MID/AN/67

1. Repairs to 2.5MVA Automatic Voltage Regulator-II, by way of isolating various units of AVR from power supply (main) and controlling supply while following all safety measures pre/during work. It includes visual and close inspection of main transformers (step up/down transformer and Buck-Boost Transformer) for excessive corrosion and oil leakages, if any in chamber, conservator tank, radiator, etc. Checking of bushing for oil leakages, chips and cracks developed if any in the insulator. Checking of winding temperature indicator, Oil temperature Indicator thermometer, pressure relief valves, Buchholz relay. Checking quality and quantity of oil in the chambers, checking Di-electric strength/ BDV of transformer oil, insulation resistance value of transformer windings, earthing connection and its conductivity. Cleaning inside of oil chamber to remove all kind of unwanted deposition and sediments. Checking the existing oil for its specified di-electric strength/BDV and refilling in the chamber. Topping up with fresh transformer oil 550 ltrs. in units of AVR. Opening motor control box for inspecting of Servo motor with control system by replacing defective/damaged components, Time delay relay – 01no. Providing / fitting of PCB Sensing relay auto card. All of reputed make having actual specification as that of damaged ones. Dismantling of incoming and outgoing connections of voltage regulator unit from their respective terminal boxes. Complete job includes cost of material, labour charges, to & fro transportation, loading, unloading charges for all tools & tackles required for execution of job and all applicable taxes. Testing of AVR after repairs for all connected parameters with periodic observations.01 no. complete Job 2. Dismantling of all damaged burnt copper leads and then cleaning the AVR coil regulating Bakelite plate and all terminal points with recommended chemical cleaner and then providing and fitting of 04 no. of leads approx. 1.25 meters long each made out of 50 mm square multi-stand copper cables bent to shape to connect the coils with outgoing terminal points with the help of copper thimble provided at either ends of the leads. Complete job which includes the cost of material and cost of labour charges for skilled semi-skilled labour and tools required for the execution of 01 No. complete job. 3. Repair to by-pass arrangement/isolator unit of 6.6 KV 2.5 MVA AVR control unit by way of repair to input, out-put and by-pass isolating unit. Dismantling of damaged/busted 02 No. of isolator switch from by-pass oil switch and then providing and fitting of new 02 No. of isolator switch of 12 KV, 630A normal and breaking capacity and cleaning of all the insulators, cleaning of oil tanks after that P/Filling of fresh new 240 litre Transformer oil after De-moisturizing. Making all connections of power cables. Complete Job involves the cost of material, skilled, semiskilled labour and hire charges of tools required for execution of complete job checking of the whole system after completion of complete job on idle /full load capacity. 01 No. complete job

BEE AAR ENTERPRISES (BID ID -2629756)

NATIONAL ELECTRO-MECH COMPANY (BID ID -2632327)