Provision of HT 11 KV VCB at CG family accommodation Royapuram and special repairs and replacement of HT two pole structure with HT outdoor type RMG at CG MD ACCN Royapuram under GE (I) (CG) Chennai

Amount

Supply, install , test and commission of HT 11 KV, 630 Amps, 26.3 kA Outdoor Type Vacuum Circuit Breaker (VCB) Standalone panel of 3 phase, 50 Hz totally enclosed and horizontal drawout type VCB comprising of the following :- (A) VACUUM CIRCUIT BREAKER : (a) Horizontal drawout type VCB fitted with manual / electric motor operated spring charging mechanism with 230 Volts (b) Spring charging AC motor & motor control switch, 230V mechanical ON/OFF indicator operation counter. (c) Automatic safety shutters & push button 11 KV, 630 Amps, 25 KA - 01 No. (d) Shunt trip coil 110 V DC - 01 No (e) Closing coil 110V DC - 01 No (f) Spare auxiliary contact 4 NO + 4 NC (g) Antipumping feature 110Volts, DC (h) DC power source 230Volts, AC to 110Volts DC - 01 No. (j) Surge arrestor 9KV 10KA - 01 No

(B) POTENTIAL TRANSFORMER: (a) Primary 11KV/Root3, Secondary 110V/Root3, Core 1M - Cl 1.0, Core 2 Pole, Capacity 50 VA (b) BIL-11/28/75 (C) CURRENT TRANSFORMER: (a) Single phase, resin cast, dry type current transformer of ratio : 15/5-5A - 03 Nos. (b) Core 1 : for meter Cl -0.5, 15VA. (c) Core 1 : for protection Cl - 5P10, 15VA. (d) STC rating : 26.3kA (e) BIL-11/28/75 (D) PROTECTION RELAY : (a) Master trip relay 86 - VAJH13 (b) Auxillary transformer protection relay (c) Feeder protection relay OC/EF - (50/51) (50N/51N) communication protocol RS 485 type Non-draw out.

(E) MONITORING DEVICES : (a) Ammeter (b) Voltmeter (c) Indication lamp VCB ON/OFF/TRIP/SCH/TCH (d) RYB indication lamps (e) 8 Windows Annunciator + Hooter

(F) The VCB shall have the following MANDATORY ACCESSORIES :(CONTROL SWITCHES / PUSH BUTTONS): (a) Breaker control switch (Close-Neutral-Trip)- 01 No. (b) Emergency push button - 1 No. (c) Local remote control switch (d) Toggle switch - Heater ON/OFF (e) Power packup Rating : 230V AC 110V DC. (d) Plug & socket with switch - single phase (e) Cubclie illumination 4W LED type (f) Heater - 230V AC, 80W (g) Thermostat (h) Control MCBs - AC/DC (j) Resistor (k) Disconnecting type terminal box (l) Non disconnecting type terminal block (m)FRLS PVC insulated copper cable of size 3 core,2.5 Sqmm for CT wiring (Make as recommended by OEM) (n) FRLS PVC insulated copper cable of size 3 core 1.5 Sqmm for PT wiring/AC/DC wiring (o) Communication cables (p) Wiring accessories (q) Panel accessoreies (r) Epoxy insulators

(G) BUS BAR : Aluminium (a) Main BB connector (Size 2Rx 40 x 10) Rating 630 Amps (b) BB Inter connection (Size 2R x 40 x 10) Rating 630 Amps (c) Earth connection (Size 1R x 40 x 6) Sleeve : PVC sleeves (H) PANEL CONSTRUCTION BY CRCA Sheet (a) Ingress protection IP 65 outdoor type (b) Sh. thickness of Non load bearing : 2mm thick (c) Sh. thickness of load bearing : 3mm thick (d) Sh. thickness of side cover : 1.6mm thick (e) Mild steel Based frame to be provided (f) Incoming at bottom and Outgoing : bottom of side adapter (g) Paint of the VCB : RAL 7032 type Colour : Siemens Grey shade NOTE :- 1. Fault protection type (a) Phase to phase : 1.5 Sec (b) Phase to earth : 0.05 Sec (c) The manufactureres test certificate shall be submitted before installation and testing of VCB at site. (d) All accessories in respect of VCB as recommended by OEM.

Supply, lay and test cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts grade, of size 3 core 95 sq mm complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for in door termination, heat shrink type, joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Aluminium conductor cable of size 70 to 95 Sqmm complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for out door termination, heat shrink type, joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Alluminium conductor cable of size 50 to 95 Sqmm.complete all as specified and as directed.

Material and labour for Earthing with Galvanised iron earth plate electrode 600mm x 600mm x 6 mm thick buried directly in ground (earth pit not less than 2.25 metre deep below normal GL) with top of earth plate not less than 1.5 metre below GL connected to GI earth strip 32 x 6 mm connected to earth plate electrode by means of GI nuts, bolts & washers earth wire protected with & including 40 mm dia light grade ISI marked GI protection pipe not less than 7.5 metre long all as shown in electrical plate No 3 of MES Schedule Part I, with & including; PCC 1:3:6 type C1 pit with cover of RCC 1:2:4 B1 reinforced with welded steel wire fabric not less than 4 Kg per Sqm watering arrangements with 20 mm GI medium grade pipe ISI marked , GI funnel with GI wire mesh, filling with mixture of common salt & charcoal, necessary excavation and earth works in any type of soil, including test point, testing & connecting complete all as specified and as directed by GE. Note : The rate quoted shall be inclusive of 32 x 6mm GI earth conductor upto a length of 7.50mtr from the earth pit.

Disconnecting electric supply from electric sources and taking down two pole structure (11metre long PCC Poles , 2 Nos) with GOD, DO fuse, LA and cross arms / angles / brackets nut, bolts complete with all fittings including necessary excavation and returning filling complete without damaging any other equipments and making good the surface to match with existing surface and dismantled unserviceable items taken as credit complete all as specified and as directed . Note: (i)The inventory of the HT 11KV structure and connected items to be prepared and submitted to Engr-in-charge. (ii) Before the dismantling of two pole structure ,shutdown shall be taken from TNEB in consultation with department..

All as per item No 06 here in before but HT 11KV UG cable any size including necessary excavation and returning filling complete.

Supply, test ( Before and after installation throughTNEB) and commission outdoor Ring Main Gear (RMG) 11KV, 630Amps, 26.3kA Incoming 2 LBS & 1 Outgoing VCB (Panel 1 & 3 incoming and Panel 2 Outgoing): comprising of the following :- (A) VACUUM CIRCUIT BREAKER : (a) Manual / motor operated spring charging mechanism with 230 V AC motor and motor control switch, shunt trip coil of 110V DC, closing coil of 110 V DC, auxiliary contact 4NO + 4NC, mechanical ON/OFF indicator, mechanical operation counter, anti pumping feature, automatic safety shutters and push button - 01 No. (B) SWITCH GEAR - LOAD BREAK SWITCH : (a) 11 kV 630 A, 500 MVA, air / load break switch with earth switch, with 2NO + 2NC auxiliary contact, spring charged mechanism manually operated - 02 Nos. (b) Earth switch provided with fixed type (C) CURRENT TRANSFORMER: Single phase, resin cast, dry type current transformer of suitable ratio-- 15-5A, core 1: Cl. 0.2S / 15VA for metering core 2: Cl. 5P20 / 15VA for protection-03 Nos

(D) POTENTIAL TRANSFORMER: (a) 11 KV/ Root 3/110 V/Root 3 – three phase 3 Limb 50 VA per phase, class 0.2 resin cast potential transformer complete with HT/LT HRC fuses draw out type with sealing arrangement - 01 No. (b) Secondary 1-1A (E) PROTECTION RELAYS: (a) Master trip relay 86 (b) Feeder protection relay OC/EF - (50/51) (50N/51N) Communication protocol : RS 485 Type : Non-draw out) (E) PROTECTION RELAYS: (a) Master trip relay 86 (b) Feeder protection relay OC/EF - (50/51) (50N/51N) Communication protocol : RS 485 Type : Non-draw out) ((E) MONITORING DEVICES : (a) Ammeter (b) Voltmeter (c) Provision of TVM only (d) Indication lamps VCB ON/OFF/TRIP/SCH/TCH (e) Indication lamps LBS ON/OFF ES ON/OFF (f) RYB indication lamps (g) Voltage detecting insulator + Monitor

(F) MANDATORY ACCESSORIES :(CONTROL SWITCHES / PUSH BUTTONS): (a) Breaker control switch (Close-Neutral-Trip)- 01 No. (b) Emergency push button - 1 No. (c) Local remote control switch (d) Test terminal block (e) Toggle switch - Heater ON/OFF (f) Door limit switch (g) Power packup Rating : 230V AC 110V DC. (h) Surge arrester 9kV, 10kA (j) Plug & socket with switch - single phase (k) Cubclie illumination 4W LED type (l) Heater - 230V AC, 80W (m) Thermostat (n) Control MCBs - AC/DC (o) Disconnecting type terminal box (p) Non disconnecting type terminal block (q)FRLS PVC copper cable of size 3 core, 2.5 Sqmm for CT wiring (r) FRLS PVC copper cable of size 3 core, 1.5 Sqmm for PT wiring/AC/DC wiring (s) Communication cables (t) Wiring accessories (u) Panel accessoreies (v) Epoxy Insulators

G) BUS BAR : Copper (a) Main BB connector (Size 1Rx 50 x 10) Rating 630 Amps (b) BB Inter connection (Size 1R x 50 x 10) Rating 630 Amps (c) Earth connection (Size 1R x 50 x 6) Sleeve : HT sleeves (H) PANEL CONSTRUCTION BY CRCA Sheet (a) Ingress protection IP 55 outdoor type (b) Sh. thickness of Non load bearing : 2mm thick (c) Sh. thickness of load bearing : 3mm thick (d) Sh. thickness of side cover : 1.6mm thick (e) Mild steel base frame to be provided (f) Incoming at bottom and Outgoing : bottom of side adaptor (g) Paint of the VCB : RAL 7032 type Colour : Siemens Grey shade NOTE :- 1. Fault protection type (a) Phase to phase : 1.5 Sec (b) Phase to earth : 0.05 Sec (c) All manufactureres test certificate shall be submitted before installation and testing. (d) All accessories in respect of VCB as recommended by OEM. (e) RMG shall be tested by TNEB Engineers at TNEB Lab/Manufacturer premises. (including to and pro transportation) Necessary liason with TNEB Officals and cost of testing shall bedeemed to be included in the rate quoted for the above item by the contractor.) (f) Minor changes in CT/PT ratio as per requirement of TNEB if required and rates shall bedeemed to be included in the rate quoted for the above item by the contractor

Supply and fix Microprocessor based three phase electronic tamper proof HT energy meter with optical communication port, accuracy class 0.5 rating 3 x 110 V, 1/5 A conforming to IS: 13779. complete all as specified and as directed .

Material and labour for Brickwork with fiyash bricks, straight or curved on plan exc 6m mean radius built in Cement mortar 1:4 complete all as specified and as directed .

Material and labour for Cement concrete in foundations, filling and mass concrete Type B2 1:2:4 (40 mm graded aggregate) complete all as specified and as directed .

Material and labour for Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in to conduit /pipe or fixed to poles of size 32 x 6mm galvanised steel strip complete all as specified and as directed .

Re-lay and connecting of underground HT 11KV Cable retrieved from Item No.7 mentioned above

Excavation in trenches n.exc 1.5m wide and n.exc 1.5m depth and getting out in soft/ loose soil for laying UG cables, pipes etc complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers n.exc 25cm , soil obtained from excavation complete all as specified and as directed.

Removing excavated surplus soil n.exc 50m and depositing where directed at a level n.exc 1.5m above the starting point complete all as specified and as directed

Supply and spread clean M sand in trenches including levelling, punning for cushioning of cables complete all as specified and as directed. Note : Punned thickness of sand cushioning only shall be measured and paid.

Supply and lay Reinforced pre-cast concrete cable cover, class EHV, type-1, with peak, size 450mm x 230mm x 50mm complete all as specified and as directed.

Material and Labour for laying and filling of Graded coarse aggregate of Size 40mm near HT installation complete all as specified and as directed.

Supply ,install ,test and commission of 03 Nos of single ratio CT Ratio:5/5-5A,Accuracy:C1:0.2s Class/C2 : 5P 20,Burden : C1:5VA/C2 : 15VA including taking down existing CT from RMG at BUM Royapuram complete all as specified and as directed.Make:Megawin Notes: (i) CT's shall be tested by TNEB Engineers at TNEB lab.Necessary laison with TNEB officials and cost of testing shall be deemed to be included in the rate quoted by contractor. (ii) All manufacturers test certificate shall be submited before installation and testing. (iii) Minor changes in CT ratio as per requirement of TNEB if required and rates shall be deemed to be included in the quoted rate for the above item by the contractor

Ravi enterprise

lakshmibuilders