Eh, too bad that this salesperson is also the main support for Hitachi Italy; luckily he has some technically competent people at the branch. Anyway, I solved the mistery: that VFD has a pulse input for the shaft encoder but doesn't use it in PM mode. It's only used for stabilizing V/f speed...
AFAIK unless you are running with the simplest V/f control either and a really slow acceleration ramp you are not supposed to run a PM motor on a VFD without PM capability... and good luck when it goes out of sync for whatever reason
That's an IEC symbol for a breaker (EN617-7 07-13-05) which is actually *not* a disconnector device; the cross is the power switch designator, a proper disconnector has a "T" head. At 0.4kV usually breakers also have disconnecting function (i.e. disconnection under load) but that's not a rule...
At the moment we are running with standard induction motors, however we choose the VFD (Hitachi WJ-C1) since the vendor/FAE said "it will works with PM motors too" and we wanted to keep the option for that. However (in the small writing of the spec) they actually say
Of course, we are hoisting...
