Regarding Annual Maintenance Contract for 11 KV Distribution Transformers installed at Multi Office Complex, Govt. House, Secretariat Building, Collectorate Building, Lekha Bhavan, Adivashi Bhawan, Dunetha WTP, Dabhel WTP, Magarwada WTP, Bamanpuja WT

Items :

Testing of transformer oil by calibrated instrument for dielectric breakdown strength with test report

Replacing old and unserviceable gasket of Top cover plate of Transformer having following capacity. (B)315 KVA

Replacing old & unserviceable gasket bushing of H.T. for the following capacity Transformer (B)315 KVA

Replacing old & unserviceable gasket bushing of L.T. for the following capacity Transformer (B)315 KVA

Outside painting of Transformer for the following capacity (A) 250 / 315 / 500 KVA

Replacing the oil level glass of the 250/315/500/750/1000/ 1250 KVA by new one

Routine maintenance of Transformer in operating covering Insulation Resistance oil breakdown strength, reconditioning /replacement of silica gel, cleaning of transformer & topping up to of oil if required .(Oil will be provided departmentally or at extra cost.)

Replacing H.T. bushing of 250 / 315 / 500 / 750 / 1000 /1250 KVA transformer by new one.

Replacing H.T Bushing metal parts of 250 KVA / 315 / 500 / 750 / 1000 /1250 KVA Transformer by new one.

Replacing H.T. bushing all other parts of 250 KVA / 315 / 500 / 750 / 1000 /1250 KVA Transformer.

Replacing L.T. bushing of following capacity Transformer (A) 250 KVA / 315 KVA

Replacing L.T.Bushing metal parts of 250 / 315 / 500 / 750 / 1000 /1250 KVA Transformer.

Replacing L.T.Bushing all / other parts of the 250 / 315 / 500 / 750 / 1000 KVA /1250 kva transformer.

Carrying out various routine test as per instruction of in charge for following capacity transformer. (A) 250 KVA / 315 KVA

(B) 500 KVA / 750 KVA/ 1000 KVA/1250 KVA

Replacing the breather of the Transformer of following capacity. (A) 250 KVA / 315 KVA

(B) 500 KVA/750 KVA/1000 /1250 KVA

Transformer oil having good resistance to high electrical stress, high di-electric strength (50KV) low viscosity, low pour point, high flash point and excellent thermal properties for efficient heat transfer and cooling as per I.S.335 -1972.

Filtration of transformer oil as per I.S. for removal of moisture, carbon. slurry etc.by means of circulating oil through vacuum pump from heating elements and filters to with stand the breaking strength of the oil above 40KV beyond one minute tested in oil testing Kit. (A) on site.

Providing, and erecting 11 KV D.P. 9 mtr. high Structure made of 6" x 3" ‘I’-Section Girder, 4" x 2"channels, clamps, nuts, bolts etc. Suitable for erection of the followings duly connected with necessary ACSR conductors. as per drawing approved by the Engineer- in charge complete with following. Height as per IS 7 Mtr above ground ) (A) 11 KV 200 Amps Drop out fuses with S.R.B.P. tubes carries.-Three nos (B) 11 KV G.O.D. switch complete with insulators, operating handle with galvanised pipe, Sq.bar etc. 400 Amp.- One Set (C) 11 KV lightening arrestor with clamp- Three Nos. (D) 11 KV shackle insulators- Six Nos. (E) The above D.P. structure should be earthed with 25 mm.X 3 mm thick double copper earth strips run separately and connected with separate copper plate earth electrode.

Providing and erecting cable end termination kit, heat shrinkable Push on type Densons/ Raychem/ Elastimold make suitable for 11 KV XLPE cable 3core 95 & 120 Sq.mm (A) Outdoor type

(B) Indoor type

Conveyance charges for transformer from workshop to site or back. one side) (I) Local up to 10 Km

(ii) Outside Divisional Head Quarter for first 30 Km from store.

(iii)Add for each block of additional 30 Km

Loading/Unloading transformer on one side (A) 250 KVA / 315/500 KVA

Supplying & erecting earth pit of minimum bore dia.150mm size approved make Earthing Electrode consisting Pipe-in-Pipe Technology as per IS 3043-1987 made of corrosion free hot dipped G.I.Pipes having Outer pipe dia of 50mm having 80-200 Micron galvanising, Inner pipe dia of 25 mm having 200-250 Micron galvanising, connection terminal dia of 12mm with constant ohmic value surrounded by highly conductive compound with high charge dissipation suitable for following type of applications with chamber and heavy duty cover.(approved make OEM has to submit test certificate) & having back filling compound of (B) Inner chemical (CCM Compound)- Resistivity:- 0.2 / meter testing as per IEC 62561-2017, Voltage drop:- < 1 volt at no load & dry form, Sulphar content:- <2%(C) Back fill Compound :- Earthing compound should be capable to retain moisture for long time Necessary test report must be submitted. (c) For Electrical Installation covering Transformer Neutrals, Lightning arrester Earthing, A.C.Plant & Sensitive Computer System(like Automation, SCADA) i.e independent Earthing in normal soil. Length of Pipe : 3.00 mtrs Back filling Compound :2 nos Bags of 25 Kg.

Maverick Electricals (BID ID -8530)

Accurate Instruments and electricals (BID ID -8536)