I would also be sceptical of it meeting any EMC standards so an additional filter would be a very good idea. Be aware that, and VFD in general, can have quite high earth leakage so you might need to allow for that if RCD protection is in use.
RCD protection is not often needed for fixed supplied equipment, but in some locations or if fed via a plug and socket you might well need that.
For MCB you can usually buy them with different magnetic trip points, so:
- B-curve has 3-5 * In
- C-curve has 5-10 * In
- D-curve has 10-20 * In
In the absence of specific manufacturer's advice, if the
running current is 10A then typically you would be using the next MCB size up = 16A. Then a 16A B-curve has the "instant" trip at 3*16A minimum = 48A or more so might be adequate if that 30A really is the peak current, however, for more traditional motor starting you might be looking at C-curve or even D-curve.
But don't assume the D-curve is
always usable. For fault protection you need to make sure that it will trip in under 0.4s so the L-E loop impedance has to be sufficiently low for the chosen MCB so under minimum supply and hot cables you can meet the upper magnetic trip point to reach such a fast disconnect.
For example, a 16A D-curve MCB needs 20*16 = 320A to guarantee such a trip, allowing 0.95 * 230V for minimum supply and 80% for cables running hot then your maximum Zs is:
Zs = 0.8 * 0.95 * 230 / 320 = 0.54 ohms
That is not always possible if your supply Ze is in the higher range! (E.g. for TN-S that can be as high as 0.8 ohms and still "normal")
