Repairing of 100KVA HT Transformer installed at various pumping station of PHE Mech Sub Division Rajouri.

Amount

Mechanical Items

Repairs to 100 KVA HT transformer installed at Pumping Station Dhanore Dhindian by way of complete dismantling of transformer. Draining out transformer oil from the oil tank, servicing cleaning and flushing of oil tank by using chemicals to clean all the carbon deposits. Dismantling/extraction of all the damaged coils, Providing and fitting of new HV coils 42Kgs.,LV coils 27 Kgs., replacing lamination core 6 Kgs.Assembling of the transformer after providing and fitting of LV, HV bushesand metal parts, set of gaskets, sundry items and insulation etc.,filling of old T.Oil into the tank after cleaning/dehydration the oil properly and providing and filling of fresh transformer oil 50 ltrs. to top up the level then putting the transformer on heat till required megger valve is obtained and installation, testing and commissioning it on no load followed by on full load at site.Complete job including cost of material and labour charges and rebate on old material.

Repairs to 100 KVA HT transformer installed at P/Stn.Godhar D/Well. by way of complete dismantling of transformer. Draining out transformer oil from the oil tank, servicing cleaning and flushing of oil tank by using chemicals to clean all the carbon deposits. Dismantling/extraction of all the damaged coils, Providing and fitting of new HV coils 42Kgs.,LV coils 27 Kgs.,Assembling of the transformer after providing and fitting of LV, HV metal parts, set of gaskets, sundry items and insulation etc.,filling of old T. Oil into the tank after cleaning/dehydration the oil properly and providing and filling of fresh transformer oil 40 ltrs. to top up the level then putting the transformer on heat till required megger valve is obtained and Installation, testing and commissioning it on no load followed by on full load at site.Complete job including cost of material and labour charges

Rectification of 100 KVA HT transformer of p/stn. Sangum Rajouri by way of dismantling of HT Fuse link to disconnect the power and removing of the top cover of the tank of transformer, Replacing of damaged 4 nos. LT bush rods along with insulators. Assembling of transformer after providing and fitting new gaskets, filling of fresh T. oil 40 ltrs. to top up the level. Fabrication of new bus bars 4 nos. for LT Bush Rods and fitting them to LT Bush rods. Reconnected the electric cables after P/Fixing of new thimbles of 240 mm2 and tapping the same. Re-engagement of HT fuses to continue the power and testing the transformer on full load. P/F of Al-Cable 240mm sq. 3.5 core from LT fuse link set to main switch with proper thimbling and insulation. The complete Job includes cost of material and labour charges at site of work.

Major Repairing of 100KVA electric sub station with replacement of worn out electro-mechanical equipments at pumping station Dhanore Filtration Plant.The job involves cutting the HT supply of 100 KVA electric transformer. Dismantling of HT/LT connections, lifting up the damaged transformer from the installed position with the help of chain pulley block and manual labour and stacking it at suitable place. Then shifting it from Site to workshop by way of loading in the vehicle with the help of manual labour there on dismantling/ disconnection the connections of HT bush set & LT bush rod and taking out simultaneously, scratching the old and damaged core sheets and other internal connections by using special tools and tackles, extracting out core of transformer using gas cutter thereby dismantling each limp of Aluminum wound HT coils, extracting HT coils from core and its damaged insulations and draining out all transformer oil from its chamber servicing , cleaning and flushing the oil tank by using chemical to clean all carbon deposits and plugging of leakages. Providing and fitting of new HT leg coils- 08Nos. and LT leg Coils- 03 Nos. in place of damaged HT and LT coils fabricated of enameled Aluminum wire of required gauge and also providing and fitting of HT & LT metal parts, silicate breather set of gasket, oil level gauge, LT terminal plate, sundry items and insulations, insertion of HT coils /LT coils and then making the internal connection of the coil to make star connections on LT side and delta connections of HT side by way of copper gas welding etc. placing the core in the oven for removal of any type of moisture and for getting megger value. Complete assembling of transformer, topping up of the new transformer, oil 90 Approximately. and then putting the transformer, on no load till required megger value is attained. The complete job includes cost of material and labour charges ,carriages charge at site of work.

Repairing of 100 KVA HT transformer of pumping station Kalkash Stage 1st by way of lowering down the transformer from its installed position with the help of chain pulley block and skilled labour & then carriage/shifting of transformer to road side by head load carriages and shifting to workshop at Jammu(by deptt. Vehicle) opening/dismantling of transformer at w/shop. Extracting out the Tr. from the main body, P/F of HT coils -06nos, P/F of LT coils -02no. P/F of H T bushes with its metal parts -03no.P/F of LT bushes with its metal parts -03no.P/F of sundry items bolts & nuts, cork sheet & other allied item such as sleeves, cotton tapes etc. P/fitting of fresh T-oil 40ltrs. Assembling of Tr. and testing on load at site. Complete job includes the cost of material & labour charges and carriage /shifting charges. Testing the transformer on no load followed on full load at site of work.

N B Engineering and Electric Works

VERMA ELECTRICAL AND MECHANICAL WORKS