REPAIR AND MAINTENANCE OF TRANSFORMER, VCB, RMU, LT/HT CABLE, OVER HEAD LINE, STEEL TUBULAR POLES AND OTHER CONNECTED WORK AT ARDE UNDER GE(I) RnD PASHAN

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre deep and getting out in Soft/ loose soil complete all as specified and directed.

(b) All as per item No 01 above but Hard soil complete all as specified and directed.

(c) All as per item No 01 above but Soft disintegrated rock complete all as specified and directed.

Returning, filling in soil including spreading, levelling, watering and well ramming in layers not exceeding 25 cm complete all as spcified and directed.

Removal of excavated soil to a distance not exceeding 50 metre and depositing where directed at a level not exceeding 1.5 metre above the starting point complete all as spcified and directed.

Material and labour for dry crushed stone sand filling in trenches to required width at bottom and top of cable as in cushioning including spreading leveling and consolidation complete all as specified directed. Note : Punned thickness shall only be measured and paid.

Supply and lay in trenches un-reinforced precast concrete cable cover class LV type 1, flat size 250 x 150 x 40mm for cable protection complete all as specified and directed by the Engr-in-charge

Supply and lay in trenches reinforced precast concrete semi round cable cover of size 1000 mm x150mm x 32mm for HT cable protection complete all as specified and directed by the Engr-in-Charge.

On load filteration of transformer oil by contineous circulation of transformer oil through mechanical filters to achive the desired dielectric strength of 60 KV for one minute at 2.5 mm gap complete all as specified and directed. Note: 1.Oil samples are to be collected from top and bottom of oil tank and test results to be recorded for each sample before and after filteration.

Supply and topping up transformer oil of dielectric strength 50 KV at 4 mm gap in transformers of various capacity installed in various locations complete all as specified and directed. Make of Transformer oil: Savita / Power oil / HP Notes : (a) New Transformer oil will be filled in the transformer only after filteration and dehydration of existing transformer oil of the transformer. (b) Transformer oil shall be supplied in sealed barrel with test result and test certificate.