Hi there;
We've got some 1940s era copper phase conductors (500 MCM) up on a 230 line that have solid CU exterior strands but hollow CU internal strands. Nobody really knows anything about it, so I was hoping to see if any Eng Tips users are familiar with this conductor. Maybe have a spec sheet...
I've got the chance to attend an EMTP-RV training session, but the catches are that the training is less than six weeks away and, oh yes, I also know NOTHING about the subject. No one will be asking me to run cases when this is all over, but I would like to have a decent beginner's understanding...
I'm curious to see what people think about the general topic of professional society attendance, in this case specifically related to local functions.
I attend the meetings both to network with industry people and also to just have the occasional good technical conversation. In addition, I...
It's that time again... Round N^1983248 of Eng vs Maint. In this corner we have 'steel cable trench lids for shielding control cable' and in the other we have 'concrete lids to reduce decapitations.'
I'm curious just generally if any of the eng-tips members hvae experience with choosing lids...
I'm trying to get some maintenance and performance history on these disconnects (preferably in the 230 kV range) and calls to several utilities have not turned up anyone that's ever even heard of them. If you know of someplace that has or has had some in service, it would be very helpful. Thanks...
I've seen some transformer specifications that use C57.12.10-1997, even though these devices are 167MVA and the referenced standard says it only goes up to 100MVA. I searched but could not find a similar standard at the same voltage classes for bigger transformers.
Anyone out there know whether...
We have been directed to purchase 230 kV breakers for operation at 115 kV. The thought is that in the future the system will be upgraded and it won't be necessary to purchase new breakers.
It is a generally accepted practice around here, apparently, and I was hoping for any comments from others...
Reviewing a transformer spec (230/69/12.47 kV, 167 MVA single rating) and noticed the following verbiage:
"Class... ONAN/ONAN/ONAN or ONAN/ONAF/ONAF at Contractor's option"
Seems curious to me that they would suggest three stages of non-forced oil and air. The engineer that put this...
I am investigating the possibility of using what someone calls a 'vertical reach' disconnect in a tight spot in a 230 yard. I would appreciate it if anyone could point me to any manufacturers of such a device, and also general information regarding the physical design.
Thank you in advance.
I've got a 230-kV disconnect rated at 1200A that I need to be able to handle a bit more (200-300A). I've heard of mechanical jumper devices that can do this. Could anyone give me some general information/manufacturers so I could do some research?
The switch is a double sidebreak Southern...
