bids are invited for operation and maintenance of switchyard following works are to be carried out at 220 kv s/s, chinhat sub station under etd-ii, lucknow 1. tracing the dc earth leakage and attending the dc earth fault at 220/132/33 kv s/s chinhat with the help of dc earth fault tester alongwith all necessary t&p by a team of skilled engineers, technicians and unskilled technicians. the job includes dcdb ,battery charger, marshalling box of all transformers, switchyard equipments i.e.cbs, isolators, relay protection panels etc. for the tracing of dc earth leakage and there by checking all the defective control cables and removing/rectifying the defective cables by opening the terminal block connections, refitting the new cables in the cable glands and proper cable dressing of cables laying on the ground in treches on the cable racks by repairing racks of cable trenches as per site conditions and instruction of site engineer incharge. the replacing of defective cable with less than 10 meter of length to be done by the contractor at his own cost. a. 220 kv lines control and relay panels and respective yard equipment including trench. b. 220 kv tbc panel and respective yard eqipments including trench. c. 63 mva 132/33 kv t/f-i &ii panel(hv side) and respective yard equipment including trench. 2. dismantling and removing of old and unused (2c,4c,6c)control cables from different cable racks and cable trenches. the work includes opening of its binding, making piles and shifting to site storage place alongwith opening trench cover and recovering after completion of work satisfactorily.