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Depends on what modules and number of buses you want.

Hi ScottyUK, I have attached a drawing showing the layout of the substation. The substation building is rated 10PSi (69kPa). Hope someone share their ideas. Thanks http://files.engineering.com/getfile.aspx?folder=c48a6f26-03f0-4852-980d-8fcfa7c9684e&file=BUS_DUCT_on_BLAST_RESISTANT_BLDG..pdf

Hi Everyone, I need your experience regarding the subject above. We have an ongoing FEED project in one of our client, an Oil & Gas refinery, one of its substation is to be demolished and replaced with new one, a total replacement of old and obsolete 11kV substation. As required by client, a...

Thank you for all the replies..

Hi Everyone, What would be the PERCENTAGE VALUE of OPEN DELTA TRANSFORMER? Thanks

My apology to All, Title suppose to be DC CABLE SIZING, I am suppose to edit the title but I don't see a tab to edit the said title. Type of Cable = XLPE No. of Core = 2 cores Acceptable VD = 3% Type of Installation = Installed in Air (ladder) Now, is 70mm2 cable is sufficient to handle a...

How to size the cable for the data given below: Considered Cable = 70 mm2 Route Length = 110 m Load Current = 57.27A Voltage = 110 VDC

sspeare, My calculation on the first (top) page is approximately equal to your example. Please correct me if I am wrong. My calculation is based on Article 430 Part IV, 430.52(C), Exception No. 1. and, I think that answers also your question: (can you tell this Forum: what the "nearest...

Hi dheXjhe, etap info of 400A CB. see attached. Thankshttp://files.engineering.com/getfile.aspx?folder=b05643d1-10c5-4c70-bb5a-8d2dc2f06133&file=LF400CB.pdf

I suspect sophisticated softwares comes and derive from fundamental mathematical equation and the bases of decision making. Here is the etap alert. Kindly share your knowledge on the software. I choose CB size 150A and it gives alert. I choose CB size 250A and no alert given. I choose CB size...

Ok guys sorry if i am lazy reading the standards perhaps maybe i don't have the reading material and because i am new in the field of design and i have to ask my friend to provide me electronic copy of NEC. the sample motor i have posted is from training example of etap. i am just wondering why...

Hello Everybody, I am new in the design analysis and we are using analysis software. In the example, the data are given below. Rated kW = 110 kW Rated kV = 0.38 kV Rated PF = Typical Rated EF = Typical Slip = 0.8 What will be the size of the Protective Device (PD) of the motor? Can someone...

Thanks for the reply.

Can someone explain to me what and how %TAP of Distribution Transformer affect the system. Why and when do we need this? Thanks