Providing VFD Retrofitting in Blue Star Chiller AC Plant of CSC, IIT Delhi

Amount

Supply, installation, retrofitting, testing and commissioning of HVAC Variable Speed Drive of capacity not less than 90 kW / 125 HP suitable for operation on 380 - 480 VAC for controlled operation of 110 TR Water Cooled Chiller AC (Blue Star make) bypassing and keeping standby mode of the existing star-delta drive (starter), complete package with necessary compatible MOBBUS Input / Output card, modification of software compatible to VSD with screw compressor, providing and making connections with communication cable, suitable size of tinned copper power cable (not less than 70 sqmm) of required length including other accessories like master control board (like MCS Magnum extension), control panel accessories including line reactor, transformer, electrical switchgears like DPMCB, control relay, power contactor, line choke, connecting copper cables as required with proper end terminations, solenoid valve, etc. complete as required. The complete package shall be housed in cubicle construction of size not less than 2000 mm x 900 mm x 900 mm fabricated out of 2 mm thick CRCA sheet with hinged lockable doors, dust and vermin proof powder coated of approved shade after 7 tank treatment process with proper forced ventilation arrangement for VF drive complete as required. Safety shutdowns with VSD shall include: a) VSD shutdown - requesting fault data b) VSD - stop contacts open c) VSD - 110% motor overload d) VSD - high phase A, B, C inverter heat-sink temperature e) VSD - high converter heat sink temperature The VSD starter will vary the compressor motor speed by controlling the frequency and voltage of electrical power to the motor. the adaptive capacity control logic shall automatically adjust motor speed and compressor pre-rotation vane position independently for maximum part-load efficiency by analysing information fed to it by sensors located throughout the chiller. The VSD shall restrict harmonic generation from VSD by providing Active Harmonic Filters as per IEEE 519. Drive shall be PWM (Pulse Width Modulation) type utilising IGBTs (Insulated Gate Bipolar Transistor) with a power factor of not less than 0.95 at all loads and speeds. [Suggested make of different accessories: VF Drive - Compatible with Blue Star Chiller (as recommended by OEM Blue Star as per global catalogue / practice), MCB, Contactors - Siemens / L&T / Schneider, Cable - Finolex / Polycab / Havells / Gloster etc.]

CASCADE (BID ID -3107778)