Just wondering if there is any consensus on approved coatings for subject busbars handling 7000+Adc?
Specifiers and suppliers from Europe tend to use nickel per ISO 4526/4527 as a plating material.
North American suppliers tend to supply tin or silver as the recommended choice, although I have...
Thanks for the responses. The 13.8 kV gear is fed by a 72 MVA tx so the currents are significant. Three of the loads are 11 MW pump motors. Again big currents. The problem goes away when the various pumps are shut off. All cables are 3 phase cables. Vacuum bottles. motor operated, spring...
I am at a new construction 500 MW power plant where the various pumps, fans and other rotating equipment are going through their initial runs.
The 13.8 kV and 6.9 kV switchgear is located on the 9 m elevation on an 8" (I believe) reinforced concrete slab.
Several (but not all) switchgear units...
We have a 500 kV switchyard with a ring bus. The 500 MW generator feeds through a GSU to a 500 kV disconnect into the ring. We have a CT on the primary of the GSU and one each at the breaker.
My understanding is that the differential being used is not protecting when the disconnect is open...
We have a 546 MW, 22 kV generator that was factory tested using DC hipot at 45 kV with good results.
The plant I am at presently was wondering whether using a VLF test set as the baseline field measurement would be better than repeating the DC test at site (albeit at a lower "field" value).
I...
We had an incident at a client of ours where they were transferring Toluene from a drum to a smaller container. The containers were grounded, but a spark ended up causing a small fire. Thankfully injury to the worker was not significant, but he did suffer 2nd degree burns on his arm...
Alexandergr8, I saw you saying you are taking your masters in power. Might I enquire as to where you are taking it? I am looking for an online place to take it since most of my jobs keep me moving.
Thanks
I have read in many suppliers sites/catalogues about the role copper plays in aluminum electrical equipment. Most of the time, manufacturers take great pride in identifying that they have no more than 0.1%, 0.4% or 1.5% copper in their aluminum products (typically cast, not forged). Can you...
Where an area is classified as Cl 1, Zone 2, do the junction boxes that have only terminals need to have a certification rating on the box?
Will the box be any different than a box in the same service in an unclassified area, except that perhaps the manufacturer may omit the label indicating...
We have a PD Pump that we are just commissioning. The pump is intended to boost pressure for a Meg line from 14 MPa to approx 17 MPa. The turndown is supposed to be 10-1. The Variable Speed Drive has been programmed for 6-60Hz operation. The high pressure to provide suction to the pump is...
Can anyone advise of what the error would be on a Type K thermocouple that is measuring flame temp on a flare tower where Type K extension leads are used all the way to the host comntroller located in the control room. At this point the extension leads go through a pair of ordinary SAK type...
