Mechanism of topkit tower craneQTZ900B Hoisting 150LVF125 m/ min 23 46 11.5 23 m 25 12.5 50 25 trolley ing ( r/ min) 0-50 Slewing( r/ min) 0-0.55 Travelling( m/ min) 0-17 Power supply 380V/ 50HZ Necessary power supply 200KVA Mast section 4* 4* 5.78m