Maintenance of Transformers

Amount

Maintenance & Oil filtration of transformers at various Sub-Stations as per clause no.1 of specification.

50MVA, 100KV/22KV/11KV Three winding transformer with OLTC (Make M/s CG) at 110KV Receiving-Station

50MVA, 110KV/22KV/11KV Three winding transformer with OLTC (Make M/s TELK) at 110KV Receiving-Station : Only one time Oil Filtration in contract period

10MVA, 11KV/6.6KV transformer with OLTC at 110KV Receiving-Station

2.0MVA, 11KV/415V transformers with OCTC at 110KV Receiving-Station

1.5MVA, 11KV/415V transformer with OCTC at 110KV Receiving-Station

1.5MVA, 11KV/125V Rectifier transformer at 110KV Receiving-Station

16MVA, 22KV/11KV transformer with OLTC at 22KV Main Sub-Station

500KVA, 11KV/415V transformer with OCTC at 22KV Main Sub-Station

2.0MVA, 22KV/415V transformer with OLTC at 22KV IRE Sub-Station

1.5MVA, 22KV/415V transformer with OCTC at 22KV AFD Sub-Station

2.5MVA, 22KV/415V transformer with OCTC at 22KV AFD Sub-Station

2.5MVA, 22KV/415V transformers with OLTC at 22KV FCD Sub-Station

2.0MVA, 22KV/415V transformer with OLTC at 22KV AUMP Sub-Station

2.0MVA, 11KV/415V transformer with OCTC at 11KV Engg. Hall Sub-Station

1.5MVA, 11KV/415V transformer with OCTC at 11KV Engg. Hall Sub-Station

1.0MVA, 11KV/415V transformer with OCTC at 11KV DEED Sub-Station

1.6MVA, 11KV/415V transformer with OCTC at 11KV CDM Sub-Station

1.0MVA, 11KV/415V transformer with OCTC at 11KV Van De Graff Sub-Station

2.0MVA, 11KV/415V transformer with OCTC at 11KV CTD Sub-Station

1.5MVA, 11KV/415V transformer with OCTC at 11KV RCnD Sub-Station

1.5MVA, 11KV/415V transformer with OLTC at 11KV RCnD Sub-Station

500KVA, 11KV/415V transformer with OCTC at 11KV Purnima Sub-Station

1.0MVA, 11KV/415V transformer with OCTC at 11KV RSMS Sub-Station

5.0MVA, 11KV/3.3KV transformer with OLTC at 11KV CFB Sub-Station

2.5MVA, 11KV/415V transformer with OLTC at 11KV CFB Sub-Station

2.0 MVA, 11KV/415V transformer with OCTC at 11KV CFB Sub-Station

2.0 MVA, 11KV/415V transformer with OCTC at 11KV CAP Sub-Station : Only one time Oil Filtration in contract period

2.0 MVA, 11KV/415V transformer with OCTC at 11KV CAP Sub-Station

5.5MVA, 11KV/3.3KV transformer with OLTC at 11KV CAP Sub-Station

2.0 MVA, 11KV/415V transformer with OCTC at 11KV Boiler House : : Only one time Oil Filtration in contract period

Maintenance of Cast Resin Dry Type transformers at various Sub-Stations as per clause no.2 of specification.

2.0 MVA , 11KV/433V transformer with OCTC at 11KV Modular Lab Sub-Station No.3

2.0 MVA , 11KV/433V transformer with OCTC at 11KV Modular Lab Sub-Station No.2

1600 KVA , 11KV/433V transformer with OCTC at 11KV Modular Lab Sub-Station No.1

1000 KVA , 11KV/433V transformer with OCTC at 11KV Central Complex Sub-Station

300 KVA , 11KV/433V transformer with OCTC. at 11KV Hill Sub-Station

300 KVA , 11KV/433V transformer with OCTC. at 11KV VHF Sub-Station

1250 KVA , 11KV/433V transformer with OCTC at 11KV New Animal House Sub-Station

3500 KVA , 11KV/433V transformer with OCTC at 11KV New Engg. Hall Sub-Station

Supply and installation of rubberised Cork Sheet Gaskets of following thickness as per clause no. 3 of specification.

3mm thick

6mm thick

10mm thick

Supply & installation of Silica Gel Breather of metal body of following sizes/capacity as per clause no.4 of specification.

Suitable for 1/2" BSP pipe & capacity 0.5Kg Approx.

Suitable for 1" BSP pipe & capacity 1Kg Approx.

Suitable for 1" BSP pipe & capacity 1.5Kg Approx.

Suitable for 1" BSP pipe & capacity 2.5Kg Approx.

Suitable for 1 1/4" BSP pipe & capacity 5Kg Approx.

Supply & installation of silica gel crystal as per clause No. 5 of specification

Supply, installation, testing and commissioning of gas actuated Buchholz relays as below on various transformers as per clause No. 6 of specification.

Type GOR-1 suitable for connecting on 25mm die pipe

Type GOR-2 suitable for connecting on 50mm die pipe

Type GOR-3 suitable for connecting on 80mm die pipe

Supply & Installation of Magnetic Oil Level Gauge as per Clause No. 7 of specification

Supply & Installation of Butter fly valve flange type as per Clause No. 8 of Specification

Supply and Installation of Moisture measurement instrument of Transformer Oil as per Clause No. 9 of Specification

Condition monitoring tests for 50MVA, 100KV/22KV/11KV, 16MVA, 22KV/11KV ,10MVA , 22KV/11KV ,10MVA,11KV/6.6 KV transformers as per clause no. 10 of specification.

Measurement of sweep frequency response analysis (SFRA) of the transformer windings

Measurement of HV & LV Tan delta& capacitance of windings along with bushing

Testing of transformer OIL SAMPLE of Transformers as per clause no. 11 of specification.

Dielectric strength (Break down voltage)

Water content (PPM)

Oil parameters per applicable latest IS 1866 : BDV, water content, Acidity, IFT, Resistivity at 27 C & 90 C, Sediment & Sludge, Flash point, Dissipation factor ( tan delta) at 90 C

DGA (Dissolved Gas analysis) testing

Furan's test

DP (Degree of polymerization) test

Attending / arresting oil leakage of transformer by replacement of complete gasket (Top cover plate, Valves, Radiators, Cable Boxes etc) as per clause No. 12 of specification.

1 MVA to 1.5 MVA transformer.

2 MVA to 2.5 MVA transformer

Testing of transformer of 500KVA to 50MVA capacity & ratings as per clause no. 13 of specification.

For 500 KVA to 2500 KVA

For 5.0 MVA to 16 MVA

For 50 MVA

Monsoon protection of all accessories of Transformers (Buccholz relay, Marshalling Box, Breather, etc.) as per Clause No. 14 of Specification

Filtration of Oil as per Clause No. 15 of Specification

Reprocessing/Reconditioning of Old Transformer oil as per Clause No. 16 of Specification

Supply & Installation of Oil Surge Relay as per Clause No. 17 of Specification

Supply & Installation of Pressure Relief Valve as per Clause No. 18 of Specification

Supply & Installation of Winding Temperature Indicator (WTI) as per Clause No. 19 of Specification

Supply & Installation of Oil Temperature Indicator (OTI) as per Clause No. 20 of Specification

Supply & Installation of Transformer identification marking as per Clause No. 21 of Specification

Supply & Installation of Cooling radiator as per Clause No. 22 of Specification

Suitable for existing 1500KVA, 11KV/433V, CG make transformer having 12 numbers radiators of size (in mm) 1020(L ) X 75(W) X 1140(H), Flange 125mm X 125mm including modification work.

Suitable for existing 1500KVA, 11KV/433V, CG make transformer radiator of size (in mm) 920(L )X 340(W) X 1190(H), Flange 150mm X 150mm

Suitable for existing 1500KVA, 11KV/433V, CG make transformer radiator of size (in mm) 830(L )X 280(W) X 1190(H) mm, Flange 150mm X 150mm

Fortnightly Preventive Maintenance of Transformer as per Clause No. 23 of specification

Supply and installation of following parts of OLG make OLTC type "ABS III 300 30 12 11 00" / "ABS III 300 30 9 11 6G" / "ABS III 200 12 17 17 0" installed at various Sub-Station as per clause no. 24 of specification.

Fixed contact

Main contacts with Teflon insulated bush

Transition moving contact hinge assembly

Motor belt

Supply & Installation of BDV tester as per Clause No. 25 of Specification

Supply & Installation of MS Trolley (for transport of 1 Oil drum) as per Clause No. 26 of Specification

Supply & Installation of Danger Boards (11KV & 22KV) as per Clause No. 27 of Specification

SITC of LA (9kV, 5kA) suitable for 300KVA to 1MVA 11KV/433V Dry type Cast resin Transformer as per Clause No. 28 of Specification

Supply & Installation of Winding CT for 2.5MVA, 11KV/433V Transformer as per Clause No. 29 of Specification

Shifting of Oil drums (within a distance of 3-5km) as per Clause No. 30 of Specification

Supply & connection of Single phase 1HP Pump (with starter) for oil draining with all connecting pipes and accessories as per Clause No. 31 of Specification

High tensile nut & bolts (size as per site requirement) as per Clause No. 32 of Specification

Supply & Installation of Marshalling Box along with all accessories as per Clause No. 33 of Specification

Removal of Air cell from Transformer conservator and replacement of MOG along with one side end plate as per Clause No. 34 of Specification

Replacement of spare parts for Oil filtration machine as per Clause No. 35 of Specification

Oil filter

Connecting pipe (15mtr long) with coupling mechanism

4C 10sq. Mm Flexible Cu cable

Vaccum Oil

Supply & Installation of Discharge Rod as per Clause No. 36 of Specification

Supply & Installation of High Voltage Tester as per Clause No. 37 of Specification

Supply and Installation of Steel bottle for DGA sampling as per Clause No. 38 of Specification

Supply and installation of Three element auxiliary relay VAA33 for one to one replacement at site as per clause No. 39 of specification.

High voltage, self fusing EPR based tape a roll of 30 feet length x width of 38mm x 0.76 mm thickness with transparent snake liner & tamper proof void guarantee sticker as per clause No. 40 of specification.

Shifting and transporting of materials as per clause No. 41 of specification

Providing and supplying of Truck of minimum capacity 09 MT with Five Labours for the collection and transportation of scrap items, unserviceable equipments, furniture, debris, garbage at various location inside BARC Trombay, Mumbai, as instructed by Project Engineer.

Providing and supplying Hydra crane 15 MT capacity for lifting Transformer Top Cover Plate and the collection and transportation of scrap items, unserviceable equipments, from various location inside BARC Trombay Mumbai.

MS Works as per clause No 42 of specification