 kV. All of that is on private rights of way if overhead, though there are some pipe cable lines at those Voltages, except for the 500,000 kV, located under public streets and roads, especially in densely populated northeast NJ areas. I wonder if PSE&G will replace this NEC crossing with underground, and if so, will PSE&G require that Amtrak pay any incremental cost of underground versus simply repairing the existing configuration.
