Tamil Nadu Generation And Distribution Corporation Limited-TANGEDCO has published Tender For Regular And Breakdown Maintenance Works To Be Carried Out In Electrical Division And Mechanical Maintenance Works During The Year 2023-2024 At Bbgtps. Submission Date for this Tender is 26-06-2023. Electrical Maintenance Tenders in chennai Tamil Nadu. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | MRT - PREVENTIVE MAINTENANCE WORKS |
| 2 | Replacement / maintenance of worn out carbon brushes in Unit III/ Unit IVGenerator shaft Earthing & Rotor E/F sensing carbon brush. |
| 3 | Works in110KV Breakers /Generator Transformers/ Battery Chargers /Diode Voltage Regulator panel. |
| 4 | Works inStation Transformers. |
| 5 | Works in Station battery / Unit III & IV Generator & CO2 protection battery / Unit I,II,III, IV battery / CC battery / D.G.set battery. |
| 6 | Works inCT/ PT/ CVT/ Wave Trap/ LAS/ Isolators |
| 7 | Works in Earth Switch |
| 8 | Works onConnectors / Fittings in 110KV Bus . |
| 9 | Works in Station Battery DCDB Module |
| 10 | MRT - ROUTINE MAINTENANCE WORKS |
| 11 | Calibration of Protection relays (Generator / 11KV SWGR / 415VLT SWGR / Unit III & IV 415V MCC/ FWPH). |
| 12 | Calibration of Power Relays (Generator /415V LT SWGR) |
| 13 | Servicing of MCC modules and calibration of Meters. |
| 14 | Testing of station transformer / Generator transformer/ WTI/ OTI/ UAT/AC Exciter and permanent magnet generator/ D.G set alternator power circuit / Breaker contact resistance/ AVR panel/ LT &HTBreaker circuits. |
| 15 | Winding Resistance and IR value of Generator Transformers/IR value of11KV LT Bus duct/ IR value of Generator stator. |
| 16 | Checking of Diode wheel in Exciter for Unit I to IV / Testing of Switch yard interlock circuits. |
| 17 | Testing ofUnit I to IV Generator space heater and panel heater / Terminal tightness of 110KV SWYD equipment boxes. |
| 18 | Terminal tightness and cleaning of control panels (CCR/11KV SWGR /LT SWGR /SCR /FWPH/CVT) |
| 19 | Servicingof Station (52AS) & UAT (52AR) Breakers / Terminal tightness of change over circuit/ MCC modules/ GT protection panel/ GT Marshalling boxes. |
| 20 | Servicing of 415V LT & 11KV HT Breakers, and testing Auto/Manual circuits |
| 21 | Terminal tightness of RTCC Panel /OLTC panel / draw out type CT/PT of GAC / DG set control panel. |
| 22 | Cleaning of Cable Gallery trays etc. |
| 23 | Cleaning / Terminal tightness of AVR Panel of Unit I to IV. |
| 24 | Testing of IR value, BDV oil test, silica gel replacing works inGenerator Transformer/ Station transformer |
| 25 | Collecting & sending of oil samples from Generator Transformer & Station Transformer to R&D lab for DGAtest& BDV test |
| 26 | Generator Transformer OLTC gear box mechanism and Tap Position Indicator mechanism servicing work. |
| 27 | 110KV Breaker open/close timetesting works. |
| 28 | Calibration of pr.gauge/pr.switch/Meters |
| 29 | Generator Transformer Tan Delta test |
| 30 | Earth pit cleaning, tightening of earth contacts and resistance value measuring. |
| 31 | Conducting Load test on 125 Volt and 220 Volt Battery set. |
| 32 | MRT - BREAKDOWN ANDGENERAL WORKS |
| 33 | Checkingof control circuits and replacing the defective contactors in Unit I to IV MCC modules/ GT Marshalling box/ control panels/ 415V SWGR/ RTCC, OLTC panels/ SCR, AVR panels. |
| 34 | Checking of protection circuits and replacing the defective relays / Timers after testing in Unit I to IV panels/ GT Marshalling box/ 415V SWGR/ SCR, SCB and AVR panels/ Synchronising Trolley |
| 35 | Testing of control / Indication / Annunciation circuits and replacing the defective control switches/ push button/ Hooters/lamp holders in Unit I to IVMCC modules/ GT Marshalling box/ HT SWGR/ 415V SWGR/ RTCC / OLTC panels. |
| 36 | Testing and replacing the defective Annunciation bulbs / indicating bulbs in various panels of Unit I toIV MCC modules/ GT Marshalling box/ control panels/ 415V SWGR/ RTCCpanels. |
| 37 | Testing and replacing the defective AVR panel cards / Annunciation cards of Unit 1 to IV |
| 38 | Rectification of DC cable fault.(Unit I to IV/ 11 KV SWGR/ FWPH/ DG Set/ RTCC/OLTC / AVR Panels / 110 KV switch yard.) |
| 39 | Attending to defect in HT Breakers/ LT Breakers / FWPHbreaker / DG Set Starting Motor |
| 40 | Testing of 110 KV CT & PT/Generator Transformer. |
| 41 | Testing of LT CT & PT and control Transformer. |
| 42 | Testing of Unit 52AS and 52AR LT Breaker and itschange over circuits. |
| 43 | Replacementwork of Limit Switch/Pressure Switch /Pressure Gauge/Spring Charging Motor/Carbon Brush in spring chargingmotor. |
| 44 | Replacement workof defective trip coil/Closing coil/Control contactor of 110KV Breaker &Cooler fan/OTI/WTI/Bearing replacement in cooler fan of Generator Transformer/Topping up of SF6 gas. |
| 45 | Replacementwork of defective oil pump/OLTC motor in Gen.Transformer/OLTC gear box worn out bearing changing. |
| 46 | Replacement work of defective contactor /Relays/ timers and Oil line Valve leak attending works |
| 47 | Replacementwork of defective battery/Battery connector,relays,Timer,Thyristor,condenser/Choke/ Transformer/PCB/Meter/Switches in Battery charger. |
| 48 | Replacementwork of defective Moving contact/Fixed contact of isolator or Earth switch with spare one/Mechanism stud/Limit switch/Isolator motor/Contactor/Castle key/Interlocks in Isolator MOM box. |
| 49 | Toppingup of Transformer oil with filtering arrangements including rental and transporting charges of filter machine. |
| 50 | Replacementwork of defective ‘T’ clamps/ Breaker clamps/ P.G.clamp/ switch end clamp/CT clamp/PT clamp. |
| 51 | Replacement work of defectiveconductor inMain Buses &Strung buses. |
| 52 | Replacementwork of defective conductor interconnecting the CT, Isolator & Breakers. |
| 53 | Painting of MOM box/ marshalling box/ CT, PT, earth switch box and other panels. |
| 54 | Cable laying work. |
| 55 | 110KV CT / PT oil leak attending work by replacing the worn out ‘O’ rings , gaskets and topping up of transformer oil & Nitrogen gas |
| 56 | Handling of materials at site/stores of Weight above 150 Kg |
| 57 | Handling of materials at site/stores of Weight between 100 to 150 Kg |
| 58 | Handling of materials at site/stores of Weight upto 100 Kg |
| 59 | C & I - FREQUENTLY OPERATING WORKS |
| 60 | Works in Batteries and Battery Charger in C&I Control Panels |
| 61 | Works in Control Panel for CO2 Fire Fighting System in Unit I to IV. |
| 62 | Cleaning of all Field Instruments like Gauges, Switches, Indicators, Speed Pick-ups, Solenoid Valves, Scanners, Spark Plugs ,Vibration Sensors and Smoke Detectors in Unit I to IV and Auxiliaries. |
| 63 | Cleaning of Cards in Mark-IV of UnitI to IV. |
| 64 | Carrying out works in Mark- IV of Unit I to IV such as cleaning, checking and allied modules works |
| 65 | Terminal tightness checking in Junction Boxes and Modules, Ignition Transformers in Unit I to IV and auxiliaries. |
| 66 | Works in Intercom Instruments, Intercom Exchange Cards, Junction Boxes healthiness checking. |
| 67 | Works in Page & Party System in the plant includes Instruments, Junction Boxes healthiness checking and checking the healthiness of all lines. |
| 68 | Works in CCTV System in the plant includes Cameras, Junction Boxes healthiness checking and checking the healthiness of all lines, Displays & DVRs. |
| 69 | Carrying out works in field instruments such as Pressure gauges & Switches for any leakage of oil, air, water & fuel and checking readings for correctness and analysis if necessary and attending the defects noticed if any. |
| 70 | Cleaning, Checking the terminal tightness in Lighting Distribution boards and pillar boxes. |
| 71 | Cleaning, Checking the terminal tightness of street light pole junction boxes. |
| 72 | Cleaning, Checking terminal tightness in junction boxes ofSwitchyard tower light fittings and High mast tower lights. |
| 73 | Checking the healthiness of motor terminal blocks, terminal lugs, power fuses, power contactors and end bearing noise of Unit I to IV and Auxiliaries Motors and Modules. |
| 74 | Taking Energy Meter reading |
| 75 | Carrying out works in field instruments such as flow meters, level indicators & switches, Temperature gauges & switches for any leakage of oil, air, water & fuel and checking readings for correctness and analysis if necessary and attending the defects noticed if any. |
| 76 | C & I - RARELY OPERATING WORKS |
| 77 | Checking the healthiness of RTD’s for Generator Winding Temperatures & indicator in Unit I to IV and related panel. |
| 78 | Works in Control Panel in Inlet Air Filter of Unit I to IV and Auxiliaries Panels related to C&I Control panels. |
| 79 | Calibration of Pressure Gauges, Differential Pressure Gauges & Temperature Gauges of Units I to IV and Auxiliaries. |
| 80 | Calibration of Pressure Switches, Differential Pressure Switches, Temperature Switches, Transducers, Digital indicators of Units I to IV and Auxiliaries. |
| 81 | Testing of Flame Scanners, Spark Plugs, Level Switches, Limit Switches, Level indicators, Pick- ups, Vibration Sensor, Naphtha Sensors,Smoke Detectorsand Fire Detectors in Unit I to IV and Auxiliaries. |
| 82 | Testing of Solenoid Coil and Solenoid Valves, Air Diaphram Valves in Unit I to IV and Auxiliaries. System. |
| 83 | Loop checking the alarms in Mark-IV of Unit I to IV by simulating the necessary parameters. |
| 84 | Cleaning, Checking terminal tightness and maintenance works in Distribution transformerand Lighting transformer. |
| 85 | Lubrication of motors by applying grease, testing of IR value, DC resistance of motor windings, load current measurement, Base bolt tightness of Unit I to IV and Auxiliaries Motors. |
| 86 | Cleaning, checking of tightness, testing of IR value in LT Bus bars. |
| 87 | Cleaning of Tube light fitting provided in entire locations of BBGTPS |
| 88 | Checking Earthing connection in Motors, Transformers and Modules, etc. |
| 89 | C&I- BREAKDOWN/ GENERAL WORKS |
| 90 | Releasing of old control cable and telephone cable above 4-pair & laying of new cable in a trench/ by clamping / bydiggingthe earth in between unit I to IV and Auxiliary locations. |
| 91 | Releasing of old telephone and CCTV cable 4-pair and below, laying of new cable in trench / by clamping / by digging the earth in intercom system. |
| 92 | Replacement of Thermocouple in Unit I to IV. |
| 93 | Intercom Faultand CCTV fault attending work (including line and junction box faults rectification). |
| 94 | Page & Party Fault Attending work (line and junction box faults rectification). |
| 95 | Mark-IV Cards Replacement in Unit I to IV. |
| 96 | Impulse Line leak attending work by changing the ferrules and tightening in Unit I to IV and Auxiliaries. |
| 97 | Impulse Line re-tubing work in Unit I to IV and Auxiliaries. |
| 98 | Removing any Faulty C&I field instruments and calibrating / testing in Unit I to IV and Auxiliariesand Re-fixing the instruments in the system. |
| 99 | Releasing the batteries, Transporting it to battery shop, servicing, re-charging and bring back to site and re-fixing batteries for C&I Control panels. |
| 100 | Defect rectification in Control Panels related to Unit I to IV and Auxiliary location panels. |
| 101 | Defect rectification work in Mark-IV Panels of Unit I to IV. |
| 102 | Painting of Control Panels, junction boxes, modules in Unit I to IV and Auxiliary location motors and C&I field instruments. |
| 103 | Handling of Materials to the work spot up to 100 Kg |
| 104 | Handling of Materials to the work spot up from 100 Kg to 150 kg. |
| 105 | Releasing of Instruments during shut down or for Mechanicalwork and fixing the same after completion. |
| 106 | Testing of new materials /equipments. |
| 107 | Releasing the failed motor (i.e.) decoupling from the air duct / pump, etc. for bearing replacement / rewinding and re-fixing the healthy motor after bearing replacement / rewinding For 55 kW, 45 kW and 37 kW (AOP) capacity motors. |
| 108 | Releasing the failed motor (i.e.) decoupling from the air duct / pump, etc. for bearing replacement / rewinding and re-fixing the healthy motor after bearing replacement / rewinding. Unit III & IV 88TK motor (37 kW) and 8KW EOP motor (DC) of Unit I & II. |
| 109 | Releasing the failed motor (i.e.) decoupling from the air duct / pump, etc. for bearing replacement / rewinding and re-fixing the healthy motor after bearing replacement / rewinding. For 30 kW, 26 kW, 22 kW, 18.5 kW and 15 kW capacity motors. |
| 110 | Releasing the failed motor (i.e.) decoupling from the air duct / pump, etc. for bearing replacement / rewinding and re-fixing the healthy motor after bearing replacement / rewinding. For 11 kW, 10 kW, 9.3 kW, 8 kW, 7.5 kW, 5.5 kW, 5 kW, 3.7 kW and 2.2 kW capacity motors. |
| 111 | Releasing the failed motor (i.e.) decoupling from the air duct / pump, etc. for bearing replacement / rewinding and re-fixing the healthy motor after bearing replacement / rewinding. For 1.5 kW, 1.1 kW, 1 kW, 0.75 kW,0.55kW ,0.37 kW capacity motors. |
| 112 | LT cable fault |
| 113 | LT cable laying work: Removing, Re-laying in cable trench / by clamping / or by Digging 0.6 Meters on the earth - Power cable laying upto 25 sq.mm. |
| 114 | LT cable laying work: Removing, Re-laying in cable trench / by clamping / or by Digging 0.6 Meters on the earth - Power cable laying above 25 sq.mm. to 120 sq.mm. |
| 115 | Attending to the defect in Motors and modules (Power Circuit) of Unit I to IV and Auxiliary location motors. |
| 116 | Replacement of tube light bulb, choke, starter, MCB and attending to defects in Stabilizer, fan at various locations. |
| 117 | Rectification of Switch Yard tower lights, Unit I to IV Air craft warning lights, Flame proof fittings and Street light fittings. |
| 118 | New Wiring for Wall Mounted Tube Light, Fan points, plug points, street light fittings, etc. |
| 119 | Extension of Power supply for lighting, welding, drilling, grinding,etc. for other agency. |
| 120 | Replacingof worn out Earthing connection in Equipments / Motors. |
| 121 | Testing of New lighting materials, power contactors, etc. |
| 122 | Attending to the defect in Distribution Transformer and Lighting transformer. |
| 123 | MECHANICAL MAINTENANCE WORKS |
| 124 | Cleaning of Accessory compartments |
| 125 | Cleaning of Turbine compartment |
| 126 | Cleaning of Load Gear & Exciter Compartments |
| 127 | Cleaning works in GT auxiliaries |
| 128 | Cleaning the outer areas of GTs |
| 129 | Cleaning the outside surfaces of drain tanks |
| 130 | Turbine lube oil/Naphtha Lubricity additive top up |
| 131 | Lubrication in GT auxiliaries |
| 132 | Emptying the lube oil drain tank in units 1 / 2 |
| 133 | Emptying fuel from units 1 / 2 drain tanks and moving, filling up this fuel into unit-3 drain tank |
| 134 | Grease/OilLubrication of valves |
| 135 | Flex seal checking & bolts tightening |
| 136 | Removing guard for inspection of the starting clutch and refixing |
| 137 | Cooling water makeup work in GTs |
| 138 | Removing manhole door of inlet air/exhaust ducts for inspection and re-fixing |
| 139 | Unforeseen maintenance works for 2 hours period |
| 140 | Unforeseen maintenance works for 4 hours period |
| 141 | Unforeseen maintenance works for one dayperiod |
| 142 | Inlet air filters cleaning works units I / II |
| 143 | Inlet air filters cleaning works units III / IV |
| 144 | Cooling water radiator cleaning with Air/ water in GT units |
| 145 | Removal of Fuel check valves/Water Injection Check Valves for checking and refixing |
| 146 | Removal of Fuel Nozzle assemblies, cleaning and refixing |
| 147 | Removal of Generator Air Filters, cleaning and refixing |
| 148 | Cleaning/Replacement of lube oil filter / lube oil in Diesel Engines |
| 149 | Cleaning/Replacement of Fuel filters/Air Filters in Diesel Engines |
| 150 | Rectification works involving Gas Cutting / Welding |
| 151 | Cleaning & Painting pipelines/equipment at ground level per Sq.m |
| 152 | Cleaning& Painting pipelines/equipment above ground level per Sq.m |
| 153 | Handling of materials at site/store of weight above 150 Kg |
| 154 | Handling of materials at site/store of weight between 101 to 150 kg |
| 155 | Handling of materials at site/store of weight upto 100kg |
| 156 | Moving and installing mobile pump for dewatering |
| 157 | 1 CUM R.O and D.M plant filters cleaning |
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