No soft start?

[robert_h]

Why does my breaker trip occasionally when I power up my 250

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…