SPECIAL REPAIR/REPLACEMENT OF OLD TWO POLE/FOUR POLE STRUCTURE INTO RMU (RING MAIN UNIT) AND OTHER ALLIED ELECTRICAL CONNECTED WORKS (POCKET 1) AT LICHUBARI AND ROWRIAH IN JORHAT MIL STN UNDER GE JORHAT. ; 1 Supply, install, testing and commissioning of HT 11 KV, 3 Phase, 50Hz, totally enclosed metal clad SF6 switchgear having rupturing capacity upto 630 Amps, Outdoor Non-Extensible Fixed Type (IP54), RMU (Ring main unit)5 Way comprising of 03 Nos 630 Amps, manually operated Load Break Switch & 02 Nos. manual charging fixed-type Vacuum Circuit Breaker, inside robotically welded stainless steel 304 (Non Ferrite Non Megnetic Grade) tank having min. thickness 2.5 mm with IP 67 Degree of Protection and enhanced BIL of 75kVp internally to manage voltage surges. RMU should be provided with internal busbars, as well as earthing busbars of electrolytic grade copper, padlock provisions & complete with all accessories. The RMU shall be type tested for Internal arc test of AFL 21kA/1 sec for tank as per IEC62271-200.RMU shall have on-site-repairability features such as site replacable bushing/ coupling/ mechanism and gas refilling at site. The earthing busbar shall be provided inside each cable compartment for soilid earthing of Cable sheilds. The outer hinged main door should cover entire front of switchgear including cable doors for providing fail-safe protection. The unit shall include the following with all necessary standard fitting as required at site.OEM Make: ABB, Schinder Infrastructure, Siemens 2 Supply, install, testing and commissioning of HT 11 KV, 3 Phase, 50Hz, totally enclosed metal clad SF6 switchgear having rupturing capacity upto 630 Amps, Outdoor Non-Extensible Fixed Type (IP54), RMU (Ring main unit)4 Way comprising of 02 Nos 630 Amps, manually operated Load Break Switch & 02 Nos. manual charging fixed-type Vacuum Circuit Breaker, inside robotically welded stainless steel 304 (Non Ferrite Non Megnetic Grade) tank having min. thickness 2.5 mm with IP 67 Degree of Protection and enhanced BIL of 75kVp internally to manage voltage surges. RMU should be provided with internal busbars, as well as earthing busbars of electrolytic grade copper, padlock provisions & complete with all accessories. The RMU shall be type tested for Internal arc test of AFL 21kA/1 sec for tank as per IEC62271-200.RMU shall have on-site-repairability features such as site replacable bushing/ coupling/ mechanism and gas refilling at site. The earthing busbar shall be provided inside each cable compartment for soilid earthing of Cable sheilds. The outer hinged main door should cover entire front of switchgear including cable doors for providing fail-safe protection. The unit shall include the following with all necessary standard fitting as required at site.OEM Make: ABB, Schinder Infrastructure, Siemens 3 Supply, install, testing and commissioning of HT 11 KV, 3 Phase, 50Hz, totally enclosed metal clad SF6 switchgear having rupturing capacity upto 630 Amps, Outdoor Non-Extensible Fixed Type (IP54), RMU (Ring main unit)3 Way comprising of 02 Nos 630 Amps, manually operated Load Break Switch & 01 Nos. manual charging fixed-type Vacuum Circuit Breaker, inside robotically welded stainless steel 304 (Non Ferrite Non Megnetic Grade) tank having min. thickness 2.5 mm with IP 67 Degree of Protection and enhanced BIL of 75kVp internally to manage voltage surges. RMU should be provided with internal busbars, as well as earthing busbars of electrolytic grade copper, padlock provisions & complete with all accessories. The RMU shall be type tested for Internal arc test of AFL 21kA/1 sec for tank as per IEC62271-200.RMU shall have on-site-repairability features such as site replacable bushing/ coupling/ mechanism and gas refilling at site. The earthing busbar shall be provided inside each cable compartment for soilid earthing of Cable sheilds. The outer hinged main door should cover entire front of switchgear including cable doors for providing fail-safe protection. The unit shall include the following with all necessary standard fitting as required at site.OEM Make: ABB, Schinder Infrastructure, Siemens 4 Note: item no (1 to 3) (i) Load Break Switch module consisting of following accessories :11kV, 630A Load Break Switch module and integrated earthing switch, both with full making capacity.Short time current - 21kA/3-sec, Making Capacity - 52kApAuxiliary contacts - 1NO + 1NCFault Pass Indicator - 1 No.for Incoming LBSSpring-assisted snap-action mechanism driven via shaft that remains un-inhibited after motorization, if required in future.Cable boxes with double-door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access to 3Cx300sqmm XLPE AL cable termination in live-condition,Right angle boots (push on type)Suitable site replacable Cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/testing/replacement purposes.Cable covers with self Interlocking mechanism with earth switch Capacitive voltage indication fixed type system as per IEC61243 5 (ii)Breaker module consisting of following accessories :11kV, 630A fixed-type Vaccum Circuit Breaker module for making and breaking of fault current alongwith disconnector+Earth Switch of full making capacityShort time current - 21KA/ 3 sec, Making Capacity - 52kApAuxiliary contacts - 1NO + 1NCStored Enegry mechanism with manual spring-charging, associated closing/tripping coils, integrated non-removable spring-charging operating handle and ON/OFF push buttons mechanically latched to the mechanism Interlocked Cable box for front termination of the cable suitable upto 3 core 300 Sqmm,11 KV XLPE cable with double-door arrangement (IP54+IP3X). Safety interlocked to prevent access to cable termination in live-condition. Right angle boots (push on type)Numerical based self-powered OC+EF Protection Relay, providing OverCurrent (min. setting 20%), Earth-Fault (min. setting: 10%)03 Nos 100/1, 2.5VA epoxy insulated, Ring Core CTs for protection (Acc.Cl.5P10), installed away from bushings to prevent saturation of core.Suitable site replacable Cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/testing/replacement purposes.Cable covers with self Interlocking mechanism between doors, earth switch, disconnector & VCBCapacitive voltage indication fixed type system Mechanical Indications for breaker ON, OFF, EARTH, TRIP, Spring Charged-Discharged(iii)Capacitive voltage indication fixed type VPIS 9-15 kV(iv)Necessay interclocking arrangement for safety and operations(v)One No. Operationg Handle for Manual Operation and one no. manometer(vi)Safety Interlocks Shall be provided as per relevant IEC/IS Standards and Manufacturers directions.(vii)Above switchgear shall confirm to all relevant IEC/IS Standards.(viii) Vacuum interrupter should be of same make as RMU(ix)Cable bushing should be replacable at site.(x) Minimum 5 module should accommodate in one tank to avoid multiple coupling at site. 6 M&L for Boring of holes under road, pavement, hard standing by trenchless technology using ultra sound technique and necessary machine including HDPE pipe of 150 mm dia suitable for 0.4 mpa working pressureetc complete all as specified and directed. 7 Supply,Layingtesting in replacement of cable XLPE insulated, screened, PVC bended,galvanized steel strip or wire armoured, electric power cables (heavy duty) with standed aluminium conductor, 11000 volts grade, of size 3 core 95 Sq mm Note: Old Ht cbles maney placess comes under the building/sewage pipe lines/roads so that the total credit ht cble not carted into credit schedule . 8 Slupply and fix in replacement ofcable jointing kit for 11 KV grade cable for in door termination, heat shrink type, joint complete wioth jointing material and accessories suitable for 3 core XLPE, armoured, AI conductor cable of size 120 to 185 Sq mm 9 Slupply and fix in replacement ofcable jointing kit for 11 KV grade cable for in door termination, heat shrink type, joint complete wioth jointing material and accessories suitable for 3 core XLPE, armoured, AI conductor cable of size 50to 95 Sq mm 10 Slupply and fix in replacement of cable jointing kit for 11 KV grade cable for out door termination, heat shrink type, joint complete wioth jointing material and accessories suitable for 3 core XLPE, armoured, AI conductor cable of size 50 to 95 Sq mm 11 Slupply and fix in replacement of cable jointing kit for 11 KV grade cable for out door termination, heat shrink type, joint complete wioth jointing material and accessories suitable for 3 core XLPE, armoured, AI conductor cable of size 120 to 185 Sq mm 12 Slupply and fix in replacement of cable jointing kit for 11 KV grade cable for straight throughj coldshrink type, joint complete wioth jointing material and accessories suitable for 3 core XLPE, armoured, AI conductor cable of size 50 to 95 Sq mm 13 Slupply and fix in replacement of cable jointing kit for 11 KV grade cable for straight throughj coldshrink type, joint complete wioth jointing material and accessories suitable for 3 core XLPE, armoured, AI conductor cable of size 120 to 185 Sq mm 14 Supply and laying in replacement of GI tubing 100 mm dia light gradelaid in trenches/floor/fixing on pole / wall / in tarmac including necessary fittings etc.complete& all as specified and directed. 15 Excavation in trenches, for foundation of poles, stays or for laying of cables, not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth and getting out as in soft / loose soil complete all as specified & directed. 16 Returning, filling in, including spreading, leveling, watering and well ramming in layers not exceeding 25 cm thick in soft/loose soil completer all as specified and directed. 17 Removing excavated material(soil) not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and directed 18 M & L of Supplying and laying reinforced precast concrete cable cover, class HV, type 1 , flat, size 300mm x 180mm x 40 mm and flat across the axis of cable,complete all as specified & as directed by Engineer-in-Charge. 19 M&L for sand cushioning to underground cable in trencheswith clean dry river sand for protection of cable complete all as specified and directed.( punned thickness will be measured). 20 Material and labour in replacement of earthing complete with galvanized iron earth plate electrode 600 mm x 600 mm x 6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.5 m deep below normal ground connected to galvanised mild steel strip 32 x6 mm by means of bolts nuts check nuts and washer of galvanized steel, watering pipe of 20 mm bore galvanised iron medium grade and 40 mm bore galvanised iron light grade for earth strip protectionincluding all excavation earth work in any type of soil, PCC pitin PCC 1:2:4 type B-1 and RCC 1:2:4, type B1 for precast chamber cover 50 mm thick, reinforced with welded steel wire fabric or XPM Jali (weight not less than 4.00 Kg / sqm),with charcoal, salt, funnel complete all as shown in the electrical plate No 3 of SSR part –I and testing on completion. Note : Earth result after installation completely should be less than 3 ohm. 21 Supply and fixin repair mild steel galvanised earth strip of size 32 x 6 mm with epoxy insulators and fixing screws etc for earth continuity conductors to test point terminal including taking down old strip all as directed by Engr-in-charge. 22 Taking down old u/s two pole four pole structure and connected items complete removing at site and deposited at mes stores all as specified and directed by Engineer-in-Charge.
