The range of the DRH series electric wire rope hoists has been developed in:
4 basic sizes:
DRH 1-2-3-4, to lift from 800 to 50.000 kg, including 1020 standard executions, in the FEM service group (ISO): 1Bm (M3), 1Am (M4) - 2M (M5) - 3M (M6).
1 lifting speed:
made with a 4 pole motor: 4 or 6 m/min for 4 rope falls hoists; 8 or 12 m/min for 2 rope falls hoists; 2,7 m/min for 6 rope falls hoists; 2 m/min for 8 rope falls hosts.
2 lifting speeds:
made with a 4/12 pole motor, speeds are: 4/1,3 or 6/2 m/min for 4 rope falls hoists; 8/2,6 or 12/4 m/min for 2 rope falls hoists; 2,7/0,9 m/min for 6 rope falls hoists; 2/0,7 m/min for 8 rope falls hosts.
3 l ifting speeds:
made with 4/12 pole motors the micro speed is obtained by the application of a frequency device on the 12 pole winding.
5 standard version of drum:
short (C), normal (N), long (L) and extra long (X1) and (X2), for hook runs from 4 to 58 m.