It’s normally the wrong type of circuit beaker. You need type C as opposed to type B which is standard.
The 250 has a large transformer and when turned on you will get a large inrush of current which trips the breaker.
I have type B and get the same problem when the Supercap 2 is switched on.
The 135s, 555PS and XPS2 are okay when turned on.
I will change the MCB at some point.
I wouldn’t worry too much about it. Just turn the MCB back on with the 250 still on and you should be okay.
I don’t believe it will damage the 250 but I will stand corrected!