3 phase AC to DC

I am running 3 phase AC into a set of transformers, Y config,  and thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes. the other leg to the Y connection.
That Y connection gets warm. (why?)
Should it be connected to DC ground? 

 malua mada! wrote:

===============
> I am running 3 phase AC into a set of transformers, Y config, and thence into 
> bridge rectifiers . One leg of the output side of the transformers goes to the diodes.
> the other leg to the Y connection. 
> That Y connection gets warm. (why?) 
>

** Have you linked the " + "and  " - " of each bridge  ?  

  That is NOT how it is done.

  Google it. 

.....  Phil 

On 2021-02-02, malua mada! <fritzo2ster@gmail.com> wrote:
> I am running 3 phase AC into a set of transformers, Y config,  and
> thence into bridge rectifiers . One leg of the output side of the
> transformers goes to the diodes. the other leg to the Y connection. 
> That Y connection gets warm. (why?)
> Should it be connected to DC ground? 

The y connection should not get warm, is the connection there good?


it takes 6 diodes for a threee phase rectifier which is not normally
called a "bridge",  that term is usally reserved for diamond-shaped
arrangements that have input on two opposing corners and output on the
other two.

-- 
  Jasen.

malua mada! <fritzo2ster@gmail.com> wrote:
> I am running 3 phase AC into a set of transformers, Y config,  and thence into bridge rectifiers . One leg of the output side of the transformers goes to the diodes. the other leg to the Y connection.
> That Y connection gets warm. (why?)
> Should it be connected to DC ground? 

The connection between this and that point is wrong.

Sorry I was not aware that the term "bridge" is reserved ... but I AM using 3 bridges.  The two AC inputs on each device are joined thus doubling up / paralleling (?)  each bridges' diodes. 
I could have done it with one and a half bridges (not doubling up on diode pairs) but why be stingy.

On 2021-02-03, malua mada! <fritzo2ster@gmail.com> wrote:
>
> I AM using 3 bridges. The two AC inputs on each device are joined thus doubling up / paralleling (?)  each bridges' diodes. 
> I could have done it with one and a half bridges (not doubling up on diode pairs) but why be stingy.

That should work perfwectly so long as the DC terminals all match up.

The only reason I can think of for heat at the Y point is if the
terminals are dirty or loose.

-- 
  Jasen.