SPECIAL REPAIR REPLACEMENT OF 4 POLE HT STRUCTURE WITH OUTDOOR TYPE VCB CUM RMU OF SUB STN AT CERTAIN LOCATIONS UNDER GE I NAVY JAMNAGAR

Amount

Taking out the existing Oil Switch gear any rating from site and deposited to MES stores including disconnecting of incoming and outgoing connection and loading unloading complete all as directed by Engineer-in-Charge.

Taking out the existing CTPT from four pole structure including disconnecting of incoming and outgoing connections and refixing the same on steel structure made of MS channels complete all as directed by Engineer-in-Charge. Note: MS Channels shall be measured and paid under relevant items of this BOQ

Dismantling the existing HT 11 Mtr four pole structure complete along with any size & type of cross arm sections, insulators, ACSR busbar of any size, GOD, any size of HT cable (upto 20Rm ) approx etc and relaying the same at new route as required at side as ordered and staking the dismantled items at site or other location where directed by Engineer-in-charge for safe custody complete all as directed. Note: (i) Excavation & earth work for relaying cable shall be measured & paid under relevant items of this BOQ. (ii) Care should be taken so that damage the existing LT/ HT cable network should not be disturbed/ damaged.

M&L for TMT bars/ Mild steel angle 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 and inclusive of one primer coat, one under aluminium coat and one aluminium finishing coat of paint complete all as specified.

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth for foundation, laying of pipe line, Cable etc and getting out in soft/ loose soil complete all as specified and directed.

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth for foundation, laying of pipe line, Cable etc and getting out in hard rock complete all as specified and directed.

Returning filling in trenches including spreading, leveling, watering and well ramming in layers not exceeding 25 cm thick in soil complete all as specified and directed.

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

M&L river sand cushioning for cable protection in trenches 8 cm before laying cable and 15 cm deep over the cable. Note: Thickness after punning shall be measured for payment.

Taking out existing cable cover/ bricks and Supplying and laying unreinforced precast cement concrete cable covers, ISI Marked Class HV, Flat, Type-1 of size 300mm x 180mm x 40mm in trenches for cable protection, embossed with "ELECTRIC" on the top surface complete all as specified and as directed.

Supplying, laying and commissioning of HT XLPE cables, insulated, screened, PVC bedded, galvanized steel strip armoured, earthed, electric power cable with Aluminium conductor, 11 KV grade, 3 Core, 95 Sq.mm cross sectional area laid in trenches / fixed on poles including taking down old cables complete all as specified and as directed. Note: Earth work,excavation,cable covers and sand cushioning shall be measured and paid separately.

Material and labour for cable jointing kit for 11kV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 11 kV 3 Phase, AC, 50 Hz core XLPE armoured aluminium conductor cable of size 95 to 120 Sqmm with complete jointing materials & accessories and finally testing after jointing all as specified and directed.

Material and labour for cable jointing kit for 11kV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 11 kV 3 Phase, AC, 50 Hz core XLPE armoured aluminium conductor cable of size 95 to 120 Sqmm with complete jointing materials & accessories and finally testing after jointing all as specified and directed.

Material and Labour for heat shrinkable HT, 11 KV, outdoor type, cable straight through joint suitable for 11 kV, 3 Phase, AC, 50 Hz, 3 Core, 95/120 Sq.mm, XLPE Cable including jointing materials etc complete all as specified and as directed by EIC.

Supply, install, testing and commissioning of HT 11 kV, 3 Phase, 50 Hz, 630 Amps, 21 kA/ 3 Sec, SF6 insulated CCV, outdoor Non-Extensible fixed type (IP54), RMU (Ring Main Unit) 3-way compressing of 02 Nos 630Amps, motorized operated Load Break Switch & 01 No. motorized charging fixed-type Vacuum Circuit Breaker, inside robotically welded stainless steel 304 (Non Ferrite Non Magnetic Grade) tank having min thickness 3+0.5 mm with IP 67 Degree of protection and enhanced BIL of 95kvp internally to manage 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 replaceable bushing/ coupling/ mechanism and gas refilling at site. The earthing busbar shall be provided inside each cable compartment for solid earthing of Cable shields. 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 fitting as required at site complete all as specified and as directed by the Engineer-in-Charge. Including PCC foundation as recommended by manufacturer. Location: DFO Make:- ABB, Schneider, Siemens (A) 02 Nos Incoming and outgoing Load Break Switch module consisting of following accessories:- (i) 11 kv, 630A Load Break Switch module and integrated earthing switch, both with full making capacity. (ii) Short time current – 21kA/3-sec, Making Capacity - 52kAp (iii) Auxiliary contacts - 1 No+1 NC (iv) Spring-assisted snap-action mechanism drive via motor and manual operation . (v) Cable boxes with double-door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access to 3Cx300Spmm XLPE AL cable termination in live-condition. (vi) Right angle boots (push on type) (vii) Suitable site replaceable cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation /testing /replacement purposes. (viii) Cable cover with self Interlocking mechanism with earth switch (ix) Capacitive voltage indication fixed type system as per IEC61243.

Item No. 15.00 Contd/.. (B) 01 Nos Outgoing Breaker module consisting of following accessories:- (i) 11 kV , 630A fixed-type Vacuum Circuit Breaker Module for making and breaking of fault current alongwith disconnector+Earth Switch of full making capacity. (ii) Short time current – 21kA/3 Sec, Making Capacity - 52kAp (iii) Auxiliary contacts - 1No+1NC (iv) Stored Energy mechanism with manual and motorized spring-charging, associated closing/ tripping coils integrated non-removable spring-charging handle and ON/OFF push buttons mechanically latched to the mechanism. (v) 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. (vi) Right angle boots (push on type) (vii) Numerical based self-powered OC+EF Protection Relay, providing Over Current (min Setting 20%),Earth - Fault (min setting: 10%) (viii) 03 Nos 100/1, 2.5VA epoxy insulated, Ring core CTs for protection (Acc.CI,5P10), installed away from bushings to prevent saturation of core. (ix) Suitable site replaceable cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/ testing/ replacement purposes. (x) Cable covers with self Interlocking mechanism between door, earth switch, disconnectors & VCB comprising as under: (a) Battery (24V DC) and battery charger (7.5A, 230V AC/ 24V DC) (b) Capacitive voltage indication fixed type VPIS-9-15KV (c) Necessary interlocking arrangement for safety and operations. (d) One No Operation Handle for manual operation and one no manometer (e) Safety Interlocks shall be provided as per IEC/IS Standards and manufactures directions. (f) Above switchgear shall confirm to all relevant IEC/IS Standards. (g) Vacuum Interrupter should be of same make as RMU (h) Cable bushing should be replaceable at site. (j) Minimum 5 module should accommodate in one tank to avoid multiple coupling at site.

Supply, install, testing and commissioning of HT 11 kV, 3 Phase, 50 Hz, 630 Amps, 21 kA/ 3 Sec, SF6 insulated VVVVV, outdoor Non-Extensible fixed type (IP54), RMU (Ring Main Unit) 5 way compressing of 05 Nos motorized charging fixed type Vacuum Circuit Breaker, inside robotically welded stainless steel 304 (Non Ferrite Non Magnetic Grade) tank having min thickness 3+0.5 mm with IP 67 Degree of protection and enhanced BIL of 95kvp internally to manage surges. RMU should be provide 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 replaceable bushing/ coupling/ mechanism and gas refilling at site. The earthing busbar shall be provided inside each cable compartment for solid earthing of Cable shields. 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 fitting as required at site complete all as specified and as directed by the Engineer-in-Charge. Including PCC foundation as recommended by manufacturer. Location: Main Receiving Stn (MRS) Make:- ABB, Schneider, Siemens (A) 05 Nos Breaker module consisting of following accessories:- (i) 11 kV , 630A fixed-type Vacuum Circuit Breaker Module for making and breaking of fault current alongwith disconnector+Earth Switch of full making capacity. (ii) Short time current - 21kA/3 Sec, Making Capacity - 52kAp (iii) Auxiliary contacts - 1No+1NC (iv) Stored Energy mechanism with manual and motorized spring-charging, associated closing/ tripping coils integrated non-removable spring-charging handle and ON/OFF push buttons mechanically latched to the mechanism. (v) 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.

Item No. 16.00 Contd/.. (vi) Right angle boots (push on type) (vii) Numerical based self-powered OC+EF Protection Relay, providing Over Current (min Setting 20%),Earth - Fault (min setting : 10%) (viii) 03 Nos 100/1, 2.5VA epoxy insulated, Ring core CTs for protection (Acc.CI,5P10), installed away from bushings to prevent saturation of core. (ix) Suitable site replaceable cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/ testing/ replacement purposes. (x) Cable covers with self Interlocking mechanism between door, earth switch, disconnectors & VCB (a) Battery (24V DC) and battery charger (7.5A, 230V AC/24V DC) (b) Capacitive voltage indication fixed type VPIS-9-15kV (c) Necessary interlocking arrangement for safety and operations. (d) One No Operation Handle for manual operation and one no manometer (e) Safety Interlocks shall be provided as per IEC/IS Standards and manufactures directions. (f) Above switchgear shall confirm to all relevant IEC/IS Standards. (g) Vacuum Interrupter should be of same make as RMU (h) Cable bushing should be replaceable at site. (j) Minimum 5 module should accommodate in one tank to avoid multiple coupling at site.

M&L earthing complete with galvanized steel earth plate as electrode 600x600x6 mm buried directly in ground vertically to a depth not less than 2.25 m below ground level with top edge of earth plate at a depth not less than 1.5 m below ground level connected using galvanized iron earth lead strip 32x6 mm as earthing lead by means of bolts, nuts, check nuts and washers of GI earth lead strip protected by Gl light grade pipe 40 mm bore, including provision of concrete pit of PCC 1:2:4, type B1 (using 20 mm graded stone aggregate) with 40 mm thick cover of RCC 1:2:4 reinforced with 8 mm dia TMT bars reinforced at 100 mm C/C both ways and handle of 8 mm dia MS bar made to shape, GI light grade 20 mm bore pipe for watering perforated at bottom, 2 m long placed on top edge of earth plate, char coal and common salt filling test point made out of 40x8 mm flange with fixing arrangement, funnel, wire mesh and earth work in any type of soil, returning, filling in and removal of surplus soil to a distance not exceeding 50 m all as per electrical Plate No. 3 of SSR Part I and connected to earth test point, including taking down existing earthing all as specified and as directed including testing on completion.

S&F 100 mm bore GI tubing light grade (ISI Marked) including necessary fittings such as bend, tee, elbow etc complete laid in trenches/ fixed on walls complete all as directed.

All same as per item No. 18 here-in above but 80 mm bore of pipe -do-