Yes we've tried a couple of softstarts. The original system acted like it was two phasing so when I was poking around I thought I found a short. To my chagrin I found it was designed like that. Then tried a softstart that chopped all three phases with the same result. Both worked beautifully...
The transformer certainly does make an awful noise and the primary current is higher than expected. I don't know where a DC component would be coming from as it is a 3 phase system.
Hello
We are wanting to start a subsea electric motor through 3000m of cable with a softstart. This is a marine application so it is ungrounded. The boost transformer (Delta to ungrounded wye) 460:3000 is after the softstart.
Is there a rule of thumb for sizing a reactor that will counter...
