Immediate Replacement and Rewinding of 25/63 KVA, 11KV/0.415KV Aluminium wound oil cooled Transformers with associated works under Berhampur and Phulbani SSA 2020-21, Ph-I

Amount

Dismantling the following ratings faulty transformer from the existing D.P. structure/Plinth & installation of standby/repaired transformer i/c testing and commissioning, recording the required parameters etc. by engagement of experienced & qualified staff, arranging required tools & plant with proper precautionary measures etc. as required.

i) 25 KVA, 11KV/0.415KV, 50 Hz Aluminium wound oil cooled Transformer

ii) 63 KVA, 11KV/0.415KV, 50 Hz Aluminium wound oil cooled Transformer

Rewinding of the HT windings of following ratings Oil immersed Distribution Transformer with superior grade and suitable size Double paper covered Transformer winding conductor , providing re-insulation of LT winding etc. including dismantling the transformer parts i.e. conservator tank, terminal boxes, bushings, removing the core and windings from the tank, draining of transformer oil, cleaning of tank etc. reassembling the core & windings and all the aforesaid parts after rewinding/repairing, pouring of superior quality and grade Transformer oil (supply of Transformer oil is not included in this item), replacement of breather, providing new silica gel, replacement of gaskets, worn out nuts, bolts and washers/cork washers etc, HV/ LV bushings and arcing horns if required, painting of the transformer body with two coats of synthetic enamel paints, heating in heat chamber, carry out factory tests as per technical specifications and submission of test certificates etc. complete as required. (The dismantled aluminium winding and other materials can be retained by the agency and credit for the same to be given in the quoted rate of this item)

i) 25 KVA, 11KV/0.415KV, 50 Hz Aluminium wound oil cooled Transformer

ii) 63 KVA, 11KV/0.415KV, 50 Hz Aluminium wound oil cooled Transformer

Supplying and pouring of transformer oil (IS:325) of suitable make & grade for topping up/replacement of old deteriorated oil etc. complete as required.

Filtration and de hydration of existing Transformer oil at factory / work shop , testing of BDV etc. as required.

Transportation of spare/new/Repaired 25/63 KVA transformer from Electrical Sub Division/workshop to respective sites by using suitable transportation medium including loading and unloading at both ends etc. complete as required. (The rate should be inclusive of toll gate fee/charges wherever applicable, nothing extra will be paid. Distance will be on shortest route only).

i) Distance up to and including 50 KMs

ii) Distance above 50 KM and up to and including 100 KMs

iii) Distance above 100 KM and up to and including 150 KMs

iv) Distance above 150 KM and up to and including 200 KMs

Transportation of faulty/burnt-out 25/63 KVA transformer from respective site to workshop/Electrical sub Divisions by using suitable transportation medium including loading and unloading at both ends etc. complete as required as per direction of Engineer in charge. (The rate should be inclusive of toll gate fee/charges wherever applicable, nothing extra will be paid. Distance will be on shortest route only).

i) Distance up to and including 50 KMs

ii) Distance above 50 KM and up to and including 100 KMs

iii) Distance above 100 KM and up to and including 150 KMs

iv) Distance above 150 KM and up to and including 200 KMs

Providing 25 KVA/63 KVA 11KV/0.415 KV Distribution Transformer on hiring basis as a stop gap arrangements etc. as required. (BSNL will not be held responsible for occurrence of any faults in the hired Transformer while working at site or any damage or loss occurred to the said Transformer during transportation, loading, unloading and negligence of the agency etc.). (Commencement date shall be the date of energisation and commissioning at site)

Replacement of faulty Lightening arrestors by new three piece (one set) nonlinear resistor type distribution class lightning arrestor suitable for operation on nominal system voltage of 11 KV and highest system voltage of 12 KV for transformer Sub-station, complete with galvanized clamping arrangement, G.I. bolts, nuts, washers, connection of earth strips etc. as required. (BSNL approved make)

Liasoning with supply authority for inspection of site by their maintenance / MRT personnel and taking shut down of 11KV line to carry out the repairing and maintenance works of the substation and re-energisation etc. complete as required.

Making arrangements for inspection and testing of the re winded transformer by the designated inspector of supply company at workshop and obtaining test certificates and clearance for re installation and energisation of the re winded transformer etc. complete as required.