PROVISION OF RING MAIN UNIT (RMU) AND ALLIED WORKS AT TECH AREA AT AFS JAISALMER

Amount

Supply,installation,testing & commissioning of 11 KV Outdoor type extensible RMU 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 should be 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 :-

The configuration of the RMU will 1 VCB as incomer and 2 LBS as outgoing (a) The Vacuum Bottle shall be of same make as that of RMU to ensure better life cycle optimization for the RMU. (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. (c ) RMUs, VCB Panels,Outdoor PCVCBs,CRP shall be from one same Manufacturer to ensure ease of maintanance after expiry of warranty period. (d) The unit shall include the following with all necessary standard fitting required at site. (e) 630A Load Break Switch module for making of fault current alongwith Earth Switch of full making capacity Short time withstand current - 21KA/ 3 sec Making Capacity - 52.5kAp Auxiliary contacts - 1NO + 1NC Power frequency withstand voltage - 38kV Impulse withstand voltage - 95kV Nominal operating gas pressure - 1.2 Bar abs. Front cover mechanism - IP2X Cable covers - 3X Snap action mechanism for manual operation and pad-lockable Cable box for front termination of the cable suitable upto 3 core 300 Sqmm, 11 KV XLPE cable Right angle non-touch proof Termination boots - 1 Set (R,Y,B) (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. (g) Three position single spring mechanism for disconnector/earthing switch with pad-locking feature. (h) “Live Cable” LED Indicators thru Capacitor Voltage Dividers mounted on the bushings. (j) Short time breaking current - 21KA/ 3 sec (k) Making Capacity - 52.5 kA (l) Auxiliary contacts - 1NO + 1NC (m) Power frequency withstand voltage - 38KV (n) Impulse withstand voltage - 98KV (o) Nominal operating gas pressure - 1.2 Bar abs. (p) Front cover mechanism - IP2X (q) Cable covers - 3X (r ) Green(ON)/Red(OFF) push buttons to operate VCB. (s) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault. (t) Resin cast ring core protection CT plate mounted type : 100/5-5 A, 5P10, 2.5 VA - 3 Nos (u) Mechanical ON/OFF/EARTH/Spring charge Indication (v) Cable boxes should be Arc Proof interlocked with respective Earthing Switches. (w) Right angle non-touch proof Termination boots - 1 Set (R,Y,B). 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.

Supply,installation,testing & commissioning 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 Breaker as 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 should complete 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 :-

The configuration of the RMU will 1 VCB as incomer and 3 LBS as outgoing Each Vacuum Circuit Breaker module should consist of following accessories :- (a) 630A Vacuum circuit breaker module with vacuum circuit breaker, three position isolator/earthing switch, busbars, interlocking, earthbar and stored spring energy mechanism (b) Short time current - 21KA/ 3 sec (c ) Making Capacity - 50KA (d) Power frequency withstand voltage - 28KV (e) Impulse withstand voltage - 75KV (f) Nominal operating gas pressure - 1.4 Bar abs (g) Front cover mechanism - IP2X (h) Cable covers - 3X with outer enclouser IP54 (j) Stored energy mechanical for manual operation (k) Cable box for front termination of the cable suitable upto 3 core 300 Sqmm, 11 KV XLPE cable (l) Right angle boots (push on type) (m) Arc proof cable covers with self Interlocking mechanism with earth switch (n) Capacitive voltage indication fixed type system as per IEC61243 (o) Mechanical Indications for Load break switch ON, OFF, EARTH (p) Self Powered Over Current and Earth Fault protection relay (q) Ring core current transformer with suitable ratio 100/5-5, 2.5VA, 10P10 for protection (r ) Make of Vacuum Interrptor and RMU Manufacturer should be same

(s) 630A Load Break Switch module for making of fault current alongwith Earth Switch of full making capacity Short time withstand current - 21KA/ 3 sec Making Capacity - 52.5kAp Auxiliary contacts - 1NO + 1NC Power frequency withstand voltage - 38kV Impulse withstand voltage - 95kV Nominal operating gas pressure - 1.4 Bar abs. Front cover mechanism - IP2X Cable covers - 3X Snap action mechanism for manual operation and pad-lockable Cable box for front termination of the cable suitable upto 3 core 300 Sqmm, 11 KV XLPE cable Right angle non-touch proof Termination boots - 1 Set (R,Y,B) 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.

M&L for providing cement concrete (1:4:8), type D-2 (using 40 mm graded crushed stone aggregate) as in foundation filling complete all as specified and directed by Engr in charge.

M&L for providing cement concrete (1:2:4), type B-1 (using 20 mm graded crushed stone aggregate) for coping of poles including necessary form work and finished the surface complete all as specified and directed by Engr in charge.

S&F 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.

Supply, laying jointing and testing under ground XLPE insulated, screwed, PVC bedded, galvanized steel strip or wire armoured electric power cable (heavy duty) with stranded aluminium conductor, 6.35 KV (UE/11 KV (E) grade earthed system of size 95 Sqmm 3 core confirming to IS laid in trenches, in floor, in duct, through pipes or along the pole complete all as specified and directed.

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 of nut, 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.

Supply, fixing and testing after jointing Cable Jointing Kit for 11 KV grade cable for indoor type termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armoured aluminum cable of size 95 sqmm 3 core.

Supply, fixing and testing & Cable Jointing Kit for 11 KV grade cable for outdoor termination heat shrinkable joint complete with jointing material and accessories suitable for XLPE armored aluminum cable of size 95 sqm 3 core.

Supply, laying, testing and commissioning of Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm to 120 sqmm

M&L for 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.

M&L for 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.

M&L for Returning , filling in, including spreading, leveling, watering and well ramming in layers not exc 25 cm complete all as specified and as directed.

M&L for tibba Sand cushioning to under ground cable in trenches/existing cable trenches/ducts in 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.

M&L for 40 to 50 mm thick rough dressed Jodhpur type stone slab 25 to 35 cm in width of 80 cm long laid dry abutting each other for protection to under ground cableall as specified and directed.

S&F galvanised pipe light grade of ISI marked 100 mm bore for passing of cable fixed to poles/walls/lay under floor complete with and including fittings as required compete all as specified and directed Engr-in-charge.

M&L for boring hole under the road / pavement / hard standing with the help of trenchless technology using ultra sound technique or mannually and necessary machine for inserting GI pipe of size 100/80 mm not less than one metre below ground level complete all as specified & directed by Engineer-in-charge.

SANJOLI CONSTRUCTION COMPANY

Anil Builders

SS SODHA ENTERPRISES

ESWARI ELECTRICALS PVT LTD