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| 1 | Excavation in trenches in soft/loose soilnot exceeding 1.5 mtr wide andnot exceeding 1.5 mtr indeep and getting out for laying of cable/ pipes etc including forming bottom surfaces to the required level/slope complete all as specified and directed. |
| 2 | Returning , fillingin includiing spreading levelling, watering and well ramming in layers not exceeding 25 cm thick insoilcomlete all as specified and directed. |
| 3 | Removing surplus excavatedto a distance not exc 50 mtr and depositing where directed at level not exc 1.5mtr above the starting point complete all as specified and directed. |
| 4 | Material and labour for approved river sand cushioning for under ground cable in trenches 8 cm before laying and 15cm after laying of cable and punned thickness of sand shall be measured and paid for 18 cm only after punned /consolidated thickness complete all as specified and directed. |
| 5 | Supplying and laying un-reinforced precast concrete cable cover, class HV, Type-2, flat,size 450mm x 180mm x 40mm, ISI marked, laid flat across the cable lengthfor cable protection embossed with HT 11 KV electric on the top surface complete all as specified and directed. |
| 6 | Supply, installation, testing and commissioning of 11 KV Outdoor type RMU extensible IP54 floor mounted with internal copper bus bars, consisting of fixed type Motorised Vacuum Circuit Breakers-02 Nos as incomer, andfixed type Motorised Vacuum Circuit Breakers-03 Nos as outgoing along with air insulated metering module.All live parts, bus barsof RMU should be enclosed in tankto avoid multiple inter connections & sealed for life robotically for three sides and one side manual welded non magnetic / non ferrite / stainless steel tank Grade 304 of minimum 2.5 mm thick having IP 67 degree of protection filled with SF6 gas to fulfill the requirementas per IEC 60376, 60376 & 603760 B as insulation with leakage rate less than 0.1% per year tested as per IEC 62271-200 complete all as specified and directed.(AWC Area)(Make: ABB/Siemens/ Schnieder, Areva) |
| 7 | NOTE :- The unit shall have front cable entry for case of installation. RMU should becomplete with all accessories such as terminal boots, VPIS, cable supports all frontcable terminations, mechanical indications ON/OFF, Manometer as per with IECstandards 62271-200, 60056, 60129, 60265, 60298, 60420, 60529 and 60694.Altitude of installation up to 1000m as per IEC60120. The unit shall include thefollowing with all necessary standard fitting required at site. RMU should be testedfor an internal arc fault of 21KA for 1 sec as per IEC62271-200 and paint shade andthickness should be as per AIS 632 IS – 5 complete all as specified and as directed.The outer enclosure shall cover the full length of the switch gear, to ensure IP55protection for full door covering of complete switchgear. (a) 2Nos. Incomer & 2 Nos outgoing :- (i) 630A Vacuum Circuit breaker module for making and breaking of fault currentalong with Earth switch of full making capacity. (ii) Short time breaking current-21 KA/ 3 sec Making capacity-52.5 KA(iii) Internal ARC-21KA/1 sec (iv)Nominal operating gas pressure – 1.3(minimum) bar abs(v) Power frequency withstand voltage-28KV(vi)Impulse withstand voltage-75KV (vii) Outdoor Enclosure –IP54(viii) Front covermechanism-IP2X (ix) Cable covers – 3X (x) Stored energy mechanism for motor operation -24VDC(xi) Cable box for front termination of the cable suitable upto 3 core 400 Sqmm, 11KVXLPE cable(xii) Operation counter(xiii) Self-powered microprocessor based relay (3 O/C & E/F) with RS485 port andwith standard setting –ADR241S (xiv) Digital multifunction meter (A,V,KW,F,PF) with RS 485 port type Rishabh/Elmeasure (not applicable for bus coupler VCB)(xv) Protection CT-50-100/1A, CI-5P10, 2.5VA burden (not applicable for bus couplerVCB) (xvi) Metering CT-50-100/1A, CI-10, 2.5 VA burden(not applicable for bus couplerVCB)(xvii)Suitable site replaceable cables bushings(xviii) Arc proof cable covers with self interlocking mechanism between doors, earthswitch, disconnector &VCB (xix) Capacitive voltage indication fixed type system (xx) Mechanical indication for breaker ON, OFF,EARTH< TRIP, spring charged- discharged |
| 8 | b) Direct cable module -1 No :-(i) 630A vacuum circuit breaker module (ii) Short time current -21KA/3 sec(iii) Internal arc -21KA/1sec(iv) Nominal operation gas pressure -1.3(minimum) bar abs (v) Power frequency withstand voltage -28KV (vi)Impulse withstand voltage -75KV(vii) Outdoor enclosure –IP54 (viii) Front cover mechanism –IP2X(ix) Cable cover -3X (x) Stored energy mechanism for motot operation -24VDC (xi) Cable box for fornt termination of the cable suitable upto 3 core 400Sqmm, 11KVXLPE cable(xii) Suitable site replaceable cable bushings(xiii) Arc proof cable covers with self interlocking mechanism between doors, earth,switch, disconnector &VCB(xiv) Capacitive voltage indication fixed type system (xv) Mechanical indication for breaker ON, OFF, EARTH, TRIP, Spring charged -Discharged(C) Bus Connected PT Unit-1Nofor Metering consisting of following :-(i) Type M: Air insulated metering module 12KV, 630A, 21 KA for 1 sec -3 voltagetransformers of the ratio 11KV/V3/ 110 V/V3, 50 VA, class 1.0 with HT fuses vonprimaryside and MCB on secondary side. (ii) 1 LED illumination (iii) 1 space heater with thermostat (iv) RYB phase indications (v) 1 no digital voltmeterd) 2x12 V battery with battery charge with suitable burden for motor operationinput 230V AC & output 24 V DC. (e) Capacitive voltage indication fixed type VPIS 9-15 KV (f) Necessary interlocking arrangement for safety and operations (g) One no. operation handle for manual operation (h) One no. manometer (i) Safety interlocks shall be provided as per relevant IEC/IS standards andmanufacturers direction. |
| 9 | (k) Above switchgear shall conform to all relevant IEC/IS standards (l) Manual operation of vacuum circuit breaker should be possible withoutdismantling the motor from RMU. The motor should be filled in such a way that itshould not be outside front covers of RMU. (m) Operation and instruction manual with drawing -01 set(n) All cable bushing should be replaceable type (o) Module should be accommodated as per manufacture design (p) RMU cable box shall be front accessible type to have easy access to protectionand metering CTs. (q) Master trip relay, auxiliary relays for transformer fault (Buchhloz’s relay alarmtrip, oil and winding temp - only for 2 nos outgoing VCB (r) 12 Window display for OTI, WTI, Buchollz, trip and alarm etc – only for 2nosoutgoing VCB (s) Local remote switch (t) Hooter – 2nos (u) Auxiliary power supply – single phase auxiliary transformer-11KV/230V AC forinput to battery charger (v) Connection between cables riser panel & coupler VCB shall be cable connectedusing touch proof kits and same shall be done by OEM only as per theirrecommended guidelines (w) Vacuum interrupter should be of same make. Cable box should be are proof withboiled door and interlocked with respective earthing switches Doors should beremovable for case access to terminate cables. NOTE :- Rate quoted by the firm for this item should include the cost of thefollowing :- (i) PCC work/ any civil work for foundation required for errection of VCB and otheraccessories all as standard norms. (ii) contractor shall submit type test certificate to the Engg-in- charge/GEfor approval for placing the order. (iii) The contractor will be submitted the NABL accredited lab test reports of theRMU’s in original and the same shall be produced well before claiming RAR paymentof the RMU. (iv) RMU shall be inspected by inspecting officer nominated by Accepting Officer for testing and inspection at manufacturers factory and all routine test pertaining to IS shall becarried out before dispatching of RMU. (v) Pre commissioningSEI inspection shall be carried out after installation of RMU. |
| 10 | Supply , laying and testing cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) conforming to latest relevant IS with multy stranded aluminium conductor, 11000 volts grade of size 3 core 120 mmcable laid in trenches/ducts/under plinth floor passing through pipe etc, fixed on wall complete all as specified anddirected. |
| 11 | Supply and fix cable jointing kit for 11 KV grade (E) cable for outdoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size120 sqmm complete all as specified and directed. .Make : 3 M/Denson/M seal |
| 12 | Supply and fix cable jointing kit for 11 KV grade (E) cable for indoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size120 sqmm complete all as specified and directed.Make : 3 M/DENSON/M seal |
| 13 | M&L for earthing complete with steel earth plate eletrode 60cm x 60cm x6mm thick buried dirctly in ground vertically (earth pit not less than 2.25 mtr below ground level) with top edge of plat not less than 1.5 mtr below ground level connected to GI strip 32x6mm by means of bolts. nuts,check nuts and washers etc including protection pipe 15mm dia up to 7.5m length , provision the earth lead to earth connectionin ther main distribution box with lugs and GI nuts,bolts, earthing shall bedone all as per shown electrical plate No 5 of SSR part 1 Including neccessary excavation in disintergratedandhard soiland 20mm dia GI pipe withfunel for wateringPCC earth chamber 100mm thick precast RCC cover with suitable precast RCC frame and earth test point and testing in presence of Engr -in -Charge. |
