SPECIAL REPAIRS TO LIGHTNING CONDUCTORS, EARTHINGS, AND REPLACEMENT OF TWO POLE STRUCTURES TO RING MAIN UNIT AT 11 KV SUBSTATION AND CONNECTED WORKS AT MIC AND S UNDER GE (S) AHILYANAGAR

Dismantling of Old GI strip and Aluminium Strip complete all as specified and directed.

Dismantling of Old Air tremination rod and Test Point terminals complete all as specified and directed.

Dismantling old existing MS cross arms of any type/shape all as specified and directed.

Dismantling steel poles/ struts, any size all as specified and as directed.

Dismantling air break gang operated switches /DO fuse set and lightning arrestors including Insulators and operating mechanism all as specified and as directed.

Dismantling of earthing and taking out GI Earth plate and GI strip all as specified and as directed.

S & F in replacement Air termination, single pointed, copper rod 12mm dia and 300mm long all as specified & directed by Engg-in-charge.

S & F in replacement Test point terminal block made of gun metal or phosphorus bronze size 75x75x25mm drilled and screwed including 3 nos. 8mm dia 25mm long hex. head screw all as specified & directed by Engg-in-charge.

S & F in replacement Copper strip 20 x 3.0mm with saddles and fixing screws etc.for roof conductors and down all as specified & directed by Engg-in-charge.

Supply & Fix in replacement light grade 40 mm GI pipe for erraction of air termination Rod.

M & L in replacement Earthing complete with Copper earth plate electrode 60 cm X 60 cm X 3.15 mm thick buried directly in ground in any type of strata (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5 mtr below ground level connecting to the copper strip 20 x 3 mm, by means nut bolt, nuts, check nuts and washer of the GI Earth wire protected by provision of GI light grade pipe 40 mm incl provision of concrete pit in PCC (1:2:4) type B-1 using 20 mm graded stone aggregated with 40 mm thick cover with RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg / Sqm) and frame of angle iron 25mm X 25 mm X 3mm with lugs 2 Nos and with 6 mm dia MS bar handle made to shape, GI light grade 20 mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge of earth plate, common salt and charcoal filling, taste point made out of phosphorus bronze with fixing arrangement, funnel, wire mesh and earth work in hard/dense soil, returning filling in and removal of surplus soil to a distance not exceeding than 50 mtr, all as per electric plate No 3 of SSR Part I 2020 and connection to earth test point all as specified incl testing on completion”.Note:The unit Rate includes earth strip and protection pipe up to (max 7.5 metre) from earth plate/earth point/test point.

Supply, install, testing, commissioning complete 11KV Ring Main Unit for 3 Nos (02 for incoming and 01 Nos outgoing) breaker of capacity 630 Amps each, outdoor type, copper bus bar of 50x10mm with rupturing capacity of 350MVA with enclosure for mounting 02 Nos SF6 Breakers and 01 Nos Load Break Switch with interlocking arragement as specified in IE Rules & for clearance, safety and operation inside the enclosure, CPRI approved including cable termination chamber. SF circuit Breaker shall be front access. rating for single SF6 circuit breaker are as follows:- (Note: Rates shall be inclusive with 02 Nos SF6 Circiut Breakers for incoming and 01 Nos outgoing load break switch) (i) Circuit breaker, Rated Current: 630A, closing and Tripping coil: 240V DC, Spring Charging motor : 230V AC, STC:26.3KA for 03 sec (ii) BIL: 12/28/75KVP (iii) CT Ratio- 200-100/5-5A (iv) Core 1 : Burden-10VA, class:1.0 (v) STC :25KA for 1Sec (vi) BIL: 12/28/75KVP (vii) Potential Transformer with 3.15A HT Fuse ( Fixed type) (viii) PT Ratio : 11KV/RT3/110/RT3/110/3 (ix) Core 1 : Burden-50VA, class:1.0 (x) Core 2 : Burden-50VA, class:3P (xi) BIL: 12/28/75KVP (xii) V.F 1.2 are continuous & 1.9 for 8hours (xiii) Protection Relay

Item No 12 Contd/…. (a) 3 over current +1E/F Relay (RS-485 communicable) (b) Protection 50,51, 50N.51N, 86 (c) CT Secondary-5A (d) Mounting : Flush mounting (e) Aux supply : 24V DC in built (xiii) Master Trip Relay ( Hand Reset Electromechanical type) (a) Protection-86 (b) Mounting-Flush Mounting (c) Aux supply : 24V DC (xiv) Metering Equipment (Incoming & Outgoing) (a) Digital Multifunction Meter (RS-485-Communicable), Class-1.0, Cut out size 92x92, Aux Supply : 230V AC (b) Digital Voltmeter, Class 1.0,Cut out size 92x92, Aux Supply : 230V AC & 12V DC (xv) Accessories (a) TNT Switch, Contacts: 02 NO & 2NC (b) Local Remote Switch, Contacts: 02 NO & 2NC (c) Space heater 100W (d) Thermostat Temperature Range: 30-90, 15A 3 Pin socket for 230 V AC Supply Current 1-A (e) Toggle switch, Push button for Trip circuit Supervision check, Contacts:02 NO (f) TB for CT & PT circuit, Disconnecting type (g) Type KUTSD6 (h) TB for control circuit, Non-Disconnecting type (j) Aux Voltage :230V AC (k) Hooter, Aux Voltage :230V AC

Item No 12 Contd/…. (l) Battery Charger 5A (m) 230V AC I/P & 24 V DC O/P (n) Battery 12 V DC, 7AH (xvi) Indication Lamp (a) Red colour lamp, 24 V DC : For Breaker ON (b) Green colour lamp, 24V DC : For Breaker Off (c) Blue colour lamp, 24 V DC : For Breaker Spring Charge (d) Amber colour lamp, 24 V DC : For Auto Trip (e) White colour lamp, 24 V DC : For Trip Circiut Supervision (f) Red colour lamp, 63.5 V AC : For R Phase Healthy (g) Yellow colour lamp, 63.5 V AC : For Y Phase Healthy (h) Blue colour lamp, 63.5 V AC : For B Phase Healthy (xvii) Breaker Rack in and out handle (xviii) Testing (a) Factory Tests shall be carried out in presence of Rep of Accepting Officer as per IEC standard-62271-100 /other relevant standards.contractor has to be inform the same n advance to the dept. (b) Following test reports for 02 Nos SF6 breaker shall be submitted before applying payments:-(i) Insulation resistance test(ii) Operation time test(iii) Contact resistance test(iv) Pre-insertion resistance (PIR) test (If applicable)(v) SF6 gas leak test(vi) High Voltage withstand test(vii) Secondary test to ensure the proper functioning of the live line indicators, fault passage indicators and relay(vii) Mechanical Operation Test (i) PCC founddation as per OEM drawing/site requirements for RMU to be done in this item rate by contractor (ii) Contractor has to arrange T&P for pre-commissioning testing.

Supply, laying and testing XLPE insulated, screened, PVC bedded galvanised steel strip armoured electric power cable (Heavy duty) with aluminium conductor, 11000 Volts grade lay in trenches, ducts, along pole, along Transformer cross sectional area of size 120 Sqmm 3 Core complete all as specified and directed by Engr-in -Charge.

M&L for HT Cable end termination box suitable for 11000 Volts grade 120 Sqmm 3 Core XLPE 11KV cable, indoor, heat shrinkable type with all accessories complete all as specified and directed.

M&L for HT Cable end termination box suitable for 11000 Volts grade 120 Sqmm 3 Core XLPE 11KV cable, Outdoor, heat shrinkable type with all accessories complete all as specified and directed.

Note :- Schedule of Credit of Amount Rs7430.00 shall be deducted from total amount.