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Anonymous Poster #1

Single Phase Transformer Parallel Operation

09/05/2011 9:15 AM

i would just like to ask if it is possible to combine 2 single phase transformers in parallel operation supplying a single phase load? the transformers are to be connected on a single phase primary line and will have an output of single phase secondary line. is this possible?
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tcmtech
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Join Date: Jun 2009
Location: South of Minot North Dakota
Posts: 8376
Good Answers: 775
#1

Re: single phase transformer parallel operation

09/05/2011 9:17 AM

Yes its a very common thing to do.

As long as your primary and secondary voltages are the same they will work together as a larger transformer.

Ideally two or more identical transformers should be used though.
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Anonymous Poster #1
#3
In reply to #1

Re: single phase transformer parallel operation

09/06/2011 8:57 AM

can you give me all the requirements for this to work?

thanks sir..
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hithuanand
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India - Member - New Member Engineering Fields - Electrical Engineering - New Member

Join Date: Apr 2010
Location: Asia/India
Posts: 365
Good Answers: 1
#2

Re: Single Phase Transformer Parallel Operation

09/05/2011 11:20 AM

You need to find the polarity of secondary side of the transformer inorder to share the load.
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Anonymous Poster #1
#4
In reply to #2

Re: Single Phase Transformer Parallel Operation

09/06/2011 8:59 AM

should the transformers be of the same polarity or different?

thanks
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hithuanand
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Join Date: Apr 2010
Location: Asia/India
Posts: 365
Good Answers: 1
#5
In reply to #4

Re: Single Phase Transformer Parallel Operation

09/06/2011 11:35 AM

use proper rated voltmeter and measure for zero volts.
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cuba_pete
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Join Date: Dec 2010
Posts: 1895
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#6
In reply to #4

Re: Single Phase Transformer Parallel Operation

09/08/2011 2:48 PM

These are transformers...they are polarized by the taps and connections to the primary and secondary.

They are intrinsically the "same" and "different" polarities.
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