SPECIAL REPAIRS FOR AUGMENTATION OF EXISTING 200KVA TRANSFORMER TO 315KVA TRANSFORMER INCLUDING UNDERGROUND CABLE AND ALLIED ELECTRICAL WORKS FOR MIL HOSPITAL THIRUVANANTHAPURAM

Amount

Supply, install, connect, testing and commissioning of three phase indoor type, platform/plinth mounted 315 KVA, distribution transformers, energy efficiency Level 3 (Now level 2 as per amendment No 4 of IS:1180 dt 31 Mar 2022), step down, oil cooled, prime grade core, copper double wound with standard fittings, HT 11 KV/0.433 KV, 3 phase four wire 50 HZ with off load tapping on (+/-)2.5%, (+/-) 5%, (+/-) 7.5% at HT side by hand operated, vary secondary voltage within limit complete all as per IS 1180, part-I, 2014 and IS 2026 part-II. HT & LT side with terminal boxes, The maximum temp rise 40 deg in oil and 45 deg in HV/LV winding when measured by the resistance method after continuous full load run in ambient temperature of 50 deg. Transformer should have cable box on LT side and brass bushing on HT side , oil temperature gauge, dehydrating breather with first fill of dehydrating silica gel, oil conservator tank, explosion vent, rating and terminal marking plate, oil level gauge, oil drain and filter valve, independent earth point and neutral fittings, earth terminal at body base, voltage regulation should be as per IS and limit of temp rise after continuous full load run as specified in SSR part-I and IS -1180 Part I (revised) shall be suitably adjusted to suit the maximum ambient temp prevailing at site all as specified comprising with the following specifications :-

(i) Lifting lugs, top cover lugs. (ii) Earthing terminals. (iii) Conservator with oil gauge glass, oil filling hole, with plug & drain plug. (iv) Transformer drain valve (v) Uni directional plain roller (vi) Explosion vent with diaphragm (vii) Thermostat pocket (viii) Air vent plug (ix) Silica gel breather (x) Rating & diagram plate inspection cover terminal making plate (xi) Cooling radiator (xii) LV neutral bushing brought out for external earthing (xiii) First fill of EHV grade transformer oil

(xiv) No load loss as per standard (subject to IS tolerance) (xv) full load loss as per standard (Subject to IS tolerance) (xvi) Impedance is 4.75% (Subject to IS tolerance) (xvii) Vector group DYN (xviii) Off circuit tap changer (xix) Jacking pads (xx) Danger Notice board (xxi) Inspection cover (xxii) Cable entry box Note: (i) Any items/ parts of transformer damaged during transportation/ installation shall be made good by the contractor at his own expense. (ii) Cost of disconnecting all cable connections and shifting of existing transformer of any capacity from site to MES Store Yard is deemed to be included in the unit quoted rate.

Material and labour for Earthing complete with Galvanised steel earth plate electrode 600 x 600 x 6 mm thick buried directly in ground (in vertical position) earth pit not less than 2.25 mtr below normal ground level with the top edge of the earth plate not less than 1.5 m below ground level and connected to GI earth strip 32 x 6 mm by means of bolts, nuts, check nuts, and washers of galvanized iron including PCC pit & cover with suitable handle, including necessary excavation and earth work in any type of soil, 20 mm dia medium grade galvanized steel tube for watering with one end fixed with suitable funnel and wire mesh, 40mm bore medium grade galvanized steel tubing of length 7.5metre for drawing earth lead GI strip protection & common salt, charcoal in alternate layers etc. complete all as shown in EP No 3 of SSR Part -I and testing on completion including taking out existing one etc complete all as specified and as directed. Note: GI strip beyond 7.50m length shall be measured and paid separately.

Supply, lay in trenches or fixed to wall / pole or passing through pipes or road crossing, testing and commissioning of HT XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with aluminium conductor, 6.35/11KV (E) grade, suitable for earthed system, with aluminium conductor of size 95 Sqmm 3 core including taking down unserviceable HT cable of any type / size/ description, etc complete all specified and as directed. Note: Excavation & Earth work shall be measured and paid separately.

Supply and fix cable jointing kit for 11 KV grade cable for indoor termination heat shrink type joint complete with jointing mtrl and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 95 sqmm complete.

Supply, lay in trenches or fixed to wall / pole or passing through pipes or road crossing, testing and commissioning of LT XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) 1100 volt grade with stranded aluminium conductor, of the following sizes with suitable size of cable glands etc complete all specified and as directed. Note : Excavation & Earth work shall be measured and paid separately.

400 Sqmm x 3.5 core

240 Sqmm x 3.5 core

185 Sqmm x 3.5 core

120 Sqmm x 3.5 core

Material and labour for GI tube light grade with all fittings, complete, fixed to walls, pole ceiling or laid in trenches for cable protection all as specified and as directed for following sizes:-

100mm bore

80mm bore

50mm bore

Material and labour for HT Danger notice plate of size 250mm x 200mm, 1.6mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bone in signal red colour and fixed with MS clamps, bolts and nuts of approved size complete all as specified and as directed.

Supply and replace cable route indicator made out of cast iron 100mm dia pipe duly embossed as HT 11 KV with 32mm x 6 mm MS angle welded and fixed with PCC 1:3:6, type C1 using 20mm graded stone aggregate bed blocks including taking out existing old unserviceable cable route indicator etc complete all as specified and directed

Supply and replace cable route indicator made out of cast iron 100mm dia pipe duly embossed as LT, 440V with 32mm x 6 mm MS angle welded and fixed with PCC 1:3:6, type C1 using 20mm graded stone aggregate bed blocks including taking out existing old unserviceable cable route indicator etc complete all as specified and 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 conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 32x6mm galvanised iron strip complete all as specified and as directed.

Supply, install, test and commissioning of LT panel factory made and tested (including CPRI type test certified), LT feeder pillar box, Indoor type, platform mounted, free standing type, suitable for 415 volts 3 phase 4 wire, 50 HZ AC supply system with powder coated finish, front opening type, modular & compartmentalized. The panel shall be dust, weather and vermin proof, IP 65 class protection and made of CRCA MS sheet 2.0 mm thick for outer shell and 2 mm thick for inner shell having TPN Aluminium bus bars of rating 1000 A supported on SMC insulators , bottom base channel of MS section not less than 100 mmx 50 mm x 5 mm thick , entire panel shall have a common aluminium earth bar of size 32 mm x 6 mm at the rear with 2 nos earth stud, solid connections from main bus bar to switch gears with required size of Aluminium/copper bus bars and control wiring with min 1.5 sqmm PVC insulated copper conductor cable, including taking out the old existing unserviceable LT panel. The panel shall be mounted on suitable PCC foundation as per manufactures standards. Note: The rate quoted is deemed to be included the cost of PCC foundation and marking of incoming/ out going MCCBs.

Supply, install, test and commissioning of LT panel installing, testing and commissioning, factory made and tested (including CPRI type test certified), LT feeder pillar box (KIOSK), indoor type, platform mounted, free standing type, suitable for 415 volts 3 phase 4 wire, 50 HZ AC supply system with powder coated finish, front opening type, modular & compartmentalized. The panel shall be dust, weather and vermin proof, IP 65 class protection and made of CRCA MS sheet 2.0 mm thick for outer shell and 2 mm thick for inner shell having TPN Aluminium/Copper bus bars of rating 800 A supported on SMC insulators, bottom base channel of MS section not less than 100 mmx 50 mm x 5 mm thick, entire panel shall have a common aluminium earth bar of size 25 mm x 5 mm at the rear with 2 nos earth stud, solid connections from main bus bar to switch gears with required size of copper bus bars and control wiring with minimum 1.5 sqmm PVC insulated copper conductor cable, including taking out the old existing unserviceable LT panel. The panel shall be mounted on suitable PCC foundation as per manufactures standards. Note: The rate quoted is deemed to be included the cost of PCC foundation and marking of incoming/ out going MCCBs

Supply and fix Automatic Power Factor Correction (APFC) Panel for 3 Phase, 415 V & 50 Hz indoor type system of capacity 175 KVAR with APFC relay (IPFC CS 1001) 1 CT, incoming MCCB of capacity 200 A, including suitable contactors, MCB SP, MCB TPN, indicators for RYB, bank ON/OFF, system internal wiring, capacitors with 6 steps (2 x 50KVAR, 2 x 25 KVAR, 2 x 12.5 KVAR), powder coated panel CPRI approved, IP 66 protection dust and vermin proof including taking down the old existing unserviceable LT panel etc complete all as specified and as directed.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m in depth and getting out in soft/ loose soil for laying cable/ pipe, trimming the sides forming bottom surface to required levels complete all as specified and as directed.

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

Removing excavated soil not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

Supply and lay bricks, common burnt clay building bricks, sub-class 'B' for protection of cable abutting each laid dry flat width equal to the length of cable cover etc complete all as specified and as directed.

Supply and lay un-reinforced precast concrete cable cover, class HV, type 1, flat unreinforced of size 300mm x 180mm x 40mm for protection of cable abutting each laid dry flat width equal to the length of cable cover etc complete all as specified and as directed.

Supply and spreading riddled clean dry earth soil sand free from stone and other impurities in trenches for cushioning including levelling and hand punning to under ground cable on top and bottom of cable all as specified and directed. Note: Only punned thickness will be measured and paid.

Shree Ayyappa Engineering

ABM ELECTRICALS