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? 
B5f320fd 618b 43dd bfe8 e86fc11dbadckorakotta
Try it on a different circuit in your house, If it still kicks the breaker, Take it back to the hi fi shop
Perhaps it is tripping a ground fault interrupter (GFI) circuit protector in your home while the problem is not a dead short that would trip the circuit breaker at the stereo shop if it did not have GFI protection.  In any case, I would not want something that is tripping breakers and raising safety concerns even if it "works."
Does the breaker in the panel have a white TEST push button just behind the off position on the breaker?

If yes the breaker is an AFCI (Arc Fault Circuit Interrupter).

As was mentioned above try the unit on another outlet in the house fed from a different circuit connected to an AFCI breaker.

The circuit breakers at the dealer’s store are not AFCI.

Does the unit use a 3 wire grounding type power cord and plug?

See if the dealer will let you bring home either another unit or at least the store demo and try it on the outlet
Post removed 
This unit has a low voltage linear power supply for a solid state phono preamp/equalizer.  It should not have a massive bank of capacitors that would draw enough current to trip any kind of breaker.  I would not fool around with something that might be faulty--not just because of safety concerns, but, also because I would not want to fry other downstream components.
Is it possible the existing circuit is close to overload?

What happens if you plug in a house lamp?

SANDVIKA, Akershus, Norway

Joined March 27, 2018


My bad for not checking first.

I have no idea what electrical safety codes are in your country.

Make sure the PSU is for 220Vac nominal.
This unit does have an integral fuse. Unless that fuse has been replaced with something far larger than required, it would be quite difficult for it to be tripping breakers on its own.

The GFCI / spark arrestor type breakers might though.
Thank you all for the helpful answers!

I have tried to switch back the breaker after the shut down, and I couldn`t. The circuit isn`t close to overload, tried with various devices.
PSU is for 220VAC nominal.
I am very sure the breaker is an AFCI. I am renting, so I can`t do much about.
I bought the unit online and it`s working in the stereo shop, so what to do now?
Breakers are designed for safety.

Remove everything from the circuit, and attempt to reset the breaker. If you do, add one device at a time. Inspect any cables for damage. If you have a bad cable or device, it will trip when you insert it again.

If after you unplug 100% of all devices you still can't reset the breaker it requires an electrician to diagnose and fix.

@korakotta OP
I bought the unit online and it`s working in the stereo shop, so what to do now?

I don't know about Norway but here in the US AFCI protection is only required in dwelling occupancies. I doubt the stereo shop is required to have them.
  The PSU apparently is not tripping the breaker due to a short circuit or overload.

I have tried to switch back the breaker after the shut down, and I couldn`t.
I am not familiar with circuit breakers in Norway.  Did you do a search on the internet for resetting the breaker?

@ korakotta OP

Found this doing a Google search.

In Norway, it has been required in all new homes since 2002, and on all new sockets since 2006. This applies to 32 A sockets and below. The RCD must trigger after a maximum 0.4 seconds for 230 V circuits, or 0.2 seconds for 400 V circuits.

An RCD is equivalent to a GFCI here in the US.

Before you do anything make sure you don’t have a ground fault to the chassis. Measure the resistance between the hot and ground at the iec inlet and confirm there is infinite resistance.

Then check your outlet and make sure it’s wired correctly.