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...
Nexans makes temporary HV cables that were used on a project I worked before. ( https://www.powerandcables.com/wp-content/uploads/2019/09/Nexans-Cable-Leads-Keep-High-Voltage-Energy-Transmission-Flowing-110kV-132kV-220kV.pdf )
They were just laid on the ground and clamped together in a tri-foil...
Below is a clip from Virginia Transformer Corp. instructions for their dry-type transformers.
Be sure to never exceed the transformer max winding temp.
It looks like ElectroRent (test equipment rental company) offers rentals in the UK and they have the Rhode & Schwarz EMI Test Receiver (ESR7) available for rent.
I'm not going to get into the cause of you client's malaise or if I'm a believer in EHS or not..... I think FacEngrPE noted you need a spectrum analyzer to identify the source. A better option would be a EMI Test Receiver as it's purpose built for what you're trying to accomplish. Some models...
Have a look at IEC TR 61000-3-13:2008 - "Electromagnetic compatibility (EMC) - Part 3-13: Limits - Assessment of emission limits for the connection of unbalanced installations to MV, HV and EHV power systems"
The company has a couple of live line demonstration trailers like this one (https://www.youtube.com/watch?v=RNoSCkA8QlI) that are run by a 5500W generator that back-feeds a 10kVA to feed another 10kVA to energize a secondary to light a streetlight, turn a meter by running a blender and a...
