Tender For Special Repair And Replacement Of Old Unserviceable Ocb To Vcb And Connected Items At Ima Dehradun.; 1 Dismantling HT 11 Mtr SP 55 steel tubular four pole structure ,disconnecting the HT cables, earthing leads/strips incoming and outgoing HT cable of existing size, disconneting/ dismantling the complete GOD system of existing size and taking out the complete structure from the site of any type, lifting transporting the same to storeyard to keep four pole structure in safe custody complete all as specified and directed. 2 Dismantling HT 11 Mtr SP 55 steel tubular two pole structure ,disconnecting the HT cables, earthing leads/strips incoming and outgoing HT cable of existing size, disconneting/ dismantling the complete GOD system of existing size and taking out the complete structure from the site of any type, lifting transporting the same to storeyard to keep four pole structure in safe custody complete all as specified and directed. 3 Supply, installation, testing & commissioning of 11 KV of rating 630 Amps RMU unit outdoor type IP-54 protection duly painted (Paint shade in painted Alu Zn/RAL 7032 on sheet steel for door and covers), SF-6 gas insulated RMU (Ring Main Unit) four way comprising of two (02 Nos) numbers manually operated load break switch for incoming,Two (02 Nos)number Vacuum Circuit Breaker as outgoing, inside SF6 gas filled stainless steel (nonferrous and nonmagnetic grade) tank having minimum thickness 2.5 mm +/- 0.5 mm having IP-67 degree of protection internal are classified 21 KA/ 03 Sec for cable box and tank bothwith painting as per manufacturer specification & leak rate of SF-6 gas less than 0.1%, RMU should be provided with Copper Bus bar, one number fault passage indicator with each incoming and outgoing, mechanism for interlocking arrangements for powered relay complete with all accessories as under :-(a)RMU type installation Outdoor Extensible type, arc proof as per IEC:62271-200 for design, manufacturing and testing. The RMU must have the following features/specifications:- (i)Rated voltage upto - 12 KV. (ii) Rated power frequency withstand voltage - 28 KV. (iii) Rated lightning impulse with stand voltage - should be minimum75 KVP.(iv) Rated current for ring mainfeeder - 630 A. (v)Rated current for VCB feeder - 630 A. (vi)Rated short-time current - 21KA/3 Sec.(vii)Rated short making current - 52.5kA(viii)Ambient temperature - (-1 degree Celsius to +45 degree Celsius). 4 (ix) Degree of protection against accidental contact and ingress of foreign objects must be assured as under:-(a) SF 6 tank : IP-67. (ab) Out door enclosure IP 54.(x)Each load break Switches includes :-(aa) SF6 three position switches with position ON-OFF-EARTH, (ab)Manual operated spring mechanism ON-OFF-EARTH, (ac) Mechanical indicators for position ON-OFF-EARTH, (ad) Mimic diagram at the front facia of RMU, (ae)Capacitive Voltage indicator, (af)Padlocking facility, (ag)Fault passage indicator for Earth Fault.(xi) Each vacuum circuit Breacker includes :-(aa)Manual VCB with position ON-OFF manual spring charging mechnism with in built spiring charging handle, mechanically latched ON/OFF push buttons. (ab)Manual line disconnector with three posotion switches ON-OFF-EARTH, (ac)Numerical relay for Overcurrent and earth fault protection, (ae)Three phase definite time over current and short-circuit protection with variable tripping times (ANSI 50/51), 3 Phase over current protection with selectable inverse time characteristics and definite time short-circuit current) (ANSI 2021), definite, (af)Capacitive Voltage indicator, (ag) Padlocking facility, (ah)Dedicated CTs for protection.(xii)Operating handle - 1 number, (xii) Right angled Cable boots - 3x sets, (xiv)Capacitor(xv) Any Other standard accessories required for efficient operation and PCC foundation of RMU as per OEM recommendations. 5 Disconnecting the HT cables, earthing leads/strips of 11 KV OCBs and taking out the complete OCBs from the site of any type and capacity, lifting transporting the same to storeyard to keep OCBs in safe custody complete all as specified and directed. 6 Supply, installation, testing and commissioning of 11 KV, 630 Amps, 26.3 KA for 3 sec HT vacuum circuit breaker panel for incomer confirming to the IS 13118/1991, IEC 62271-100/200, IAC-AFLR- 25 KA for 1 sec, PM LSC-2B, front accessed comprising of the following equipments :- 7 (a) Min 630 Amps continuous rating copper bus bar droppers and bus bars with heat shrinkable PVC Sleeves. 8 (b) Truck mounted Floor rolling vacuum circuit breaker LK (L&T) equivalent in Siemens/Schneider withend sheet, castle lock and rear extension 9 (c) Motorised spring charging mechanism. 10 (d) Interpanel barrier to prevent arc propagation from one panel/compartment to other. 11 (e) Earthing truck rated for full making capacity with provision for safe and reliable position indicator. 12 (f) Cast resin current transformer, 11 KV, 100/50/5 ± 5 Amps having protection core class IP10, burden of 15 VA and breaking cap of 26.3 KA for 3.0 second - 03 Nos. 13 (g) Cast resin potential transformer, 11 KV/√3/110V/√3, 100 VA/CL 1.0 - 03 Nos with desired capacity PT fuses. 14 (h) Accessories like local remote selector switch, Breaker control switch (T-N-C) space heater with Thermostate DC and AC control Ckt protection through MCB, indicating LED lamps for RYB phases spring charged, DC supply healthy breaker ON/OFF, Breaker in service, Test, Disconnected Position, Annunciator window and hooter. 15 (j) Multifunction meter with RS 485 port. 16 (k) SCADA compatible numerical O/C & Earth fault relay type modbus RTU. 17 (l) Trip ckt supervision (ii) Master trip (ii) Auxiliary relay (iii) Arc flash supervision of circuit breaker (iv) cable and bus bar compartment. 18 (m) Anti pumping relay panel shall have following additional features:- 19 (n) Continuous rated closing/tripping coils. (ii) Integral spring charging handle. (iii) Fully internal arc tested (25 kA for 1 sec) as per latest IEC 62271-200 Norms. 20 (o) In built power pack 24 volt DC as required for protection relays and other equipments/systemr. 21 (p) Breaker shall be provided with following features:- 22 (i) Auxiliary switch with 6 NO + 6NC contacts mounted on the draw out portion of the switchgear. (ii) Position/ cell switch with 3 NO + 3 NC contacts one eact for TEST and SERVICE position. (iii) Auxiliary switch with 4 NO + 4 NC contacts mounted on the stationary portion of the operated mechanically by a sliding lever from the breaker in service position. 23 Supply, installation, testing and commissioning of 11 KV, 800 Amps, 26.3 KA for 3 sec HT vacuum circuit breaker panel for Bus coupler confirming to the IEC 62271-200, IAC-AFLR-25 KA for 1 sec, PM LSC-2B, front accessed comprising of the following equipments :- 24 (a) 800 Amps continuous rating copper bus bar. Droopers and busbars shall be Raychem insulated. 25 (b) Truck mounted Floor rolling vacuum circuit breaker LK (L&T) equivalent in Siemens/Schneider withend sheet, castle lock and rear extension 26 (c) Motorised spring charging mechanism. 27 (d) Interpanel barrier to prevent arc propagation from one panel/compartment to other. 28 (e) Earthing truck rated for full making capacity with provision for safe and reliable position indicator. 29 (f) Accessories like local remote selector switch, Breaker control switch (T-N-C) space heater with Thermostate DC and AC control Ckt protection through MCB, indicating LED lamps for RYB phases spring charged, DC supply healthy breaker ON/OFF, Breaker in service, Test, Disconnected Position. 30 (g) Antipumping relay panel shall have following additional features:- 31 (h) Continuous rated closing/tripping coils. (ii) Integral spring charging handle. (iii) Fully internal arc tested (25 kA for 1 sec) as per latest IEC 62271-200 Norms. (iv) Racking in/out, Manual closing/tripping of the CB with compartment door closed. 32 (j) Breaker shall be provided with following features:- 33 (i) Auxiliary switch with 6 NO + 6NC contacts mounted on the draw out porition of the switchgear. (ii) Position/ cell switch with 3 NO + 3 NC contacts one each for TEST and SERVICE position. (iii) Auxiliary switch with 4 NO + 4 NC contacts mounted on the stationary portion of the operated mechanically by a sliding lever from the breaker in service position. 34 Note for item No. 5 and 6:-(a) Electrical and mechanical interlocking between all incoming breaker and bus coupler to avoid double supply in outgoing breakers.(b) The VCB should be matched with existing VCB/OCBs including Adopter panel required for connection with existing panel, extension of bus bar and weather proof bus duct, nuts bolts and painting with colour etc as required at site complete all as specified and directed.(c) Contractor shall submit the drawing as per CA specification to Garrision Engineer before placing orders to original manufacturers of panels.(d) Minor items/parts required for making connections in respect of incoming outgoing and earthing etc are deemed to be included in the quoted rates by the contractor.(e) The VCB should be tested at site after insatallation with primary injection system according to the load of feeders and submit the test report of all VCB before pre commissioning in booklet form, cost of the same included in the quoted rate. 35 Supply, laying, jointing and testing cable XLPE insulated screened PVC bedded galvanizedsteel strip or wire armored, electric power cables (Heavy duty) 11000 volts grade with stranded aluminum conductor of cross sectional area 3 core 120 sq mm complete all as specified and directed. 36 Material and labour for cable jointing kit for 11 KV (Earthed) grade cable for indoor/outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sq mm complete all as specified and directed. 37 Material and labour for PCC 1:3:6 type C-1 using 20 mm graded crushed stone aggregate as in VCB fondation complete all as specified and directed. 38 Material & labour GI tube light grade 100 mm for protection ofUG cable including dismantling complete all as specified and directed. 39 Supply and fixing HT cable root indicator of cast iron embedded in PCC 1:3:6 type C-2 (using 20 mm graded stone aggregate) of size 100x100x200 mm foundation upto ground level including necessary earth work in any type of soil complete all as specified and directed. 40 Material and labour for earthing with steelearth plate electrode ofsize 60x60cmx6mm thick buried directly in ground to a depth not less than 2.25mtr deep below normal ground level with top edge of the earth plate not less than 1.5 mtr deep below normal ground level connected to galvanized iron strip of size 32 X 6mm as earthing lead by means of nuts, bolts and washers of steel after welding of GI strip to earth electrode to the full lenght of earth plate,40mm dia GI tubing light grade protection pipe upto test point, 20mm dia GI watering pipe with funnel and wire mesh, PCC pit 1:3:6 with pit cover of size 30X30cm made of RCC 1:3:6 with suitable handle,angle iron frame made of angle iron of size 40x40x4mm, adequate qty of charcoal dust and salt layers all around the earth plate,removal of surplus soil and returning filling in all as required at site including test point made out of steel plate of size 75x75x6mm fixed to wall all as specified in plate No 3 of SSR Part-I and directed. 41 Excavation in trenches n. exc. 1.5 mtr wide and n. exc. 1.5 mtr in depth in soft/lose soil for laying cable/taking out under ground cable, GI pipes and bricks laid under cable and getting out in soft/loose soil complete all as directed. 42 Returning, filling in trenches including spreading, leveling, watering and well ramming in layers n. exc. 25 cm thick in soft/lose soil after cable/pipes are laid and tested complete all as directed. 43 Removing the excavated soil to a distance n. exc. 50 mtr and depositing where directed at a level not exc. 1.5 mtr above the starting point complete all as directed. 44 Material and labour for sand cushioning to under ground cables 8 cm thick before laying the cable and 15 cm thick after laying, stretching and testing the cable complete all as directed. Note:- sand will be measured after punning 8 cm. 45 Material and labour for un-reinforced precast concrete cable cover HV type I, flat size 300 mm X 180 mm X 40 mm as protection to underground cable laid dry and flat adjoining each other complete all as directed.
