rockman - The NESC is not nearly as prescriptive on conduit depths as the NEC. In fact it is quite vague and the NEC can sometimes be used as a general guide for many installations that would fall under the jurisdiction of the NESC. That being said - Rule 322A3 states that you must consider...
Not so much recommissioning, but experience with voltage conversions (upping voltage). The eng-tips thread pasted below sums it up well. Typically there is not an electrical test per se. The line is visually expected in detail (ultrazoom camera or drone, binoculars minimum) to verify presence...
rockman
A big deciding factor will be location and number of points of delivery/utilization. How many locations on this site will the distribution voltage need to be stepped down again to a utilization voltage? 34.5kV to utilization voltage (480, 120, etc.) transformers are much less common and...
Adding to bacon4life - Preformed Line Products (PLP) makes air flow spoilers and dampers to affect how wind flows over conductors, depending on what condition is causing contact between the lines (simple blowout, galloping, etc.)
I've far from seen it all, but I am unaware of any fully insulating covers that could be used for this application. JJ_Roy has already shared the Hexdrix spacer system for 115kV. If you have the ability to properly analyze the structures for use with this system, it may be a good choice.
The...
I am always fascinated to see other regions/countries methods of construction. Aerial mounted breakers are typically referred to as reclosers or automatic circuit reclosers. Nearly all of my experience is in North America so I do not know the terminology or manufactures in the IEC world. I have...
1916,
Thank you for the clarification on your question. The answer is yes, there will certainly be an effect of paralleled or bundled conductors, although probably less than you may be worried about. I would:
Search and read "ATC Substation Equipment Ampacity Ratings", document # CR-0063...
1916,
Download RUS Bulletin 1724E-300, read 4.10 regarding bare conductors. That will answer the straightforward questions. IME, using the largest single conductor up to about 2500MCM is best, dictated by ampacity. Above 2500, conductors are difficult to work with and connectors are harder to...
Nick - MV & HV terminations experience much greater electrical stresses than a LV termination, at least given the amount of material & space the termination must fit into to. The cost of failure of MV termination is also likely much higher than a LV one. The total damage or safety risk is going...
Bill,
Thank you for sharing. Understood on the ratings & generator limitations. The insight on the battery chargers & block heaters was not something I had considered. I appreciate the first hand experience and examples.
CAT Specsizer. I picked up on the sizing being dictated by the maximum...
Hi All,
I am in the process of sizing a standby generator(s) for a large commercial building, approx 1 mil. square feet. Mixture of offices, warehousing, labs (think data center), & some small cafeteria areas. I've made good progress on areas I am familiar with such as offices, lighting, etc...
As Cuky stated, the UoWI classes are the best route. Reach out to the university and ask about options for classes abroad, group discounts, possibly even remotely attending the course. Also correct that just having the software itself is not enough, and in fact can lead to more errors. PLS is...
Definitely a thing. Modern GOAB's can be fitted with motor operation(MOAB) and can be remotely operated. You can also install metering/SCADA only equipment and feed that into protection and supervisory systems. Tons of factors, tons of choices. The Utility I work the most for rarely installs...
