https://www.youtube.com/watch?v=FTzrfOJkKk0
Several Youtube videos of this fire. Black smoke very noticeable where gray skys are common.
BPA seems t have a lot of transformer fires.
I know people in ths group were Lookng for th Book by GE "Industrial Power Systems Data Book".
t can be downloaded from The Unversity of Iowa.
http://digital.lib.uiowa.edu/cdm/ref/collection/uidb/id/10896
Sorry if this has been posted before.
I am reviewing a wind farm collection system.
The system is radial with up to 7 generators on one radial. The transformers are Y-D 600 volt delta -up to 34.5 kV. The tranformer terminals on the MV side are 600 amp feed thru, with dead break elbows.
The 34.5 side has a D-Y grounding...
We have got some HVAC units (Trane) with 2 pole starters (contactors) for compressors and fans in the units. All the motors are downstream from the main disconnect.
I know it will work but:
1.) I don't like it.
2.) Is it illeagle in some jurisdictions?
3.) Opening the contactor leaves the...
Does anyone have a reference to purging the conductors of medium voltage cable? Usually involves dry nitrogen, desicants, etc. I have at least one reference at home but am not there at the moment.
I am googling and will continue. I have searched this group as well but must be using the...
This is a blog that is part of Engineering News Record A magazine that is construction oriented. The artical deals with how engineering education in some schools is teaching it's students to adapt to the global business environment.
Looked like a good topic for this forum...
Can anyone tell me the power requirement for the simulator?
So far I know it's three phase 208/120 Volt. I need the load to do a load study on a facillity.
Were due to find out someday, probably after we have sized the transformer.
Thank You
BJC
I am not a reqular reader of this group but I think it would be the place to get good input.
I have recently run into a requirment for acid dipping a galvanized structure to take the "Shine" off the structure and make it dull.
The acid would be acetic.
Is it common to dip galvanized steel...
I want to fill in a row where each column goes to a different worksheet and gets the value in cell B5
The follwoing would be the first 4 cells in a row on a work sheet. The first sheet is linked to following sheet to get values for data in row.
Sheet2!$B$5 Sheet3!$B$5 Sheet4!$B$5...
I have a situation where I am being told I should power elevators and stairwell pressurization fans from the ememgency power system.
The person telling me this says the functions are safety the same as lighting. I am reading the NEC and the IBC to say I need two switches, safety and leaglly...
Is there a limit to the number of cells on a worksheet that can have if statements?
I kow you can nest 7. I want ot put 200+ on one sheet and somewhere around 60 it seems to ignore them.
I have searched help and as usual if I don't ask exactly the right question I don't find it.
sorry of...
Is ther a good reference to to find the thermal reisistiviy of concrete?
What I am looking for is a reference for mix types. If I call the local batch plant and get mix # XXX ( I would assume made to an ASTM or some standard) is there a reference to get the Rho (thermal Resistivity- in units...
I have been copying cable sizes from one one data base ( Access) to Excell and it works for everything but "ought" size cables. If I copy a size 4/0 cable it comes out in excell as Apr-00, if I reformat the cell it becomes 36617.
I know if I put an ' in front of the 4/0 will show up...
Does anyone else find the interpolation chart B.310.1 in the NEC confusing?
Has anyone ran accross a good artical with a monkey see monkey do explanation?
I want to use a 100% load factor with a Rho of 60 ( preferably 55 -which is concrete ). The tables use a Rho of 90 and 120 with 100% load...
Not exactly a power question but I know I can get a good answer here.
The 2002 NEC requires arc fault circuit interupters in bedrooms of houses and hotels. The reason is that arcing fault start a lot of fires. Most of the time it's when there feeding unit heaters or electric blankets etc that...
