Blew another damn transformer on my Trane XB80
"Don Klipstein is Full of Bull " Measure both AC and DC current through the secondary of the transformer. If putting a multimeter into DC current mode gets a reading around or over 50 milliamps (,05 amp), then something is wrong with the load. If DC secondary current is near or over 200 milliamps, then, "Houston, we have a problem"! ** Simply fitting that DAMN 1/4 amp s-b fuse will tell you immediately if any such problem exists. Significant DC in the secondary will causes high current to flow in the primary ( due to core saturation) and BLOW the fuse !!! If the 1/4 amp fuse holds and the tranny does not get stinking hot - all is OK. ..... Phil |
Blew another damn transformer on my Trane XB80
Measure both AC and DC current through the secondary of the transformer. If putting a multimeter into DC current mode gets a reading around or over 50 milliamps (,05 amp), then something is wrong with the load. If DC secondary current is near or over 200 milliamps, then, "Houston, we have a problem"! I have been (sort of) following this conversation. I assume this transformer also drives the contactor for the AC compressor. Maybe there is a short in that circuit and the transformer secondary gets shorted when the thermostat calls for cooling. David |
Blew another damn transformer on my Trane XB80
On Fri, 15 Apr 2011 14:04:11 +1000, Phil Allison wrote:
"Tony Hwang" This isunthinkab;e crazy idea but is the x-former being put in backward? ** You must be totally schizo. Ironic statement of the year candidate! -- Live Fast Die Young, Leave A Pretty Corpse |
Blew another damn transformer on my Trane XB80
On 4/14/2011 11:18 PM, Tony Hwang wrote:
Phil Allison wrote: The fuse is not being put forward as a solution - just to avoid blowing the transformer while finding the real problem. ** The fuse will actually help you diagnose the problem. If the fuse opens soon as AC power is applied - the tranny is being overloaded. If the fuse opens after some time because insulation in the primary side has failed, replacement fuses will open immediately despite the secondary being disconnected. ...Phil Hmm, This isunthinkab;e crazy idea but is the x-former being put in backward? Rgwew i a such thing as current limiting x-formers. One thig I'd try then I'd put in proper Wattage low value resister to lower the primary voltage. My word, you need sleep or something. Backwards would, oh never mind you just proved you have no electronics knowledge. |
Blew another damn transformer on my Trane XB80
"Tony Miklos" ** FFS - learn to TRIM !!!!!!!!!! |
Blew another damn transformer on my Trane XB80
OK ;-)
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Blew another damn transformer on my Trane XB80
Tony Miklos wrote:
OK ;-) An example of excessive trimming... John :-#)# -- (Please post followups or tech enquiries to the newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
Blew another damn transformer on my Trane XB80
Top posted, too!
-- Christopher A. Young Learn more about Jesus www.lds.org .. "John Robertson" wrote in message ... Tony Miklos wrote: OK ;-) An example of excessive trimming... John :-#)# -- (Please post followups or tech enquiries to the newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
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