REPAIR/REPLACEMENT OF HT UG CABLE FROM MRS TO HASTING ROAD, MP LINES AND UMRAO COMPLEX AREA AT NEW CANTT UNDER GE (WEST) PRAYAGRAJ.

Amount

Supply, laying & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 120 Sqmm, three core (IS-7098) in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing and including cable indicator complete all as specified and directed.

Excavating in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth and getting out in soft/loose soil including bottom surface to required level or slope for laying of cable etc. complete all as specified and directed.

Returning filling in excavated soil, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm each in soft/loose soil complete all as specified and directed.

Removing excavated soil to a distance not exceeding 50 mtr and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as specified and directed.

M&L sand cushioning with dry local sand for cable protecting under ground cable (8 cm before laying the cable and 15 cm after laying the cable) in trenches and consolidated complete all as specified and directed. Note -: Punned thickness 18 cm only shall be considered for payment.

Supplying and laying reinforced precast concrete cable cover, class HVP, type 1 with peak, size 300mm x 180mm x 40mm to cover/laid over the cable in cross direction to give mechanical protection to under ground cable complete all as specified and directed.

Supply, laying & testing cable jointing kit for 11 KV (earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm complete all as specified and directed .

Supply, installing, connecting and commissioning switch air break gang operated, triple pole, vertical mounted, out door type of 12 insulators, mechanically operated, mounted on insulators and steel frame, with operating mechanism and operating rod of 25mm bore GI pipe heavy grade worked from ground level, with locking arrangements including brass pad locks with key (Make. Godrej/Harrison/Link) for current rating 400 Amp at 11 KV, complete all as specified and directed.

S&F steel tubular electric pole, for HT line, welded (11 metre long) complete with CI base plate, bolts, nuts & screws all as specified including the following:- (a) Excavation in post hole not exceeding 1.5 Mtr wide & 2 Mtr deep for pole foundation & getting out in soft loose soil, returning, filling in the excavated soil after fixing the pole in foundation, ramming earth around in layers n.exc 25 cm thick and disposal of surplus soil to a distance n.exc 50 metres. (b) M&L for Providing PCC 1:4:8, type D2 (using 40 mm graded crushed stone aggregate) in foundation 600mm x 600mm x 1500 mm (planting depth) for concrete encasing the pole upto GL

(c) M&L for Providing PCC 1:3:6, type C-1 (using 20 mm graded crushed stone aggregate) for plinth block /Collar above GL, 300 mm high and 450 mm dia (d) M&L for painting of pole externally with one coats of black bituminous paint (upto planting depth) and above plinth block/ concrete collar with two coats of aluminium paint over a coat of red oxide primer including preparation of surfaces including painting of 30 cm wide black bands 3 Nos with synthetic enamel paint in alternate layers upto the height of 1.5 Mtr above plinth block.

S&F Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint complete all as specified and directed.

Supply and fix Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp for 11 KV complete all as specified and directed.

M&L 80mm bore steel tubing galvanised “Light Grade” in trenches/poles, under floors, roads, along poles for protection of cables, including sealing ends all as specified. Note :- Clamps for fixing pipe on poles shall be included in quoted rate. Make : Jindal /Tata

M&L Boring of holes (manually) under road , hard standing without damaging the surface for 80 mm bore GI Pipe complete all as specified and directed.. Note:- (i) Depth of hole shall be 1 Metre below the top surface of Road / hard standing. (ii) Pipe shall be measured and paid seperately under respective item of the schedule.

Design, Supply, Erection, Testing and Commissioning of 11 KV, 630A, 21KA for 3sec, SF6 insulated, Motorized, Outdoor, Non extensible RMU (Ring main Unit) 3-Way comprising of 2 Nos 630 Amps, vaccum circuit breaker (comprising two No Incomers & 1 No Vaccum circuit breaker as outgoing) along with air insulated side connected bus metering unit , type tested in line with latest IEC 62271-220. The switchgear and busbar shall all 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 IP54. The outer enclosure should be IP 55 type tested, should be powder coated with pure polyester based paint , suitable for the site installation condition. 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 and rear (A-FLR 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 AFLR 21 kA for 1 sec for both tank & cable box should have been for minimum 3 way / 3 Function RMU (3SF6Insulated VCB). 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.

(a) 2 Nos Incoming and 01 No outgoing,11 KV,630A, 21KA for 3sec Motorized VCB with spring assisted mechanism and series trip coil; with built in manual line side three position disconnector cum earth switch. Earthing should be completed 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 100 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 actionarc proof hinged type cable cover air insulated cable boxes and boots suitable for bottom front entry termination of 3 core cable 95/120/185 sqmm.

(b) Position indicator through clear front mimic in line with IEC 62271-103 (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. (d) Suitable ratio CT -/1 A, Class 5P10, 2.5VA for protection. (e) MFM Class 0.5. (f) 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. (g) Cable box with termination bushing suitable for upto 1 RUN 3Cx300 Sq mm, XLPE cable. Cable Box should have Thermal & Climate Sensors for montinoring of Overheat & Moisture ingress. (h) Cable Boots suitable for actual cable size. (j) Mechanical operation counter. (k) Emergency trip push button. (l) Bus Connected Metering PT. (m) Accessories :- (i) Antireflex operating handle. (ii) Battery 24V DC , 12Ah. (iii) Battery charger (I/P-230V AC, O/P - 24V DC). (iv) Manometer with remote contact. (v) 01 No holder with lamp for illumination. (vi) 01 No space heater with thermostate.

(n) Coupling of RMU and metering module should be with the help of bolted type arrangement so that the coupling at site shall be easy. Pulg in type bushing shall not be acceptable. (o) Minimum 3 module should accommodate in one tank to avoid multiple coupling at site. (p) The switchgear shall have built in progamming logic using reputed make PLC (ACS500/Equip) for automatic change over between two motorized incomer VCB and shall derive voltage reference from incoming supply in respective incomer. PLC shall also be wired to all VCB's to monitor open/close 3+0.5 status. PLC should have communication facility over MODBUS protocol. (q) Three set of remote operation & control kits for motorisation & operation of PLC. (r) Three set of signal converter for PLC operation. (s) The autochangeover for incoming feeders shall be done within 10-15 second. (t) The PLC shall programmable at factory as well as dite for accoummodating future requirements as per manufacturers instruction for autochangeover for feeders. (u) PCC 1:2:4 type B1 using 20 mm graded aggregate for foundation of RMU as per recommendation of manufacturers & as directed by Engr-in-charge. Note :- (i) Any other parts/items not specified above but have been considered essential for smooth and safe functioning of the RMU system shall be included in the items and are covered against the quoted rate. (ii) Design and line diagram of electric circuit of RMU shall be approved by GE. So, same shall be submitted by the Contractor to GE before purchase of RMU. Nothing shall be admissible for the same.

M&L for earthing as per IS:3043 with galvanized steel earth plate electrode 600 x 600 x 6.0 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 less than 1.5 metre below normal ground level connected to galvanized iron strip 32x4 mm dia as earthing lead protected by GI pipe medium grade 40 mm bore for protection of GI earth strip and 20 mm dia GI pipe medium grade for watering with alternate layers of charcoal /coke and salt including all accessories like nut, bolts, reducer, nipple, wire meshed/screened funnel and making brick masonry finished chamber of internal size 300 mm x 300 mm x 300 mm with cement concrete in PCC 1:2:4 covered with a cast Iron hinged cover resting over the cast iron frame painted with black bitumastic paint which shall be embedded on top of chamber including excavation works, refilling, connected to main switch/MCB DB for feeding the electric supply compete all as specified as shown in electrical plate no. 3 of SSR Part-I and testing of earth resistance as required compete all as specified.

M/S MALHOTRA ENGINEERING WORKS

Diamond Electric Co.

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