Search results for query: *

@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...

We had somewhat the same issues in the early days of residential solar when I worked as a district engineer in the distribution dept. at a local utility. We'd have the legal dept. send out a registered letter that cited the interconnection standards, safety,.... blah, blah, blah, and "subject to...

You need a grid forming inverter. https://www.energy.gov/eere/solar/articles/powering-grid-forming-inverters

This probably the same info that CarlB shared but page 3 has a nice little picture of the crane showing all the radi and their locations on the crane. Liebherr Technical Data Mobile Crane LMT 1250-5.1 Not sure if it's a one-off for you to figure out the turning path, but we used to do it the...

Not sure if you (or your company) has a AutoCAD (Autodesk) subscription or not but there is a vehicle tracking add-on that's part of some of the collections Vehicle Tracking: Swept path analysis and design software

Here's a pretty good technical guide on transformers that was produced for the AESO. AESO Transformer Modelling Guide I believe there's a section on X/R ratios

As dpc noted, the contribution is largely based on the inverter characteristics. Have a discussion with the BESS manufacturer on how their protections work. This NERL report also gives a somewhat good insight. Understanding Fault Characteristics of Inverter-Based Distributed Energy Resources

One of the local utilities here has a 2% requirement. National Grid - Electric System Bulletin 750 (Section 3.9 Load Balance) "Voltage unbalance resulting from unbalanced currents shall not exceed 2% or shall not cause objectionable effects upon or interference with the operation of the...

I've never seen an OHL design that has a "conductor catch" before.... but I could be wrong! Best practice would be to select the proper hardware to lower the probability of mechanical failure in a high consequence area. It appears that there's no shield wire above the line so my vote is still...

It's a Externally Gapped Line Arrester (EGLA) [http://www.arresterworks.com/arresterfacts/pdf_files/externally_gapped_arrester.pdf]. They're used for lightning protection on the line to prevent insulator flashovers and do not operate for switching surges if the air gap is large enough. There was...

The meter dept. used to pay out $50 to any company person who found a diversion. The meter dept. supervisor would have to confirm it before you got the paid. The meter readers were always finding upside-down meters back in the day especially when the company would mix up the 'read day' so it...

At a former utility employer we used to install what we called 'spy transformers' which was a pole top transformer with the internals removed and a meter installed inside. We'd install them on a pole and connect them to the service drop of a suspected diversion (theft). The night troubleman...

Your local Fire Dept., AHJ, and insurance underwriter may have a problem with it..... I'd check with them first. Have you looked at a dry-type solution? It may be more cost effective than an oil-filled trans. when you consider all the mitigation that may be necessary. Cooper/Eaton has a nice...