tender for purchase of mill vfd panel for 450kw motor , mill vfd panel for 450 kw motor , motor duty class iv- accordingly vfd to be selected • vfd rating: 560 kw (suitable for constant torque) • input supply: 415v, 3phase, 50 hz • vfd rated current: 1035a minimum • vfd type: 6 pulse • the vfd should be rated for minimum 1035a at 50 deg c ambient temp. and after derating for 4 khz switching frequency for smooth operation of motor at entire speed range (vfd sizing/derating calculation to be provided to match this specification and motor overload class) • overload class-iv for mill application: 150% overload for 1 hour 200% overload for 120 sec scope of supply • ip-42 floor mount panel, ral 7035, bottom cable entry, (make: rita/bch/eldon/vfd oem) • lcd graphical hmi on panel door • input acb-1250a mdo type, 3 phase • multi function meter • external input/dc choke- 3% impedance for harmonic suppression • vfd output filter- lc filter/choke- minimum 3% impedance • ac vfd module withrs 485 modbus communication, ai- 3 nos, ao- 3 nos & relay output - 3 nos. • vfd start/stop/reset push button on panel door • vfd speed inc-dec push button on panel door • ryb/run/trip indication • control wiring should be from tin platted copper cable to avoid corrosion. (control function shall be suitable for mill application) • local/remote/dcs selector switch (one ai/2 ao/ 3 do/2 di for dcs operation) • galvanic isolators for all 3 analog input & outputs • auxiliary contractor- (relays are not acceptable) • back curved high speed cooling fan with mcb • control supply transformer with mcb • temperature scanner -8 window for mill motor • common mode filter for reduces motor bearing noise and bearing current, thereby increasing motor bearing life. • dol starter for motor cooling with mpcb • panel space heater with thermostat • panel light with door switch lcs/remote station • ip55 enclosure • start/stop push buttom, vfd run/ trip indication) & fwd/rev switch • rpm meter- 0 to 1500 rpm make: amtech, abb, delta & cg note: your organization is responsible for the installation, commission and operation of the drive for the crushing season 2026-27 , motor duty class iv- accordingly vfd to be selected • vfd rating: 630 kw (suitable for constant torque) • input supply: 415v, 3phase, 50 hz • vfd rated current: 1190a minimum • vfd type: 6 pulse (control= dtc & safety= sto) • the vfd should be rated for minimum 1190a at 50 deg c ambient temp. and after derating for 4 khz switching frequency for smooth operation of motor at entire speed range (vfd sizing/derating calculation to be provided to match this specification and motor overload class) • overload class-iv for mill application: 150% overload for 1 hour 200% overload for 120 sec scope of supply • ip-42 floor mount panel, ral 7035, bottom cable entry, (make: rita/bch/eldon/vfd oem) • lcd graphical hmi on panel door • input acb-1250a mdo type, 3 phase • multi function meter • external input/dc choke- 3% impedance for harmonic suppression • vfd output filter- lc filter/choke- minimum 3% impedance • ac vfd module withrs 485 modbus communication, ai- 3 nos, ao- 3 nos & relay output - 3 nos. • vfd start/stop/reset push button on panel door • vfd speed inc-dec push button on panel door • ryb/run/trip indication • control wiring should be from tin platted copper cable to avoid corrosion. (control function shall be suitable for mill application) • local/remote/dcs selector switch (one ai/2 ao/ 3 do/2 di for dcs operation) • galvanic isolators for all 3 analog input & outputs • auxiliary contractor- (relays are not acceptable) • back curved high speed cooling fan with mcb • control supply transformer with mcb • temperature scanner -8 window for mill motor • common mode filter for reduces motor bearing noise and bearing current, thereby increasing motor bearing life. • dol starter for motor cooling with mpcb • panel space heater with thermostat • panel light with door switch lcs/remote station • ip55 enclosure • start/stop push buttom, vfd run/ trip indication) & fwd/rev switch • rpm meter- 0 to 1500 rpm make: amtech, abb, delta & cg note: your organization is responsible for the installation, commission and operation of the drive for the crushing season 2026-27 , motor duty class iv-accordingly vfd to be selected • vfd rating: 630kw (suitable for constant torque) • input supply: 415v, 3 phase, 50 hz • vfd rated current: 1190a minimum • vfd type: 6 pulse • the vfd should be rated for minimum 1190a at 50 deg c ambient temp. and after derating for 4 khz switching frequency for smooth operation of motor at entire speed rang ( vfd sizing/derating calculation to be provided to match this specification and motor overload class) • overload class-iv for mill application: • 150% overload for 1 hour • 200% overload for 120 sec (control= dtc & safety= sto) make: amtech, abb, delta & cg , motor duty class iv-accordingly vfd to be selected • vfd rating: 560kw (suitable for constant torque) • input supply: 415v, 3 phase, 50 hz • vfd rated current: 1035a minimum • vfd type: 6 pulse • the vfd should be rated for minimum 1035a at 50 deg c ambient temp. and after derating for 4 khz switching frequency for smooth operation of motor at entire speed rang ( vfd sizing/derating calculation to be provided to match this specification and motor overload class) • overload class-iv for mill application: • 150% overload for 1 hour • 200% overload for 120 sec (control= dtc & safety= sto) make: amtech, abb, delta & cg