Search results for query: *

mc5w... ass-suming you had read or seen the IEEE C57.91 standard, you would see that it has more to do with life expectancy changes for LT and ST overloading the transformer (and nothing to do with fan speed). If your transformer was liquid filled and built to C57 standards, the standard...

Review IEEE Std C57.91. That is assuming you have verified cable / buswork, CT's, and relaying for the application.

Get a copy of IEEE 835 (formerly ICEA P-46-426). It has tables that cover your application, or you can do the calculation manually.

Check out: http://www.cooperpower.com/Library/pdf/32005.pdf http://www.cooperpower.com/Library/Literature/section.asp?ProductLineID=14

IEEE C62.22 recommends that for a delta connected primary you configure 3 arrestors in a wye configuration (rated at line to neutral voltage) with a fourth arrestor connecting these three to ground. Ref IEEE C62.22 Figure Eight on Page 28 (Sect 5.5.4.2). Does anyone have any physical drawings...

I have used the recommended level for a security gate from IES before.... they recommend 1FC (.25 min) for vehicle and 2FC(1 min) for pedestrian access points. They use a 25' or 50' area. The substation guides for rural substations use a 1FC uniform number for the equipment areas. I agree that...

See Okonite for a more long winded explanation: http://www.okonite.com/engineering/electrical-formulas.html

IEEE C57.12 includes single phase to ground, two phase to ground and three phase faults as withstand tests/design criteria for liquid filled transformers. Is it logical to assume that a transformer should withstand a three phase TO GROUND thru fault on the secondary as well. This is sometimes...

Sorry to have joined so late, better late than never I guess. We were lucky enough to have a Mirus rep come thru the office and do a presentation a few months back... an excerpt of my notes from the presentation. Lineator: "Simple line reactor with multiple windings on a common core" (I...