WORK OF DISMANTLING OF OLD 20 MVA TRANSFORMER AND ERECTION OF 40 MVA TRANSFORMER AND OTHER ASSOCIATED WORKS AT 132 KV S/S GIDA UNDER ETD-II , GORAKHPUR

Amount

Following works to be carried out at 132 KV Subtation GIDA by replacement of existing old 20 MVA 132/33 KV Transformer by new 40 MVA 132/33 KV Transformer along with associated work.

Disconnection of all cable connection from old 20 MVA T/F , control & relay panel , DM and Marshalling Box including dismantling of Control & Relay panel and shifting the same to storage place as per direction of Engineer.

Dismantling the shifting of old 20 MVA Transformer RTCC Panel from relay room including necessary disconnection of control cables including identification of cable for necessary future connection and shifting the same at proper place/store.

Dismantling of 120 KV LA,s along with ALP Structure and proper stacking after opening of Jumpers and disconnection of earthing (01 Job for each set of LA's and ALP Structure).

Complete safe dismantling of the accessories of 20 MVA T/F after opening of jumpers , removal of earthing , opening of cable connection , draining out of Transformer oil up to required level in 209 Ltrs. Capacity oil drums , removal of conservator tank , pipe line , bushing , cooling fans and pumps, marshalling box , radiator after draining of radiator oil in empty drums and fixing of blanking plates on the radiator , pipe lines , conservator tank , turret etc. suitable blanking plates including bolts and nuts shall be provided by the contractor.

Shifting of main tank of old 20 MVA Transformer to storage place from the plinth up to 20 Mtr. Distance including turning of tank if required.

Additional shifting of Transformer Tank up to 50 Mtrs. Distance ( 01 job for every 05 Mtrs.).

Shifting of main tank of 40 MVA Transformer to plinth from place of storage up to 20 Mtr. Distance including turning of tank if required.

Additional shifting of Transformer Tank up to 80 Mtrs. Distance ( 01 job for every 05 Mtrs.).

Erection of 40 MVA Transformer RTCC Panel including shifting from storage place to control room.

Complete erection of 40 MVA Transformer including radiators , conservator tank , bushing , connection pipe line , cooling fans and pumps , marshalling box , OTI , WTI , capillary pipe etc.

Topping of fresh Transformer oil from Transformer oil drums in suitable capacity oil tank and then centrifusing of transformer oil by ultra high vacuum oil filtration plant after connecting the centrifusing pipes with oil tanker to oil filtration plant including taking the BDV value of oil periodically till the required value is achieved and creating the vacuum inside 40 MVA Transformer before filling the Transformer oil including vacuum stand test with all cost of centrifusing machine , CFM Operator , lubricant etc.

Centrifusing of the complete transformer oil of 40 MVA Transformer by ultra high vacuum oil filtration plant after connecting the centrifusing pipes with oil tank to oil filtration plant including taking the BDV value of oil and megger value of the transformer periodically till the required value is achieved including filling and topping up of the transformer oil under vacuum in main tank , radiator, conservator tank etc. and attending the oil leakages if any , will all cost of centrifusing machine , CFM Operator , lubricant etc.

Complete earthing of 40 MVA Transformer with 50x6 mm /75x10 mm size M.S. Flat as per standard practice at two points.

Earthing of Main Tank , Marshaling Box and drive mechanism of cooling fans etc. and its connection of with already laid earthmat as per standard practice.

Earthing of HV & LV neutral with separate 75x10 mm size M.S. Flat as of 40 MVA Transformer with help of 75x10 mm size M.S. Flat to be provided by the department its jointing with already laid earthmat / delta including making of new delta , if required and necessary modification in existing support for earthing of neutral bushing support for its earthing work and then painting of earthing strips as per technical specification / standard practice.

Erection of 120 KV LA including erection of ALP Structure and connection of earthing with existing M.S. Flat as designated place and Jumpering with 132 KV Jack Bus as per technical specification (01 Job for each set of LA's and ALP Structure).

Jumpering of 40 MVA Transformer with associated terminal connector and PG Clamps etc. to connect with 132 KV & 33 KV Bus Bar / CTs.

HV Side with single ACSR Panther Conductor.

LV Side with twin ACSR Moose Conductor.

Re-termination of existing control and power cables as per cable schedule of 20 MVA Transformer and its OLTC / RTCC pannels into new 40 MVA Transformer at both end and control and relay panel, cooling fans and pumps , marshalling box etc. using existing cable including laying , dressing and binding of additional control cables if required as per site requirement and termination along with making necessary holes using gland plate or box where ever required . Fixing of cable glands of appropriate size, Providing of ferrules and cable termination as per standard practice and all other associated work as per technical specification.

Proper packing of HV / LV and neutral bushing of dismantled 20 MVA Transformer including proper wrapping with polythene sheet in wooden creates of new bushing of 40 MVA Transformer.

Conducting testing by arranging appropriate equipment for following testing -DGA , BDV , TAN DELTA from NABL Lab.

Omurmila Constructions

Preeti Enterprises