I used RS Americas when they were formally know as Allied Electronics.
You could buy a single component like one resistor... But it was cheaper if you purchased 100 resistors.....
They also had a really good selection of items as well.
As waross said it would probably cancel out.... if the crossing is truly at 90 degrees.
You probably need to do some analysis with an electromagnetic software like SES CDEGS to show there is no issue.
I'd discuss with the FO cable operator how the repeater power works and then go from there to...
"NERL Scientists Studying Solar Try Solving a Dusty Problem" https://www.nrel.gov/news/features/2021/scientists-studying-solar-try-solving-a-dusty-problem.html
There are a couple of companies out there who have commercialized a product discussed in the NERL article.
You need to consider the "steady state" reactive power capabilities as well.
Below is a clip from the ISO-NE Planning procedure 5-6 regarding reactive power capability testing. (FYI: it says wind park but it actually applies to all inverter-based generation.) I've (poorly) highlighted the...
Yes. Compliance with FERC 827 requires the reactive power capabilities to met at the high side of the station transformer. Some interconnections requirements say it's at the point of interconnection (POI).
As warross noted, the LTC could have a significant impact....
I'd check with the...
The utility I work for has lots of electric substations that are subject to vehicle "incursions". Some are at the edge of parking lots, some are next to highways, or on city streets. They employ everything from bollards to guardrails to cable barriers (...
I had a similar issue with a dry contact from a transformer bucholtz or beta relay. We put loading resistors across the input at the opto board and it solved the problem.
I remember making a simple circuit calculation using the opto board input impedance and pick up voltage to determine the...
During my time as utility district engineer in a coastal area in the northeast, there was a peninsula with a few hundred customers which was subject to flooding during nor'easters. The peninsula had only one road in and out. If the Fire Dept. had to do water recuses they'd request the power be...
Probably some very bad voltage. There are lots of things wrong with the drawing including xfmr on the right appears to have only one secondary connection and the "X" bushing nomenclature doesn't look right. But the drawing is probably trying to go for a 3ph 240V open-delta maybe?
This is a...
There is no requirement that I'm aware of regarding the minimum distance for vehicles from a substation fence. The fence should meet NESC Rule 110 to maintain clearance for unauthorized persons.
If your substation lives in "NERC land", then it may be subject to the NERC Physical Security...
The US Energy Information Administration [US EIA] has a "Annual Electric Power Industry Report" (https://www.eia.gov/electricity/data/eia861/) That I believe has all the annual SAIFI, SAIDI, CAIDI, etc. information from the reporting utilities.
Just in case you don't know how to calculate all...
@adi3291. From what I "remember" [wink], the lower number in the range that Parchie gave is a good place to start until you get the info directly from the OEM.
Tesla has a document that describes the short circuit contribution and how to model it in ASPEN. This document is only available from Tesla under an NDA.
The short circuit contribution from inverter-based resources is manufacturer specific and is based in their inverter hardware and controls...
