rfq-8475 preventive and breakdown maintenance jobs of electrical installations at concentrator plant . preventive and breakdown maintenance jobs of electrical installations at concentrator plant . , eot cranes maintenance ( 30/5 t & 20/5 t ) preventive & breakdown maintenance of 30/5 t and 20/5 t eot cranes . job includes maintenance of control panels of common protection , main hoist aux . hoist , long travel , cross travel , resistance box , cross rails and trolleys , long rails and trolleys associated cables , motor terminals and slip rings master controllers , limit switches , thyrister brake motor / coil , junction boxes etc . general checking of one or both cranes . , maintenance of any of the sub assemblies as per the description of job mentioned in the detailed scope of work ( annexure-ii ) , eot crane maintenance ( 5 t , 5t , tackle ) preventive and breakdown maintenance of 5t ( wmi ) , 5t ( floatation ) , and tackle crane ( filtration ) . job includes maintenance of control panel of hoist long travel , cross travel , resistance box , cross rails and trolleys , long rails and trolleys , associated cables , motor terminals and slip rings , limit switches , master controllers . pushbuttons thruster break coil / motor etc . note:- each attempt would have a duration of 02 hours for preventive maintenance & in case of breakdown actual time till the fault is cleared shall be taken into account . , oil circuit breaker maintenancethe job includes complete general maintenance of oil circuit breaker of the transformers , cleaning of ocb , connection checking , insulator checking with their operation mechanism manual/electric , oil level checking , oil testing , removal of any oil leakage faults . , mcc & motor ce box maintenancepreventive and breakdown maintenance of motors , mcc starter panels , control & power cables , connections and disconnection of motors , starters , slip ring & exciter for following items:a ) 225 hp to 500hp , mcc & motor ce box maintenancepreventive and breakdown maintenance of motors , mcc starter panels , control & power cables , connections and disconnection of motors , starters , slip ring & exciter for following items:b ) 100 hp to 220hp , mcc & motor ce box maintenancepreventive and breakdown maintenance of motors , mcc starter panels , control & power cables , connections and disconnection of motors , starters , slip ring & exciter for following items:c ) 25hp to 90hp , mcc & motor ce box maintenancepreventive and breakdown maintenance of motors , mcc starter panels , control & power cables , connections and disconnection of motors , starters , slip ring & exciter for following items:d ) 7 . 5hp to 20hp , mcc & motor ce box maintenancepreventive and breakdown maintenance of motors , mcc starter panels , control & power cables , connections and disconnection of motors , starters , slip ring & exciter for following items:e ) 0 . 5hp to 5hp , repairing of lighting & power distribution panels . job involves checking , dedusting cleaning of panel components , replacing /repairing existing switches fuse bases including wiring , strengthening /repair of base supports , sheds doors etc . and rewiring for load balancing , replacement/repair of other auxiliary components like terminals , indications etc . , dismantling & re fixing of old light fittings job includes removing , repairing . cleaning & refixing with the help of gitties , ms brackets , pipes etc . and finally commissioning of the following with proper wiring/cabling and dressing:i ) tube light fittings both single and double tube rod , dismantling & re fixing of old light fittings job includes removing , repairing . cleaning & refixing with the help of gitties , ms brackets , pipes etc . and finally commissioning of the following with proper wiring/cabling and dressing:ii ) industrial type hpmv/ hpsv fittings 70 w to 400 w , 220 volts . /led light fittings , installation of new light fittings job includes installation & commissioning of tube light fittings , led fittings , preparing support from ms angles , pipes , and clamps are included in the scope of work . , wiring/ cablingjob involves removing the old/ faulty cables/conduit & replacing new cables in its place up to 2 . 5 mm2 , 04 core . job also includes clamping , dressing the cable & termination at supply/light fittings . , tracing and rectification of light circuit faults . job includes tracing of the lighting circuit faults like burning / opening of joints , faults in lamps , holders , short circuits , supply missing etc . , shifting of motors , electrical panels etc as per detail in the scope of work . , unskilled assistance job as per detail in scope of work: cleaning of grinding section mcc , unskilled assistance job as per detail in scope of work:cleaning of crushing section mcc , unskilled assistance job as per detail in scope of work: cleaning of filtration section mcc , unskilled assistance job as per detail in scope of work: cleaning of cooling tower mcc , unskilled assistance job as per detail in scope of work: cleaning of transformer room , unskilled assistance job as per detail in scope of work: cleaning of cable tray and cable trench