REPAIR OF DAMAGED FAILED 33 11 KV 3.15 MVA 5.00 MVA AND 8.0 MVA POWER TRANSFORMER

Opening of transformer cover, draining oil, de-tanking core coil assembly, Assessment and estimation for Repair and replacement of part,providing locking arrangement on all valves & plugs as per requirement of specification,Cleaning & washing of dust/ rust & dirt from all other parts including core tanks & cooling tubes, re-tank.

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

SUPPLY OF FOLLOWING DAMAGED PARTS REQUIRING REPLACEMENT COMPLETE IN ALL RESPECT.

HV Leg Coil with insulation, varnish & baking of coil assembly (Vaccum impregation)(the burn leg is not be retained by contractor)

LV Leg Coil with insulation, varnish & baking of coil assembly (Vaccum impregation)(the burn leg is not be retained by contractor)

HT bushing (33 KV) as per relevant ISS.

LT bushing (11 KV) & Neutral bushing as per relevant ISS.

Bushing rod & other metal parts including nuts (indicating material & size of bushing rods) Brass

For HV

For LV

Set of Gaskets (rubberized cork neoprene material & size is to be needed)

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Breather Dehydrator (Silicagel type with fresh silicagel)

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Glass for oil level gauge

Taping switch handel only

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Off-load Taping switch (without handle)

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Oil drain/ filter valve of gun metal

LT Terminal plate with terminals if required

Fresh transformer oil of standard quality of ISI mark

Filtration charges if Transformer oil supplied by the Nigam / Repairer of the Transformer

Sundry items viz cover bolts, plug cap screws, washers, insulation material etc. with minor repairs of tank and other parts if any (Denting and welding etc. if required)

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Cooling Tubes/ Fins

Conservative Tank with detachable end plates

Dial type thermometer 100 mm size

Dial type thermometer 150 mm size with a set of alarm contact for 3.15 MVA and above transformer rating.

Double float buchholz relay

Rating plate made of stainless steel or brass or alumunium engraved with details as per specification including date of despatch of transformer after repair

Earthing Terminals

Air release valve

Arcing horns for HT bushing and LT bushing non adjustable type

Winding Temperature indicator with alarm

Plain Capaliary type oil level guage to be provided on the oil conservator with low level indicator

Magnetic type oil level gauge

Marshalling box for transformers

shut off valve (Gun metal ) 1 1/2"

Painting inside with two coat of Zinc chromate best paint and outside of transformer with two coat of grey paint and marking after derusting

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

To and Fro transportation charges from any of the circle store / Sub store to the work of the firm and back

a)Loading & unloading charges at firm's works and Nigam's stores (Both Sides).

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

b) Transportation charges Per Km.

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Charges for minor repair where replacement of coil is not involved

For 3.15 MVA Rating

For 5.0 MVA Rating

For 8.0 MVA Rating

Labour charges for opening the transformer tank top cover(if required to facilitate maintenance of transformer) after removing required accessories.Including all required T&P Up to 5 MVA transformer.

Preventing oil leakage by changing main gasket with material after removing cover.

Upto 1.6 MVA transformer

Above 1.6 MVA & upto 3.15 MVA transformer.

Above 3.15 MVA & upto 5 MVA transformer.

A) Change of HV/LV bushing gasket ring and rubber washers including supply of required material & draining /re-filling of oil as required.

B) For additional HV/LV bushing work. * This amount will not be payable incase the work of removing of Top cover gasket is also awarded in the same order.

Change of gaskets of valves/radiator / Buchhloze's Relay including cost of gaskets etc.

Valve's/Buchhloze's Relay

Radiator Valves.

Providing & Fixing (including replacement) of HV/LV bushing of reputed make & bushing rod of brass matel including cost of gasket & rubber rings .Gasket makes are TABROSS,TIGER, ZEBRA and any other reputed make.

A) HV Side

Upto 1.6 MVA transformer

Above 1.6 MVA & upto 3.15 MVA transformer.

Above 3.15 MVA & upto 5 MVA transformer.

B) LV Side

Upto 1.6 MVA transformer

Above 1.6 MVA & upto 3.15 MVA transformer.

Above 3.15 MVA & upto 5 MVA transformer.

Dehydration/Filteration and reconditioning of transformer oil (electricity shall be supplied by deptt.) as per norms and testing thereof in presence of sub-station Incharge.

Cleaning of oil scale deposits over the body and radiators of power transformer with thinner/detergent and de-rusting in perfect manner.

Upto 1.6 MVA transformer

Above 1.6 MVA & upto 3.15 MVA transformer.

Above 3.15 MVA & upto 5 MVA transformer.

Replacement of oil temperature indicator, winding temperature indicator, silica gel container, presser relief device, Magnetic oil gauge, Gas operated Buchhloz relay ( including all required accessories)

a) Oil temperature indicator

b) WindingTemperature indicator

c) Silica gel container

d) Presser relief device Make ATBUS

e) Magnetic oil level gauge.Make ATBUS

f) Gas operated Buchhloz relay( Double floating type make ATBUS)

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