Annual and quarterly maintenance in the 230 kV equipments available at Indoor Switchyard II and Annual maintenance of Station Transformer III SST A and B in Unit IV and V for the year 2025 2026

Cleaning, tightness, checking and assisting in MRT testing works and attending glow, changing the defective clamps if any, finger contacts and moving contacts, etc. in 230 KV SF6 breakers, Isolators (89B, 89C), LAS, CVT, CC & wave trappers for quarterlymaintenance. Including cost of consumables and T&P

Cleaning, tightness, checking and assisting in MRT testing works in 230 kV main bus IV, Bus section III SF6 breakers, pedestal PT and CT,89A isolators 6 Nos.Including cost of consumables and T&P

Cleaning, tightness, checking and assisting in MRT testing works in 230 kV main bus V, Bus section IV SF6 breakers, pedestal PT and CT,89A isolators 6 Nos.Including cost of consumables and T&P

Cleaning, tightness, checking and assisting in MRT testing works in 230 kV Transfer bus, 230 KV Transfer bus SF6 breakers, Support insulators,interconnected wall through bushing and 89A isolators 6 Nos.Including cost of consumables and T&P

Labour charges For Cleaning of strung Bus insulators at an elevation of 15 mts to make insulators healthy and to avoid carona discharge inclusive of cost of consumables and hire charges for T&P

For Cleaning of under hung Bus bar support insulators stacks and cleaning of steel structures at on elevation of 13.5 mtrs including movement of telescopic type tiltable ladder, discharge rods from Switch yard-II stores to the work spot and back on completion of works. To make insulators healthy and to avoid carona discharge inclusive of cost of consumables and hire charges for T&P

For Cleaning of wall through bushings CTs inside and outside at an elevation of 10.5 mtrs to make insulators healthy and to avoid carona discharge inclusive of cost of consumables and hire charges for T&P

Station Transformer-III, opening of covers in C3A & C3B Bus ducts and disconnection the flexible links in all 3 phases from Bus duct for transformer measuring IR value and restoration of links and assisting in testing of Buchholtz relay.

Station Transformer-III, cleaning and tightness checking of 3 Nos. HV Bushings and 6 Nos. LV Bushings in station Transformer –III inclusive of cost of consumables.

Station transformer-III, cleaning of Earth resistors and neutral grounding transformers, assisting in measuring the value of resistors and IR value of neutral grounding Transformer. Testing of Tan-Delta value of transformer bushing and HV testing of LAS inclusive cost of consumables.

Station transformer-III, cleaning and tightness checking of 3 Nos lightening arrestors and 3 Nos pedestal support insulators and its jumpers connection clamps tightness checking work inclusive of cost of consumables.

Station Transformer-III,Maintenance of entire C3A & C3B Bus ducts cleaning tightness checking of bolts and nuts and replacement of broken insulator and C3A and C3B flexible and fixed joints inspection work inclusive of cost of consumables.

Annual maintenance works in 2MVA Station service transformer opening of HV/LV Side top cover and draining of oil if any collected inside cleaning of oil chamber. Disconnection of HV cables and links cleaning and assist for MRT Testing and commissioning restoring of HVcables and LV links on completion of works inclusive of cost of consumables.

Opening of manhole covers in LV Bus duct for inspection and carrying out the maintenance work for one transformer (440Volts LV bus ducts) inclusive of cost of consumables.

Cleaning of LV bus duct bar and inspection of bus support insulators and replace the support insulators if any required in one number bus duct(440Volts LV bus ducts) inclusive of cost of consumables and T&P.

Tightness checking of all the rigid joints and flexible joints in one Bus duct.(440Volts LV bus ducts)inclusive of cost of consumables and T&P.

Cleaning of LV bus ducts external surfaces in one bus duct and neutral grounding resistor (440Volts LV bus ducts)inclusive of cost of consumables.

Restoration of all man hole covers after completion of all works in one bus ducts (440Volts LV bus ducts)inclusive of cost of consumables.

Providing earth rod, transporting of ladder, providing ladder to each insulators for climbing on insulator one by one water washing and cleaning of Station transformer-III R, Y & B Phase HT / LT bushing, neutral bushing , Lighting arrestors, Transformer top surface and all support insulators.

ABR ENGINEERS (BID ID -1256151)