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Thanks Bill, excellent questions. I will get you answers asap. Regards, RK.

Success!! Thanks Scotty I will remember that for future. File has successfully attached on my last post. Regards, RK.

Repost http://files.engineering.com/getfile.aspx?folder=cc0db7f5-c438-44cc-a95e-cea0dcaab298&file=A1_A2_B1_B3_Graphs_Summaries.pdf

Re-post of file attachment. http://files.engineering.com/getfile.aspx?folder=a6ea015d-d2a5-4d98-a5dd-8844bb20b583&file=A1_A2_B1_B3_Graphs_&_Summaries.pdf

Thanks Scotty. I will try right now.

To the site moderator: Can you see why my file attachment is not uploading via Engineering.com When I click on link submission it says everything is successful. Regards, RK.

Repost, attachment retry, again. http://files.engineering.com/getfile.aspx?folder=aea3a804-5708-48a9-b13a-2221764c8465&file=A1_A2,_B1_B3_Graphs_&_Summaries.pdf

Repost, retry.

Thanks Waross and KuanYau for your input. Waross, I am not sure why the attachment is not coming up, it came up before in another thread. Here are the answers to some of your questions: Are the transformer primaries star or delta? Delta, 95% of Ontario-Canada primaries (for non industrial...

The BAS supplier thinks there is turbulence before the fan (EF-20) because there is 50,000 CFM + coming up through an 'S' bend before the fan. Not sure if that would 'lock' the VFD current at 42A as mentioned above. Thanks for all your input. Regards, RK.

EF-20 is a booster exhaust fan and is controlled by a Danfoss VFD model no: FC-102P30T6. 575V/3 phase/ 40hp. Thanks, RK.

Hey guys, Great forum here. I am usually on the electrical side but I recently was posed with some issues on the Operations side of one of our buildings. Please feel free to read the sequence below and provide any comments. I am working on gathering supplemental data like BAS shops and...

Here is the attachment reposted. Thanks, RK. http://files.engineering.com/getfile.aspx?folder=de386422-4024-4c99-b8f6-7f4c4dc57955&file=A1_A2,_B1_B3_Graphs_&_Summaries.pdf

Thanks jraef. Great info. I will repost the attachment shortly, hopefully no errors this time. Regards, RK.

For those of you who may be asking. The power transformer secondary is a Y connection with the neutral solidly grounded to earth. Thanks, RK.

Hello All, Sorry for the delay in getting back information on this. What had happened this last month is that we had our Local Distribution Company (Utility-LDC) set up power monitors on the 600V side for 2 of the 5 buildings. This is a large complex where we have 5 separate building...

Thanks Mark. Great points. The ITO did not flag it as a concern as well and it is good to know some tips on what may effect the readings. Btw, the gear has been energized for some time. Regards, RK.

Hello All, I have recently been asked to review the Independent Testing Organization (ITO) testing documents pertaining to one of the new projects I am working on. What I have attached is a test sheet scan for one of the 27.6kV loadbreak switches (which comprises as a whole the 5 bay 27.6kV...

Hey Everyone, Just as an update. Our local utility company has agreed to install power monitors on the secondary side (here it is 600V l-l 3 phase). I will let you know what we find out in about 2-3 weeks worth of monitoring. Regards, RK.

Thanks Jraef. There are multiple ATS' in the complex not just for fire pump. I will see if I can get the logs for those as well and compare if their controllers saw a loss of phase and/or transferred. Regards, RK.