REPAIRS MAINT OF TRANSFORMER INCLUDING DEHYDRATION AT NAVAL DOCKYARD UNDER GE NW KUNJALI

Amount

Testing of di-electric strength of transformer oil of transformer indoor/outdoor type,6.6KV/433 Volts,before filteration and to remove moisture and impurities and to improve di-electric strength above 48 KV /minute through filtration plant incl filling of new transformer oil for topping up, testing complete all as specified. Filtration of transformer oil by electrically operated transformer oil filtration plant to achive a test result of 48 KV/min for distribution transformer and 80 KV/ minute for power transformer for 2.5 mm gap.( Note: Testing machine and Transformer oil filtration plant as well as dehydration facility will provided by the contractor also new transformer oil shall be measured and paid separatelly under respective items).

Draining out old transformer oil of high acidic value and supply and fill new transformer oil heavy duty as per IS 335 of distribution transformers, di-electric strength not less than 40 KV /min for 2.5mm gap. Note :- New transformer oil shall be measured and paid separatelly under respective items

Testing of transformer for dielectric strength, specific resistance, dielectric dissipation factor, Water content, acidity, sludge content, Interfacial tension, viscosity, flash point, pour point of transformer up to 1000KVA etc from NABL approved lab and test reports duly signed by all concered to be kept on record complete all as specified and directed.

Supply only transformer oil heavy duty as per IS 335 for topping up of distribution transformers, di-electric strength not less than 40 KV /min for 2.5mm gap. Make :- Power / Asain / Savita / Electric

Taking out old silica gel and supply & filling new silica gel in breather assembly of indoor/outdoor transformer fixed in repair.

Supply only transformer oil heavy duty as per IS 335 for topping up of power transformers, di-electric strength not less than 70 KV /min for 2.5mm gap. Make :- Power / Asain / Savita / Electric

Material & labour for replacement of unserviceable breather assembly transparent body type suitable for capacity upto 500 KVA of Make :- Amson or equivalent.

All as per item No 7 above but of capacity 500 to750 KVA.

All as per item No 7 above but of capacity 750 to 1000 KVA.

All as per item No 7 above but of capacity 1000 KVA.

Supply and fix rubber insulation mat sheet suitable for 11000 Volts grade of size 2.0 x 1.0 Mtr having thickness of 19 mm , black in color (ISI Marked ) all as specified and directed (Make Jyoti.)

All as per Ser No 11 herein before but of 1100 Volts,12 mm thick

Decanning of tfr oil and taking out defective /burntout HT/LT coil windings from core including mild steel frame from the transformer and complete cleaning from inside de-sludging foreign materials and rewinding and varnishing ,filling up with insulating materials cores all accessories etc pouring of transformer oil,commissioning and testing complete for the following sizes: (Note : Transportation charges from various sub station/areas to factory are deemed to incl in the schedule rates.)

1000KVA capacity

750KVA capacity

630KVA capacity

500KVA capacity

Material & labourfor for earthing complete with galvanized steel earth electrode of size 600 X 600x6mm thick buried directly in ground earth pit not less than 2.25 m deep below normal GL with top edge of the earth plate not less than 1.5m below GL connected with GI earth strip 32 X 6 mm (up to 7.5m long) by means of GI nuts bolts and washers etc. MS funnel, GI watering pipe, including provn of PCC 1 : 3 : 6 type C 2 pit and RCC 1 : 2 : 4 Type B-1 cover 40mm thick, excavating & earthwork in any type of soil & removal of surplus soil up to 50M, all as all as shown in SSR part I electrical plate No-5, and testing on completion, complete as specified & directed.

Material & labour for shock treatment board of size 50cm x 75cm for electric instalatios written in English, Hindi and local language including figure showing all actions of treatmentin computerised letter with photo lamination on clear acrylic sheet of 10mm thick complete all as specified and directed by Engineer-in-Charge.

Replacement of old un-serviceable LED lamps from existing LT panel board and supply and fixing new LED Lamp including making necessary electrical connection all as specified and directed by Engineer-in-Charge.

Bushing with copper stud upto 1600 KVA transformer

Temperature gauge suitable for transformer upto 1000 KVA

Rubber sheet gasket suitable for transformer upto 1600 KVA

Buchholz relay for transformer of any capacity all as specified and directed.

Painting of transformers of any capacity including removing of old exixting pait clening the surface and carryout necessary painting on it by applying two coat of synathatic enamil paint of colour dark sky blue all as specified and directed.

Disconnecting LT and HT side of transformer of capacity upto 500 KVA, draining of transformer oil and storing the oil in clean drums, removal of core assembly using tripod and chain pulley and cleaning with hot washing to remove sledge and other foreign particles from the assembly and inspecitng the winding for any damage and transformer body for any leakage, tightening of bushings, replacement of rubber gaskets and re-assembling the transformer all as directed and specified by Engineer-in-Charge

All as per item No 27 above but for capacity more than 500 KVA and upto and including 1000 KVA

All as per item No 27 above but for capacity more than 1000 KVA

Supply and fixing two sets of cooling fins of transformer as per existing and as directed.

Urja Techniques India Pvt. Ltd.

Ashirwad Contractor and Supplier

OM SAI POWER SYSTEMS

AGRAWAL ASSOCIATES

Shree Ayyappa Engineering

cooltech engineering services