Induction Motor.........3

DESEIN Sheet - 11x210MW RAYALASEEMA THERMAL POWER PROJECT

(UNIT # 5, PHASE – III)

STANDARD TECHNICAL SPECIFICATION : INDUCTION MOTORS

0.00 SCOPE

This specification is intended to cover design, manufacture, assembly and testing of AC Squirrel Cage Induction Motors for use in Thermal Power Plants and is supplement to the driven equipment specifications under which these motors are being procured for the project.

1.00 SITE CONDITIONS

1.01 Site conditions are covered in 'Project Data', contained in specification of the driven equipment.

1.02 Gases, Fumes & Dust Particles

1.02.01 General ................. Sulphur dioxide and/or trioxide fumes mildly present. Climate is tropical, conducive to fungus growth.

1.02.02 Dust Particles

.1 Outdoor locations …………………Heavily dusty with abrasive dust and coal particles of size five (5) to hundred (100) microns present in atmosphere in large quantity.

.2 Indoor Locations.

.21 Millbay & coal conveyors ……………………. As for outdoor as per clause 1.02.02.1 above.

.22 Other locations ……………… Lightly dusty with abrasive dust and coal particles of size five (5) to twenty (20) microns present in atmosphere.

1.02.03 Special Fumes

.1 Water treatment plant and acid cleaning room ……….. Acid and alkali fuses present.

.2 Fuel oil pumping areas & Hydrogen generation plant ………….. Explosive fuses (flameproof motors required).

2.00 LOCATION OF MOTOR ..................................... As required

3.00 SPECIFICATIONS & STANDARDS........................ Motors shall comply with the latest revisions of all relevant standards of BIS (IS-325, IS-900, IS-996, IS-1231, IS-1885, IS-2148, IS-2223, IS- 2253, IS-2254, IS-2848, IS-3202, IS-4029, IS-4691, IS-4722, IS- 4728, IS-4889, IS-6362, IS-7816, IS-8223, IS-8789 and IS:12615) except as modified herein or in driven equipment specification.

A D e v e l o p m e n t S e r v i c e f o r I n d u s t r i e s & U t i l i t i e s



Motors conforming to BS or IEC Publications, which ensure equivalent quality shall also be acceptable. Motors conforming to any other National Standards, which ensure equivalent quality, are also acceptable but in such cases, the Bidder shall clearly indicate the standards adopted and furnish two (2) copies of the English Translation of these standards alongwith the Bid. In case of any difference between IS Specification/International Standards (IEC;NEMA etc.), this motor specification prevails.

4.00 VOLTAGE (NOMINAL)

4.01 LT Motors

4.01.01 For motors below 200 W ..................... Two hundred forty (240) V Single phase or Four hundred fifteen (415) V 3 phase.

4.01.02 For motors 200 W to 180 KW .................. Four hundred fifteen (415) V.

4.02 HT Motors

4.02.01 For motors above 180 KW ................. Six point six (6.6) KV

4.03 All motors are to be designed for system grounding described in "System Particulars" under site information of the Driven Equipment Specification.

5.00 FREQUENCY (NOMINAL) ................. fifty (50) Hertz

6.00 NUMBER OF PHASES .......... Three (3) except for single phase 240 V motors

7.00 SPEED ................................ As required by the driven equipment

8.00 TYPE OF STARTING ............................ Direct on-line

9.00 DUTY

9.01 Continuous motor rating shall be atleast fifteen (15) percent above the load demand of driven equipment at design point.

9.02 Motor rating shall be such that it is not overloaded at any operating point of driven equipment from zero to full load.

9.03 The break-away torque, pull-up torque and pull-out torque of the motors shall be properly co-ordinated with the requirements of driven equipment to ensure smooth and rapid starting and steady operation. The torque-speed characteristics of motor super imposed thereon on driven equipment torque-speed characteristics at 100%, 90%, 80% shall be furnished.

9.04 Maximum torque shall not be less than 200% of full load torque.

9.05 All motors shall be designed to withstand hundred twenty (120) percent of rated speed without any mechanical damage for two (2) minutes.




9.06 Motors shall be designed to keep torsional and rotational natural frequencies of vibration of the motor and driven equipment atleast twenty five (25) percent above or below, preferably above the motor operating speed (to avoid resonance in vibration over the operating speed) range.

9.07 All motors shall be energy efficient type having high power factor. LT motors upto 37 KW shall have performances conforming to IS:12615. LT & HT motors rated above 37 KW shall have full load efficienty of 91% minimum and rated full load power factor of 0.81 minimum. The required power factor shall be achieved without using external capacitors.

10.00 SUPPLY VARIATIONS ...................... Motors shall be capable of running continuously at full load under following variations in power supply :

10.01 Voltage (percent of nominal voltage) .......... Plus minus (+) ten (10)

10.02 Frequency (percent of nominal frequency) ........ Plus minus (+) five (5)

10.03 Combined voltage & frequency (percent) .............. Ten (10) (sum of absolute percentage value of voltage and frequency variation)

11.00 ABNORMAL CONDITIONS CAPABILITY...................Motor shall have following capabilities as specified design ambient temperature:

11.01 The motors shall also be capable of running up again after voltage collapse to about 40% for approximate duration of 0.5 sec. Subsequent rise in voltage to 70% and further to 80% and 100%, the total duration not exceeding 20 sec.

11.02 Low Voltage Running .................... Motor shall be capable of running satisfactorily at seventy five (75) percent nominal voltage for five (5) minutes.

11.03 Momentary Low Voltage Withstanding ................. Motor, when running at full

load, shall not stall when voltage drops down to seventy (70) percent nominal voltage for one (1) minute.

12.00 STARTING CAPABILITY

12.01 Low Voltage Starting .......................... Motor shall be capable of starting and accelerating to full speed at full load (including loaded equipment eg mills and conveyors etc) at eighty (80) percent nominal voltage at motor terminals.

12.02 Cold Motor Starting ................... Under specified voltage variations two (2) starts in quick succession and third start five(5) minutes thereafter, all with full load (including loaded equipment eg mills and conveyors etc) of driven equipment. No additional start will be made till lapse of further thirty (30) minutes.

12.03 Hot Motor Starting ............... Under specified voltage variations, one (1) immediate and two (2) fifteen (15) minutes interval starts all with full load (including loaded equipment eg mills and conveyors etc) of driven equipment. No additional start will be made till lapse of further thirty (30) minutes.




12.04 Motor shall also be suitable for three (3) equally spread starts per hour when the motor is under normal service condition.

12.05 Break-away Starting Current .................. Breakaway starting current as percent of full load current for various motor ratings shall not exceed the values given below :

12.05.01 Motors upto 1000 KW .................... 600% subject to IS Tolerance of plus 20%.

12.05.02 Motors (above 1000 KW upto 2500 KW).............. 600%. Not subject to any positive tolerance

12.05.03 Motors above 2500 KW ................. 450% Not subject to any positive tolerance

13.00 SAFE STALL TIME

13.01 To avoid problem in selecting standard protective relays without using speed switches, safe stall time under hot conditions (corresponding to 110% nominal voltage at motor terminals) shall be more than the accelerating time (corresponding to 80% nominal voltage at motor terminals) by the following minimum values :

13.01.01 Three (3) seconds, where accelerating time (at 80% nominal voltage) does not exceed 20 seconds.

13.01.02 Five (5) seconds, where accelerating time (at 80% nominal voltage) exeeds 20 seconds.

13.01.03 At no stage, speed switch shall be provided to achieve the above requirements mentioned under Clause No.13.01.01 & 13.01.02 above.

14.00 CLASS OF INSULATION

14.01 LT Motors ..................................... Class F.

14.02 HT Motors ..................................... Class F Epoxy enriched insulation shall be provided for motors having possibility of oil/moisture ingress into windings from the lubricating system.

14.03 However temperature rise shall be restricted to limits corresponding to Class 'B' insulation for both HT & LT motors. The temperature under abnormal running conditions shall be limited to 5oC above class ‘B’ limits.

14.04 The value of the polarisation index for motors above 180kW should not be less than 2 when determined according to IS:7816.

15.00 TEMPERATURE RISE UNDER NORMAL CONDITIONS........... Temperature

rise over specified design ambient temperature when motor is running with full load at nominal supply voltage & frequency shall not exceed the values given below :




_______________________________________________________________________S.No. Specified Design Thermometer Method Resistance Method Ambient Temperature_______________________________________________________________________

15.01 50oC 60oC 70oC

15.02 46oC 65oC 75oC

15.03 40oC 70oC 80oC

16.00 BUS TRANSFER WITHSTAND CAPABILITY

Motors will be connected to an automatic bus transfer system and hence may be subjected to one hundred and fifty (150) percent of the nominal voltage during changeover of buses due to the vector difference between the residual voltage and incoming supply voltage and the duration of this condition may be one second. Motors shall be capable of withstanding the voltage and torque stresses developed under such conditions without damage. The manufacturer/vendor shall indicate the special precautions taken to meet the above requirements and confirm.

16.01 That about 5000 bus transfers, in life time of motor, shall not puncture its insulation.

16.02 That motor shall be capable of withstanding heavy inrush transient current caused by such bus transfers without damage.

16.03 That the motor windings shall be adequately braced to satisfactorily withstand mechanical stresses under these conditions.

16.04 The motor and driven equipment shafts shall be adequately sized to satisfactorily withstand transient torques under these conditions.

17.00 TYPE OF ENCLOSURE

17.01 Outdoor Motors ...................... IPW 55 (Totally enclosed weather protected)

17.02 Indoor Motors ....................... IP 55 (Totally enclosed)

17.03 IP-55 degree of protection shall be achieved without application of any compound, putty etc.

18.00 METHOD OF COOLING

18.01 Method of cooling shall be IC 411 (TEFC), IC 511 (TETV) or IC 611 (CACA)

18.02 Large capacity motors not available with above types of cooling may be accepted with IC 81 W for IC 91 W (CACW) cooling subject to the approval of the Owner.




19.00 TYPE OF MOUNTING ..................... As required for the driven equipment.

20.00 MAXIMUM MECHANICAL VIBRATIONS

20.01 For motors with shaft heights upto 355 mm; the limits of vibration severity shall be in accordance with Table-1 or Table-2 of IS:12075 (Normal Class).

20.02 For motors with shaft heights above 355 mm ; the limits of vibration severity shall be stated by the Manufacturer and shall be subject to agreement by the Owner..

20.03 Noise level

The noise level of motors shall not exceed 85 db (A) at 1.5 m from operating motor measured in accordance with IS:10265.

21.00 INSULATION

Insulation shall be treated, impregnated, coated and tropicalised to withstand site conditions as per Cl. 1.00 above. Entire motor assembly, after coils are placed in slots and connections made, shall be completely immersed in suitable insulating compound or varnish followed by baking. This would be repeated thrice.

Winding shall then be painted with epoxy paint to withstand heavily salt polluted atmospheric conditions.

22.00 DIRECTION OF ROTATION

22.01 As needed by driven equipment.

22.02 The 3 phase motor shall, however, be suitable for operation in both directions of rotation. A plate showing direction of rotation as determined by the phase sequence on the terminals marking shall be screwed at non-driving end of the body of the motor.

22.03 If, in the case of HT motors, fan is suitable for only one direction of rotation, the fan shall be so designed that with the slight modification work, it can be made suitable for other direction of rotation also. No extra material shall be required for doing above modification work.

23.00 BEARINGS

23.01 General .............. Greased ball, roller and/or sleeve bearing shall be rated for minimum standard life of 20,000 hours taking bearing and driven equipment loads into account. Loss of grease shall be scarce and it shall not creep along shaft into motor housing.

Bearing shall be effectively sealed against dust ingress and shall be pressure grease gun lubricated.




If the bearings are oil lubricated, a drain plug shall be provided for draining residual oil and oil level gauge shall be provided to show precisely oil level required under standstill and running conditions.

Unless otherwise approved, bearing lubricating system shall be such that no external forced oil or water is necessary to maintain required oil supply to keep bearing temperature within design limits.

For HT motors, the bearings shall be insulated wherever necessary to prevent damage to motor bearings from shaft current.

When pressure oiling is required for horizontal motors, bearings shall be sleeve type arranged for pressure oiling supplied from lubrication system of driven machine, with ring oiling for starting and emergency duty. Ring oiling system shall be adequate for starting and continuous operation of motor for at least half an hour, without pressure oiling system in operation. Oil sight flow gauges shall be provided to indicate oil flow through each bearing.

Lubricants shall be selected for prolonged storage and normal use of motors in tropical climate and shall contain corrosion and oxidation inhibitors. Greases shall have suitable bleeding characteristics to minimize setting. The selected lubricants shall be indiginously available.

Sleeve bearings for use with motors having flexible coupling with limited end play, shall have adequate axial end play to prevent transmission of thrust from driven equipment to motor bearings.

Bearings shall be of reputed make subject to the approval of the Owner/Consulting Engineer.

23.02 Large motors .................... Large motors shall preferably have spherically seated babitted, ring forced, feed lubricated, water cooled bearings. If anti-friction bearings are provided, these shall be roller bearings rated for a minimum standard life of 30000 hours taking all bearing and driven equipment loads into account.

24.00 SHAFT EXTENSION ............ Key slotted bare shaft extension of required length with key on driving end.

25.00 DRAIN HOLES ................... Two (2) drain holes with plugs, one (1) on either end of motor at the bottom most point.

26.00 LIFTING DEVICES ................. Motors shall be provided with eye bolts, lugs or other means to facilitate safe lifting.

27.00 DOWEL PINS........... It shall be possible to drill holes vertically inclined through motor feet or mounting flange for installing dowel pins after assembling motor and driven equipment, before despatch (for completed driving + driven equipment assembly) or at site after erection (for separate supplies of above equipment).




28.00 CENTERING SPIGOT................... Flange mounted motor shall have centering spigot to match driven equipment socket.

29.00 EASE OF MAINTENANCE............... Motor shall be so constructed that it can be deassembled and reassembled with ease.

30.00 NAMEPLATES................. Motor shall have nameplate(s) showing diagram of connections, all particulars as per IS:325 and following additional information :

In addition, an arrow block shall be screwed on to the body of motor on the non-driving end to indicate direction of rotation of motor.

30.01 Temperature rise under normal/abnormal conditions.

30.02 Type of bearing and recommended lubricants.

31.00 FINISH.................. Motor shall have glossy, light grey finish No. 631 as per IS:5 for withstanding site conditions as per Clause 1.00 above.

All sharp edges and scales shall be removed from the surface, which shall then be thoroughly degreased, derusted and given two (2) coats of primer and two (2) coats of finish paint. It is preferred that a phosphate coat is given to motor prior to application of primer coat. Motors for water treatment plant shall have Zinc Chromate base with acid resistant Epilex 4 paint.

32.00 TERMINAL BOXES

32.01 General ............................ Motors shall be provided with separate terminal boxes for main, space heaters, embedded temperature detectors, bearing temperature indicators and moisture detectors terminals. When it is not possible to provide LT motors with separate terminal box for space heater terminals, space heater terminals shall be adequately segregated from the main terminals in the single box. Terminal boxes shall be weatherproof and water-tight confirming to minimum IP-55 degree of protection with removable front cover for making connections. IP-55 degree of protection shall be achieved without application of compound. Space between and around terminals shall be adequate for easily connecting aluminium conductor cables. Terminal box arrangement shall be to the approval of the Owner/Consulting Engineer. All terminal boxes shall be suitable for proper termination of the type and tentative size of cables specified in Clause 33.00 below, however, exact size of cables shall be furnished by Owner during engineering stage.

The terminal boxes shall be complete with cable glands and termination accessories as required. Suitable non-magnetic material construction shall be adopted for terminal boxes where single core cables are to be terminated. All HT motors shall be provided with phase segregated terminal box.

Terminal bushings and clamps shall be non-absorbent, non- inflammable, insulated material for connecting with cable.




32.02 Main Terminal Box

32.02.01 LT Motors ........ Main terminal box shall be capable of being turned through 360 degrees in steps of 90 degrees.

32.02.02 HT Motors ........... Motor shall be provided with two (2) terminal boxes for stator terminals. One (1) terminal box shall be for phase terminals while other one for forming star connection. These should be interchangeable to facilitate cable routing.

Neutral terminal box for HT motors rated 1000 KW and above shall be suitable for mounting of three (3) Nos. wound/bar primary/ring type cast resin insulated current transformers for differential protection. These transformers shall be supplied and mounted in the motor terminal box. In addition to above, 3 Nos. of identical current transformers shall be supplied loose for mounting in the switchgear. Stator phase terminal box may either be phase segregated of standard terminal box suitable for both top and bottom entry of cables.(i.e. they should be capable of being turned through 180 Degrees). The terminal box shall be designed for termination of XLPE cables using heat shrinkable or push on type terminating Kit. Terminal leading shall be stud type or leading wire type.

32.02.03 Cable End Boxes.................Terminal Boxes shall be provided with cable end boxes and cable glands for cables of sizes as specified in Clause 33.00 below.

32.02.04 The terminal boxes shall be capable of withstanding at the terminals the system fault level (as indicated below) without rupture for a duration of atleast 0.25 seconds.

Min. fault level for HT Motors - 40 KAMin. fault level for LT Motors - 50 KA

32.02.05 Minimum clearance to be provided between phase to phase and phase to earth shall be as under ::

Voltage Rating of Motor Min. Phase to Phase & to Earth

Clearance

0.415 KV

3.3 KV

6.6 KV

11.0 KV

25 mm

65 mm

127 mm

140 mm

In case it is not possible to maintain these clearances the live parts shall be totally insulated from earth and other phases. Adequate clearance shall be provided for cable connections.

32.02.06 Terminal Accessories................Each terminal end shall be furnished with bimetallic washers, spring washers, nuts and crimp type aluminium (preferably tinned) lugs suitable for cables of sizes as specified in Clause 33.00 below.




33.00 TYPE AND SIZE OF CABLES

33.01 Space Heaters

33.01.01 For LT Motors: Two point five (2.5) mm2, two (2) core copper conductor PVC insulated, armoured and FRLS PVC sheathed heavy duty 650/1100 V grade cable to IS:1554 (Part-I).

33.01.02 For HT Motors: Six (6) mm2 two core aluminium conductor PVC insulated armoured and FRLS PVC sheathed heavy duty 650/1100V grade cable to IS:1554 (Part-I).

33.02 For Embedded Temperature Detectors two sets of six (6) Twisted triad 0.5 mm2 ATC copper conductor armoured, shielded cable, 650/1100 V Grade IS:1554 (Part-I). For bearing temperature, RTDS,two (2) sets of four (4) twisted triad 0.5 mm2, ATC copper conductor armoured shielded 650/1100 V Grade, IS:1554 (Part-I).

33.03 Bearing Temperature Indicators - For each indicator, 0.5 mm2 six (6) tarnished triad ATC copper conductor, PVC insulated, shielded armoured and FRLS PVC sheathed heavy duty 650/1100 V grade cable as per IS:1554 Part-I. Two (2) cables one (1) for each bearing temperature indicator.

33.04 For Moisture Detectors...................As for space heaters as per Clause 33.01.01 above.

33.06 For Main Terminals

33.06.01 LT Motors

.1 Three (3) core cables ……………….. Stranded aluminium conductor, XLPE insulated, colour coded, laid up, PVC sheathed, GI wire / strip armoured, FRLS PVC jacketed overall, 650 / 1100 V grade, heavy duty cables as per IS:1554 (Part-I).

.2 Single core cables …………………… Stranded aluminium conductor, XLPE insulated, hard drawn aluminium wire /.strip armoured FRLS PVC jacketed overall, 650 / 1100V grade, heavy duty cable as per IS:1554 (Part-I).

33.06.02 HT Motors

.1 Three (3) core cables …………………… stranded aluminium conductor, XLPE insulated, screened colour coded, laid up, PVC sheathed, GI wire/strip armoured FRLS PVC jacketed overall, 6.6 KV / 11 KV grade, heavy duty cables as per requirement for unearthed system as per IS:7098 (Part-II).

33.06.03 Power cable sizes are given in Sheet-15.




34.00 GROUNDING

34.01 General................... Two (2) grounding terminals one (1) on either side at the bottom suitable for connecting mild steel/GI flat/GI wire grounding conductor of size given in Sheet 246 shall be provided.

34.02 LT Motors....................At each earthing point, two (2) drilled and tapped holes with hexagonal head bolts, plain washers, spring washers and tinned lugs (for motors upto 5.5 KW) for size of conductor specified shall be provided.

34.03 HT Motors.....................Non-corrodible metallic grounding pad shall be welded or brazed at each earthing point. The size of grounding pad shall be 75x65x25 mm. Grounding pad shall have 40 mm apart two (2) drilled and tapped holes with hexagonal head bolts, plain washers and spring washers for size of conductor specified. In addition, one suitable earthing terminal shall be provided inside the stator phase terminal box for earthing metallic shield of XLPE cables.

35.00 EMBEDDED TEMPERATURE DETECTORS..................HT motor shall be provided with six (6) resistance temperature detectors (RTDs) embedded in stator winding at locations where high temperatures are expected. In addition one (1) RTD shall be provided in each bearing. The RTDs shall be 3 wire duplex platinum resistance type having a value of 100 ohms at 0 Deg.C

36.00 BEARINGS TEMPERATURE INDICATORS......... HT motors shall be provided with dial type two (2) bearing temperature indicators and will have two (2) sets of contacts, each set having 2 NO + 2 NC contacts rated for 5A at 240V AC and 0.5A at 220V DC. One set will be set to operate at lower value to give alarm and other set at a higher value to trip the motor.

37.00 SPACE HEATERS........Valve / Damper actuator motors; and Motors above 30 KW shall be provided with one (1) or two (2) space heaters suitable for 240V, 50 Hertz single phase AC supply and of adequate capacity to maintain motor internal temperature above dew point to prevent moisture condensation or deterioration of insulation during shut down. Heaters shall be mounted inside the motor in accessible locations so that their removal and replacement is simple.

The terminals of space heaters shall be brought out to a separate totally enclosed dust proof and weather proof terminal box.

38.00 HOT AIR TEMPERATURE DETECTORIf the motor is of CACA or CACW enclosure, a thermometer with alarm contracts in hot air circuit shall be provided.

39.00 WATER FLOW INDICATORIf the motor is of CACW enclosure a provision shall be made for visual indication of water flow and flow switch shall also be provided with alarm contacts. Thermometers shall be provided in water inlet and outlet circuits.




40.00 MOISTURE DETECTORS..................Motors with type of cooling 1C 81W or 1C 91 W shall be provided with moisture detectors for raising alarm in the event of water tube failure.

41.00 BED PLATE............Whenever motor is supplied with driven equipment the Supplier shall ensure that bed plate suits both motor and driven equipment and is adequately braced to keep vibration and misalignment within allowable limits to the approval of driven equipment and motor manufacturers.

42.00 OTHER ACCESSORIES......... Motor shall be supplied with all accessories and parts other than those, specified above which are necessary and/or useful for efficient operation.

43.00 TESTS

43.01 Type Tests ........... Type test certificate as per ISS of atleast one (1) motor of each type to establish that proposed motor conforms to the needs of this specification shall also be furnished with the Proposal. On award of contract, type tests on each type of motor shall also be conducted in presence of customer's representative and test certificates for the same shall be furnished for approval of customer.

43.02 Routine Tests......... Every motor shall be routine tested in presence of customer's representative as per IS:325 to the extent necessary to establish that it is identical to the type tested motor. Routine test certificates shall be furnished for approval.

Following tests shall also be conducted :

1. Overspeed test on all Motors2. Vibration test on HT Motors3. Polarisation Index test for HT Motors.4. Noise level test for each type of Motor5. Impulse test by 1.2/50 micro sec. on sample coil of HT motor stator

winding insulation as type test as per IEC.

Voltage Rating of Motor Impulse Test Voltage

3.3 KV 18 KV 6.6 KV 36 KV

11.0 KV 49 KV

6. Test for suitability of IP-55 as per IS:4691 as type test.

7. Temperature rise test on each type and rating.

8. Degree of protection test for second (2nd) numeral shall be conducted on all HT motors only.

9. Tan-Delta charging current and dielectric loss measurements on each phase of HT motor winding as routine test.




43.03 Witnessing of Tests...............The Owner reserves the right to depute his representative(s) to the Manufacturer's works to witness tests. To enable the Owner to depute his representative(s), the Supplier shall inform atleast thirty (30) days in advance about the readiness of motor for testing.

44.00 INFORMATION WITH PROPOSAL

44.01 Motor Data Sheet as per Schedule-III-C, Part-D of this specification.

44.02 Dimension Drawing/Foundation load details of motor and driven equipment.

44.03 Manufacturer's catalogue showing constructional details.

45.00 INFORMATION ON AWARD OF CONTRACT..................Within six (6) weeks from the date of award of the Contract, following shall be furnished :

45.01 Motor Data Sheet as per Schedule-III-D, Part-D of this specification.

45.02 Certified binding dimension drawing of motor complete with all accessories and fittings specifically showing terminal boxes, terminal spacings and sizes, earthing connections and sizes thereof, mounting details, lifting lugs, final foundation loads and dimensions with tolerances of centering spigot (where needed), shaft extension and key.

45.03 Following characteristics curves :

45.03.01 Torque-speed curves for motor at eighty (80), hundred (100) and hundred ten (110) percent rated voltage as well as torque-speed curve for driven equipment.

45.03.02 Current-speed curves at eight (80), hundred (100) and hundred ten (110) percent rated voltage

45.03.03 Current-time curves at eighty (80), hundred (100) and hundred ten (110) percent rated voltage.

45.03.04 Thermal withstand curves for hot and cold at eighty (80), hundred (100) and hundred ten (110) percent rated voltage.

45.03.05 Efficiency, power factor, current and speed versus power output curves.

45.03.06 Speed-time curves at eight (80), hundred (100) and hundred ten (110) percent rated voltage.

45.03.07 Negative phase sequence current withstand characteristics.

46.00 SPARE PARTS..................Proposal shall include unit prices for following spares and any other spare required for three (3) years normal operation and emergency needs of the motor :

46.01 One (1) set of bearings.46.02 One (1) sets of seals and gaskets if any for each motor.




SPECIFICATION FOR CABLES 1.00 CABLE SIZES

1.01 Size of main power cables for various motors shall be as follows :

1.01.01 415V three (3) phase motors___________________________________________________________

RATING CABLE SIZE ABOVE UPTO

___________________________________________________________

5.5 KW 3 core - 6 mm2

5.5 KW 11 KW 3 core - 10 mm2

11 KW 22 KW 3 core - 35 mm2

22 KW 37.5 KW 3 core - 70 mm2

37.5 KW 55 KW 3 core - 150 mm2

55 KW 75 KW 3 core - 300 mm2

75 KW 110 KW Two (2), 3 core - 150 mm2

110 KW 180 KW Two (2), 3 core - 300 mm2___________________________________________________________

1.01.02 For 6.6 KV three phase motors

-------------------------------------------------------------------------------------------------- RATING CABLE SIZE

ABOVE UPTO __________________________________________________________

181 KW 1000 KW 3 core - 240 mm2

1000 KW 2000 KW Two (2), 3 core - 240 mm2

2000 KW 4500 KW Two (2), 3 core - 300 mm2

4501 KW 10000 KW Nine (9), 1 core -1000 mm2__________________________________________________________

1.02 Cable size may be increased in some cases because of larger number of cables laid in under-ground ducts or because of voltage drop consideration. The Supplier shall supply motors with terminal box and cable accessories suitable for such higher size of cable at no extra cost.




2.00 GROUNDING CONDUCTOR SIZES

2.01 Size of grounding conductors for various motors shall be as follows :

___________________________________________________________

RATING CONDUCTOR SIZEABOVE UPTO___________________________________________________________

5.5 KW 4 SWG 5.5 KW 22 KW 25 mm x 4 mm

23 KW 55 KW 40 mm x 6 mm

56 KW 180 KW 50 mm x 8 mm

181 KW & ABOVE 75 mm x 10 mm

___________________________________________________________




MOTOR DATA SHEET(To be furnished alongwith the bid)

1.00 GENERAL

1.01 Application :

1.02 Quantity (Nos.) :

1.03 Make :

1.04 Frame Size :

1.05 Application Standards :

2.00 TYPE AND RATING

2.01 Type of Motor :

2.02 Service

i) Outdoor/indoor :

ii) Hazardous area classification :if any

2.03 Duty Cycle/Designation :

2.04 Rated Current Output

i) at 40 deg. ambient KW :

ii) at 50 deg. ambient KW :

2.05 Rated Speed RPM :

2.06 Rated Voltage & % Variation Volts :

2.07 Rated Frequency & % Variation Hz :

2.08 Full Load Current Amps :

2.09 No load current Amps :

2.10 Rated Power Factor :




2.11 Efficiency at rated voltage andfrequency :

i) Full load % :

ii) 3/4 load % :

iii) 1/2 load % :

3.00 PERFORMANCE

3.01 Method of starting :

3.02 Starting current at rated % of FLC :voltage

3.03 i) Starting torque at % of FLT :rated voltage

ii) Pull-out torque at % of FLT :rated voltage

3.04 Starting time at 80% 100% for fans motors and 90% 100% for mill motors :

i) With load Sec. :ii) Without load Sec. :

3.05 Safe stall time at 110% ratedvoltage :

i) Hot condition Sec. :

ii) Cold condition Sec. :

iii) Safe stall time at Hot(Sec.) :100% / 80% for fans & Cold(Sec.) :100% 90% for Mill Motors

3.06 Thermal Time Constant

i) Heating Min. :ii) Cooling Min. :

3.07 Starts

i) Equally spread/Hour Nos. :

ii) Successive cold Nos. :

iii) Succcessive hot Nos. :




3.08 Permissive running time at Min. :full load at minimum allow-able voltage

4.00 CONSTRUCTION

4.01 Degree of protection of enclosure :

4.02 Method of cooling :

4.03 Insulation class :

4.04 Temperature rise over 50 deg. Deg.C :ambient (by resistance)

4.05 Tropicalised Yes/No :

4.06 Mica with epoxy treatment Yes/No :for insulation

4.07 Winding connection :

4.08 Bearing

i) Make :

ii) Type DE/NDE :

iii) Recommended lubricant :

4.09 Motor Terminal Box

i) Type, phase segregated Yes/No :

ii) Location as seen from NDE :

iii) Fault withstand

a) Current KA :b) Time Sec. :

iv) Cable lugs and Glands Yes/No :furnished

v) Type and Range/size of cable :

5.0 ACCESSORIES

5.01 Space Heaters

(i) No. x Watt(Total) Watts :




(ii) Volts, Phase, Frequency :

(iii) Separate terminal box :

5.02 Winding Temperature Detector :

(i) Type :

(ii) Nos. and locations where provided :

(iii) Resistance at 0 deg. Ohm :

5.03 Bearing Temperature Indicator

(i) Type :

(ii) Nos. furnished :

5.04 Temperature Indicators:

(i) Type :

(ii) Nos. provided :

(iii) Locations :

5.05 Temperature Alarm Contacts

(i) Nos. provided :

(ii) Locations :

(iii) Contact Rating :

5.06 Flow Switch

(i) Nos. provided :

(ii) Locations :

(iii) Contact Ratings :

5.07 Current Transformer for DifferentialProtection

(i) Nos. provided :

(ii) Current Ratio :

(iii) Class of accuracy :




(iv) Dimensional Drawing :

5.08 Accessory Terminal Box

(i) Nos. provided :

(ii) Cable Glands/lugs furnished :

(iii) Type and Range/size of cable :

6.00 GROUNDING

6.01 Nos. of grounding pads provided

(i) On Motor Body :

(ii) On Terminal Box :

7.00 MISCELLANEOUS

7.01 Type of Mounting :

7.02 Overall Dimensions :

Length mm :

Breadth mm :

Height mm :

7.03 Moment of Inertia

(i) Driven Equipment Kg-sq.mt :

(ii) Rotor Kg-sq.mt :

(iii) Total Kg.sq.mt :

7.04 Weight

(i) Stator with winding Kg :

(ii) Rotor(with winding) Kg :

(iii) Total Kg :

(iv) Copper used in motor Kg :

(v) Base plate Kg :

(vi) Cooler Kg :




7.05 Cooling Water System(if provided)

(i) Water Temperature

(a) Inlet Deg.C. :

(b) Outlet Deg.C. :

(ii) Water pressure required Kg/sq.mm :

(iii) Air Temperature Deg.C. :

7.06 Direction of rotation viewed from NDE :

7.07 Method of coupling with driven equipment :

7.08 Sealing arrangement for bearing :

7.09 Details of painting :

7.10 Details of extra precautions taken :in motor design to meet 150% of normal voltage during high speed bus transfer

7.11 Special features if any :

7.12 Total guaranteed losses comprisingIron loss ,friction, windage and straylosses KW :

Break-up Iron loss KW :

Cu loss KW :

Friction windage & stray KW :losses

7.13 CT's for Differential protection :(For motors more than 1000KW)

(i) Type and Make :

(ii) Ratio & Accuracy class :

(iii) Class of insulation :

(iv) Rated voltage and frequency :

(v) Knee point voltage :

(vi) Applicable standards :




(vii) Dimensions of CT's :

(viii) Separate terminal box for CT's provided Yes/No :

(ix) If Yes ,Dimension of box :

7.14 Motor Bearings

(i) Permissible temperature rise deg.C. :

(ii) Design ambient temperatureassumed for above deg.C. :

(iii) Manufacturers reference no. ofcatalouges attached :

7.15 Motor bearing lubrication system whether :self lubricated orforced lubricated

7.16 Forced lubrication(if provided) Whether Yes/No :this is compatible with forced oil lubrication system of driven equipment.If so, furnish the details

(i) Type, Make & specification of oil :

(ii) Flow Rate Litres/Sec :

(iii) Pressure Kg/sq.mm :

(iv) Quantity of lube oil pumpsets provided for each motor No. :

(v) Location of control panel providedfor forced oil lubrication system for each motor :

(vi) Make, type & Name plate particularsof lube oil pumps and 415 volts3phase 50Hz motor :

(vii) Coolers-material :

(viii) Filters-Make & Type :

7.17 Quick disconnecting type terminal connection provided Yes/No :If provided then




(i) Make and Type :

(ii) Operating voltage :

(iii) Current Rating :

(iv) Oil filled/Air insulated :

(v) Reference No of manufacturers :catalogue attached

7.18 Stator core temperature detectors

(i) Make and Type :

(ii) No & Locations, Where :

(iii) Resistance at 0 deg.C. Ohm :

(iv) Reference literature attached Yes/No :

7.19 Permissible vibrations limits microns :

7.20 Vibration detectors provided Yes/No :

(i) Make and Type :

(ii) No. and Locations :

(iii) Reference catalogues attached Yes/No :

7.21 Vibration recorder provided Yes/No :




7.22 Magnetising current of motor at rayed voltage and frequency Amps :

7.23 Motor Reactances Ohms/phase :

(i) Sub transient reactance PU :

(ii) Transient reactance PU :

(iii) Steady state reactance PU :

7.24 Surge impedance per phase Ohms/phase :

7.25 Capacitance per phase to earth microfarads :

7.26 Winding resistance per phase at20 deg.C. Ohms :

7.27 Winding resistance between terminalsat 20 deg.C. :

7.28 Shaft orientationHorizontal/Vertical/Hollow Vertical :

7.29 Whether half coupling required Yes/No :

7.30 Whether bed plate required Yes/No :

7.31 Whether rails required Yes/No :

8.00 CHARACTERISTIC CURVES FOR MOTORATTACHED

(i) Speed Vs current at rated voltage Yes/No :

(ii) Speed Vs Torque at 110%,100%90%& 80% 0f rated voltage Yes/No :

(iii) Thermal withstand curve for hot and cold condition Yes/No :

(iv) Effeciency vs load Yes/No :

(v) P.F. Vs Load Yes/No :

(vi) Current Vs Time Yes/No :

(vii) Negative phase sequence Yes/No :




MOTOR DATA SHEET (DC)

1. GENERAL

i) Manufacturer :

ii) Equipment driven by Motor :

iii) Motor type :

iv) Country of origin :

2. DESIGN & PERFORMANCE

i) Frame size :

ii) Type of duty :

iii) Type of enclosure & type of : cooling

iv) Applicable standard to which : motor generally confirms

v) Type of mounting :

vi) Direction of rotation :

vii) KW rating at amb. temp. 50 deg C :

viii) Rated power supply voltage : With Rest Without Rest a) Armature circuit (v) :

b) Field (v) :

ix) Permissible voltage variation :

x) Minimum permissible starting : voltage

xi) Rated speed at rated voltage (RPM) :

xii) At rated voltage:

a) Full load current (A) :

b) No load current (A) :




xiii) Starting current (A) :

a) 100% voltage :

b) 85% voltage :

xiv) Starting time (with pump coupled) at :

a) 100% voltage (Sec) :

b) 85% voltage :

c) 80% voltage :

xv) Efficiency at rated voltage at :

a) 100% load :

b) 75% load :

c) 50% load :

xvi) Safe stall time (sec) at 110% rated voltage under :

a) Hot condition :

b) Cold condition :

xvii) Torque (Kg-m) :

a) Starting at min. permissible : voltage

b) Rated :

xviii) Fly wheel moment (GD2) of motor : (Kg-m)

3. CONSTRUCTIONAL FEATURES

i) Winding insulation :

a) Class & type :

b) Tropicalised (Yes/No.) :

c) Temp. rise over specified ambient : of 50 deg.

d) Method of temp. measurement :




ii) Degree of protection of terminal box for :

a) Main terminal box :

b) Space heaters (AUX. TB) :

iii) For main terminal box :

a) No. and type of cable gland :

b) Recommended cable size : (Armature/field)

c) Fault level (KA, sec) :

iv) Bearings :

a) Type (at DE/NDE) :

b) Make :

c) Recommended lubricant :

d) Life :

v) Weight of motor (Kg) :

vi) Field current at rated speed (A) :

vii) Field resistance (Ohm) at rated : speed at 30 deg C

viii) Field trimmer rating (Ohm) for : getting basic speed at 30 deg C.

ix) Resistance (Ohm) between terminals : at 30 deg C.

a) Armature :

b) Series winding :

c) Inter pole winding :

d) Shunt winding resistance :

x) 1st and 2nd critical speed :

xi) Overload that can be carried by : motor without changing overall




performance and period for which it is applicable

xii) Grounding device :

xiii) Space heater :

a) No. & location :

b) Volt & KW rating :

4. RESISTORS

i) Starting (external) resistance:

a) Type of resistor :

b) Ohmic, current & power :rating of resistor elements

c) Max. permissible temp. of : resistor elements

d) Connection diag. of resistor : elements

e) No. of startup stages/steps :

f) Resistance values of stages :

- at 30 deg C (Ohm) : - at running condition (Ohm) :

g) Expected temp. of resistor at: : running condition

h) Expected temp. of box at : running condition

i) Mounting/stacking of resistor :elements and G.A. of resistor box

j) Size, current rating of output terminals for :

- Starting resistor : - Field trimmer resistor :

k) No., type, size of cable gland for:

- startup resistor : - field trimmer resistor :




l) Field trimmer resistor :

a) Type : b) Ohmic, current & power rating : c) Permissible temp. :

5. Schematic connection diag. of motor with : starting resistor and field trimmer resistor.

6. CHARACTERISTIC CURVES

i) Starting current/time :

ii) Thermal withstand curve for :hot and cold condition

iii) Torque/speed :

iv) Load/Efficiency :

v) Speed/Time :




DC MOTORS SPECIFICATION

DC Motor will be of continuous duty type totally enclosed fan cooled (TEFC) having IP-54 degree of protection suitable for 220 V DC supply. DC Motor will be compound wound type having high torque characteristic suitable for Bi-directional rotation at rated speed and output. The general constructional features and details of DC Motor will be in line with details/particulars stipulated in the Specification for AC Squirrel Cage Induction Motors.

Contractor will furnish the data in respect of DC motors.


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Induction Motor.........3