Scope of Supply of 11Kv Induction motor. The motor is being procured for cooling water pump. The scope of supply of motor is as given below:

Transcription

1 Scope of Supply of 11Kv Induction motor Annexure Z The motor is being procured for cooling water pump. The scope of supply of motor is as given below: 1. Design, manufacture, supply and testing of Energy efficient Induction Motor- TEFC, Fan cooled, IP-55, 1300KW, 11KV, 50 Hz, 600 r.p.m., Frame size equivalent to ET 630/2240J as spare of existing motor rated 1200 KW, 11KV, 593 rpm, M/C No /1, Frame Size ET 630/2240J, make Parsonks p.u.k; It shall be suitable for one to one replacement in all respect i.e. motor terminal box, coupling size & type with existing foundations. Its testing, installation & commissioning shall be done by N F L at site under supervision of the party representative. a) Technical specification of motor enclosed as Annexure 1 b) Specification sheet of motor enclosed as Annexure 3 c) The following details of pump are enclosed: i) Specification sheet for centrifugal pump ii) Technical particulars of existing 1200KW(MP1801C) induction motor iii) Dimensional drawing of existing 1200 KW (MP1801C) motor The vendor shall go through all the above documents and shall fill the details or mention their comments in Annexure 3 and shall duly fill the data sheet of Motor, enclosed as Annexure Two years operation and maintenance spares: 1set of DE & NDE bearings, Grease cups for inner & outer for DE & NDE side (1 set), RTD each type, Terminal box with insulator & studs and a cooling fan) shall be supplied by the party along with the motor. Party shall submit item wise rates of desired recommended spares. 3. DEVIATIONS: Deviations if any from the enclosed specifications; shall be clearly indicated in a separate sheet with specific reasoning. 4. TECHNICAL LITERATURE: Complete set of technical literature alongwith Schematic drawing, Dimensional drawing etc shall be submitted with the offer. 5. INSPECTION: Inspection of the motor before dispatch as detailed in Annexure-5. shall be got done by NFL at party works. 6. GURANTEE: The motor shall be guaranteed for 18 months from date of dispatch or 12 months from the date of commissioning in respect of material, workmanship & performance. 7. The Party shall visit the site with prior approval for actual dimensions of motors, Load requirement, Foundation details, base plate details for both the existing motors as one to one replacement of the existing motor foundations. 1

2 1.00 SCOPE TECHNICAL SPECIFICATIONS OF MOTOR ANNEXURE This standard covers the technical requirements of design, manufacture, testing at works, and delivery in well-packed condition of medium voltage and high voltage induction motor This standard shall be read in conjunction with relevant specification sheets (SS) and other relevant references as specified therein STANDARD TO BE FOLLOWED 2.01 The design, manufacture and testing of the equipment covered by this standard shall comply with the latest issue of IS-325/IEC and other relevant Indian Standards or IEC unless otherwise specified The design and operational features of the equipment offered shall also comply with the provisions of latest issue of the Indian Electricity Rules. The supplier shall, whenever necessary, make suitable modification in the equipment, to comply with the above mentioned Rules Wherever any requirement laid down in this standard differs from those in Indian Standard Specifications, the requirement specified here in shall prevail SERVICE CONDITIONS 3.01 Ambient Conditions The ambient conditions shall be as indicated in the specification sheet System Details The details of power system to which the motor will be connected shall be as indicated in the specification sheet The motor shall be suitable for connection to a power system where transient disturbance is very likely to occur. During the transient disturbances, voltage of the system may completely disappear and return in a short time with the motor still running and connected. Under this condition, the return of voltage may occur at such an instant that the induced e.m.f. in the motor is in phase opposition applied voltage giving rise to current surges, which may reach a value equal to 2 times the starting current and also cause transient torque of large magnitudes GENERAL DESIGN FEATURES 4.01 Enclosure The enclosure of motor, for motor and outdoor services shall be IP-55 respectively as per IS- 4691, unless otherwise specified Motor for outdoor shall be provided with special seals for the enclosure, joints bearing housing, terminal boxes etc. so that no, extra protective covering for ingress of water is required All external hardware shall be zinc passivized or cadmium plated or stainless steel The enclosure shall be provided with threaded metallic plug to permit drainage of condensed water from the inside Cooling All motor, shall be totally enclosed, fan cooled conforming to IC-0141/IC611 as per IS unless otherwise specified In case of CACA construction, the same shall be conforming to IC-0161/IC611 as per IS

3 wherever service conditions indicated in the specification sheet are such that corrosive agents are present in the surroundings, the following materials of construction for cooling tubes shall be adopted, unless otherwise specified. For CACA motor Aluminum tubes having minimum thickness of 1.0 mm The cooling fans shall be suitable for bi-directional rotation of motor. They shall be fastened to the motor shaft by means of compensating rings or will be balanced independent of the motor. Guide key or reference points shall be supplied to prevent wrong assembly. The cooling air shall be sucked from the non-driving end Direction of Rotation Motor shall be suitable for both directions of rotation. In case of any design limitation, the same shall be indicated in the offer In either case, a plate showing the direction of rotation corresponding to the phase terminal markings shall be fitted at the driving end shield of the motor Stator The stator laminations shall be made from suitable magnetic sheet iron varnished on both sides. Where ventilation is required, these shall be arranged in suitable packs, each pack being separated by spacers to form ventilating ducts for circulation of air The slot shall be open type with coils so arranged that the coils can be easily removed for inspection and repair Rotor The rotor shall be of squirrel cage construction, unless otherwise specified Larger-motor, the rotor bars and the end rings shall be of copper or copper alloy. The bars shall be firmly placed in slots to prevent vibration during start up/locked rotor condition. Conductor ends shall be securely fixed to the end rings using the latest brazing techniques. Retaining rings shall be provided for high-speed machines for the end rings. The rotor cage shall be designed for the required starting and duty cycles The rotor shall be dynamically balanced and shall rotate perfectly with no preferential stop points. The rotor shall be constructed such as to allow the removal or addition of material for balancing The rotor shaft shall be electrically and magnetically so balanced that the induced shaft voltage does not exceed 200 millivolt. Otherwise the bearing housing at non-driving end shall be insulated for 2 kv Windings and Insulation The windings, along with the stator, shall be tropicalized and shall be vacuum impregnated The motor coils shall be made out o insulated electrolytic grade copper conductor. Successive coils shall be connected by accessible joints, well brazed and finished smooth to prevent damage to insulation All motor shall be insulated with class F insulation however temperature rise shall be limited to B class with tropical and fungicidal treatments Wherever class F insulation is specified, the windings shall be easily replaceable type and the temperature rise shall not exceed that of class B insulation The windings shall be well brazed and capable of withstanding thermally and mechanically the transient disturbance specified under clause Lead-in wire between the "windings and the outside terminals shall be made through 3

4 bushings in H.V. motor The windings shall be star connected Bearings All motor shall be provided with bearings suitable for the application. The bearings must be guaranteed to ensure a smooth operation and a life not shorter than 30,000 hrs Where external thrusts are specified, the motor shall be fitted with special roller thrust bearings capable of withstanding the specified thrust. In such cases, the guaranteed life of the bearings shall not be less than 20,000 hours The bearing housing shall be effectively sealed against ingress of dust and water and creepage of lubricants along the shaft The bearing shall be suitable for both directions of rotation of the motor All motor shall be provided with on line grease lubrication arrangement for both DE and NDE side bearings. The arrangements shall be complete with grease nipple and drain plug located at convenient locations All oil lubricated bearings shall be fitted with oil level indicator and resistance temperature detector/dial type thermometer with alarm and trip contacts Self-cooled sleeve bearing system shall be preferred The manufacture shall specify the type of lubricant and the time interval of lubrication for the bearings of each motor The bearing temperature shall not exceed 90 deg C for grease-lubricated bearings and 70 deg C for oil lubricated bearings Wherever shaft end play has been specified, the bearing shall be capable of providing the specified end-play Induced voltage at the shaft end of the motor at no load shall not exceed 250 mv r.m. s. for roller and ball bearings and 400 mv r. m. s. for sleeve bearings. The non driving end bearing shall be insulated from the motor frame to avoid circulating current. The insulated bearing end shield or pedestal shall bear a prominent warning and manufacturer shall provide detailed drawings showing insulation arrangement TERMINAL BOX All the terminal boxes shall have identical, degree of protection as that of the motor The power terminal box shall be mounted on the left hand side of the motor as viewed from the coupling end The power and the neutral terminal boxes shall be as follows : For H. V. motor Phase segregated type capable of withstanding the system fault level for 0.25 Secs. or more The mounting arrangement of power and neutral side terminal boxes for HV motor shall be identical so that it shall be possible to interchange the boxes at site In case of H. V. motor, all the six leads of the motor shall be taken out three on one side and three on the other side to separate terminal boxes. However, neutral shorting link shall be provided on the neutral box for star connection The power terminal boxes shall have adequate clearances between the terminals and between the terminals and cable gland for proper termination of cables. Where more than 4

5 one cable is required to be terminated in parallel, the spacing in the box shall be adequate for easy termination Separate terminal boxes shall be provided for connection of power, star point, RTD Winding, RTD Bearing and space heater All terminal boxes shall be complete with compression type cables glands, and lugs/ connectors to receive the external cables where cross-linked polyethylene cables are specified, the terminal box shall be suitably designed for proper termination of such cables The cable lugs shall be of Aluminum for Aluminum cables and suitable for crimping The terminal box shall be provided with pressure relief flaps/devices for increase safety i.e. Ex e motors, non-sparking i.e. Ex n motors and safe area motors, as per manufacturer s standard. 5.0 PERFORMANCE 5.01 Starting The motor shall be capable of being started direct-on-line, unless otherwise specified The starting torque of each motor shall be higher than the initial resisting torque of the driven load throughout the starting period even at a feeding voltage of 85% of the rated voltage for normal purpose motor and 80% of the rated voltage for special purpose motor as indicated in the specification sheet The starting current shall not be greater than 6 times the rated current when the motor are started at full voltage including tolerances, unless otherwise specified The motor shall be suitable for the following starting cycle. a) With the motor at ambient temperature- 2 successive starts and 3rd start after 5 minutes. This sequence shall be repeated in the next hour. b) With the motor at steady state load temperature- One (1) immediate start and 2nd start after 5 minutes. The sequence at (a) above shall be repeated in the next hour Locked Rotor Condition The locked rotor withstand time (te) under hot condition at 110% of rated voltage shall be more than the starting time of the motor coupled to the load even at the lowest stipulated starting voltage by 2 Secs for motor, having starting time upto 10 Secs, and by 5 Secs for motor, having starting time more than 10 Sees For deciding the time te in all cases, the temperature of the insulated stator and rotor shall not exceed the value stipulated under clause No Running All motor shall be continuous maximum rated (S1 duty as per IS-325), unless otherwise specified The motor shall be capable of delivering their rated output without exceeding the specified temperature rise under the following system voltage and frequency variation conditions, unless otherwise specified. MV 5 HV Voltage ± 10% ± 10% Frequency ± 5% ± 5% Combined Variation ± 10% ± 10%

6 The motor shall be suitable for running at the rated load for 5 minutes duration at 80% voltage and for 1 Sec. duration at 70% voltage, without exceeding the specified temperature rise Temperature Rise The total temperature of the stator winding under full load running condition shall not exceed the values permissible for the specified insulation class. For increased safety motor, the total temperature shall be 10 C less than for normal motor In case of starting and locked rotor conditions stipulated under clause Nos and respectively, the maximum temperature in the rotor shall not exceed the following values. For squirrel cage rotor 300 C 6.00 COUPLING DETAILS 6.01 Unless otherwise specified, all motor shall be coupled to the driven equipment through flexible coupling Normally the coupling half for the motor shaft shall be supplied by the driven equipment supplier. The coupling half shall be keyed on the shaft with a tapered joint or shrunk with a straight joint. For this purpose, the motor manufacturer shall co-ordinate all details of the coupling system with the driven equipment manufacturer, wherever required Where, rigid coupling is specified, the motor shaft shall have the desired class of accuracy ACCESSORIES 7.01 Space heater. The motor shall be complete with the accessories as indicated in the specification sheet Space heaters rated for 240 V.A.C. shall be provided to keep the winding dry for all high and medium voltage motor, except for motor rated 30 KW and below which shall be suitable for space heating by connecting 24 V A.C. to any of the two motor winding terminals The location of the space heaters shall be such as to allow easy access for inspection, maintenance and replacement Name Plate The nameplates shall be of stainless steel with letters embossed on them The name plate shall contain all the relevant details as per IS325 and in addition shall indicate the following: i) The description and code no. of motor. ii ) iii ) iv) v ) vi ) Degree of protection of enclosure. Temperature rise of windings under running condition. Designation of bearings. Recommended type of lubricant and interval of lubrication. Direction of rotation Embedded temperature Detectors All high voltage motor shall be provided with 6 Nos. of evenly distributed embedded resistance temperature detectors for measurement of winding temperature. These shall be located in positions at which the highest temperatures are likely to occur. 6

7 In addition, the high voltage motor shall be provided with 1 No. RTD for hot air temperature measurement. 2 Nos. RTDs (1 on each side) for bearing temperature measurement of oil lubricated bearings. For grease lubricated bearings, RTDs shall be provided only where specified These RTDs shall be of platinum having 100-ohm resistance at 0 C and temperature coefficient as 3.850x The RTDs shall be 3 lead type having power frequency insulation level of 2KV The RTDs shall comply with the requirements laid down in IS Dial Type Thermometers In high voltage motor, the measurement of hot air and bearing temperature (of oil lubricated bearings) by dial type thermometers shall be provided where ever specified The arrangement shall consist of a dial type of mercury-in-steel thermometer so mounted that its stem is located in the maximum temperature region The thermometer shall have two potential free contacts for alarm and trip All contacts shall be rated for 2 Amps at 110VD.C For bearing temperature measurement, separate thermometers shall be provided for each bearing For grease lubricated bearings, temperature measurement an arrangement shall be provided only where specified VIBRATIONS: 8.01: The motor vibrations measured at the bearings must not exceed the limits specified in IS 4729 unless otherwise stipulated in the SS. 8.02: Provision shall be made to have direct access to NDE side and cover for taking vibrations with test probes. 9.00: NOISE The motor noise level shall not exceed 85 db measured at a distance of 1 meter from the motor PAINTING Enclosures of the motor and its accessories shall be painted with two coats of antirust paint and two coats of anti-corrosive paint after suitable pre-treatment Unless otherwise specified, the finishing shade shall be of light grey shade No. 631 as per IS TESTS AND INSPECTION All motor shall be routine tested as per relevant standards Additional tests, wherever specified, shall be carried out on one motor of each rating For high voltage motor of each rating, polarization index test shall also be carried out All the above-mentioned tests shall be carried out in the presence of purchaser's representative. The costs for the above tests, test certificates, etc. shall be borne by the Supplier In addition, the motor shall be subject to stage inspection at works and inspection at site for final acceptance These inspection shall, however, not absolve the vendor from their responsibility for making good any defects, which may be noticed subsequently PACKING The motor shall be properly packed to safeguard against weather conditions and handling during transit. 7

8 12.02 The shafts shall be properly clamped/supported Rust inhibiting agents shall be applied to fittings and sliding surfaces All flanges shall be closed with blanking plates to avoid entry of foreign materials The loose pieces of the motor/spare parts/instruments shall be separately wrapped in moisture resistant paper and marked with identification marks and nameplate of the corresponding motor The packing box/crate shall include a copy of installation operation and Maintenance manual DRAWINGS AND DOCUMENTS Drawings and documents as per attached Annexure-2 shall be supplied Soft Copies of all the Final documents shall also be provided on Floppies or CDs All drawings and documents shall have the following descriptions written boldly. Name of client Enquiry/order number. Motor Code No. and Description SPARES Item-wise unit prices of spare parts with recommended quantity shall be quoted alongwith motor as listed in the SS Any other spare parts not specified, but required shall also be quoted along with the offer All spare parts shall be identical to the parts used in the motor The minimum spares are supplied along with the motor DEVIATIONS Deviations, if any, from this standard shall be clearly indicated in the offer with reasoning Deviation, if any, from the data furnished in SS shall be indicated in the SS beside the data by encircling it DELIVERY SCHEDULE For supply portion of the Motor- 6 Months FOR SERVICE PORTION: Installation & Commissioning shall be in N F L scope under close supervision of party representative. NOTE: 1. The offered motor shall be suitable for our existing motors rated 1200 KW, 11KV, 593 rpm, M/C No /1, Frame Size ET 630/2240J, make Parsonks p.u.k 2. The motor shall be ready replacement of the existing motor in all respect i.e Motor GD2, Motor starting Torque, coupling, Motor Shaft diameter etc. 3. The Party shall visit the site with prior approval for actual dimensions of motors, Load requirement, Foundation details, coupling details, Shaft diameter and base plate details for both the existing motors as one to one replacement of the existing motor foundations. 4. Self-lubricated journal bearings are preferable. 8

9 Documents for Induction motor Sr. No. Document 1 Specifications Sheet and Technical Particulars, completely filled in No of copies with bid No of Copies as Final Document Dimensional Drawings 2 4+1R 3 Drawings and data for air/ water 4+1R heat exchangers, if necessary 4 Drawing and Data for oil system, 4 if necessary 5 Characteristic curves a) Thermal withstand curve 4+1R b) Load Vs IFL 4+1R c) Load Vs Efficiency 4+1R d) Load Vs power factor 4+1R e) Load Vs RPM 4+1R f) Voltage Vs withstand 4+1R time g) Starting Current Vs Time 4+1R 6 Connection diagram for RTDs, 4 thermometer etc. 7 Terminal Box Drawing Illustrative and Descriptive 2 4 catalogue 9 Catalogue of bought out 2 4 accessories 10 Spare parts list Installation, operation and 4 maintenance manual 12 Test certificates a) Routine test 4 b) Type test of similar motor 4 c) For enclosure 4 13 Guarantee Certificate 4 14 Foundation Details 2 4 R= Reproducible Soft Copies of all the Final documents shall also be provided on Floppies or CDs. Annexure-2 9

10 ANNEXURE-3 SPECIFICATION SHEET (SS) FOR HT INDUCTION MOTOR Sr No Details Required Confirmation/ remarks by Vendor 1 General 1.1 Description 11kV Induction Motor 1.2 Ref standards IS 325/IEC amended up to date& other relevant standards 2 Ambient Conditions 2.1 Ambient temperature 47 C 2.2 Relative Humidity 100% 2.3 Altitude above sea level <1000 mtr 2.4 Location Outdoor type (Open air installation in sun) 3 System Details 3.1 Rated Voltage volts ±10% 3.2 No of Phases Frequency in Hz 50 Hz +3%, - 5 % 3.4 Fault Level 500 MVA for 3 sec. 3.5 Grounding UE through NGR current limited to 1100 amperes at 11kV 3.6 Space Heater Shall be provided for 240 volts AC system with separate junction box. 3.7 Instrument Contact rating AC: 5A at 240V AC DC: 1A at 110V DC 4 Rating & Duty 4.1 Mechanical Rated Output 1300 kw 4.2 Speed in r.p.m. at the rated 600 rpm output 4.3 Frame Size ET 630/2240J, make Parsonks p.u.k and 1RQ1717-3, make BHEL( with base frame ) 4.3 Type of duty Continuous (S1) 4.4 Rotor type Squirrel cage 4.5 Method of starting Direct On Line with maximum starting current limited upto 6 times of FLC 4.6 Number of starts per hour Hot-2 Cold Switching interrupter Shall be suitable for switching operation with Vaccum Circuit Breaker (VCB) 5.0 Execution 5.1 Degree of Protection provided by enclosure CACA IPW-55, suitable for outdoor use 10

11 Sr No Details Required Confirmation/ remarks by Vendor 5.2 Rotation required Bi-directional 5.3 Class of Insulation F class with temperature rise limited to B class 5.4 Cooling Method Motor shall have shaft mounted cooling arrangement. 5.5 Stator Connection STAR 5.6 Direction of rotation as Anti clock wise viewed from the D.E. 5.7 Mounting Horizontal Foot mounting B3 6.0 Cabling Data 6.1 Power Cable Shall be suitable for mm 2 XLPE-A- PVC, FRLS Aluminum cable to be terminated through heat-shrinkable Raychem kits. 6.2 Heater Cable 1.1kV PVC-A-PVC 6.3 RTD Cable 12TX1.5 SQMM 6.4 Cable Gland Double Compression rolled Aluminum Cable Gland 7.0 Driven M/c Data 7.1 Type Cooling Water circulation Centrifugal Pump 7.2 Make Mather & Platt 7.3 Absorbed power - Rated Coupling Details enclosed 7.5 Torque-starting- max >80% 7.6 GD 2 at motor speed > Accessories 8.1 Terminal Box Terminal Box shall be located in the LHS as viewed from DE side. However Power & Star side T.Box shall be so designed shall be interchangeable. The motor shall have phase-segregated type Neutral Terminal Box. 8.2 Space Heater Required 8.3 Lifting Eye bolt Required 8.4 Drain Plug Required 8.5 Cable glands Required 8.6 Cable lugs Required 8.7 Monitoring Devices (without monitor) Shall be provided with RTD s to monitor 11

12 Sr No Details Required Confirmation/ remarks by Vendor bearing temperature, winding temperature and hot air temperature of the motor. Type of temperature detectors shall be PT100 dual core. All these points shall be brought to a separate junction box to be connected to a distant monitor. Additional local temperature gauges shall be provided to monitor DE/NDE bearing temperature and hot air temperature of the motor. 8.8 Earthing Terminals 2 Nos. on Body & 1 No inside in Terminal Box 8.9 Name Plate Required 8.10 Additional Name Plate Required 9.0 Spare Parts 9.1 Bearings 1 set for DE & NDE 9.2 Cooling Fan 1 nos 9.3 RTD of each type 2 nos 9.4 Terminal box with insulator 01 nos & studs 9.5 Two year recommended spares List may be provided by vendor 10.0 Painting 10.1 Type Anticorrosive epoxy (2 coats) paint resistant to cooling water, Urea Dust, Ammonia-cal water, Acidic Fumes etc Shade 631 of IS: 5 12

13 ANNEXURE-4 (2 Pages) Technical Particulars of Induction Motor (To be duly filled by the Vendor and returned back with the Offer) No Description To be filled by Vendor 1 General 1.1 Item 1.2 Rated Output 1.3 Rated Voltage 1.4 Make 1.5 Maker s Type 2 Electrical data 2.1 No of permissible starts with motor cold 2.2 No of permissible starts with motor hot 2.3 I start/ I rated at 100% Voltage 2.4 Torque- starting/ pull up/ pull out 2.5 GD 2 at motor speed 2.6 Starting time in secs with 100 % Voltage 2.7 Starting time in secs with 85 % Voltage 2.8 Safe stall time at Vr / 1.1Vr 2.9 Stator Thermal Time Constant 2.10 Temperature rise at Full load Winding/ Hot Air/ Bearings 2.11 Temperature rise of stator/ rotor after 3 starts from cold 2.12 Temperature rise of stator/ rotor after 2 starts from hot 2.13 Alarm setting by winding RTDs 2.14 Trip settings by Winding RTDs 2.15 Alarm setting of Hot air by RTD 2.16 Current at FL/ 0.85 FL 2.17 Efficiency at FL/ 0.85 FL 2.18 Speed at FL/ 0.85 FL 2.19 Power Factor at FL/ 0.85 FL/ start 2.20 Push pull Voltage with stand capacity 2.21 Maximum Voltage dip for 1 sec/ 10 sec/ 60 sec 2.22 Iron Losses (KW) 2.23 Copper Losses (KW) 2.24 Friction, Windage & Stray losses (KW) 2.25 Total guaranteed losses 2.26 Space Heater Rating 2.27 Suitable for Low voltage heating 3.0 Mechanical Data 3.1 Frame size/ Ref. Dimensional Drawing 13

14 ANNEXURE-4 (2 Pages) Technical Particulars of Induction Motor (To be duly filled by the Vendor and returned back with the Offer) No Description To be filled by Vendor 3.2 Total weight of motor 3.3 Weight of stator 3.4 Weight of rotor 3.5 Weight of cooler (if removable) 3.6 Heaviest Weight to be lifted 3.7 Rotor GD 2 in Kg/m Reaction at Supports for a) SC Condition b) Starting Condition c) Running Condition d) Push Pull condition 3.9 Permissible Vibration Limit 3.10 Maximum Noise Level 3.11 Suitable for outdoor Use 3.12 Suitable for Bi-directional rotation 3.13 Material of insulation 3.14 Treatment of Insulation 3.15 Winding Coils replaceable at site 3.16 Type and Material of fan 3.17 Material & Thickness of cooler tube 3.18 Bearing Type & Nos a) DE b) NDE 3.19 Lubrication type 3.20 Lubrication Specifications 3.21 On line lubrication 3.22 Permissible temperature of bearings a) Full load condition b) Alarm c) Trip 3.23 Interval of Lubrication a) Recharging b) Replacement 3.24 Quantity of Lubricant a) Recharging b) Replacement 3.25 Type & Rating of Main Cable box 3.26 No of cable glands in control cable box 14

15 INSPECTION AND TESTING Annexure-5 1. During manufacturing of motor, the motor shall be subject to inspection by NFL. The manufacturer shall provide all necessary information concerning the supply to NFL. 2. All the type, routine and other acceptance tests shall be witnessed by the Inspector. The manufacturer shall give prior notice of minimum 4 weeks to the NFL for witnessing the tests. 3. All the type tests, routine tests and acceptance tests shall be carried out at manufacturer s works. 4. All these tests shall be carried out under manufacturer s care and at his expense. 5. Tests certificates duly signed by the Owner s Inspector shall be a part of final Documentation. 6. The manufacturer shall submit all internal test records of the tests carried out by him on the bought-out items, motor sub-assembly and complete motor assembly to the NFL before offering the motor for final inspection and testing. 7. The party shall submit all the offered motor data as per our new load requirements. 8. Type tests shall be carried out on one motor of each rating and frame size. 9. The following type tests shall be carried out as per applicable Indian Standards and shall form part of acceptance testing a) Full load test and measurement of voltage, current, power & slip b) Measurement of starting torque, starting current, full load torque and pull out torque c) Measurement of efficiency and p.f. at 100%, 75% and 50% load d) Temperature rise test e) Momentary overload test f) Tan delta test g) Measurement of noise level h) Measurement of vibration Over speed test i) Measurement of radial & axial clearance between fan & stationary parts j) Measurement of radial air gap k) Measurement of resistance of space heater, RTDs & BTDs l) Polarization index test m) Measurement of surface temperature of frame & space heater 10. Routine tests shall be carried out on the motor. The manufacturer shall carry out routine tests as per applicable Indian Standards. Routine tests not limited to the following shall form part of acceptance testing a) General visual checks, name plate details, mounting, terminal box location and cable gland sizes. b) Measurement of shaft centre height dimensions c) Measurement of shaft centre height dimensions d) Measurement of clearances in the terminal box e) Verification of type of terminals ( for Ex e & Ex n motor) f) Verification of direction of rotation g) Verification of cooling system & lubrication system h) Measurement of winding resistance i) Insulation resistance test ( before & after high voltage test) j) High voltage test k) No load test and measurement of voltage, speed, current & power input l) Locked rotor test at reduced voltage and measurement of voltage, current & power input m) Reduced voltage starting & running n) Measurement of shaft voltages 15