An answer from my brother, Bob Furmanak. The transformer is about 98% efficient, with the losses mostly coming from electrical currents in the iron core. These are a by product which ultimately get turned into heat, which is why transformers generally feel warm. His 300 watt transformer is probably drawing about one watt doing nothing, and drawing about 3 total when driving his 1.6 watt lightbulb.
Stan Furmanak Annville, PA -----Original Message----- From: Marty.Thorin [mailto:[EMAIL PROTECTED] Sent: Thursday, January 27, 2005 12:26 PM To: [email protected]; [email protected]; [EMAIL PROTECTED] Subject: [S-Scale Modeling] RE: How much power am I using? I wish to thank everyone who has answered. Everyone is unanimous that 0.1 amps * 16 volts = 1.6 watts. That is how much power the BULB is drawing from the TRANSFORMER. But how many watts is the 300 watt TRANSFORMER drawing from the WALL to provide that 1.6 watts on the secondary? Thank you for your patience. Thorin > _____________________________________________ > From: Marty.Thorin > Sent: Thursday, January 27, 2005 10:37 AM > To: [email protected]; [email protected]; > [EMAIL PROTECTED] > Subject: How much power am I using? > > This is addressed to the electrical engineers on our list. > > If I have a 300 watt transformer (say an American Flyer 19B) with a > load of one #52 bulb across the transformer's 16 V AC outputs, how > many watts am I drawing from the line? > > I am assuming 110V, 60 Hz input. A #52 bulb is a 0.1 amp load. > > Thanks! > Thorin > [Non-text portions of this message have been removed] The poll results are in....... To REPLY to the list, use REPLY ALL, to reply to the sender, use REPLY. I do NOT know if this works on all e-mail software, but it works on some of the most common ones. Change your membership, change your message settings, use our CALENDAR, view shared files or photos, view the list archives, GO TO http://groups.yahoo.com/group/S-Scale/ Yahoo! Groups Links The poll results are in....... To REPLY to the list, use REPLY ALL, to reply to the sender, use REPLY. I do NOT know if this works on all e-mail software, but it works on some of the most common ones. Change your membership, change your message settings, use our CALENDAR, view shared files or photos, view the list archives, GO TO http://groups.yahoo.com/group/S-Scale/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
