Wow! What kind of three-phase power is this - delta or wye? Is this an example of the neutral conductor not being grounded, and just being a tap on a transformer?
On Mon, 28 Jun 1999 17:10:42 -0700, Donald Kimball <dkimb...@qualcomm.com> wrote: >At 12:08 AM 6/29/99 -0700, mvald...@netvision.net.il wrote: >>What voltages can I expect on the Neutral (referenced to ground) line in >>various countries >>and connection systems? Is there a limit on how high the voltage may be, >>both in normal and >>fault conditions? > >Some of our Cellular base stations are located in regions of Chile where power >is being intentionally turned off due to low water conditions at >hydro-electric plants. We have been montoring the voltage at these sites due >to concerns about the battery backup system. The cell sites use 380V Line to >Line, 220V Line to Neutral, 3-Phase power. During restoration of power, the >voltage on neutral sometimes rises to 220V Line to Ground for several cycles. >The voltage on the phases has been measured as great as 440V Line to Line for >several cycles, with Line to Neutral voltages as high as 380V. There does not >seem to be much power available during this transition time with the wild >voltages. > >Preliminary measurements in Brazil are showing some of the same results. The >load regulation at remote sites seems to be a problem. > >Don Kimball > > >> >>thanks in advance, >>Moshe >>-------------------------------------------- >>Name: moshe valdman >>E-mail: mvald...@netvision.net.il >>Phone: 972-54-881334 >>Telefax: 972-3-5496369 >>Date: 29/6/99 >>Time: 0:08:41 -- Patrick Lawler plaw...@west.net --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
