tender for supply, installation and commissioning of vfd system on door delivery basis at hbl plant lauriya, west ch aran, bihar. , supply, installation, testing & commissioning of vfd system (250kw, 415v) with star-delta bypass with changeover arrangements as per below technical specifications and details:supply, installation, testing & commissioning of vfd system (250kw, 415v) with star-delta bypass with changeover arrangements as per below technical specifications and details and atatched tender document: a. technical specifications: i. vfd rating: 250kw, ii. input supply: 415v , 3 phase , 50hz iii. vfd rated current: 500a minimum iv. overload current for 60 seconds : 635a v. vfd type: 6 pulse vi. the vfd should be rated for minimum 500a at 50 deg c ambient temp. and after derating for 4 khz switching frequency for smooth operation of motor at entire speed range vii. vfd suitable for constant torque application v/f curve b. scope of supply as per attached tender document. c. star-delta bypass system with suitable power contactors as per attached tender document. d. lcs/remote station as per attached tender document. make of vfd - abb /siemens / l&t/ schneider electric/ amtech