ADDITION/ ALTERATION TO HT 6 POLE/ 4 POLE STRUCTURE USE TO SF6 CIRCUIT BREAKER 11KV DISTRIBUTION PANEL AND SPECIAL REPAIRS/ REPLACEMENT OF OCB TO VCB AND CONNECTED WORKS AT CHAFB UNDER GE (AF) BANGALORE

Amount

M & L for taking down old steel tubular pole of any size length including connected items all as specified and directed.

M & L for taking down old concrete pole of any size length including connected items all as specified and directed.

M & L for taking down old GOD'S of any type including connected items all as specified and directed.

M & L for excavation in trenches not exc. 1.5m wide and not exc 1.5m in depth and getting out in soft /Loose soil for laying of cable and all as specified and directed.

M & L for returning filling in, including spreading, levelling, watering and well ramming in layer not exc 25cm all as specified and directed.

M & L for removal of surplus soil (excavated soil) to a distance not exceeding 50m and depositing where directed at a level not exc 1.5m above the starting point all as specified and directed.

M & L River sand, spread dry in trenches as in cable cushioning all as specified and directed. Note : Punned thickness shall be measured and paid.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1 with peak, size 300mm x 180mm x 40mm laid in trenches as in protection of UG cables complete all as specified and directed.

Supply & laying of HT 11 KV 3 core XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) of cross sectional area 120 Sqmm X 3 core with aluminium conductor, 11000 volts complete all as specified and directed at site.

Supply & laying of HT 11 KV 3 core XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables ( heavy duty) with aluminium conductor, 11000 volts complete all as specified and directed at site of cross sectional area 240 Sqmm x 3 Core.

M & L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor straight through Cold shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 Sqmm complete all as specified and directed.

M & L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination Cold shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 Sq mm complete alll as specified and directed.

M & L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination Cold shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 240 Sq mm complete all as specified and directed.

M & L for Boring of holes under road, pavement, hard standing by trenchless technology using ultra sounding technique and necessary machine including HDPE pipe of 110 mm dia suitable for 0.4 mpa working pressure complete all as specified and directed.

Design, Supply, Erection, Testing and Commissioning of 11 KV, 3 phase, 50 cycles, 6 Way (1 incoming , 5 out going ) outdoor type totally enclosed metal clad SF6 insulated Vaccum circuit breaker switchgear having rupturing capacity upto 250 MVA, Breaking Capacity 21KA, Overload and Earth Fault protection, Rating of 630A, 21KA for 3sec, SF6 insulated, Motorized, Outdoor, 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 ambient temperature without any derating. 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 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-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. 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 connected devices shall be as specified. Manufacturers shall ensure to use same make Vaccum Interrupters & Vaccum Circuit breakers

6 Way (1 incoming , 5 out going ) outdoor type totally enclosed metal clad SF6 insulated Vaccum circuit breaker have following standard electrical & mechanical datas 5 outgoings comprising of following :- Vaccum circuit breaker module with vaccum circuit breaker, three position isolator/earthing switch, busbars, interlocking, earthbar and stored spring energy mechanism Vaccum circuit breaker 11kV, 630A, 21kA for 3-sec 1Microprocessor base Numerical type self powered relays with O/C and E/F protection – CSDPR relay. 1Set of 3 Ring Core Protection CTs 2.5VA Class 5P10 - Ratio as per load requirement at site. 1Cable bushings 400 series bolted 1Capacitive voltage indication fixed type VPIS 9-15 kV Air insulated module 11kV, 630A, 21kA for 3-sec 2 x 12 battery & battery charger Manual operating handle Coupling set

Design, Supply, Erection, Testing and Commissioning of 11 KV, 3 phase, 50 cycles, 4 Way (1 incoming , 3 out going ) outdoor type totally enclosed metal clad SF6 insulated Vaccum circuit breaker switchgear having rupturing capacity upto 250 MVA, Breaking Capacity 21KA, Overload ane Earth Fault protection, Rating of 630A, 21KA for 3sec, SF6 insulated, Motorized, Outdoor, 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 ambient temperature without any derating. 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 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-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. 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 connected devices shall be as specified :-

Manufacturers shall ensure to use same make Vaccum Interrupters & Vaccum Circuit breakers 4 Way (1 incoming , 3 out going ) outdoor type totally enclosed metal clad SF6 insulated Vaccum circuit breaker have following standard electrical & mechanical datas Vaccum circuit breaker module with Vaccum circuit breaker, three position isolator/earthing switch, busbars, interlocking, earthbar and stored spring energy mechanism Incoming 11kV Fixed Manually operated Vaccum Circuit Breaker as Incomer 1 Vaccum circuit breaker module with Vaccum circuit breaker, three position isolator/earthing switch, busbars, interlocking, earthbar and stored spring energy mechanism Vacuum circuit breaker 11kV, 630A, 21kA for 3-sec 1Microprocessor base Numerical type self-powered relays with O/C and E/F protection – CSDPR relay. 1Set of 3 Ring Core Protection CTs 2.5VA Class 5P10 - Ratio as per load requirement at site 1Cable bushings 400 series bolted 1Capacitive voltage indication fixed type VPIS 9-15 kV

Outgoing three Nos Vacuum circuit breaker 11kV, 630A, 21kA for 3-sec 1Microprocessor base Numerical type self powered relays with O/C and E/F protection – CSDPR relay. 1Set of 3 Ring Core Protection CTs 2.5VA Class 5P10 - Ratio as per load requirement at site. 1Cable bushings 400 series bolted 1Capacitive voltage indication fixed type VPIS 9-15 kV Air insulated module 11kV, 630A, 21kA for 3-sec 2 x 12 battery & battery charger Manual operating handle Coupling set

Supply and installation, Testing & commissioning of HT 11 KV ,3 phase, 50 cycles, 630 Amps CB type SF6 gas insulated RMU non extensible non DAS comprising of 2 nos of load breaker switch & 1 number manual fix VCB switchgear having rupturing capacity upto 250 MVA, Breaking Capacity 21KA overload and earth fault protection, ammeter, voltmeter and of rating upto 630 Amp ,including connecting ,testing complete and necessary tesing permission from BESCOM complete all as specified and directed

Note : Technical datas for Item no 15,16 and 17 as follows :- (i) STANDARDS AND MECHANICAL DATA Metal Enclosed switchgear: IEC 60298 General Purpose switches: IEC 60265 Disconnectors and Earthing switches: IEC 60129 Switch Fuse Combination: IEC 60420 Circuit Breakers: IEC 60056 Common clauses: IEC 60694 Pressure of SF6 gas: as per OEM type tested design Cable bushings: DIN 47636 Temperature class: -25 degree C to 50 degree OUTDOOR Degree of protection: - SF6 tank: IP 67 - Front cover: IP 2X - Cable cover: IP 3X - Outdoor enclosure IP 54 Busbars: 240 mm2 Cu Earth bar (external): 120 mm2 Cu - Bolt dimension: M10

Thickness of Stainless Steel Tank: 2.5 mm Colours: - Front cover: RAL 7035 - Side and cable cover: RAL 7035 (i) ELECTRICAL DATA – 12 kV - 28kV-1min Rated current of copper busbars: 630 A Rated current cable switch disconnector : 630 A Short time withstand current (3 sec) vacuum circuit breaker: 21 kA Rated current for transformer T-off: 630 A Impulse withstand voltage: To earth and between phases: 75 kV Insulation level: - Power frequency 1 min: 28 kV

M & L for plain cement concrete 1:2:4 type B2 (using 40mm graded stone aggregate) in foundations, filling and mass concrete complete all as specified and directed.

The VCB shall have the standard of IEC 62271-100, 630Amps, 11 KV, 50Hz with short circuit current rating 25 KA for 3 secs. The breaking capacity of VCB shall design for 25 KA and making capacity of 62.5 KA peak with maximum temperature rise over ambient shall be within limits as per IEC 2271-100. The contact resistance of main pole<60 micro-ohms, dry-I minute power frequency with stand between line terminal and ground object-28KV rms, between terminals with breaker contact open 25KV rms 1.2/50 micro second full wave impulse between line terminals and grounded object. The spring charging motor shall have 230V AC and charging time required for motor 15 sec (Max). The ground clearance of VCB shall be as per manufacturers GA drawing. The panel shall be designed for floor mounting, free standing, simplex type control and real panel in sheet enclosure with powder coated paint after suitable pretreatment with IP4X protection. The panel shall be fabricated from 2/2.5mm as per type tested design M5 / Aluzinc sheet for side/top/Rear and with 3.15/3mm for front/Gland plate paint shade exterior shade 631 of 15-5. Panel size shall be more than 600mm(width)x600mm(Depth) x 220mm (including 100mm base channel), the CT and PT shal be designed suitable for connecting of 400KVA transformer.

Note: (i) Any other spares/material required for protection of transformer/VCB may be Included as per design parameters. Make of VCB: ABB/SCHNEIDER/SIEMENS or as specified in particular specification. OEM make RMUs are only preferred & accepted (ii) New VCB shall be installed in replacement of OCB. The OCB will be shifted to MES yard. (iii)The quoted rate shall be deemed to include cost of PCC foundation and PCC platform of suitable size 100 mm thick PCC 1:2:4 type B1 (using 20 mm graded stone aggregate) over 100 mm thick hard core complete. (Scope of replacement & shifting of OCB shall be deemed included in rate quoted for the items) iv) Breaker rating for RMU can be 400A/630A based on the transformer rating

Supply & Laying in replacement of HT 11 KV 3 core XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables cross sectional area 95 Sqmm X 3 Core (heavy duty) with aluminium conductor, 11000 volts complete all as specified and directed at site.

M & L for cable jointing kit for 11 KV (Earthed) grade cable for indoor termination cold shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm all as specified and directed.

M & L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm complete all as specified and directed.

Taking up or down u/s steel tubing and connections of sizes 50/80 mm or above

Supply and Fix GI tubing light grade 50 mm bore as in cable protection fixed to poles/walls or laid in trenches/ under road crossing etc all as specified and directed.

Material & Labour for earthing complete with galvanised steel earth plate electrode 60 cm x 60 cm x 6.3 mm thick burried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the earth plate not less than 1.5 m below normal ground level, connected to galvanised earth strip of size 32 x 6 mm by means of bolts, nuts and washers of galvanised iron or steel all as shown in elecrtical plate No 3 of SSR pt I, connected to DB/earthing test point including PCC chamber , RCC cover 50mm thick with CTD 8 mm dia bars, protection pipe, funnel etc including excavation, earth work, disposal of surplus soil and earth strip protection pipe of GI 40 mm bore light grade earth strip upto 7.5 metre including testing on completion all as specified and directed.

Material & Labour for replacement of earthing complete with galvanised steel earth plate electrode 60 cm x 60 cm x 6.3 mm thick burried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the earth plate not less than 1.5 m below normal ground level, connected to galvanised earth strip of size 32 x 6 mm by means of bolts, nuts and washers of galvanised iron or steel all as shown in elecrtical plate No 3 of SSR pt I, connected to DB/earthing test point including PCC chamber , RCC cover 50mm thick with CTD 8 mm dia bars, protection pipe, funnel etc including excavation, earth work, disposal of surplus soil and earth strip protection pipe of GI 40 mm bore light grade earth strip upto 7.5 metre including testing on completion all as specified and directed.

RAVINDRA BROTHERS

M/S - KRUPA ELECTRICALS