tams elektronik 70-09030-01 Manual page 6

English Transformers 50 VA-16 V and 52 VA-12/18 V
Do not connect in series or parallel!
Never connect the outputs of several transformers in parallel or in
series. This can cause short circuits and dangerous voltages.
Make sure (e.g. in the event of subsequent modifications) that you do
not inadvertently connect supply lines to loads to the outputs of two (or
more) transformers.
Not like this!
Because the power of one transformer is not sufficient, in the example
shown the booster is supplied by two transformers connected in
parallel. This connection is not recommended!
Wiring errors, which can result from ignorance or accident, carry
considerable risks. There is a danger that the recovery of the input
voltage could result in a dangerous touch voltage. For toy transformers
(e.g. transformer 52 VA-12-18 V) this danger is reduced by an
integrated regenerative protection. Safety transformers that are not toy
transformers (e.g. transformer 50 VA-16 V) do not have this feedback
protection!
Parallel connection of transformers:
Danger to life through electric shock!
Page 6