We would like to introduce ourselves as a symtec in chennai an authorized system house of crompton greaves drives. crompton greaves ac drives-variable frequency drives ranges from 0. 25kw to 1000kw is suitable for operation with 3-phase, 230/480/690v, 50hz i/p supply. Cg heavy duty vector control drive modules with all standard protections, over current, over speed, over temperature etc. Inverter has standard drive features like adjustable speed ramp, remote/ local selection, inch, jog, forward/reverse functions etc.