Provision of 11 KV Electric Supply from NSB Booster Pump House to Dolphin Hill and Augmentation of Power Supply at NOI, Visakhapatnam

Amount

Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor Type, Floor or Platform Mounted complete with standard fittings, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 250 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class "A" insulation, having Primary Voltage [HT] 11 KV and Secondary Voltage [LT] of 433 Volts, Delta connected on 11 KV Side & Star connected on 433 Volts side, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180-2014, Level-3 with latest amendment including PCC / Brick Masonry Foundation / Platform as per IE Rules, fixing HT / LT Busbar and Cables etc. complete all as specified and as directed and comprising of the following Specification and Fittings: Continuous Rating : 250 KVA No-Load Voltage Ratio : 11 KV / 433 V Tapping on HV [%] : ± 7.5, ± 5, ± 2.5 Phase & Frequency : 3 Phase & 50 Hz Connection : Delta Star Vector Group : DYN 11 Cooling : ONAN Type : Outdoor

Note: The rate quoted is deemed to be including the cost of PCC / Brick Masonry Foundation / Platform as per IE Rules and of size not less than 2.00 X 2.00 X 1,80m made of brick work using Fly Ash bricks built in Cement Mortar 1:6, over PCC Concrete Bed of 10mm thick in PCC 1:4:8, Type D-2, using 40mm graded stone aggregate over 150mm thick Hardcore of gauge not exceeding 63mm of broken stones or boulders, deposited, spread and levelled in layers not exceeding 15 cm thick watered and rolled, 100mm thick PCC 1:2:4 Coping, Type B1, using 20mmgraded stone aggregate over top of the Platform / Foundation, rendering to brick surfaces, 15 mm thick in Cement Mortar 1:4, and finishing the top surface even and smooth without using extra cement, applying Three coats of white washing including necessary earthwork excavation, return filling, removal surplus soil complete all as per manufacturer’s recommendations, as specified and as directed.

Note for Serial Item No. 1: The Transformers shall also be provided with following Terminal Arrangement & Fittings and rate quoted against respective item is deemed to be included for the same: Terminal Arrangement: [a] HV & LV Side: Cable Box [b] Quad furcating cable box with five compression glands for PVC Cable and One additional neutral terminal shall be brought out separately for earthing purpose on LV Side. [c] First filling of new and unused Transformer Oil [IS – 335 Marked], filtered and tested up to 60KV dielectric strength at 2.5mm air gap between testing electrodes. Certification of dielectric strength shall be submitted by the Contractor after filling the oil. Transformer Oil shall be got tested by APEPDCL. [d] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.

Fittings: [a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device. [b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug [c] Undercarriage with four plain rollers [d] Oil filling hole cum air release plug [e] Drain Valve cum Sampling Valve [f] Top Filter Valve with Plug [g] Rating Plate with Diagram Plate [h] Lifting lugs for Transformer [j] Lifting lugs for Core [k] Earthing Terminals [l] Thermometer Pockets [m] Silica Gel Breather [n] Explosion Vent [o] Double Float Buchholz with alarm and trip contacts including control cable of copper conductor of size & length from Marshalling Box to Relay of VCB [p] 150mm size Oil Temperature indicator, dial type with alarm and trip contacts [q] 150mm size Winding Temperature indicator, dial type with alarm and trip contacts [r] Buchholz Relay with 2 Shut-Off Valves [s] Marshalling Box with Double Window [t] OCTC

Supplying, laying and testing HT UG Cable, XLPE insulated, screened insulated, steel strip armoured and pressure extruded PVC bedded, 11000 Volts grade [heavy duty] suitable for Earthed System with aluminium conductor of size 3 Core, 120 Sq.mm conforming to IS – 7098 [Part – II] laid in trenches, fixed to walls or passing through pipes and connecting up complete all as specified and as directed.

Supplying, laying and testing XLPE insulated and PVC sheathed, FRLS, armoured heavy duty underground cable, ISI marked with aluminium stranded conductor 1100 Volt grade of size 3½ Core, 185 Sq.mm cross section suitable for earthed system, laying in trenches / duct / fixed to poles / drawn through pipes / sleeving through pipe in duct, including suitable size Double compression copper stainless steel cable gland, crimping type cable lugs, sockets etc. complete all as specified and as directed.

Earthing complete with Galvanised Steel Earth Plate Electrode 600 X 600 X 6 mm thick burried directly in ground [earth pit not less than 2.25 m deep below ground level] with top edge of Plate not less than 1.50 m below normal ground level connected to 32 X 6mm GI Strip [Earth Lead] and GI pipe 50 mm, Medium Grade for earthing lead protection to the extent of maximum 7.5m, Earth Plate Electrode surrounded by 150mm thick packed layers of Charcoal and Common Salt filled in alternate layers, connected to the Plate by means of GI Bolts & Nuts complete all as per Electrical Plate No. 3 of SSR Part – I, connected to panel / DB including testing on completion including main earthing, Charcoal, Common Salt, PCC [1:2:4, Type B1] Pit with RCC 1:2:4, Type B1 Cover, 50 mm thick with 6 Nos, 8 mm dia TMT bars in both ways, MS frame made with 40 X 40 X 6 mm Angle Iron, MS Funnel with 20 mm bore, medium grade GI Watering pipe, wire mesh, earth work excavation, return filling, removal of surplus soil etc. complete all as specified and as directed.

S & F Earth continuity Conductor or main earthing lead made of GI Strip of size 32 X 6mm, fixed to wall on batten or recess or chases or burried in ground or fixed to poles or any other indicated situation including drawing through GI Pipe for earthing etc. complete all as specified and as directed.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m deep in Soft / Loose soil for laying Cables etc. complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick of excavated soil complete all as specified and as directed. Note: A deduction of 10% shall be made from total computed volume of filling to cater in bulk irrespective of machinery used for ramming.

Removal of excavated material [Soil] to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5 m complete all as specified and as directed.

M & L for Dry River Sand cushioning over and around the cable for cable protection in trenches, levelled and punned down complete all as specified and as directed. Note: The punned down thickness shall be measured for payment.

Supply and lay Bricks, Common Burnt, Clay Building Bricks, Sub–Class "B", Designation 75 in trenches for cable protection complete all as specified and as directed.

Supplying and laying Un–Reinforced Precast Concrete Cable Cover, Class HVP, Type 1 with Peak, size 300mm x 180mm x 40mm complete all as specified and as directed.

Supplying and laying GI pipe, 100mm dia, Light grade for cable protection at road crossing etc. or fixing on wall / poles of any type, secured with clamps complete all as specified and as directed.

M & L for PCC 1:4:8, Type D-2, using 40mm graded stone aggregate as in Foundation, Fillings, Mass concrete, Footings etc complete all as specified and as directed.

Cutting Bituminous Road / Hardstanding etc. as required for Jointing / Laying Cables and Pipeline of width not exceeding 300mm and depth not exceeding 600mm and refilling after laying and making good with PCC 1:2:4, Type B1 using 20mm graded stone aggregate, 100mm thick complete all as specified and as directed.

M & L for Cable End Termination Joint, Heat Shrinkable type, Outdoor type, suitable for 11000 Volts, 3 Core, 120 to 185 Sq.mm, HT, XLPE Insulated, Armoured Power Cable with Aluminium Conductor and testing after jointing complete all as specified and as directed.

M & L for Cable End Termination Joint, Heat Shrinkable type, Indoor type, suitable for 11000 Volts, 3 Core, 120 to 185 Sq.mm, HT, XLPE Insulated, Armoured Power Cable with Aluminium Conductor and testing after jointing complete all as specified and as directed.

Supplying, laying and testing HT UG Cable, XLPE insulated, screened insulated, steel strip armoured and pressure extruded PVC bedded, 11000 Volts grade [heavy duty] suitable for Earthed System with aluminium conductor of size 3 Core, 185 Sq.mm conforming to IS – 7098 [Part – II] laid in trenches, fixed to walls or passing through pipes and connecting up complete all as specified and as directed.

M & L for Straight Through Joint, Heat Shrinkable type, suitable for 11000 Volts Grade, 3 Core, 120 to 185 Sq.mm, HT, XLPE Insulated, Armoured Power Cable Aluminium Conductor and testing after jointing complete all as specified and as directed.

S & F 11 kV, Single Phase, Indoor CT of Ratio 200-100 / 5-5A, Class 1.0 / SP10, Burden 15 VA, 50 Hz, STC Value of 26.3 kA for 1 Sec and conforming to IS - 2705 complete all as specified and as directed.

Supply, Installation, Testing and Commissioning of Indoor Type, totally enclosed, cubicle type, free standing floor mounting type metal enclosed, 11 KV, 1250 Amps VCB Panel Board suitable for 3 Phase, 50 Hz system, with 25 kA / 3 Seconds Short Circuit withstand capacity & BIL tested for 12 kV / 28 kV RMS / 75 kV Peak, suitable to get extended with existing board without adapter panel, Switchgear Panel enclosure shall be of sheet steel preferably Aluzinc, Dust tight, Vermin Proof, with single break, Horizontal Draw Out type breaker with Trip Free Mechanism as per latest standard i.e. IS/IEC 62271-200 as amended up to date and as per Technical Specifications, IP4X for Indoor VCB Panel Enclosure, Indoor VCB Panel shall be suitable for a temperature condition ranging from +40ºC to -5ºC and 95% Humidity, Switchgear Panel shall be Electrically & Mechanically interlocked as per IS/IEC 62271-1, full voltage insulated Copper Busbar with Heat Shrinkable Sleeving, complete with suitable Metering & Protection Devices, breaker featured with mechanical ON-OFF indicator with hand trip device and all accessories such as Shunt Trip Coil, Motorized & Manually Operated Spring Charging Mechanism, Emergency Trip Push Buttons, auxiliary switch of 2NO + 2NC, Interconnections, Space Heaters, Panel Earthing etc. and equipped with following switchgear and accessories including connection suitable for 2 X 630 Sq.mm, XLPE 11 kV cable [Cable entry from bottom] to be connected through heat shrinkable jointing material etc. as required complete all as specified and as directed and as per the manufacturer’s instructions: [a] Bus Coupler 1 No. with adjacent riser comprising the following: [b] 1250 Amps. VCB – 1 Nos [c] Rising Busbar for Internal Connection – 1 Nos. [d] Set of MCBs for Panel AC/DC [e] Colour Coded LED Phase Indicating Lamps for each Phase – 1 Set. [f] TNC Switch, L-R Switch, Pushbuttons for ON-OFF Note: New VCB shall be interchangeable with the existing VCB at site for ease of operation & maintenance.

S & F Castel Key Mechanical Interlock arrangment between both the Bus Coupler in Incomer Switchgear Panel for transitioning of power complete all as specified and as directed.

M & L for providing Electrical Interlocking between the existing Incomers and the Bus Coupler with Control wiring, Relay Setting as per OEM Standard Specification complete all as specified and as directed.

M & L for Earthing complete with Copper Earth Plate Electrode 600 X 600 X 3.15 mm thick burried directly in ground [earth pit not less than 2.25 m deep below ground level] with top edge of Plate not less than 1.50 m below normal ground level connected to Copper Strip of size 25 X 3mm [Earth Lead] and GI pipe 40 mm, Medium Grade for earthing lead protection to the extent of maximum 7.5m, Earth Plate Electrode surrounded by 150mm thick packed layers of Charcoal and Common Salt filled in alternate layers, connected to the Plate by means of GI Bolts & Nuts complete all as per Electrical Plate No. 3 of SSR Part – I, connected to panel / DB including testing on completion including main earthing, Charcoal, Common Salt, PCC [1:2:4, Type B1] Pit with RCC 1:2:4, Type B1 Cover, 50 mm thick with 6 Nos, 8 mm dia TMT bars in both ways, MS frame made with 40 X 40 X 6 mm Angle Iron, MS Funnel with 20 mm bore, medium grade GI Watering pipe, wire mesh, earth work excavation, return filling, removal of surplus soil etc. complete all as specified and as directed.

S & F Earth continuity Conductor or main earthing lead made of Copper Strip of size 25 X 3mm, drawn through and including GI pipe 40 mm bore, Medium Grade, fixed to wall on batten or recess or chases or burried in ground or fixed to poles or any other indicated situation including drawing through GI Pipe for earthing etc. complete all as specified and as directed.

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