tag:blogger.com,1999:blog-8022109203467084939.post7129959083034266061..comments2024-03-27T22:16:54.154-07:00Comments on Gun Geek Rants: Medium Voltage FunTXGunGeekhttp://www.blogger.com/profile/13405501054321031442noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-8022109203467084939.post-72698665522771953842012-04-13T14:16:30.672-07:002012-04-13T14:16:30.672-07:00WOW did I suck at that type job.
someplace
start
...WOW did I suck at that type job.<br /><br />someplace<br />start<br />1200RPM<br />We<br />twoTXGunGeekhttps://www.blogger.com/profile/13405501054321031442noreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-81478725960689688062012-04-13T12:41:29.127-07:002012-04-13T12:41:29.127-07:00Yup, there is a new kid soon to be on the block. T...Yup, there is a new kid soon to be on the block. They were looking for so,eplace that was not mission critical application that they could test and we fit that bill with a soft satart as an alternate way to just run the motor at 2100RPM straight. we have some complicated switchgear in front and behind the SS and VFD to switch between the twoo in case we have issues with the VFD. Promises to be interesting.TXGunGeekhttps://www.blogger.com/profile/13405501054321031442noreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-8899478968432537982012-04-13T11:27:28.245-07:002012-04-13T11:27:28.245-07:00Somebody else is joining the party? Interesting. ...Somebody else is joining the party? Interesting. I figured it was an ABB, Allen-Bradley, Cutler-Hammer, Siemens/Robicon or Toshiba. 3kHP @ 5kV is pretty standard for all of those guys.Kevinhttps://www.blogger.com/profile/10324035824298948422noreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-84003072183405960842012-04-12T18:05:29.663-07:002012-04-12T18:05:29.663-07:00Kevin, I can't comment on the manufacturer of ...Kevin, I can't comment on the manufacturer of the drive, it is a prototype, actually a beta unit so we are not disclosing that part. THe motor is a TECO/Westinghouse. Yes it is a big jump in power but the prop is rated and structural analysis says the tunnel will handle it. We likely won't be pushing it that hard to start though. We have a series of typical tests coming up before we have any time to really characterize it so we can push.TXGunGeekhttps://www.blogger.com/profile/13405501054321031442noreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-43566352546242080312012-04-12T15:16:52.691-07:002012-04-12T15:16:52.691-07:00Whose drive? And going from 1kHP to 3kHP? That&#...Whose drive? And going from 1kHP to 3kHP? That's a pretty significant step up!Kevinhttps://www.blogger.com/profile/10324035824298948422noreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-31204027200610866652012-04-12T09:54:29.104-07:002012-04-12T09:54:29.104-07:00According to our engineers at the time, running th...According to our engineers at the time, running the already depreciated 800 HP synchronous motor doing no useful work (I think it turned a fan) and paying for current to it was still economically better than paying extra for having a low PF or buying a new capacitor bank for PF correction.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-65628022689390118412012-04-12T05:16:50.533-07:002012-04-12T05:16:50.533-07:00Actually, I went back and changed the description....Actually, I went back and changed the description. Not sure where it came from. We installed a 2400KVAR capacitor bank. That is there for line conditioning. About 600 of it is for existing phase issues and the rest is for the induction motor should we ever run it with the back up soft starter instead of the VFD that is the primary control. Running the synchro motor would just be a waste of power at that point.TXGunGeekhttps://www.blogger.com/profile/13405501054321031442noreply@blogger.comtag:blogger.com,1999:blog-8022109203467084939.post-59061776988107233632012-04-11T08:59:18.687-07:002012-04-11T08:59:18.687-07:00I worked in a manfacturing plant that had one larg...I worked in a manfacturing plant that had one large old 800(?)HP synchronous motor left over from the 1940's. The plant utility engineers loved it. They ran it idling, meaning not doing any useful work, to use for power factor correction. I am surprised the Aggie Engineers didn't want to keep it around.Anonymousnoreply@blogger.com