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| 1 | Supply,installation,testing & commissioning of 11 KV Outdoor type extensibleRMU floor mounted with internal eletrolytic grade copper bus bars, consisting of combinations of 630 Amp 2 Nos. fixed manual Load Break Switch as outgoing & 1 Nos. fixed type manual Vacuum Circuit Breaker as incommer. All live parts, bus bars, LBSs connections of RMU shall be enclosed to avoid multiple interconnections & sealed for life robotically welded non magnetic and non ferrite grade stainless steel tank Grade 304 of minimum 2.5 mm thick having IP67 degree of protection filled with SF6 gas as insulation with leakage rate less than 0.1% per year tested as per IEC 62271-200. The unit shall have front cable entry for ease of installation and shall have site replaceable bushings for ease of troubleshooting during breakdown.RMU shouldbe complete with all accessories such as Terminal boots, VPIS, cable supports, all front cable terminations, mechanical indications for Load break switch ON/OFF, Manometer as per with IEC standards 62271-200, 60056, 60129, 60265, 60298, 60420, 60529 and 60694. Altitude of installation up to 1000m as per IEC 60120. Extensible Bushings,if applicable shall be bolted type top mounted outside the tank for connection of external bus bar .Also, the outer enclosure shall cover the full length of the switchgear,to ensure IP3X+IP54 protection for cable boxes . RMU should be The unit shall be internal arc proof 21kA for 1 sec. for tank+Cable Box ,and tested and totally safe for human beings. The gas release & personnel safety with internal arc proof shall not depend on plinth design in and incuding the following :- |
| 2 | The configuration of the RMU will be 1 VCB (One VCB) as incomer and 2 LBS (Two LBS)as outgoing |
| 3 | (a) The Vacuum Bottle shall be of same make as that of RMU to ensure better life cycle optimization for the RMU. |
| 4 | (b)The Manufacturer shall furnish performance Certificate for similar kind of RMUs in their own legal Name . Any Joint venture certificates / partnership with other firms shall not be considered. |
| 5 | (c ) RMUs, VCB Panels,Outdoor PCVCBs,CRP shall be from one same Manufacturer to ensure ease of maintanance after expiry of warranty period. |
| 6 | (d) The unit shall include the following with all necessary standard fitting required at site. |
| 7 | (e) 630A Load Break Switch module for makingof fault current alongwith Earth Switch of full making capacityShort time withstand current - 21KA/ 3 secMaking Capacity - 52.5kApAuxiliary contacts - 1NO + 1NCPower frequency withstand voltage - 38kVImpulse withstand voltage - 95kVNominal operating gas pressure - 1.2 Bar abs.Front cover mechanism - IP2XCable covers - 3X Fault Passage Indicator-01 SetSnap action mechanism for manual operation and pad-lockableCable box for front termination of the cable suitable upto 3 core 300 Sqmm,11 KV XLPE cableRight angle non-touch proof Termination boots - 1 Set (R,Y,B) |
| 8 | (f) 630A VCB module for making& breaking of fault current alongwith Earth Swicth of full making capacity Manual operated 630 A Vacuum circuit breaker having spring stored mechanism.Three position disconnector/earthing switch downstream vacuum circuit-breaker with pad-locking feature. |
| 9 | (g) Three position single spring mechanism for disconnector/earthing switch with pad-locking feature. |
| 10 | (h) “Live Cable” LED Indicators thru Capacitor Voltage Dividers mounted on the bushings. |
| 11 | (j) Short time breaking current - 21KA/ 3 sec |
| 12 | (k) Making Capacity - 52.5 kAp |
| 13 | (l) Auxiliary contacts - 1NO + 1NC |
| 14 | (m) Power frequency withstand voltage - 38KV |
| 15 | (n) Impulse withstand voltage - 98KV |
| 16 | (o) Nominal operating gas pressure - 1.2 Bar abs. |
| 17 | (p) Front cover mechanism - IP2X |
| 18 | (q) Cable covers - 3X |
| 19 | (r ) Green(ON)/Red(OFF) push buttons to operate VCB. |
| 20 | (s) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault. |
| 21 | (t)Resin cast ring core protection CT plate mounted type : 100/5-5 A, 5P10, 2.5 VA - 3 Nos |
| 22 | (u) Mechanical ON/OFF/EARTH/Spring charge Indication |
| 23 | (v) Cable boxes should be Arc Proofinterlocked with respective Earthing Switches. |
| 24 | (w) Right angle non-touch proof Termination boots - 1 Set (R,Y,B). |
| 25 | Make : ABB, Siemens, Schneider. |
| 26 | Note : - RMU shall be placed on PCC plateform of size and design recommended by manufacturer and the cost of the same shall be deemed to be included in unit quoted rates. |
| 27 | Supply & Installation of 11 KV Outdoor type extensible Ring Main unit (RMU) floor mounted with internal copper bus bars consisting of combinations of 630 Amp 3 Nos. fixed manual Load Break Switch as outgoing & 1 Nos. fixed type manual Vacuum Circuit Breakeras incommer, fixed type manual Vacuum Circuit Breaker All live parts, bus bars, LBSs, VCBs connections of RMU should be enclosed in Stainless Steel tank & sealed for life robotically welded non magnetic and non ferrite 304 grade stainless steel tank of 3 +/-0.5mm thick having IP67 degree of protection filled with gas as insulation with leakage rate less than 0.1% per year tested as per IEC 62271-200. RMU shall have solid earthing system. The earthing busbar shall be provided throughout the length of switchgear & shall be provided in each cable compartment. RMU shouldcomplete with all accessories such as Terminal boots, VPIS, cable supports, mechanical indications for Load break switch ON/OFF, VCB ON/OFF, Spring charge, Manometer as per with IEC standards 62271-200, 60056, 60129, 60265, 60298, 60420, 60529 and 60694. Altitude of installation up to 1000m as per IEC 60120. Internal arc type tested for AFLR 20kA for 1 sec with gas release provision from top side. Bushings bolted type mounted outside the tank for connection of external bus bar. The complete enclouser of RMU shall be of IP54. The outer door of enclouser shall cover entire front part of the switchgear including cable compartment in and including the following:- |
| 28 | The configuration of the RMU will 1 VCB (One VCB)as incomer and 3 LBS (Three LBS) as outgoing |
| 29 | Each Vacuum Circuit Breaker module should consist of following accessories :- |
| 30 | (a) 630A Vacuum circuit breakermodule with vacuum circuit breaker, three position isolator/earthing switch, busbars, interlocking, earthbar and stored spring energy mechanism |
| 31 | (b) Short time current - 21KA/ 3 sec |
| 32 | (c )Making Capacity - 50KA |
| 33 | (d) Power frequency withstand voltage - 28KV |
| 34 | (e) Impulse withstand voltage - 75KV |
| 35 | (f) Nominal operating gas pressure - 1.4 Bar abs. |
| 36 | (g) Front cover mechanism - IP2X |
| 37 | (h) Cable covers - 3X with outer enclouser IP54 |
| 38 | (j) Stored energy mechanical for manual operation |
| 39 | (k) Cable box for front termination of the cable suitable upto 3 core 300 Sqmm, 11 KV XLPE cable |
| 40 | (l) Right angle boots (push on type) |
| 41 | (m) Arc proof cable covers with self Interlocking mechanism with earth switch |
| 42 | (n)Capacitive voltage indication fixed type system as per IEC61243 |
| 43 | (o)Mechanical Indications for Load break switch ON, OFF, EARTH |
| 44 | (p)Self Powered Over Current and Earth Fault protection relay |
| 45 | (q) Ring core current transformer with suitable ratio 100/5-5, 2.5VA, 10P10 for protection |
| 46 | (r )Make of Vacuum Interrptor and RMU Manufacturer should be same |
| 47 | (s) 630A Load Break Switch module for makingof fault current alongwith Earth Switch of full making capacityShort time withstand current - 21KA/ 3 secMaking Capacity - 52.5kApAuxiliary contacts - 1NO + 1NCPower frequency withstand voltage - 38kVImpulse withstand voltage - 95kVNominal operating gas pressure - 1.4 Bar abs.Front cover mechanism - IP2XCable covers - 3XFault Passage Indicator-01 SetSnap action mechanism for manual operation and pad-lockableCable box for front termination of the cable suitable upto 3 core 300 Sqmm,11 KV XLPE cableRight angle non-touch proof Termination boots - 1 Set (R,Y,B) |
| 48 | Make : ABB, Siemens, Schneider. |
| 49 | Note : - RMU shall be placed on PCC plateform of size and design recommended by manufacturer and the cost of the same shall be deemed to be included in unit quoted rates. |
| 50 | Material and labour for providing cement concrete 1:4:8 type D-2 (using 40 mm graded crushed stone aggregate) as in foundation fillingcomplete all as specified and directed by Engr in charge. |
| 51 | Material and labour for providing cement concrete 1:2:4 type B-1 (using 20 mm graded crushed stone aggregate) for coping of poles/plateform of transformers including necessary form work and finished the surface complete all as specified and directed by Engr in charge. |
| 52 | S&F for the Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthling etc. as required 32x6mm dia galvanised iron strip all as directed. |
| 53 | M & L for Earthing complete with galvanised steel earth plate electrode 60 cm x60 cm x 6 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level ,connected to and including galvanised iron earth wire 32 X 6 mm by means ofnut, bolts, check nuts and washers of galvanised iron or steel and provision of charcoal dust and common salt packed all around the earth plate including necessary excavation and earth work in any type of soil and testing complete all as specified and directed and shown in electrical plate number 5 of MES SSR part-I(1991)(a) Excavation and earth work for drilling hole for electrode in any type of Soil.(b) PCC pit in cement concrete 1:2:4 type B-1, Pre cast RCC cover with suitable handle 40 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than1.87 Kg/ Sq meter.(c) Funnel with watering pipe of GI 20 mm nominal bore light grade and lugs etc complete all as specified and directed(d) 50 mm nominal bore medium grade GI protection pipe 5 meter long for protection of earthing lead complete all as specified and directed.(e) Requisite quantity of common salt and charcoal.(f) Testing of earthing. |
| 54 | Taking out the old unsv HT cable after disconnecting from over head lineand panel rated voltage of 11000 Voltsfrom trenches, pole etc complete all as specified and directed |
| 55 | M&L for relaying of old existing cable retrived fromthe same after, jointing or necessary repair work and testing XLPE insulated PVC outer seathed and PVC inner sheath, galvanised steel strips armoured,and reconnecting the cable from over head lineand panelsuitable for rated voltage of 11000 Volts grade Earthed system of size 95/120sqmm 3 Coreand laid in treches/ducts/pipe or on road/pole all as required and directed at site. Note: excavation and earth work joints will be measured and paid seprately |
| 56 | Supply,laying and connecting in trenches/fixed to pole/under floor in pipe XLPE insulated, screened, PVC bedded steel strip armoured heavy duty electric cablefor 11KV earthed system of cross sectional area95 Sq mm 3 core all as specified and directed. |
| 57 | Taking down, disconnecting of existing transformer any capacity on 04 pole structure withHT cablecomplete removing and shifting of Transformer and provision ofsuitable sizePCC foundation for transformer,chain link fencing 4x4x2.8Mtr Height with Angle Iron Post 65x65x6mm,steel Gate with locking arrangement and pebbles/aggregate filling 100mm around 1.5mtrTransformer foundationincluded the transportation all as directed by Engr incharge. |
| 58 | Supply and fix for cable jointing kit for 11 KV grade cable for indoor terminationheat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size95 sqmm |
| 59 | Supply and fix for cable jointing kit for 11 KV grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 coreXLPE, armoured, Al conductor cable of size95 Sqmm |
| 60 | Supply and fix for cable jointing kit for 11 KV grade cable for out door terminationheat shrink type joint complete with jointing material and accessories suitable for 3 coreXLPE, armoured, Al conductor cable of size95 Sqmm |
| 61 | Taking down cross arms, channels, angle iron, clamps, nut, bolts, stay wire, , GI wire,anti climbing devices, etc complete all as speicified and directed by Engineer-in-Charge. |
| 62 | Dismantling & taking down GO switch off size including insulators, operating mechanism etc complete from any position. |
| 63 | Taking down insulators off size & type |
| 64 | Dismantling & taking down existing ACSR conductor of any size by opening the binding wire from HT / LT electric poles complete all as directed. |
| 65 | Taking out existing PCC HT electric poles of any length including breaking of cement concrete, foundation and necessary excavation and earth work, removal of debris etc complete all as directed. |
| 66 | Taking down, disconnecting of unserviceable OCB (Oil Circuit breaker)withHT cable any size complete removing and shifting of OCB and handover to E & M store all as directed by Engr in Charge. Note : -OCB Transportation the cost of the same shall be deemed to be included in unit quoted rates. |
| 67 | Excavation in trenches, n exc 1.5m wide and n exc 1.5m in depth , for foundation, etc or for shafts, wells, cesspits, manholes, pier holes, laying of cables etc. n exc 10sqm on plan and n exc 1.5m in depth and getting out in soft/loose soil complete all as directed at site. |
| 68 | Removing excavated material to a distance n exc 50m and depositing where directed at a level n exc 1.5m above the starting point complete all as specified and as directed. |
| 69 | Returning , filling in, including spreading, leveling, watering and well ramming in layers not exc 25 cm complete all as specified and as directed. |
| 70 | M&L for tibba Sand cushioning to under ground cable in trenches/existing cable trenches/ductsin layers of 8 cm deep before laying the cable and 15 cm deep after laying and stretching the cable complete all as specified and directed by Engr in charge.Note : Punned down thickness shall be measured as directed. |
| 71 | Supplying and laying un-reinforced precast concrete cable cover,class HV, Type 1, flat, size 300mm x l80mm x 40mm, ISI marked complete all as directed at site |
