The 24 VDC coil draws 4 W closing and holding, so the control transformer sizing is straightforward — no inrush spike beyond the holding power.
Rated operational current at 24 V is 10 A; at 230 V it's also 10 A, but at 400 V it drops to 3 A, and at 690 V it's 1 A. The 10 A rating at 24 V and 230 V covers most control-circuit loads — relay coils, pilot lights, PLC inputs — while the 3 A at 400 V and 1 A at 690 V handle switching of small contactor coils or valve solenoids in higher-voltage panels.