series transformer

palesha · 8th February 2006, 04:45 AM

I hv bought cd changer from USA. It works on 120V AC. We hv 230~240V electricity. There r two transformers in the circuit connected in parallel to input 120V) primary) . I want to use them for 240V input by connecting in series as shown in the attached picture. The size of two transformers is 25% diiferent. I want ur views about my idea of using them in series for 240V input.

Prasanna · 8th February 2006, 05:15 AM

Quote:

Originally posted by palesha
The size of two transformers is 25% diiferent. I want ur views about my idea of using them in series for 240V input.

Namaste Palesha,

U can use them in series, but do not forget the rule, slowest ship determines the speed of entire fleet. Likewise the transformer of the least current rating will determine the maximum current flow at primary side.

This combination I think U can try only if the current consumption is lower. If power amp is in built then I advise, do noy try proposed series combination !

Jai Hind,

xplod1236 · 8th February 2006, 05:56 AM

I wouldn't advise it. Due to the different power draws by each of the transformers, the 240v primary will not be split into even 120-120. One transformer will get more than 120v while the other one less.

Eva · 8th February 2006, 08:34 AM

They can't be safely connected in series, at least without some mechanism to ensure that the voltage is evenly split (that may be as simple as a tiny autotransformer or conventional transformer having a 0-115-230V tapped primary ).

AndrewT · 8th February 2006, 12:17 PM

Don't

audiofan · 8th February 2006, 01:16 PM

You should use an autotransformer to lower mains from 240 to 120 and do not mod your CD unit.

Eva · 8th February 2006, 03:02 PM

This will work with some tiny 3VA transformer, you may even fit it into the case.

8th February 2006, 12:17 PM	#5
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Don't __________________ regards Andrew T.

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8th February 2006, 05:56 AM	#3
xplod1236 diyAudio Member Join Date: Dec 2003 Location: On the couch	I wouldn't advise it. Due to the different power draws by each of the transformers, the 240v primary will not be split into even 120-120. One transformer will get more than 120v while the other one less.

8th February 2006, 08:34 AM	#4
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	They can't be safely connected in series, at least without some mechanism to ensure that the voltage is evenly split (that may be as simple as a tiny autotransformer or conventional transformer having a 0-115-230V tapped primary ).

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