Hi Jim For the transformer secondary you can find out the gauge of the winding wire used. The cross section area should indicate the current carrying capacity of the conductor and if you have dual secondaries., based on the consumption pattern and sequence of loading it should be simple to work out the power ratings.. you can power up the primary and connecting fuses in series on the secondary side , load the windings..to find the maximum current that can be drawn... Good luck Hemang
-----Original Message----- Johnson Sent: Monday, November 22, 2004 9:50 PM To: Multiple recipients of list CHIPDIR-L Hello Group, Maybe a little off topic but hopfully somebody can help or steer me to someone who can. I have a relatively large power transformer I believe was from a computer related application. It has core dimensions of 1 1/4 x 5 1/4 x 4 3/8 and I am trying to get an idea of it's power rating. I has three primary taps for 105, 115 and 120 volt operation and 2 secondaries. One secondary has a centertap with large lugs for a high current 5 volt supply. By stepping up the load over a few hours, I was able to get the OTHER ONE, WITHOUT a centertap and smaller lugs, to provide 12.38 amps at 26.44 volts, drawing 3 amps input at 120 volts. By feel it seems to get a little to warm to touch after an about hour. I'm guessing it's at least 100 degrees f. The numbers on it are as below but I was unable to find out anything with them. ECT-100-115-20 72149-2405A2 How can I determine the capable amperage without overloading it? Also most of the supplies I have seen use a centertapped winding with a full bridge. Could I still get the same results by using it without a centertap and create my own ground reference or is this the wrong animal to use to build a high power supply? If so, can anyone use it? Thanks and sorry for the long post Jim -- Author: Tim Johnson INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Author: hpelectad1 INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
