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sensourabh
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Regarding Delta Delta Connection In Transformer

09/04/2014 12:10 AM

Why If there is bank of single phase transformers connected in delta-delta fashion and if one of the transformers is disabled then the supply can be continued with remaining two transformers with 58% efficiency.How this thing can be explain by phasor diagrame?
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lyn
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#1

Re: Regarding delta delta connection in transformer

09/04/2014 12:24 AM

Transformers - Learn About Electronics
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TonyS
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#2

Re: Regarding delta delta connection in transformer

09/04/2014 1:28 AM

You will understand the phasor diagram so much better if you draw it yourself and post it here for us to comment on.

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Tornado
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#3

Re: Regarding delta delta connection in transformer

09/04/2014 2:25 AM

/_

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TonyS
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#4
In reply to #3

Re: Regarding delta delta connection in transformer

09/04/2014 10:58 AM

My eyesight isn't good but the angle looks a tad out.

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Tornado
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#5
In reply to #4

Re: Regarding delta delta connection in transformer

09/04/2014 1:14 PM

Just allowing for a little imbalance....

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Andy Germany
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#6

Re: Regarding Delta Delta Connection In Transformer

09/05/2014 1:59 AM

Homework?

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7anoter4
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#7

Re: Regarding Delta Delta Connection In Transformer

09/05/2014 4:58 AM

Efficiency it is the ratio between outgoing power to income power. In the case of one primary broken winding in Delta-Delta transformer connection the efficiency could stay as before .But, since in order to maintain the healthy winding current limited [not more than rated] one has to reduce the power to 2/3 [67%].If the rated current of transformer winding it is I the apparent power rated will be S3=3*VAB*I [if VAB=VBC=VCA]. If only 2 windings are healthy than the limited power will be S2=2*VAB*I [only 67%].

IMO no need to show a phasor diagram [this depends on connection type-[Dd0,Dd2,Dd4,6,8,10- according to IEC 60076-1 I think].

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M.R.Iyengar
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#8

Re: Regarding Delta Delta Connection In Transformer

09/05/2014 7:22 AM

check for T, V and scott connections on internet.

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