External PSU shuts down the breaker

Hi! I have a Gold Note PH10 phono and just received the PSU 10. After I turn on the PSU, it shuts down the breaker in the house. I have tried to plug in without connecting the phono, same results. It was all right when I tried in a HIFI shop, and worked well, even connecting to the phono. I would be suspicious, but every single component is working good (with higher load also), except the PSU.
What can it be?