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| 1 | Supply , laying , jointing & testing of HT underground cable XLPE insulated,screened, PVC bedded, galvanisedsteel striporwire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts Earthed, with stranded compact aluminium conductor 11000 volts grade 95 sq mm 3 core confirming to IS:7098 (Part-II) with latest amendements, suitable for earthed system laid in duct/trench/along pole etc including making connection complete all as specified and directed. |
| 2 | Excavation in trenches n. exc. 1.5 mtr wide and not exceeding 1.5 mtr in depth for laying of underground cable and getting out in hard / dense soil complete all as specified and directed. |
| 3 | Returning, filling in, including spreading, levelling, watering and well ramming in layers not exc 25 cm complete all as specified and directed. |
| 4 | Removing excavated soil n exc. 50 m and depositing where directed at a level n exc. 1.5 m above the starting point complete all as specified and directed. |
| 5 | Supply and laying of factory made un-reinforced pre-cast concrete cover class HV, Type 1,flat,size 300mmx l80mm x 40mm laid in trenches for HT cable protection complete all as specified and directed. Note (1) HT PCC cable cover shall comply with IS 5820 (1970) and shall be marked with HT 11 KV on top. |
| 6 | M&L forsand cushioning with layer of sand 8 cm thick before laying of cable and 15 cm after lying of cable in trenches complete all as specified & directed. Note- Punned thickness of sand will be measured (18 cm) and paid under relevant item. |
| 7 | M&L for cable jointing kit for 11 KV (Earthed)grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm, 11000 Volts grade complete all as specified and directed. |
| 8 | M&L for cable jointing kit for 11 KV (Earthed)grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm, 11000 Volts grade complete all as specified and directed. |
| 9 | S & F GI pipe light grade 80mm bore for cable protection, fixed to pole/ alongwall/ floor/ under road/ across the drain or nallaha etc complete all as specified & directed. |
| 10 | M & L for cutting the road/hard standing to a size not exceedind75 cm in depth and 45 cm in width for protection of XLPE cable including making good so as to match with existing finishing with PCC(1:4:8) type D2 (using 40 mm graded stone aggregrate) for 100 mm thick on top including fair finishing complete all as specified & directed. |
| 11 | Supply, Installation, testing, and commissioning of 11 KV Extensible Outdoor duty (IP54 enclosure) SF6 gas insulated 3-way motor operated Ring Main Unit comprising of 2 Nos. 630Amps Load Break Switches and 1 No 630Amps Vacuum Circuit Breaker, cable termination from the front, breaking capacity 21KA/3sec (Internal Arc Classification ALF-R 21kA-1sec both for tank and cable box as per IEC 62271-200), enclosed in robotically welded stainless steel tank having IP67 Degree of Protection, leak rate of SF6 gas less than 0.1% and tested as per IEC 60056/60694/60298. The switchgear shall accommodate all the 3 modules in one tank. Protection CTs should be ring core type. Cable bushings should be replacable at site complete all as specified and directed.Note: Contractor shallsubmit the drawing with complete tech Specification for approval before manufacturing of the Panel.NOTE:- Others details:- System Particulars: for 3 way RMU(1)Nominal System Voltage : 11kV.(2) Voltage variation on supply side : +-10 %(3) Corresponding Highest System Voltage: 12kV.(4) Frequency : 50 Hz with +- 3 % tolerance(5) Transient condition : -20 % or + 10 % combined variation of Voltage and frequency.(6 )Number of Phase : 3 Phases. (7) Neutral earthling : Solidly earthed.primary (kV rms) : 28KV |
| 12 | (8) Fault level (minimum) kA /Sec : 21/3).9) Lightning Impulse Withstand Voltage (kVp) : 75(10) One minute dry/wet power frequency withstand voltage primary (kV rms) : 28KV(11) Rated Dynamic Withstand Current for 1 second duration (kAp) : 52.5KA(12) Successful operation at Altitude of 1630 MtrApplicable Standards:a) The design, manufacture and performance of the Ring Main Units shall comply with all currently applicable statutes, regulations and safety codes.Nothing in this specification shall be construed to relieve the bidder off his responsibilities.b) Unless otherwise specified, the Ring Main Units offered shall conform to the latest applicable, IEC 62271-100, IEC 62271-200.All live parts, bus bars, shall preferably be enclosed in one tank to avoid multiple inter connections & sealed for life robotically welded non magnetic and non ferrite grade stainless steel tank Grade SS304 of minimum 2.5 mm thickness and outer body of the RMU of minimum 3.15 mm thickness.The RMU shall be type tested for internal arc test of 21KA/1 sec AFLR as per IEC62271-200. The outer enclosure shall cover the full length of the switch gear, to ensure IP54 protection for full door covering of complete switchgear. The protection relay shall be for 3 OC + 1EF (IDMT Type) , MODBUS communication along with RS 485 Port . |
| 13 | RMU and Vaccum Interruptor shall be of same make. All the mechanical bushings should be replacable at site, to avoid dismantling RMU from site and carrying to OEM factory for rectification for the minor gas leakages from mechanical bushing, this is operational & maintenane point, cannot be deviated. No additional plate/ accessories to be add to achieve Internal Arc of the Cable of 21kA-1sec, in the able box camber. RMUs should be manufactured, inspected and invoiced from the OEM factory only; no licensee partner manufactered RMU is exceptable.SERVICE CONDITIONS(a) The SF6 gas filled 11 kV, 630 Amps, extensible type, Outdoor, SCADA compatible Motorized Ring Main Unit with Vacuum Circuit Breaker to be supplied against this specification shall be suitable for satisfactory continuous operation under the following tropical conditions, design ambient temperature (Degree C) 40 as per IEC.The unit shall include the following with all necessary standard fitting as required at site: a) Vacuum Circuit Breaker 12kV 630Amps 21kA-3sec and fault making type Earthing Switch with micro-processor based selfpowered 3 O/C + 1E/F relay fitted with fixed type voltage indicator device as per IEC 61958. Protection CTs suitable ratio 2.5VA burden (CT ratio shall be confirmed at time of drawing approval).-1 No. |
| 14 | b) Load Break Switch 12kV 630Amps 21kA-3sec with copper bus Bar and earth switch fitted with fixed type voltage indicator device as per IEC -2 Nos. for 3 wayNote: Standard mano meter -01 for each tank, Operating handle - 01, cable clamping provision (standard)-01 / for every cable entry suitable for 1RX3C cable upto 300Sqmm, Operation and maintenance manual - 01, RMU Foundation (Earth Work and PCC works) alongwith suitable size of frame for placing RMU on plinth is deemed to be included in the cost quoted, also contractor will submit the foundation drawing recommended by OEM for approval. Height of plinth should not be less than 0.5 mtrs from ground level. |
| 15 | Supply,installing,commissioning and testing in replacement of LT Panel outdoor type front and rear openableof dimension as per specified by manufacturer to accomodate the undermentioned items ,CPRI certified factory made cubical type weather and vermin proof fixed on and including ventilation and louvers arrangementwith angle iron frame of size 50mm x 50mm x 6mm, pedastial type and provided with four Nos of angle iron supports duly embedded in foundation by PCC 1:2:4 type B-1 using 20 mm graded stone aggregate and as directed at site fabricated out of 3.15 mm thick CRCA steel sheet including duly painted powder coated and keeping adequate working space inside of the box and double door handle includingfront mounted cabinet, rod operated locking arrangement wih keys & countersunk holes at bottom for base mounting brackets and sheet steel gland plates for cable entry, formed gasket arround doors as directed before manufacturing the panel including Bus bar of following capacity and type with stainless steel nut bolts washers and spares holes with nut bolts on each bus bar and duly coveredwith shrinkable PVC sleeves as per colour coding ieRed, Yellow,Blue and Black & mounted on DMC / epoxy insulator and making connection of cables with appropriate size of lugs and cable glands and also two No danger Notice plate fixed on panel & The panel shall be prewired with suitable size PVC insulated copper conductor cable not less than 2.5 sqmm, multistrandedcomplete all as specified and directed. |
| 16 | Note (a) The contractor shall submit the drawing of panels for approvalbefore manufacturing the panels.(b) All the ACB & MCCBs fixed in vertical ON/OFF positions(c) All existing cable of any size will be connected with suitable size of cable lugs ,steel glands, nut bolt etc as required at site and as directed(d) Cost of cable lugs, nut bolts, gland etc shall be deemed to be included in the above quoted rates.(e) Panels should be provided with lock of 2 key sets.The Panel housed with the following accessories:- INCOMING:-a) BusbarTPN, Copper, 800 Amps - 01 Set ( R Y B & N)(b)Incoming ACB 4 pole 630 Amp 50 KA microprocessor based alongwith Spreader terminals with adjustable thermal and magnetic setting Draw out type– 01 No(c) LED type Phase indicator lamp(RYB)= 03 Nosd)Ammeter Digital type CT operated, with selector switch and (CT ratio 800/5 )CTs -01 Sete)Volt Meter Digital type 0-500 V range, (With selector switch) - 01 SetAs outgoing :-a) MCCB 4 pole 250 Amp 36 KA alongwith Spreader terminals with adjustable thermal setting with (Ics= 100% Icu) – 02 Nos(b) MCCB 4 pole 200 Amp 36 KA alongwith Spreader terminals with adjustable thermal setting with (Ics= 100% Icu) – 01 Nos(c) MCCB 4 pole 160 Amp 36 KA alongwith Spreader terminals with adjustable thermal setting with (Ics= 100% Icu) – 02 Nos(d) MCB 40 Amps TPN415 volts 50 Hz 16 KA - 01 Nos(e) Three Phase Digital Timer switch astronomical type with suitable contactors & Fuse protection switches- ,Auto manual switch for timer operation mode and indicator lamp for timer circuits alongwith internal wiring complete- 01Nos |
| 17 | As outgoing :-a) MCCB 4 pole 250 Amp 36 KA alongwith Spreader terminals with adjustable thermal setting with (Ics= 100% Icu) – 02 Nos(b) MCCB 4 pole 200 Amp 36 KA alongwith Spreader terminals with adjustable thermal setting with (Ics= 100% Icu) – 01 Nos(c) MCCB 4 pole 160 Amp 36 KA alongwith Spreader terminals with adjustable thermal setting with (Ics= 100% Icu) – 02 Nos(d) MCB 40 Amps TPN415 volts 50 Hz 16 KA - 01 Nos(e) Three Phase Digital Timer switch astronomical type with suitable contactors & Fuse protection switches- ,Auto manual switch for timer operation mode and indicator lamp for timer circuits alongwith internal wiring complete- 01Nos |
| 18 | Dismantling of old unserviceable HT steel tubular Pole four pole structure with connected HT insulators accessories and fuse assembly of any description /size for installation of HT RMU Panelcomplete all as specified and directed. |
| 19 | M&L in repair/replacement for earthingcomplete with using galvanized mild steel earth plate (electrode) 600 mmx 600 mmx 6.0 mm thick buried directly in ground, earth pit not less than 2.25 mtr deep below ground level with top edge of the earth plate not less than 1.50 m below ground level and earth plate surrounded with adequate quantity of charcoal dust mixed with salt to a packed thickness of 15 cm all round the plateusing 32X6 mmGI earth strip as earth lead moulded and riveted to earthplate at one end and connected to main equipment at switch/control board at another end, GI earth leadincased in and including 50 mm dia GI ‘light grade’ pipe from upper end of earth plate upto equipment with & including 20 mm dia bore GI pipe ‘light grade’ as water pipe from earth chamber to upper edge of the earth plate,GI funnel with wire mesh fixed on water pipe and provision of PCC 1:2:4 type B1(using 20 mm graded stone agg) as in pits chamber and RCC pit cover 50 mmthick of precast RCC 1:2:4 type B-1 (using 20 mm graded stone agg) complete all specified and directed. |
