REPLACEMENT OF 11 KV HT OCBs AGAINST BER WITH HT VCB s AT DGQA COMPLEX UNDER GE NORTH SANTACRUZ MUMBAI

Amount

Dismantling all electrical connections HT UG cables from HT OCB 11 KV complete and taking out from sub station bldg and handing over to MES store yard at Kalina Santacruz Mumbai all as specified and directed.

Dismantling all electrical connections HT UG cables from HT Oil fuse switch, 11 KV complete and taking out from sub station bldg and handing over to MES store yard at Kalina Santacruz Mumbai all as specified and directed.

Excavation in trenches n. exc 1.5 m in depth and not exc 1.5 m wide for foundation or pole or laying of cable and getting out in hard/dense soil complate all as specified.

Returning & filling, including spreading, leveling, watering and well ramming of hard and dense soil in layers not exc. 25cm complete all as specified.

Removing excavated material /deberies n..exc 50m and depositing where directed at a level n. exc 1.5 above the starting point all as specified.

Supply and lay double walled corrugated DWC HDPE pipe 90 mm outer diameter,as per IS-16205 and including couplers and bend for cable protection laid in trenches complete all as specified and directed. “Make” : Telerex/Finolex/Prince/Supreme

Supply, laying, connecting and commissioning 95 Sqmm 3 core HT under ground cable 11000 volts (Earthed) grade XLPE insulated(heavy duty) and sheathed, armourd with aluminium conductor including connecting with suitable size of cable glands lugs etc laid in trenches or fixed on wall including taking out existing UG cable complete all as specified and directed. “Make” : Havells/KEI/Finolex

S&F XLPE cable end termination, heat shrinkable, Indoor type, suitable for voltage 11kv (Earthed), 3 core 95 sqmm to 120 sqmm including all suitable materials and accessories complete all as specified and directed. “Make” : M-Seal/ Raychems/Birla-3M

Supplying installation, testing and commissioning of Indoor Vaccum Circuit breaker Consisting of VCB triple pole 400 amps, breaking capacity of 13.1 KA, having rupturing capacity 250 MVA for 3 seconds horizontal isolation and horizontal draw out type 11 KV totally enclosed extensible pattem with automatic drop down and independent spring charging type motor operated closing mechanism including motor suitable for operation on 230 volt single phase 50 cycle AC supply system and manually operating system with 30 volt DC shunt trip coil with Auxiliary switches mechanical ON/OFF indicator with protective relays and conforming to IS 3427 of 1997 complete all as specified with and including following items:- (a) 3 Nos vacuum interrupters of rating 11 KV, 3 phase 50 Hz. 400 Amps having rupturing capacity 250 MVA mounted on common base segregated Epoxy body for higher electrical insulation and to maintain pole discrepancy as per IEC 56 and self aligned type isolating contacts. (b) Self powered microprocessor controlled numeric relay comprising of two over current, one earth fault protection relay with high set for both phase and earth and with fault memory. universal auxiliary supply as per IS-3231, 8686 The setting for over current shall be upto 200% of 5A and for earth fault element from 20-80% of 5A Make : ABB/ SIEMENS/Indian Transformors & Electricals Pvt Ltd/ L&T/ Crompton. (c) Current transformer(CT's) one set of three of ratio 50/25/5+5 Amps having 15 VA burden class 1.0, for metering and class 5P10 for protection- 01 Set of 03 Nos. (d) Digital Master trip relay -1 No & One No antipumping Redlay b(e) Digital type multifuction meter CT operated 110 Volts/ 30 having voltage , current, pf,freqduedncy viewing facility (0-100 A), (0-15V) suitable for CT & PT ratio as stated above. Make;- Secure/L&T/Schinder/ ABB/ Seimens - One for each panel (f) Set of LED indicating lamp operating at 110V single phase as below:- (i) RED/GREEN. VCB ON-OFF Indication. (ii) AMBER: Trip Indication. (iii) WHITE: Trip Circuit Healthy Indication with Push Button. (iv) BLUE: VCB Mechanism Spring Charged Indication (g) 11 KV, 250 MVA 400 Amps, Three Phase Copper busbars with Rear cable termination ie. Provision for terminating 3 core XLPE Cable of required size. (h)1 No Strip heater-100W (continuously rated) with thermostat control for breaker/CT compartment with manual ON-OFF switch-1 set.. (j) Structural steel frame including PCC foundation and earthwork as per manufacturer specifications. (k)1 No 3 way breaker control switch with positions TRIP-NEUTRAL-CLOSE (l) Both manual spring charging and motorised spring charging andoperating arrangement. (m) MCB 2.5A/3 amp for metering and protection circuit. (n) (i) Auto trip. (ii) Motor/manual charged spring operating/closing mechanism. (iii) Fault alarm. (iv) Manual tripping (o) All wiring necessary for the above including interconnection to trip coil. The wire should be FRLS type in all panels. (p) Test Terminal Block (TTB) to test meters and relays with sealing arrangement. NOTE :- 1. Make of HT Panel :- Crompton/ Schenidr Electrical/ ABB/ Siemens. 2. Contractor shall produce manufacturer's test certificate for all routine and type test of VCB's 3. Rate quoted is deemed to be inclusive for above provisions and Civil works for foundation as per manual of manufacturer. 4.Any spare/item required at site for functional of above VCB shall be done without any extra cost to the department. 5. Factory visit/ test shall be carried out by representative of accepting officer, contractor shall arrange the testing at manufacturer premisses before dispatch of materials from factory. 6. Commissioning of VCB pannels after installation shall be carried out by injecting current from outside source by a qualified engineer from OEM, Contractor shall arrange the tests as directed by Engineer In charge.(7) Panel shall be designed in such way that 3 Nos of VCB’s shall be installed at Ghatkpoar power house one as incomer and two as outgoing with common busher (8) One VCB Panel shall be installed at Vikhroli Power house for protection of 750 KVA transformer in replacement”

Cast resin Potential transformer (PT) dry type having minimum 200 VA burden, ratio 11 KV/30 Volts - for 3 phase system. “Make” : Schneider/ ABB/ Cromptom/ Siemens/L & T.

Design manufacture and supply of 110V fully automatic battery charger cm auxiliary power supply unit suitable for VRLA batteries with constant voltage and constant current featuresrger, Input Voltage: 415v AC, Output Voltage: 30 Volts DC electronic type single phase 240 volts input & output 30 Volts DC with 02 Nos of 12 Volts, 80AH battery ( complete for backup to relays and other protection system complete with all as directed by Engineer In Charge. PROTECTIONS AND FEATURES 1. Over charging 2. Over voltage 3. Under voltage 4. Over load 5. Over load trip 6. Current limit 7. Short circuit INDICATIONS AND METERING 1. RYB lamps, float on & boost on. 2. Programmable type DC Voltmeter & Ammeter with under voltage, over voltage settings. 110V battery charger is a dual charger that is separate Float & separate Boost charger.

Supply and fix 30 V, 26AH auxiliary power pack with battery backup (maintenance free) with single phase 230 volts input and output 30 volts DC suitable for operation of relays and other protection system including charging system complete with all as directed by Engr In Charge. “Make”: Amararaja/ Crompton/Zeal.

M&L for earthing with GI plate 600mmx600mmx6mm thick, burried 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 Mtr below normal ground level, connecting to GI plate with 32x6 mm GI earth strip upto 7.5 Mtr long from earth point to test point by means of bolts, nuts, check nuts, washers and provision of charcoal, salt, 20Kg Benzonite powder to reduce the earth resistance etc including watering arrangement with 15 mm dia GI medium grade pipe, and 40mm dia GI pipe for protection of GI strip ,MS funnel, PCC chamber in cement concrete 1:3:6 type C1 and finished even and smooth without using extra cement, 50 mm thick RCC cover 1:2:4 type B1 including 10 mm dia deformed bars @100 mm c/c on both ways for full size of chamber complete all as per electrical plate No 5 including necessary excavation and earth work in any type of soil complete all as directed.

M & L for GI strip size 32 x 6 mm size for continuity earth conductor all as specified.

Chaudhary Enterprises (BID ID -3069348)