A quick check of the cable resistance values (Prysmain BS5467 data sheet) has R1 for 16mm as 1.15 mOhm/m and R2 as 3.1 mOhm/m, paralleling the conductors leads to R1+R2 of about 3.68 mOhm/m so for the 185m run around 0.68 Ohms.
For a 16A MCB that is usable to D-curve.
But for a 32A MCB that already (even before looking at the supply DB Zs) puts the supply MCB limit at a B-curve, and that might be too trip-happy on the machine's start up current.
So you might be looking at a 100mA delay RCD to meet sub-main disconnection times (unless you look at a 32A or 40A switched-fuse, etc)
For a 16A MCB that is usable to D-curve.
But for a 32A MCB that already (even before looking at the supply DB Zs) puts the supply MCB limit at a B-curve, and that might be too trip-happy on the machine's start up current.
So you might be looking at a 100mA delay RCD to meet sub-main disconnection times (unless you look at a 32A or 40A switched-fuse, etc)