Capital work of 110kV Substation Nedumangad - Enhancing station capacity by replacing 12.5 MVA 110/11kV transformer No.1 with new 20MVA 110/11kV transformer

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)

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 3 phase transformer up to 50MVA.

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.

Turning the transformer of weight above 30 to to 40T,up to 90 degree using required tools safely and taking all precautions as per the directions of the departmental officers ( only if it is absolutely necessary and where departmental crane is not available)

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.

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.

Turning and shifting 6000 L/H capacity transformer oil filtering plant or wheel mounted 10000/15000 Litre. oil tank with all accessories for a distance of 20M to road, towing the machine with department lorry by the use of D-Shackle and iron ropes , accompanying the lorry including supervision through out the journey especially in turnings to avoid falling of plant. Remove the machine from the lorry and drags up to 10M for safe storage wherever required.

Covering the transformer with tarpaulin using ropes, bamboos etc.

Giving three phase connection to the filter unit from the supply mains using cable including fitting three numbers of fuse units near the filter unit and laying the cable from control room to filter unit and trial run of filter unit after giving connection etc. complete. ( Only if found absolutely necessary and where departmental staff is not available ).

Filling the filtered oil into the main and OLTC tank then conducting hot oil circulation till to obtain a satisfactory value of Megger and BDV for the oil including collecting of sample and taking BDV in each interval, taking Megger reading etc. and after filtering provide the breather of a 220/110 or 66KV 3 phase transformer up to 50MVA.