PROVISION OF RING MAIN HT XLPE SUPPLY INCLUDING HT SWITCH GEAR AND ALLIED ITEMS FOR O/O DG ECS UNDER GE I RND WEST BANGALORE

Amount

Excavation by Tenchless Technology: Boring of holes under earth, road, pavement, hard standing or any location as per site requirement by using ultra sounding technique and necessary machine in and including pulling of HDPE pipe 110 mm dia and pulling of HT cable of size 3 core; 185 Sq mm through pipe complete as per site requirement from tapping points to end connections and testing in all respects complete all as specified and directed. Note: (i) Actual quantity of HT cable and HDPE pipe executed on the ground shall be measured and paid as supply only under relevant item of this schedule after connections and testing etc and the cost of the wastage/ unserviceable HT cable and HDPE pipe pieces during pulling process in the boring shall be deemed to be included in quoted rate. The quoted rates is including painting and laying of cables and HDPE pipe. (ii) Routing of Trenchless boring shall be got approved from GE and all other stake holders before commencement of boring works on the ground by the contractor. (iii) The contractor is responsible for making good the damaged electric cables or any type of cables items, pipes, plinths, pavements, roads etc in the enroute of boring, earth work, making suitable chambers near the straight through joints in the enroute where ever applicable as directed and the cost for the same is included in the quoted rate and no claim of amount in this regard from the department is entertained.

(iv) The participant bidders shall visit on the site, checking of trench less technology cable route in location of O/O of DG ECS LRDE area from the tappinng point service sation along with other Schedule works in side the LRDE area before quoting their rates. Also, the firm is responsible to submit cable route drawing as directed by Engineer-In-Charge, users and by consulting trench less technology experts and the same route approved from GE before commencement of work.

Supply, testing HT cable XLPE insulated screened PVC bedded galvanised steel strip armoured electric power cable (heavy duty) 11000 volts, Earthed grade with stranded Aluminium conductors of cross sectional area 3 core; 185 Sq mm conforming to IS-7098 (Part- 2) 1985 with latest amendmends complete all as specified and directed.

Supply, testing HDPE pipe of size 110 mm dia, 10 kg/ cm2 conforming to IS standards suitable for drawing of HT cable 3 core; 185 Sq mm complete in all respects complete all as specified and directed Note for item No 2 & 3: Payment shall be done after execution of item No1 quantities as applicable on the ground in all respects complete all as specified and directed

Supply, Laying, testing HT cable XLPE insulated screened PVC bedded galvanised steel strip armoured electric power cable (heavy duty) 11000 volts, Earthed grade with stranded Aluminium conductors of cross sectional area 3 core; 185 Sq mm conforming to IS-7098 (Part- 2) 1985 with latest amendmends laid in trenches including excavation trenches in any strata at a depth 90cm and width 60cm including riddled soils for cushioning of cable below and above the cable 8cm and 15cm respectively conforming to IS-1255 and providing un-reinforced PCC cable covers HV type of size 300x180x40mm flat type and place the same width wise conforming to IS:5820 and returning, filling the trench and removing of surplus soils etc as required at site complete all as specified and directed. Note :This item shall beexecuted at places whereever boring works are not feasible on the ground or near the sub stations etc.

Supply, Install, Testing and Commissioning 11KV Vacuum Circuit Breaker 800 Amps, 3phase, 50Hz, STC 26.3KA/3sec Indoor free standing floor mounted roll-on-floor type VCB extension panel to match with the existing 2 lineup VCB panel of make Schneider made of AluZinc coated CRCA sheet steel thickness 2 mm for non-load bearing and 2.5 mm thickness for load bearing section. VCB panel shall be totally enclosed complete with electrical and mechanical interlocking, horizontal draw out, horizontal isolation roll-on-floor type vacuum circuit breaker as per IS 13118, IEC:62271-100 & 200, single break, trip free mechanism, motorised and manually spring charged and auto and manually closing breaker suitable for use on 11 KV, 3 phase, 50 Hz AC supply with short circuit fault level of 26.3 KA for 3 sec, internal arc at all MV compartments tested for minimum 26.3 kA for 1 sec AFLR. Busbar, cables and breaker chambers with common busbar duct arrangements to channelize arc exhaust of any panel to outside control room. The panel must be LSC-2B PM classification as per IEC62271 -200 complete with self contained draw out type arc-proof design conforming to relevant IEC standards complete with self-contained, fully interlocked, rack in and rack out mechanism, vacuum bottles, copper busbar of capacity 800 Amps, breaker featured with ON/OFF indicator with hand trip device, spring release coil, shunt trip coil and auxiliary switches as required and equipped with following switchgears and accessories including necessary foundation and end termination box for terminating HT XLPE 11 KV cable (cable entry from bottom) on primary and secondary side, necessary strip heaters to prevent absorption of moisture during winter and monsoon season. Vacuum interrupter for VCB shall be vertically mounted and have minimum 100 Nos of operations at full short circuit current rating as specified and shall comply to M2, E2 with auto reclosing and C2 duty as per IEC-62271-100 with type test. Bus Bar should be of Copper of suitable rating as per existing switchboard. All the main components like VI/ VCB/ Relays/ Meters shall be of same, VCB shall comprising of following complete all as specified and directed

Supply, Install, Testing and Commissioning11 KV 3-Way Ring Main Unit of capacity 630A, 25KA for 1sec, SF6 insulated, motorized, indoor type, right side extensible RMU, type tested in-line with latest IEC standards. The RMU shall be suitable for operations at a height up to 1000 metres above sea level and at 40 degree centigrade ambient temperature without any derating. The switchgear and busbar shall be contained in a stainless steel enclosure filled with SF6 at 0.3 bar (300 hPa) relative pressure. The RMU tank shall provide full insulation, making the switchgear insensitive to the environment with degrees of protection of IP67 . The switchgear operating mechanism shall have an IP2X protection and cable chamber shall have IP3X. Accidental overpressure due to an internal arc is limited by the opening of the safety valve, at the bottom of the metal enclosure, away from the operator. An operator situated in front, lateral (A-FL 21kA – 1sec, downwards exhaust, for tank as well as cable compartment) of the RMU switchboard during an internal fault will not be exposed to the effects of arcing. Internal Arc Type Test Report for IAC AFL 21 kA for 1 sec for both tank & cable box should have been for minimum 3 way / 3 Function RMU. Plug in type of extensibility must be provided and coupling busbar should not be exposed to air to avoid oxidation of busbars. Extension of cubicle should only require 450mm to handle and the gap between the coupled RMU’s must be within 10mm. All operations shall be from front of the RMU, including access to cable bushings. Cable bushings along the sides or the rear of the RMU are not acceptable. The RMU shall be equipped with temperature monitoring sensors which are suitable for wireless and battery less with direct control contact to hot points. The 11kV 3-way Ring Main Units + Bus metering panel shall comprise of the following complete all as specified and directed. Make : Schneider / ABB / Siemens

Make : Schneider / ABB / Siemens (a) 11 KV, 630A, 25KA for 1sec motorized with spring assisted mechanism and series trip coil; with built in manual line side three position disconnector cum earth switch. Earthing should be complete within 2 operations only (i.e 1. Main switch - OFF, 2. Earth switch-ON). Vaccuum interrupter should be of same make as that of RMU. The circuit breakers shall have 2 positions: open or disconnected and closed. A separate and independent 3 position earthing switch and disconnector shall be fitted to open and earth the cables in such way that interlocks prevent all unauthorized operations. An independent mechanism shall be fitted for the 3 positions earthing switch and disconnector. Circit breaker shall have a min of 2000 mechanical and 2000 electrical operations at rated current and 50 nos of operations at rated short circuit current. Disconnector and earthswitch shall have a min of 1000 (M1) mechanical operations. The earthing switch shall be fitted with its own operating mechanism and manual closing shall be driven by a fast-acting mechanism, independent of operator action.

(b) Position indicator through clear front mimic in-line with IEC 62271-103 - 01 No (c) Self powered relay with O/C, E/F protection. Relay should have a front USB port for laptop interface, LCD display,10 event records, 5 fault records with time stamp, min 2 setting group and keypad for setting parameters for the relay. Relay should be of same make as that of RMU - 01 No. (d) Current transformer ratio 100/1 A, class1/ 5P10, 2.5VA burden for protection. (e) Live cable indicator with indications (Voltage Presence Indicator) at the front and three inlets provision to check the synchronization of phases.VPI should be of same make as that of RMU - 01 No. (f) Cable box with termination bushing suitable for upto 2run 3Cx300 Sq mm, XLPE cable including suiatable touch proof termination kit -01 Set. (g) Cable Boots suitable for actual cable size - 1 Set. (h) Mechanical operation counter - 01 No

(j) Emergency trip push button - 01 No (k) Air Insulated Bus Connected Unit comprising the following:- (i) Air Insulated enclosure with necessary bus connection via bushing.VT’s from the manufacturer and according to IS 3156 shall be accepted - 01 No. (ii) Potential transformer ratio11KV/rt3/110V/rt3; 50VA burden of class 0.5 with HT fuses on HT side and MCB on secondary side - 03 Nos (iii) Antireflex operating handle - 01 No. (iv) Battery 24V DC, 12Ah - 01 No. (v) Battery charger (I/P-230V AC, O/P - 24V DC)-01 No. (vi) Manometer with remote contact - 01 No. (vii) MFM for outgoing breaker with modbus RS485 - 01 set.

Note for item Nos 5.00 & 6.00: (i) The quoted firm must do the site survey before quoting. All erection items, civil work for foundation, cable termination kits, cable termination of both power and control cable, unloading at site, total testing and relay setting, factory testing in the OEM premises and Pre-commisioning Test by SeniorElectrical inspector after erection on the site is inclusive in the quoted rate. (ii) Vacuum interrupter bottle, Vacuum Circuit breaker, Main Numerical Relay & HT Panel shall be of same OEM make in whose name type test reports will be submitted. (iii) Vacuum circuit breaker & HT panel shall be of same make only. (iv) HT Panels to be manufactured, tested, dispatched from OEM factory in whose name type test reports shall be furnished. HT Panels manufactured by system integrators/ franchise partners of OEM are not acceptable. (v) HT panel shall be type tested for internal arc 26.3kA for 1 sec for all HT compartments. i.e., Busbar, CB & Cable compartments. Type test reports shall be furnished. (vi) HT Panel construction shall be made up of Aluzinc material for higher strength and also to avoid effects of corrosion /rusting . CRCA sheet can be used for front doors and end cover only. (vii) Vacuum Circuit breaker shall comply to Electrical Endurance – E2 class, Mechanical Operations - M2 class, Capacitive Switching duty - C2 class in conformance to IEC 62271-100. (viii) The VCB and RMU shall be manufactured at OEM factory and not from channel partner

Dismantling of existing ICOG VCB panel of any make/model/capacity from DG ECS sub-station by disconnecting incoming and out going cables carefully, testing of cables properly, VCB kept aside and cables for reconnecting with the proposed RMU and Transormer etc complete all as specified and directed

Dismantling of existing ICOG VCB of any make/model/capacity from A3MTDC sub-station by disconnecting incoming and out going cables carefully, shifting in and including using required crane and transport to DG ECS store and obtained receipt from Engineer-in-charge and EMU auth all as per site requirement complete all as specified and directed.

Material and Labour for shifting and relocation of ICOG VCB panel as obtained item No 7.00 here-in-above carefully to A3MTDC Sub stataion , re-installation ICOG VCB panel in the A3MTDC sub station in and including using required crane and transport as per site requirements, servicing to ICOG VCB panel complete in all respects including replacement of all defective parts, caliberation relay setting, provn of new power pack suitable for Two trips, primary injection & secondary injection testing, connecting incoming and out going cables on both ends including commissioing complete all as specified and directed. Note for Item No. 7 to 9 :- (i) The quoted firm needs to visit the site before quoting their rates to understand the work at site. (ii) The quoted rate is also deemed to be inclusive for required spares, modification works, erection items, civil works as per site requirements and for all existing cables to be re-connected with proper end terminations.

Material and labour for Indoor cable end termination joint with heat shrinkable jointing kit complete with cast resin compound including lugs and jointing materials and other accessories suitable for 11 KV XLPE insulated cable of size 3core; 185 Sq mm aluminium conductor complete all as specified and directed.

Material and labour straight through cable termination joint with heat shrinkable jointing kit complete with cast resin compound including lugs and jointing materials and other accessories suitable for 11 KV XLPE insulated cable of size 3core; 185 Sq mm aluminium conductor complete all as specified and directed

Material and labour for copper earthing with copper earth plate 600 mm X 600 mm X 3 mm thick buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not lessthan 1.5 metres below normal ground level, connected to copper earth strip 25 mm X5 mm by means of with copper nuts, bolts, spring washer etc and connected to equipments as directed, including funnel with wire mesh and watering pipe with GI pipe 20 mm dia medium grade including charcoal and common salt in alternate layers all around the earth electrodeof 15 cm thickness compacted and concrete pit in PCC 1:3 :6 type C1, 50 mm thick pre-cast RCC 1:2:4 type B1 cover slab reinforced with 8 mm dia deformed bar 15 cm c/c with suitable handle of 10 mm dia round bar, GI pipe 40mm dia light grade for protection of copper earth strip including necessary excavation earth work in any type of soil including getting out and disposal of spoil to a distance n.exc. 50 m and necessary testing complete all as shown on electrical plate No 3 of MES SSR Part-I complete all as specified and directed Note: (i) The Cost of Earth copper strip and GI protection pipe 40 mm light grade upto 7.5 mtrs shall be deemed to be included in the quoted rate (ii) The resistance of earthing should be less than 2 ohm. if earthing pit results exceeds 2 ohms the quoted firm is responsible to do another eathing at his own cost.

Material and labour for copper strip 25 mm X 5 mm drawn through in and including GI pipe 40 mm dia light grade from earth electrode including connection with copper nuts, bolts, spring washers including excavation in any strata, returning/ filling and removal of surplus soils etc as required complete all as specified and directed.

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