supply of supply, installation and commissioning of variable voltage variable frequency drive suitable for existing panelsupply, installation and commissioning of variable voltage variable frequency drive suitable for existing panel,supply, installation and commissioning of variable voltage variable frequency drive suitable for existing panel. description: 3 ph, 400v, 37 kw (hd)/ 45 kw (nd) ga700 cipr-ga70d4089abma, 89 amp, max. output frequency- 590 hz, output frequency resolution- 0 .001 hz, protection design- ip20, ambient temperature -10 %u030ac to +50 %u030ac (without derating) up to +60 %u030ac with derating make: yaskawa, l&t, siemens, abb or equivalent. [ warranty period: 30 months after the date of delivery ] ] => limited