AUGMENTATION OF HT DISTRIBUTION SYS AND SUB STN CONT GEARS AT DB AREA HQ SUB STN UNDER GE CHENNAI.

Amount

Supply , installation, testing and commissioning of indoor type SF6 insulated switch board consigning of 1 incomer and 3 Outgoings panels with possibility of future extension at one side,capacity 11 KV, 1250 Amp, 3 Phase, 3 wire, 50 Hz, having a rupturing capacity of 26.3 KA for 3 sec, with circuit breaker and three position disconnector (ON-OFF-EARTH) enclosed within one SF6 gas filled SS304 grade stainless steel tank of 2.5mm thick and Copper Busbar 1250A placed outside gas tank with screened solid silicon encapsulated, metal clad , flush front, maintenance free with Electrical and Mechanical interlock. The arc interruption of the switchgear shall be by vaccum interrupters (Should be GIS manufacturer's own make), along with three position ON-OFF-EARTH isolation switch in series to connect to busbar. There should not be any gas handling at site installation and future expansion. Each panel /feeder shall be floor standing type, should have separate gas tanks, seperate closing & tripping mechanism (Manual & aotorized) for VCB, Drive mechanism for 3 position switch (Manual & Motor operated) as per the folloeing specification . Each cable termination area must be equipped with wireless sensors and all the sensors must be hooked up to a display mounted on the switchboard. There shall be facility to take the temperature monitoring system to SCADA. Make of GIS & Panel: ABB /SIEMENS/ SCHNEIDER INFRASTRUCTURE

S&F Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm complete all as specified and as directed.

Supply and Lay XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavyduty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 95 sqmm 3 core complete all as specified and as directed.

M&L for Earthing complete with galvanised steel earth plate electrode of size 60cm x 60cm x 6 mm thick burried directly in ground( earth pit not less than 2.25 m deep below the normal ground level) with top edge of the plate not less than 1.5m below normal GL connected to GI earth strip of size 32x6 mm by means of bolts, nuts, check nuts washers of GI or steel all as shown in electrical plate No-5 of SSR Part I connected to Machinary equipments installed in power house/sub station complete all as specified including testing on completion. Note : The unit rate quoted shall be inclusive for earth work excavation in any type of soil ,earth chamber with PCC (1:3:6) type C1 ,Chamber Cover slab 50mm with RCC 1:2:4 type B-1 with and including reinforcement 8 mm dia CTD bars @ 150mm C/C both ways ,provision of funnel with 15mm bore GI watering pipe 40mm dia ,GI protection pipe wire mesh and copper lugs complete in addition to item No 1(a) to (e) of preamble ( Notes) Under sub heading earthing specified on SI page NO-389 of SSR Part-II .

Excavation in trenches not exceeding 1.50m wide and not exceeding 1.50M in depth for foundations etc or for shafts, wells cesspits manholes, pier holes etc. not exceeding 10 Sqm on plan and getting out in soft/loose soil complete all as specified and as directed.

M&L for Plain cement concrete 1:3:6 type C2 (using 40 mm graded stone aggregate) as in foundation filling and mass concrete complete all as specified and as directed.,

M&L for fly ash brick work with sub class B bricks straight or curved on plan exceeding 6M mean radius built in CM 1:4 complete all as specified and as directed.

M&L for TMT bar 10mm dia and over cut to length, bent to shape required including cranking, bending spirally for hooping for columns, hooking ends and binding with and including ms wire (annealed) than 0.90mm dia complete all as specified and as directed.

M&L for form work to sides and soffits of floor or roof beams haunchings, girders, bressummers lintels etc rough finished surfaces of concrete complete all as specified and as directed.

M & L for reinforced cement concrete 1:1.5:3 type A1 using 20mm graded stone agggregate as in beams, cantilevers, bressummers, lintels over 1.5m span complete all as specified and as directed.

M&L for 15 mm thick rendering in CM 1:6 on fair faces of brick work or concrete surfaces finished the surfaces even and smooth without using extra cement complete all as specified and as directed.

EVEREST ENGINEERING WORKS (BID ID -3152304)

PSK Enterprises (BID ID -3157291)