Yes, it is a typo. It should be r =b =0.

Shri

> On Aug 26, 2015, at 6:47 AM, "Vladimir Frolov" 
> <[email protected]> wrote:
> 
> Dear Matpower community,
> 
> My question is about tap coefficients. It is said in the data description 
> that branch includes transformer if r=x=0. But actually in cases r and b =0. 
> Is it misprint in data description or should I consider given values for x as 
> b.
> 
> Best,
> Vladimir
> 


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