Upgradation of 66kV Substation Alappuzha to 110kV level Assembling and Erection of 110/11kV 20 MVA Power Transformer

Loading the 6000/5000litre/hr.or above transformer oil filter plant to lorry using tripod, chain block, pulley block, rope etc., after pulling it to the convenient position for lifting and fixing it firmly for safe transportation to the location as directed by department officers, unloading the same without causing any damage and placing it carefully at convenient place etc. complete as directed by department officers at site wherever required.

Loading the empty oil tank of capacity 10000/15000 Ltr. From the place of its storage using wooden blocks, lever etc. and moving the tank to a distance of 10M from switch yard then loading the same to the dept. vehicle using chain pulley etc. carefully tying the tank in vehicle accompanying the vehicle up to .................. substation, removing ties and unloading the tank carefully by the use of wooden blocks rails, chain pulley etc. again moving the tank to a distance of 50M, for safe storage.

Collecting from store or substation wherever available tools and materials such as jacks pulling and lifting machines,rails,sleepers, plies, ropes, empty drums, dummy plates, bolts and nuts gaskets, etc. including loading and unloading in department vehicle and accompanying and returning the same after completing the work as per the direction of departmental officers.( Only if required)

Pulling the power transformers of weight above 30T to 40T, on the rail track, travelling for a distance up to 30M, using sleepers, rails, jacking, pulling and keeping ready for placing on the correct plinth as per the direction of departmental officers at site, safely without damaging any equipments and observing all safety precautions.

Assembling the 220/110 or 66KV 3 phase transformer up to 50MVA with all accessories in complete shape and filling oil if required including arresting the movement of the transformer by locking as per the direction of the departmental officers.

Covering the transformer with tarpaulin using ropes, bamboos etc.

Disconnecting the power connections to the filtering plant/ vacuum pump, coiling the cable, disconnect the hoses and coiling them and folding and removing tarpaulin used for covering the transformer, moving the filter plant and vacuum pump to a distant place as directed by the department staff. ( where departmental staff is not available and is found absolutely necessary).

Filling the oil in to 10000-15000 Ltr. capacity tank after bringing the new oil barrel from its place of storage and circulating the same to obtain the necessary value of a 220/110 or 66KV 3 phase transformer up to 50MVA

Connecting Vacuum Pump and creating vacuum pressure up to -760 Hg/mm and keeping the same for 24 Hours and monitor the same after leading the plant to yard including connecting equalising connection for OLTC of a 220/110 or 66KV 1 phase transformer up to 50MVA.

Hot oil circulation after draining oil from transformer, evacuating the transformer by using vacuum pump after providing LT connection to the pump , connecting the hose to transformer, operating carefully and continuously for attaining sufficient vacuum and keeping in vacuum for 24 hours and operating filter unit carefully and continuously for 24 hours except halt due to poor voltage and trouble in filter plant etc complete as per the direction of dept. officers.