Overhauling of Transformers 1.6 MVA in Petrochemical Plants

Overhauling of Transformers (1.6 MVA) in Petrochemical Plants.

Overhauling of TELK make 11/0.433 KV, 1.6 MVA Power Transformer of oil capacity- 2280 litres and complete body painting. Scope of work: A) Preliminary inspection of the Transformer. B) Draining of oil from the Transformer. C) Disconnection and disassembling of bushings, conservator, pipe lines, cooling fins, tap-changer, Inspection windows, Explosion vent unit, main tank lid etc. D) Dismantling of conservator tank, Inspection, cleaning, varnishing the interior (if needed) and reassembling after replacement of all gaskets. E) Servicing of MOLG / Level gauge, F) Servicing oil and winding temperature indicator. (shall be replaced if found necessary). G) Replacement of explosion vent diaphragm and wire guard together with gaskets H) Flushing the interior of the body and windings with new oil to clean inside. I) Replacing of all old gaskets of bushings, radiators, drain plugs, conservator, Inspection windows Buchholz relay, breather & pipe lines and main lid. J) Inspection of drain valves, radiator valves, HV, LV & Neutral bushings. (shall be replaced if found necessary) K) Dismantling, testing and servicing of Buchholz relay L) Inspection and tightening the inner connections. M) Rinsing of radiators with oil And inspection. N) Reassembling of the transformer to its original shape. O) Refilling of transformer old oil with new oil (shall be replaced if found necessary), processing and testing as per cl.5 of special conditions. P) Vacuum oil filling of the transformer. Q) Processing oil to the required level as per cl.5 of special conditions. R) Testing of oil as per cl.5 of special conditions. S) Transformer body cleaning and spray painting of the exterior with one coat of epoxy primer and two coats of epoxy paint, including supply of all required materials. T) Pre-commissioning checks for energisation.

Overhauling of ITL make 11/0.433 KV, 1.6 MVA Power Transformer of oil capacity- 1220 litres and complete body painting. Scope of work: A) Preliminary inspection of the Transformer. B) Draining of oil from the Transformer. C) Disconnection and disassembling of bushings, conservator, pipe lines, cooling fins, tap-changer, Inspection windows, Explosion vent unit, main tank lid etc. D) Dismantling of conservator tank, Inspection, cleaning, varnishing the interior (if needed) and reassembling after replacement of all gaskets. E) Servicing of MOLG / Level gauge, F) Servicing oil and winding temperature indicator. (shall be replaced if found necessary). G) Replacement of explosion vent diaphragm and wire guard together with gaskets H) Flushing the interior of the body and windings with new oil to clean inside. I) Replacing of all old gaskets of bushings, radiators, drain plugs, conservator, Inspection windows Buchholz relay, breather & pipe lines and main lid. J) Inspection of drain valves, radiator valves, HV, LV & Neutral bushings. (shall be replaced if found necessary) K) Dismantling, testing and servicing of Buchholz relay L) Inspection and tightening the inner connections. M) Rinsing of radiators with oil And inspection. N) Reassembling of the transformer to its original shape. O) Refilling of transformer old oil with new oil (shall be replaced if found necessary), processing and testing as per cl.5 of special conditions. P) Vacuum oil filling of the transformer. Q) Processing oil to the required level as per cl.5 of special conditions. R) Testing of oil as per cl.5 of special conditions. S) Transformer body cleaning and spray painting of the exterior with one coat of epoxy primer and two coats of epoxy paint, including supply of all required materials. T) Pre-commissioning checks for energisation.

Supply of gaskets and oil seals for the transformer, TELK make 11/0.433 KV, 1.6 MVA Transformer Oil capacity-2280 litres. Specifications of Rubberised Cork Gasket: The supplied gasket shall confirm to IS and following specifications: Type: C- very good oil resistant Grade: R C-70 C Sp. Gravity: 0.7- 0.8 Hardness: 70 +/- 5 irhd Compressibility@ 28 Kg/cm2- 30 +/- 5% for 6.3 mm 33 +/- 5 % for 9.6 mm Recovery@ 28 Kg/cm2- 80 (minimum

Supply of gaskets and oil seals for the transformer, ITL make 11/0.433 KV, 1.6 MVA Transformer Oil capacity-1220 litres. Specifications of Rubberized Cork Gasket: The supplied gasket shall confirm to IS and following specifications: Type: C- very good oil resistant Grade: R C-70 C Sp. Gravity: 0.7- 0.8 Hardness: 70 +/- 5 irhd Compressibility@ 28 Kg/cm2- 30 +/- 5% for 6.3 mm 33 +/- 5 % for 9.6 mm Recovery@ 28 Kg/cm2- 80 (minimum)

Supply and fixing of new Silica gel air breather assembly with Indicating type Silica gel and air dash pot for 1600 kVA Transformer, Capacity # 3 Litres Note: This is an optional item and the supply is insisted only on actual requirement.

Supply and replacing the ceramic bushes on LT side of Transformer, TELK make 11/0.433 kV, 1.6 MVA Transformer, Oil capacity-2280 litres. Rated current 3150A, Rated Voltage - 3.6KV, confirming to IS 3347 & IS 2099 with latest amendments. Note: This is an optional item and the supply is insisted only on actual requirement.

Supply and replacing the ceramic bushes on LT side of Transformer, ITL make 11/0.433 kV, 1.6 MVA Transformer, Oil capacity-1220 litres. Rated current 3150 A, Rated Voltage - 3.6 KV, confirming to IS 3347 & IS 2099 with latest amendments. Note: This is an optional item and the supply is insisted only on actual requirement.

Supply and replacing the ceramic bushes on HT side of Transformer, TELK make 11/0.433 kV, 1.6 MVA Transformer, Oil capacity-2280 litres. Rated current 250A, Rated Voltage - 12/17.5KV, confirming to IS 3347 & IS 2099 with latest amendments. Note: This is an optional item and the supply is insisted only on actual requirement.

Supply and replacing the ceramic bushes on HT side of Transformer, ITL make 11/0.433 kV, 1.6 MVA Transformer Oil capacity-1220 litres. Rated current 250A, Rated Voltage - 12/17.5KV, Confirming to IS 3347 & IS 2099 with latest amendments. Note: This is an optional item and the supply is insisted only on actual requirement.

Oil temperature indicator of Transformer, TELK make 11/0.433 kV, 1.6 MVA Transformer, Oil capacity-2280 litres Note: This is an optional item and the supply is insisted only on actual requirement.

Oil temperature indicator of Transformer, ITL make 11/0.433 kV, 1.6 MVA Transformer, Oil capacity-1220 litres Note: This is an optional item and the supply is insisted only on actual requirement.

Trans Electro

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