Ref : Electrical Machines Lab/IIT Palakkad Registrar i/c Date:

Transcription

1 भ रत य प र द य ग क स स थ न प लक क ड Indian Institute of Technology Palakkad अहगलआ एक क त क म पस, क ज़ ह प र Ahalia Integrated Campus, Kozhipara प लक क ड Palakkad द रभ षस ख य / Phone no: /590/586 ईम ल/ purchase@iitpkd.ac.in Prof. Job Kurian Ref : Electrical Machines Lab/IIT Palakkad Registrar i/c Date: Open Tender No: IITPKD/ELE/012/2017 Due Date: 3.30PM Dear Sir/Madam, On behalf of the Indian Institute of Technology, Temporary campus, Palakkad, Quotations are invited for Setting up of Electrical Machines Laboratory at Transit Campus, IIT Palakkad. The Specifications are given in the Annexure. Pre-bid meeting The pre-bid meeting is scheduled to be held on at AM in the conference Room, Academic Block, IIT Palakkad. Instructions to the Bidder (i) (ii) (iii) Preparation of Bids: - The tenders should be submitted under two-bid system (i.e.) Technical bid and Financial bid in separate envelopes. The technical bid should consist of all technical details along with commercial terms and conditions. No prices should be included in technical bid. Financial Bid should indicate item wise prices for the items mentioned in the technical bid. The technical and the financial bids should be put in separate cover and sealed. Both sealed covers should be put into a bigger cover. Technical bids must either be spiral bound / stapled together. No loose sheets will be accepted. All pages must be numbered. Delivery of the tender: - The tender shall be sent to the below-mentioned address either by post or by courier so as to reach this office before the due date and time specified in the Schedule. The offer/bid can also be dropped in the tender box on or before the due date and time specified in the schedule. The tender box is kept in the office of the Academic Block, IIT Palakkad, Ahalia Integrated Campus, Kozhipara, Palakkad Opening of the tender: - The offer/bids will be opened by a committee duly constituted for this purpose. The technical bids will be opened first and it will be examined by a technical committee which will decide the suitability of the bid as per our specifications and requirements. The bidders will be invited for opening of Technical bids. In respect of opening of financial bid, those bidders who are technically qualified only will be called for.

2 (iv) Prices: - The price should be mentioned separately for the Item A. Electrical machines, related instrumentation and accessories, B. Civil works for mounting of machines, C. Electrical wiring including proper earthling for machines D. Installation and commissioning of machines, related instrumentation and accessories defined in the technical specifications. All packing, delivery and other miscellaneous charges must be indicated separately for each item. The offer/bid should be exclusive of taxes and duties, which will be paid by the purchaser as applicable. However the percentage of tax & duties should be clearly indicated. The price should be quoted without custom duty and excise duty, since I.I.T. Palakkad is exempt from payment of excise duty, and the custom duty will be paid at concessional rate against duty exemption certificate. In case of import supply, the price should be quoted on EX-WORKS/CIP basis indicating the mode of shipment. (v) Agency Commission: - Agency commission, if any, will be paid to the Indian agents in Rupees on receipt of the equipment and after satisfactory installation. Agency Commission will not be paid in foreign currency under any circumstances. The details should be explicitly shown in Tender even in the case of Nil commission. The tenderer should indicate the percentage of agency commission to be paid to the Indian agent. The foreign Principal should indicate about the percentage of payment and it should be included in the originally quoted basic price, if any. (vi) (vii) Terms of Delivery: - The item should be supplied to our Institute as per Purchase order. In case of import supply, the item should be delivered at the cost of supplier to our institution. The installation and commissioning should be completed as specified in our important conditions. IIT Palakkad reserves the full right to accept / reject any tender at stage without assigning any reason. Yours sincerely, Registrar, IIT Palakkad

3 SCHEDULE Important Conditions: 1. The due date for the submission of the tender is at 3.30pm 2. The offers / bids should be submitted in two bids systems (i.e.) Technical bid and financial bid. The Technical bid should consist of all technical details / specifications only. The Financial bid should indicate item-wise price for each item and it should contain all Commercial Terms and Conditions including Taxes, transportation, packing & forwarding, installation, guarantee, payment terms, pricing terms etc. The Technical bid and financial bid should be put in separate covers and sealed. Both the sealed covers should be put in a bigger cover. The Open Tender for Setting up of Electrical Machines Laboratory in Transit Campus, at IIT Palakkad should be written on the left side of the Outer bigger cover and sealed. 3. EMD: - EMD should be at 2% (two percent) of the tender value quoted by the bidder. The EMD should be enclosed with the financial bid which will not be opened for Technical evaluation. Enclosing the EMD in the Technical bid will automatically disqualify the tenderer. EMD should be in the form of DD in favour of Indian Institute of Technology Palakkad and payable at Palakkad. The tender without EMD would be considered as UNSOLICITED and will be REJECTED. Photo/FAX copies of the Demand Draft/Banker s pay orders will not be accepted. No interest will be paid for the EMD and the EMD (Bid Security) will be refunded to the successful bidder on receipt of Performance Security. 4. Performance Security:- The successful bidder should submit Performance Security for an amount of 5% of the value of the contract/supply. The Performance Security may be furnished in the form of an Account Payee DD or FD Receipt from the commercial bank or Bank Guarantee from any nationalized bank of India. Only after submission of Performance Security, Purchase Order/Work Order will be released / L.C will be opened. Performance Security in the form of Bank Guarantee:- Incase, the successful bidder wishes to submit Performance Security in the form of Bank Guarantee, the Bank Guarantee should be routed through the Beneficiary Bank to the end user bank. Otherwise, the Indian Agent of the foreign vendor has to submit a Bank Guarantee from a Nationalized Bank of India. The Bank Guarantee should remain valid for a period of sixty days beyond the date of completion of all contractual obligations of the supplier including the warranty obligations.

4 5. If an Indian agent is involved, the following documents must be enclosed: Foreign principal s proforma invoice indicating the commission payable to the Indian Agent and nature of after-sales service to be rendered by the Indian Agent. Copy of the agency agreement with the foreign principal and the precise relationship between them and their mutual interest in the business. The enlistment of the Indian agent with Director General of Supplies & Disposals under the Compulsory Registration Scheme of Ministry of Finance. 6. The offer/bids should be sent only for a machine that is available in the market and supplied to a number of customers. A list of customers in India and abroad with details must accompany the quotations. Quotations for a prototype machine will not be accepted. 7. Original catalogue (not any photocopy) of the quoted model duly signed by the principals must accompany the quotation in the Technical bid. No prices should ever be included in the Technical bid. 8. Documentary proof for the claimed position and repetition accuracies must be obtained from the principals and submitted along with the relevant pages of the standards. 9. Compliance or Confirmation report with reference to the specifications and other terms & conditions should also be obtained from the principal. 10. Validity: Validity of Quotation not less than 90 days from the due date of tender. 11. Delivery Schedule:- The tenderer should indicate clearly the time required for delivery of the item. In case there is any deviation in the delivery schedule, liquidated damages clause will be enforced or penalty for the delayed supply period will be levied. 12. Risk Purchase Clause:- In the event of failure of supply of the item/equipment within the stipulated delivery schedule, the purchaser has all the right to purchase the item/equipment from other sources on the total risk of the supplier under risk purchase clause. 13. Payment:- No Advance payment will be made for Indigenous purchase. However 90% Payment against Delivery and 10% after installation are agreed to wherever the installation is involved. In case of import supplies the payment will be made only through 100% Letter of Credit i.e. (90% payment will be released against shipping documents and 10% after successful installation wherever the installation is being done). 14. Advance Payment:- No advance payment is generally admissible. In case of specific percentage of advance payment is required, the Foreign Vendor has to submit a Bank Guarantee equal to the amount of advance payment and it should be routed through the Beneficiary Bank to the end user Bank. Otherwise, the Indian Agent of the foreign vendor has to submit a Bank Guarantee through a Nationalized Bank of India.

5 15. On-site Installation: - The equipment or machinery has to be installed or commissioned by the successful bidder within 15 to 20 days from the date of receipt of the item at site of IIT Palakkad. 16. Warranty/Guarantee: - The offer should clearly specify the warranty or guarantee period for the machinery/equipment. Any extended warranty offered for the same has to be mentioned separately. (For more details please refer our Technical Specifications). 17. Late offer: - The offers received after the due date and time will not be considered. The Institute shall not be responsible for the late receipt of Tender on account of Postal, Courier or any other delay. 18. Acceptance and Rejection: - I.I.T. Palakkad has the right to accept the whole or any part of the Tender or portion of the quantity offered or rejects it in full without assigning any reason. 19. Do not quote the optional items or additional items unless otherwise mentioned in the Tender documents / Specifications. 20. Disputes and Jurisdiction: - Any legal disputes arising out of any breach of contract pertaining to this tender shall be settled in the court of competent jurisdiction located within the city of Palakkad in Kerala. 21. All Amendments, time extension, clarifications etc., will be uploaded on the website only and will not be published in newspapers. Bidders should regularly visit the above website to keep themselves updated. No extension in the bid due date/ time shall be considered on account of delay in receipt of any document by mail. Acknowledgement:- It is hereby acknowledged that the tenderer has gone through all the conditions mentioned above and agrees to abide by them. SIGNATURE OF TENDERER ALONG WITH SEAL OF THE COMPANY WITH DATE

6 Electrical Machines Laboratory for IIT Palakkad 1. Overview Executive summary: The laboratory will have 14 machine workdesks. Each electrical machine workdesk will have a Composite Machine Bench (CMB) consisting of four coupled electrical machines, a variable output isolation transformer, a load bank, associated instrumentation facilities, a laptop/computer and data acquisition (not in the scope of supply of vendor), a worktable, relevant switchgear and connection wires. Layout: The layout of the electrical machines laboratory is given in Appendix 1. The figure shows the dimensions and location of workdesks, machines bed (concrete bed) and various other details. All dimensions are in millimeters. Brief Technical specifications: Each CMB consists of one three-phase induction machine, two identical DC machines and one synchronous machine. The three-phase induction machine is placed at one end. It should be coupled through a love-joy coupling to the first DC machine (which has its shaft extended on both sides). The other end of this DC machine is coupled to the second DC machine (which also has its shaft extended on both sides) through an electromagnetic clutch. This second DC machine is further coupled to a synchronous machine through a love-joy coupling. The electromagnetic clutch should be powered from the workbench. In case of unavailability of the electromagnetic clutch, a mechanical coupling and decoupling mechanism could be developed by the vendor. Preference will be given to vendors who supply a configuration with an electromagnetic clutch. All these machines are to be mounted on a common CNC machined frame as depicted in Figure 1. This frame is to be fixed on a granite topped concrete bed. The overall assembly is to be restricted approximately to the dimensions shown in the Appendices. The machine set should also have two slotted discs mounted on the shaft for speed sensing for suitable pickup if an optical sensor is used, the casing must be IP 54 (not shown in Figure 1). The concrete bed and machine assembly should also have a facility to lock the rotor of the induction machine while doing full load tests. The maximum speed which the CMB set must withstand is 2500 rpm. Detailed technical specifications are listed below in Section 3. Technical compliance will be judged against each of the items listed in Section 3. Figure 1: Composite Machine Bench. Please see Appendices for further details. 2. Scope of the Tender 1

7 This tender deals with the following four main items: A. Supply of electrical machines, related instrumentation and accessories as per the plans provided in this document. B. Civil works i.e., preparing of machine bed and subsequent mounting of machines. C. Electrical wiring including proper earthing for machines. D. Installation and commissioning of machines, related instrumentation and accessories. 3. Detailed Technical Specifications A. Electrical machines, related instrumentation and accessories (1) Technical Specifications of Each Machine : i. DC Machines (a) Quantity 28 (b) Machine type (c) Power rating (d) Armature voltage (e) Field voltage (f) Type (g) Maximum field current (h) Number of poles 4 (i) Efficiency (j) Current (k) Speed (l) Modes of operation DC generator kw 220 VDC 220 VDC (Vendor can specify a different value if they so choose) Separately Excited 0.8 A At least 80% armature efficiency 6.5 A 1500 RPM Constant torque and constant power (m) DC machines supplied should have higher power rating than the AC machines. All winding terminals should be brought out to the panel, as per appendix 4. (n) Approved motor makers: SIEMENS, ABB, GENERAL ELECTRIC CO, BALDOR, RELIANCE, KIRLOSKAR ELECTRIC CO, INTEGRATED ELECTRIC CO, TERCO, CROMPTON GREAVES, DELORENZO ii. Synchronous Machines (a) Quantity 14 (b) Machine type (c) Power rating (d) Voltage AC KVA, 0.8 pf lag V, star connected 2

8 (e) Type (f) Field current Salient Pole/cylindrical rotor. Note that we wish to have seven machines of salient pole type and seven machines having a cylindrical rotor. 0.8 A at 0.8 pf lag (g) Efficiency At least 80% (h) Frequency (i) Speed (j) Short Circuit current (k) Number of phases (l) Field Excitation Hz 1500 RPM Greater than 3 times full load current 3 phase 220 V, 1 A (m) Total harmonic distortion (THD) Less than 4% (n) All 6 terminals must be brought out to panel as per appendix 4. (o) Approved motor makers: SIEMENS, ABB, GENERAL ELECTRIC CO, BALDOR, RELIANCE, KIRLOSKAR ELECTRIC CO, INTEGRATED ELECTRIC CO, TERCO, CROMPTON GREAVES, DELORENZO iii. Induction Machines (a) Quantity 14 (b) Machine type (c) Connection type (d) Rotor type (e) Power rating (f) Speed (g) Stator Voltage (h) Number of Phases 3 (i) Number of poles 4 AC Star connected Squirrel cage kw RPM V (j) Full load slip in the range 4 to 6% (k) Efficiency (l) Power factor (m) Frequency (n) Loading type At least 80% at full load At least 0.8 at full load Hz Induction machine will be loaded with a DC Generator (o) All winding terminals should be brought out to the panel of the machine as per appendix 4. (p) The concrete bed and machine assembly should also have a facility to lock the rotor of the induction machine while doing full load tests. (p) Approved motor makers: SIEMENS, ABB, GENERAL ELECTRIC CO, BALDOR, RELIANCE, KIRLOSKAR ELECTRIC CO, INTEGRATED ELECTRIC CO, TERCO, 3

9 CROMPTON GREAVES, DELORENZO iv. 3-Phase Transformers Variable Voltage Isolation Transformers (a) Quantity 14 (b) Machine type (c) Power rating (d) Output voltage range (e) Input voltage range (f) Frequency (g) Phase AC 1.5 kva V 415 V 50 Hz 3 phases (h) Peak efficiency 95% (i) Regulation 4% (j) Connection type (k) Core material (l) Cooling (m) Enclosure (n) Insulation Star/star CRGO steel for high efficiency Natural air cooled IP23 class Class F with temperature rise limited to Class B (o) The transformer should be of variable output voltage (0-415 V 3-phase) isolation type. The secondary shall be wound over the primary with suitable insulation between them. The secondary output shall be tapped by means of a rolling brush arm. Brush contact should be of roller type. One set of spare brushes have to be provided by the vendor for each transformer. (q) Approved motor makers: SIEMENS, ABB, GENERAL ELECTRIC CO, BALDOR, RELIANCE, KIRLOSKAR ELECTRIC CO, INTEGRATED ELECTRIC CO, TERCO, CROMPTON GREAVES, DELORENZO (2) Technical specifications for Electrical Machines Accessories i. Electromagnetic clutch (a) Quantity 14 (b) Type Dry type (c) Speed 2500 rpm (max) (d) Torque 20 Nm (e) DC voltage 24V (f) Engaging Current 2 A (g) Cooling Natural Air Cooled (h) The clutch must be operated from the front panel using a key-operated switch. 4

10 (i) The electromagnetic clutch and lovejoy couplings must be covered with a protective safety shield (coupling guard). (j) In case of unavailability of the electromagnetic clutch, a mechanical coupling and decoupling mechanism could be developed by the vendor. However, preference will be given for vendors who supply a configuration with electromagnetic clutch. ii. Slotted disc for speed measurement with proximity sensor (a) Quantity 28 (b) Thickness 2 mm (c) No of Slots 120 (d) Outer Diameter 95 mm iii. Resistor load Bank (a) Quantity 14 (b) Element type (c) Power rating (d) Voltage (e) Number of steps in each phase 5 (f) Phase (g) Frequency (h) Terminations Non-inductively wound resistor 1.5 kw continuous duty 415 V 3 phases 50 Hz Banana socket, 10 A (i) Important that the load bank has to be balanced (i.e. the resistance is changed equally on all the phase.) The 5-position switch used for the load bank must switch all three phases at the same time. (3) Technical Specifications for Work Desk and Work Desk Instrumentation Refer to Appendix 2 and Appendix 3 for dimensions and details of the work-desk and work-desk instrumentation. i. Work Desk Quantity = 14 The top and front views of the work desk are given in Appendix 2. The structure of desk is steel square tubing. The work desk has a wooden table top and a wooden top shelf. The instrumentation cabinet is made of powder coated steel. Note the 60 o slanted structure of the bottom part of the instrumentation cabinet clearly shown in the side view. (a) Length 150 cm (b) Total height 180 cm 5

11 (c) Height of Table top 90 cm (d) Width 100 cm (e) Wooden table top and wooden top shelf must be made of rubberwood or double sided laminated plywood. Table top must be at least 0.75 inch thick, whereas top shelf must be at least 0.5 inch. (f) Powder coated steel tubing for work desk structure must have square cross section of at least 1 inch. Thickness must be 16 SWG or thicker. (g) Sheet for instrumentation cabinet must be powder coated with thickness of 16 SWG steel or thicker. ii. Voltage and Current Measurements Quantity 14x5= 70 Voltage sensor LEM LV per Composite Machine Bench Current sensor LEM LA-25P 5 per Composite Machine Bench (a) The vendor shall provide voltage measurement through a Hall Effect sensor, particularly LEM LV or equivalent which needs to be approved by the committee. Each sensor shall be equipped with suitable signal conditioning circuitry to provide an output limited to ±10 V. Five such voltage sensors shall be housed in one powder coated metal box, which in turn will be within the instrumentation cabinet. This box shall have terminals that provide input (required for sensing) to the hall sensors and output terminals to take output from the hall sensors. The outputs from all the five hall voltage sensors shall have a common ground. The box shall also have a power supply input terminal block accepting suitable power supply to be used for the output side circuitry of the hall sensors. (b) The vendor shall provide current measurement through a Hall Effect sensor, particularly LEM LA-25P or equivalent subjected to the approval of purchase committee. Each sensor shall be equipped with suitable signal conditioning circuitry to provide an output limited to ±10 V. Five such current sensors shall be housed in one powder coated metal box, which in turn will be within the instrumentation cabinet. This box shall have terminals that provide input (required for sensing) to the hall sensors and output terminals to take output from the hall sensors. The outputs from all the five hall current sensors shall have a common ground. The box shall also have a power supply input terminal block accepting suitable power supply to be used for the output side circuitry of the hall sensors. (c) Power supply to the two hall sensor boxes shall be provided through an isolated supply derived from 220 V, 50 Hz ac mains. (d) The measurement inputs and outputs from current and voltage boxes shall be terminated on the front panel. The measurement input points shall be terminated on banana plug sockets, two for each sensor. The banana sockets shall be rated for 10A. The measurement outputs shall be terminated on BNC connectors, one for each sensor. The inputs and outputs for each sensor shall be grouped together to allow easy identification, but spaced out properly to allow easy access for connection. (e) Two 3 ½ digit LED panel meters (F1 and F4 See Appendix 3. F# refers to items therein) shall be provided on the panel to measure the voltage sensor outputs. The meter shall work from the hall sensor outputs. There shall be a selection mechanism (F2 and F5) to allow selection of the hall sensor outputs to the 6

12 meter and display. The hall sensors together with the meter shall act as a system such that the meter reads the true rms value of the voltage. The meters shall accept the hall sensor signals through selector switches. One meter shall receive signals from three sensors, while the other meter shall receive signals from the other two sensors. (f) Two 3 ½ digit LED panel meters (F7 and F10) shall be provided on the panel to measure the current sensor outputs. The meter shall not have an independent current transducer, but will work from the hall sensor outputs. There shall be a selection mechanism (F9 and F11) to allow selection of the hall sensor outputs to the meter and display. The hall sensors together with the meter shall act as a system such that the meter reads the true rms value of the current in the power circuit. The meters shall accept the hall sensor signals through selector switches. One meter shall receive signals from three sensors, while the other meter shall receive signals from the other two sensors. (g) Offset adjustment facility for the hall sensors output have to be provided at a convenient point. iii. Power Measurement Quantity: 2x14 units for single-phase power and 2x14 units for three-phase power (a) The instrumentation cabinet housing the current and voltage transducers will also house two three-phase power transducers and two single-phase power transducers. These transducers must be from LEM. They shall be powered from the same source which will be used to power the voltage and current transducer. (b) The input to these power transducers and the outputs shall be terminated on the measurement area of the workbench (F15, F16, F19 and F20). The inputs shall be of banana socket type (10 A rating). The outputs, limited to ±10 V, shall be terminated on BNC terminations. (c) The above outputs shall also be routed to suitable digital LED panel meters (31 2 digit) so as to indicate the actual power. There shall be one meter for three-phase transducer outputs (F13) and one for singlephase (F17). Their inputs shall be selectable using a selector switch (one for three -phase F14, one for single-phase F18). iv. Speed Measurement Quantity: 2x14 units (a) Information from the two slotted discs mounted on the shaft of the CMB for speed sensing should be used to provide true rpm on a digital LED panel meter (31 2 digit) (F21) on the front panel. The panel meter shall directly accept pulses from the pickup and indicate speed. (b) A switch (F22) must be present to select the input from anyone of the two pickups. v. Details regarding Front Panel Terminals and Display: The F# numbers refer to the magenta numbers in appendix 3. Vendor has to provide 10% extra components (banana sockets, BNC terminals) listed in this subsection. In addition to that 2 spare switches (of each kind), 2 spare displays, 2 spare indicator lamps and 2 spare isolators should be provided. (a) Panel Terminals Item Quantity and Type 7

13 3-phase voltage transducer terminal (F3) 1-phase or DC voltage transducer terminal (F6) Data acquisition terminal (F23) 3-phase current transducer terminal (F9) 1-phase or DC current transducer terminal (F12) Terminals for 3-phase power transducers (F15 + F16) Terminals for 1-phase power transducers (F19 + F20) AC motor terminals (F24) DC machines terminals (F25 + F26) AC generator terminals (F27) Power supply Panel F35+F39+F43+F47 Unconnected power terminals (F48+F49+F50+F51+F52) 6 Banana Sockets + 3 BNC 4 Banana Sockets + 2 BNC 16 (Analog In) + 2 (Analog Out) BNC 6 Banana Sockets + 3 BNC 4 Banana Sockets + 2 BNC 18 Banana Sockets + 2 BNC 8 Banana Sockets + 2 BNC 6 Banana Sockets 4 Banana Sockets 8 Banana Sockets 12 Banana Sockets 33 Banana Sockets (b) Display Item Voltage display (F1) Voltage display (F4) Speed display (F21) Current display (F7) Current display (F10) 3-phase power display (F13) 1-phase power display (F17) Quantity and Type 1 and 3 ½ digit 1 and 3 ½ digit 1 and 3 ½ digit 1 and 3 ½ digit 1 and 3 ½ digit 1 and 3 ½ digit 1 and 3 ½ digit (c) Selection Switches Switch (F2) Switch (F5) Switch (F22) Switch (F8) Switch (F11) Item Description Selectable between 3 phases of voltage and on/off (display on F1) Selectable between 2*single phases of voltage and on/off (display on F4) Selectable between 2 slotted discs and on/off (Display on F21) Selectable between 3 phases of current and on/off (Display on F7) Selectable between 2*single phases of current and 8

14 on/off (Display on F10) Switch (F14) Switch (F18) Switch (F48) Switch (F49) Switch (F54) Selectable between two 3-phase power transducers and on/off (Display on F13) Selectable between two 1-phase power transducers and on/off (Display on F17) 1 Resistor load Bank selector switch (5 positions where all phases must be switched simultaneously) 1 3-phase change over switch Key operated switch for electromagnetic clutch (d) Other fixtures Item Number and Specifications Power Supply Indicator Lamps (F28) 4 3-phase supply indicator lamps (F34+F38) 6 DC supply indicator lamps (F42+F46) 2 AC Isolators (F32 + F36 + F50) 3 (415 VAC, 10 A) DC Isolators (F40+F44) 2 (220 VDC, 10 A) 5 A sockets (F31+F53) 4 (220 VAC, 5 A) AC circuit breaker (F29) 1 (3-phase) DC circuit breaker (F30) 1 3-phase AC Fuses (F33+F37+F51+F52) 4 DC Fuses (F41+F45) 2 vi. Front Panel Wiring Details: The F# numbers refer to the magenta numbers in appendix 3. F1 voltage display F2 switch F3 voltage transducer terminals F1 is connected to F3 through F2 and used for display of voltages The switches are connected to the output of first, second and third voltage transducer The red connectors (in) are connected to the voltage inputs of first voltage transducer. The yellow connectors (in) are connected to the voltage inputs of second voltage transducer. The black connectors (in) are connected to the voltage inputs of the third voltage transducer. F4 voltage display F5 switch F6 voltage transducer terminals The BNC (out) corresponding to each transducer is connected to the output of the transducer. F4 is connected to F6 through F5 The switches are connected to the output of first, second and third voltage transducer. The red connectors (in) are connected to the voltage inputs of first voltage transducer. The yellow connectors (in) are connected to the voltage inputs of second 9

15 F7 current display F8 switch F9 current transducer terminals voltage transducer. The BNC (out) corresponding to each transducer is connected to the output of the transducer. F7 is connected to F9 through F8 The switches are connected to the output of first, second and third current transducer. The red connectors (in) are connected to the current inputs of first current transducer. The yellow connectors (in) are connected to the current inputs of second current transducer. The black connectors (in) are connected to the current inputs of the third current transducer. F10 current display F11 switch F12 current transducer terminals The BNC (out) corresponding to each transducer is connected to the output of the transducer. F10 is connected to F12 through F11 The switches are connected to the output of two current transducer. The red connectors (in) are connected to the current inputs of first current transducer. The yellow connectors (in) are connected to the current inputs of second current transducer. F13 power display F13 is connected to the transducers F15 and F16 through the switch F14. F14 switch F15 and F16 3-phase power transducer terminals F14 (switch) is connected to the outputs of the 3-phase power transducers. The switch can be connected to the second output of one transducer or the other. The top row RYB (banana terminals) of F20 and F21 are connected to the voltage terminals of the 3-phase power transducers. The bottom two rows RYB (banana terminals) of F20 and F21 are connected to the current terminals of the 3-phase power transducers. The single BNC terminal of F20 and F21 are connected to output terminal of the transducer. F17 power display F17 is connected to the transducers F19 and F20 through the switch F18. F18 switch F19 and F20 1-phase power transducer terminals F21 speed display F22 switch F23 DAQ input and output terminals F24 AC motor terminals (see Appendix 4) F18 (switch) is connected to the outputs of the 1-phase power transducers. The switch can be connected to the second output of one transducer or the other. The top row R and B (banana terminals) are connected to the voltage terminals of the 1-phase power transducers. The bottom two rows R (banana terminals) are connected to the current terminals of the 1-phase transducers. The single BNC terminal of F19 and F20 are connected to output terminal of the transducer. F21 is connected to F22 Connected to the input from the speed sensors The BNC terminals are connected to the DAQ inputs. The red (Arm) terminals are connected to the ends of one armature coil The blue (Arm) terminals are connected to the ends of second armature coil The yellow (Arm) terminals are connected to the ends of third armature 10

16 F25 and F26 DC machine terminals (see Appendix 4) F27 AC generator terminals (see Appendix 4) F28 indicator lamps F29 AC 3-phase breaker F30 DC breaker F31 and F53 coil The red and black terminals (Arm) are connected to the ends of the armature The red and black terminals (Fld) are connected to the ends of the field The red (Arm) terminals are connected to the ends of one armature coil The blue (Arm) terminals are connected to the ends of second armature coil The yellow (Arm) terminals are connected to the ends of third armature coil The red and black (field) terminals are connected to the ends of the field coil These bulbs indicate that 3 phase supply mains as well as the DC main have been switched on. The AC breaker connects the 3 phase bus bar to isolator The DC breaker connects the DC bus bar to isolator The sockets are connected to single phase supplies F32 AC isolator The isolator is connected to fuse 33 F33 fuse F34 lamps F35 supply terminals The fuse connects the isolator to the supply terminals 3 phase supply indicator lamps The terminals to get 3 phase ac supply F36 AC isolator The isolator is connected to fuse 37 F37 fuse F38 lamps F39 supply terminals The fuse connects the isolator to the supply terminals 3 phase supply indicator lamps The terminals to get 3 phase ac supply F40 DC isolator The isolator is connected to fuse 41 F41 fuse F42 lamp F43 supply terminals The fuse connects the isolator to the supply terminals DC supply indicator lamps The terminals to get DC supply F44 DC isolator The isolator is connected to fuse 45 F45 fuse F46 lamp F47 supply terminals F48 load selector F49 change over switch F50 unconnected extra terminals and isolator F51 unconnected extra terminals and fuse F52 unconnected extra terminals and fuse The fuse connects the isolator to the supply terminals DC supply indicator lamps The terminals to get DC supply The select switch has 5 steps of change of resistance The lower and bottom terminals are connected to the output terminals of the load box The change over switch has two inputs terminals and one output terminal. By switching either of the inputs can be connected to either of the outputs The in terminals are connected to the out terminals through the isolator The in terminals are connected to the out terminals through the fuse The in terminals are connected to the out terminals through the fuse F54 Electromagnetic Key operated switch to operate the Electromagnetic clutch 11

17 switch vii. Cables BNC Banana The vendor has to provide 20 Nos. 1.5 m long BNC cables per workdesk for connecting BNC terminals. The vendor has to provide 20 Nos. of 2.5m long, 20 Nos. of 2.0 m long cables, 10 Nos. of 1m long cables and 10 Nos. of 0.5m long cables per bench for connecting banana terminals. All cables must be rated for 10A. B. Civil works for mounting of machines (1) IIT Palakkad will provide a partially finished concrete bed with dimensions 0.75m(width) x 2.95m (length) x 0.45m (height). Each machine bed will accommodate two composite machine benches ( 2 x 4 machines). (2) The bidder will have to take care of the following (but not necessarily limited to) civil works in order to mount the electrical machines : i. Finish the concrete machine bed to the required level of flatness and dimension ( 0.8m x 3m x 0.5m). Install a machine cut granite slab (at least 5cm thickness) on the concrete machine bed. ii. There should be possibility of a nut-bolt arrangement (with the bolt coming out vertically from the concrete bed, and the nut fixing the granite slab to the bed) for the granite slab. The motivation for this is to ensure that the granite slab does not come loose from the concrete bed. iii. The machines should be mounted on CNC machined rails to ensure perfect alignment. These rails should be mounted to the granite slab using anti-vibration mounts. C. Electrical wiring including proper earthing for machines (1) IIT Palakkad will provide an incomer of: i. 415V, 3 phase, 200A supply as shown in Appendix 1. ii. A 220V DC, 45 kw 4-quadrant supply as shown in Appendix 1. iii. Trenches in the floor as shown in Appendix 1. iv. Lighting and fans for the laboratory. (2) The Bidder will have to take care of all other electrical wiring requirements via a certified electrical contractor. Specifically (but not limited to) : i. The bidder must install an AC/DC distribution board near each dual-machine bed as shown in Appendix 1. ii. At each of these AC/DC distribution boards, the bidder must provide for the following (a) 6 x 415V AC 3-phase, 16A MCC feeders (b) 6 x 220V DC, 10A MCC feeders (c) 4 x 220V AC, 10A MCC feeders iii. Connections from the AC and DC incomers to the AC/DC distribution boards located near each machine bed must be made using XLPE insulated armoured copper cables sourced from Havells or Vgaurd of appropriate rating. iv. Connections from the machines to the instrumentation panels must be routed through a junction box mounted on the machine bed. These connections must use FRLSH wires / unarmoured cables from Finolex, Havells or Vgaurd. These connections must be housed within easily serviceable metal/plastic ductwork. v. The bidder must construct sufficient number of copper plate-earth based earth pits as per Indian 12

18 Standard IS Copper wire (thicker than 10SWG) must be run from the earth pits to an earthbus located on each machine bed via the floor trenches. Each of the machines and each of the instrumentation cabinets must be connected to this earth bus. D. Installation and commissioning of machines, related instrumentation and accessories (1) The bidder who meets all the conditions and is approved by the selection committee shall setup one complete and functional prototype unit in their own premises as per the specifications herein within three weeks of intimation. The vendor shall arrange for inspection of this prototype at their premises by an IITPKD team. (2) The IIT Palakkad team will inspect the setup for safety and fitness. Special importance will be given to the electromagnetic clutch and lovejoy coupling mechanisms for sturdiness and safety. (3) Any two (at random) of the following tests shall be done in the presence of the IITPKD team to verify the working of the overall setup. The necessary set up for experimentation and observations shall be in the scope of the vendor. The vendor must give the test reports of all the machines in the unit conforming to specifications. i. No-load, blocked-rotor and load tests on the induction machine. ii. DC motor speed-torque characteristics, DC generator characteristics, Hopkinson s test. iii. Synchronous machine OC/SC test, synchronization of the machine to ac grid by dark-lamp method, and determination of V-curves as generator and motor, determination of Xd and Xq of the machine. (4) On successful completion of these tests, the prototype shall be type-approved. The vendor shall, for every setup, conduct tests to satisfy themselves of proper operation and certify the completion. (5) Care must be taken that all electrical connections between the machines and the instrumentation cabinet, and all wiring within the instrumentation cabinet must be tagged on both ends with a label maker. (6) The vendor has to provide the CAD files for the electrical wiring and mechanical setups. The tags used in point (5) above must match the labels on the CAD files. (7) Final acceptance of all units after delivery, installation and commissioning at IIT Palakkad will be upon successful completion of the above mentioned tests (i, ii, iii) by IIT Palakkad staff in the IIT Palakkad laboratory and receipt of proper CAD files. (8) Two IIT Palakkad engineers will be trained by the vendor for a period of 5 days for maintenance of the lab. 13

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22 Junction Box on Machine Bed U1 U2 AC motor V1 V2 Front Panel Item 24 W1 W2 A1 DC machine1 A2 F1 F2 Front Panel Item 25 Wiring Diagram for Machines Appendix - 4 A1 DC machine2 A2 Front Panel Item 26 F1 F2 U1 U2 AC Generator V1 V2 Front Panel Item 27 W1 W2 F1 F2

23 Who can Participate? Only those bidders fulfilling the following criteria should respond to the tender. 1. Bidder should be either an Original Equipment Manufacturer (OEM) of Electrical Machines or should be a reputed system integrator working in the area of electrical machines or allied fields. 2. The bidder should be a company registered under the Companies Act, 1956/2013 OR a Limited Liability Partnership (LLP)/a registered partnership firm OR a soleproprietorship entity. Appropriate Registration incorporation certificate to be submitted. Bidder must have a registered office in Karnataka/Tamil Nadu/ Telangana/Andhra Pradesh, or Kerala. Certificate of registration for the offices to be provided. 3. Bidder must also have a service center in Karnataka/Tamil Nadu/ Telangana/Andhra Pradesh, or Kerala. Certificate of registration for the centers to be provided. 4. Bidder must be in existence in the business of electrical machines or allied fields for a minimum period of 5 previous financial years (before or since 01-April-2012). Documentary evidence of experience must be provided. 5. The bidder should have implemented orders of electrical machines or allied fields worth exceeding INR 90 lakhs during previous three financial years (April 1, 2014 March 31, 2017). Purchase orders and certificates of successful implementation must be included. Copies of financial statements or evidence of turnover must be furnished. 6. The bidder should have documentary evidence of having supplied and installed at least one composite machine setup with at least three machines (i.e three electrical machines mounted on a common shaft) at a Centrally Funded Technical Institution an (like IIT, NIT, IISc). Bidder must provide a certificate of satisfactory performance of the installed setup. Contact details of faculty-in-charge of installed setup must also be provided. 7. Compliance sheet for the specification & OEM Brochure has to be attached along with Technical bid. Vendor has to fill the compliance sheet and mention page number or reference number in OEM brochure. Unfilled / partial filled sheets lead to disqualification. 8. The electrical machines should be of industry grade machines from one of the following brands: SIEMENS, ABB, GENERAL ELECTRIC CO, BALDOR,

24 RELIANCE, KIRLOSKAR ELECTRIC CO, INTEGRATED ELECTRIC CO, TERCO, CROMPTON and GREAVES, DELORENZO 9. The bidder should ensure that the machines should be covered by warranty of at least 5 years and 3 years for the instrumentation. 10% spare quantity of switches, meters, transducers, BNC and banana connectors must be provided along with the supply of items listed in this tender.