> Subject: Questions concerning Block Transformer VB 0,35/2/6

>Dear Mr. Colquitt,
>
> Concerning your questions in your e-mail to Mr. Kirchner, i have
> been given the following answer by our technical department:

> "Regarding your concerns and problems with our VB 0,35/2/6.
>
> Firstly you are quite correct in your diagnosis that the transformer =
is
> very close to saturation. This is more apparent under no load =
conditions
> than under full load, and is mainly due to the very small percentage =
of
> iron core present in these small transformers.
>
> The temperature rise under no load condition can certainly be higher
> than in a heated condition under full load.
>
> At 70=B0C ambient and 100% load and temperature stability the =
temperature
> rise should be expected to be approx. 40K.
>
> The DC resistance of the primary winding should be approx. 14870 Ohm.
> This very high resistance is needed to obtain the inherently short =
circuit
> proof characteristics, of the transformer."
>
>
> We hope that this information will be of help to you, and for further
> information or question please do not hesitate to contact us.
>
> Very best regards
>
> BLOCK Transformatoren-Elektronik GmbH & Co KG.=20
>
> i.A. Cord H=E4vecker
>
> After Sales Services
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