Special Repairs to HT 11 KV FDR and Allied Switchgears at INS Dega, Visakhapatnam

Amount

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.

Supplying and laying un–reinforced Precast Concrete Cable Cover, Class HV, Type 1, Flat, of 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.

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.

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, 240 Sq.mm conforming to IS – 7098 [Part – II] laid in trenches, fixed to walls or passing through pipes and connecting up including taking down old HT Cables of any description complete all as specified and as directed.

M & L for Straight Through Joint, Heat Shrinkable type, suitable for 11000 Volts Grade, 3 Core, 240 to 300 Sq.mm, HT, XLPE Insulated, Armoured Power Cable 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.

Supply, install, testing & commissioning of Factory Made 11 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Motorized, Outdoor, 8 Way RMU Consisting of 2 Nos VCB Incoming, 2 Nos VCB Outgoing for Feeder and 4 Nos VCB Outgoing for Transformer complete all specified and as directed and shall comprise of the following: [A] RMU shall be 11 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Motorized, Outdoor, 8 Way RMU, Right side Extensible with Air Insulated Bus Connected Metering unit, Type tested in line with latest IEC Standards, suitable for operations at a height up to 1000 Meters above sea level and at 40ºC Ambient Temperature without any de-rating, Switchgear and Busbar shall all be contained in a Stainless Steel Enclosure [Minimum 2mm thick AISI 441 Grade] filled with SF6 at 0.3 Bar [300 hPa] Relative Pressure, RMU Tank shall provide Full Insulation and Switchgear shall be insensitive to the environment with Degree of Protection of IP67 immersion for 30 minutes as per IEC Standard 60529, Switchgear Operating Mechanism shall have an IP2X Protection and Cable Chamber shall have IP3X Protection, Outer Enclosure shall be IP 54 type tested, Powder Coated with Pure Polyester Based Paint, suitable for the site installation conditions, Accidental Overpressure due to an Internal Arc is limited by the opening of the safety valve, at the bottom of the metal enclosure, away from the operator, Plug in type of extensibility must be provided and coupling busbar should not be exposed to air to avoid oxidation of busbars. Extension of cubicle shall require 450mm to handle and the gap between the coupled RMU’s must be within 10mm.

[B] Vacuum Circuit Breaker [VCB], comprising of the following: [i] 11 KV, 630 Amps, 21 kA VCB with Manual / Motorised Spring Assisted Mechanism and Series Trip Coil – 1 No, [ii] Load Break Switch with Built-In Earth Switch – 1 No [iii] Position Indicator through clear front mimic in line with IEC 62271-103 – 1 No [iv] Self Powered Relay with O/C, S/C, E/F Protection. Relay shall have a Front USB / RS485 / RS232 Port for Laptop Interface / Modbus Communication, LCD Display, 10 Event Records, 5 Fault Records, min 2 setting group and keypad for setting parameters for the relay – 1 No [v] CT Ratio 200-100/1-1A for Incoming, 200-100/1-1A for 2 Nos Feeder Outgoing and CT Ratio 100-50/1-1A, 4 Nos Transformer Outgoing, Class - 1.0, 2.5VA for Metering and Class 10P10, 2.5 VA for Protection – 1 Set [vi] Live Cable Indicator with indication at the Front and Three Inlets to check the Synchronization of Phases – 1 No [vii] Cable Termination Bushing suitable for up to 1 Run, 3 Core, 300 Sq.mm, XLPE Cable – 1 Set [viii] Cable Termination Cover Boots [Push on type] – 1 Set [ix] Fault Passage Indicator FPI. [x] Circuit Breakers shall have Two Positions: Open or Disconnected and Closed. A separate and independent 3 Position Earthing Switch and disconnector shall be fitted to open and earth the cables in such way that interlocks prevent all unauthorised operations. An operating mechanism shall be used to manually close the circuit breaker and charge the mechanism in a single movement. An independent mechanism shall be fitted for the 3 Positions Earthing Switch and Disconnector Circuit breaker shall be fitted with a local system for manual tripping by an Integrated Push Button. There shall be no automatic reclosing. Circuit Breaker shall have a min of 2000 Mechanical and Electrical Operations and 50 Nos Short Circuit Operations, Disconnector and Earth Switch shall have a minimum of 1000 [M1] Mechanical Operations , 100 Electrical Operations at rated current and 5 Nos Operations at Rated Short Circuit Current.

[h] Remote Database downloading of FRTU from Master Station from SCADA/DMS Control Center. [i] Internal Battery Backup to hold Data in SOE Buffer Memory & also maintaining the Time & Date. [j] Communication with at least Four Master Stations simultaneously on IEC 60870-5-104 [k] RTU shall be capable of Acquiring Analog Values through Transducers having output as 4-20 mA, 0-10 mA, 0-+10 mA etc using Analog Input Modules. [l] FRTU shall have one TCP/IP Ethernet Port for communication with Master Station[s] using IEC 60870-5-104 Protocol. [m] FRTU shall have one Serial RS 485 Port for communication with MFTs and connected in daisy chain using MODBUS Protocol. Minimum 15 Analog Values [Including 4 Energy Values] shall be considered per energy meter. [viii] Connection with adjacent modules shall be direct through busbar via metering bushing or through MV cables. VT’s and CT’s from the manufacturer conforming to IEC61869-3 and IEC 61869-2 respectively shall be accepted.

Note: [a] The make of Vacuum Interrupter, FRTU offered shall be of the same make as of the Ring Main unit. [b] An operator situated in front, lateral and rear [A-FLR 21kA – 1 Sec, Downwards Exhaust, for Tank as well as Cable Compartment] of the RMU Switchboard during an internal fault shall not be exposed to the effects of Arcing. Internal Arc Type Test Report for IAC AFLR 21 kA for 1 Sec for both Tank & Cable Box shall be for minimum 3 Way / 3 Function RMU. [c] All operations shall be from front of the RMU, including access to cable bushings. Bushings along the sides or the rear of the RMU are not acceptable. [d] Construction of Plinth / Foundation for 11KV RMU: The rate quoted is deemed to be including the cost of Plinth / Foundation and shall be paid extra on this account. The foundation shall consists of Two Parallel Brick Walls built using Fly Ash bricks straight or curved on plan to any radius built in Cement Mortar 1:6 of length 2.10m, suitable thickness and height as per the manufacturer’s instructions over PCC Concrete Bed of 150mm 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, over 150mm thick Sand Bed, 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 earthwork excavation of pit size 2.10 X 1.20 X 0.60 Metres complete all as per manufacturer’s recommendations, drawings, as specified and as directed. [e] The rate quoted is also deemed to be including the cost of disconnection of HT Cables up to 3 Core, 240 Sq.mm from existing 2 Pole / 4 Pole Structures, removing of cable loop and reconnection to RMU complete all as specified and as directed by the Engineer-in-Charge. [f] End termination joints shall be measured and paid separately.

All as per Serial Item No. 11, but 5 Way Outdoor RMU, 2 Nos, VCB Incoming with CT Ratio 300-150/1-1A, 2 Nos, VCB Outgoing for Feeder with CT Ratio of 200-100/1-1A and 1 No VCB for Transformer outgoing with CT Ratio 100-50/1-1A complete all as specified and as directed.

All as per Serial Item No. 11, but 5 Way Outdoor RMU, 2 Nos, VCB Incoming with CT Ratio 200-100/1-1A, 3 Nos, VCB for Transformer outgoing with CT Ratio 100-50/1-1A complete all as specified and as directed.

All as per Serial Item No. 11, but 4 Way Outdoor RMU, 2 Nos, VCB Incoming with CT Ratio 200-100/1-1A, 2 Nos, VCB for Transformer outgoing with CT Ratio 200-100/1-1A complete all as specified and as directed.

Supplying, Installation of Cable Sealing System made of Super Resistant Roxylon, Halogen Free EPDM Modules, consisting of Transit Frames, for 11 KV Cables in RMU Panels, Cable size up to 3 Core, 240 Sq.mm with Bonding & Grounding [Armor Earthing] feature as per IS - 3043 using a suitable Tin Plated Copper Braid complete all as specified and as directed. Make: Roxtec / Hilti / Hawke / Agro

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. and also including disconnecting and taking down existing Earthing of any description complete all as specified and as directed.

M & L for Precast RCC Cable Route Indicator duly engraved with letters "HT/LT UG CABLE", of size 600 X 450mm, 100 mm thick with Semi Circular Shaped Top made of RCC 1:2:4, using 20 mm graded stone aggregate, duly Reinforced with High Strength Corrosion Resistant Deformed TMT Bars of Grade Fe–500D of 10 dia, duly grouted up to 550mm using PCC, 1:3:6, Type C1 complete including necessary excavation and earth work and applying Two coats of Weather Proof Exterior Emulsion Paint [100% Acrylic] over a Coat of Weather Proof Exterior Primer of same manufacturer as that of paint on all the exposed concrete surfaces complete all as specified and as directed.

M & L Boring of holes under road, pavement, hard standing by trenchless technology using ultra sound technique and necessary machinery including HDPE Pipe, 150mm bore, 0.4 Mpa working pressure complete all specified and as directed. Note: The horizontal directional drilling machine boring shall be minimum shot length of 100m horizontal length in a single span and depth shall not be less than 1.20m. The unit rate quoted is deemed to be inclusive for earth work as required at site for boring at starting and termination ends complete all as directed.

Taking down existing 6 Pole Structure complete including Cross Arms, Insulators and all other accessories and breaking concrete foundation, removing debris outside MD Land and making good the surface to match with the existing complete all as specified and as directed.

Taking down existing 4 Pole Structure complete including Cross Arms, Insulators and all other accessories and breaking concrete foundation, removing debris outside MD Land and making good the surface to match with the existing complete all as specified and as directed.

Taking down existing 2 Pole Structure complete including Cross Arms, Insulators and all other accessories and breaking concrete foundation, removing debris outside MD Land and making good the surface to match with the existing 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 including taking down old HT Cables of any description complete all as specified and as directed.

Supplying and laying GI pipe, 150mm 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.

Mavee Syndicate

M/S N.K BUILDERS

MURALI KRISHNA ASSOCIATES

GAGANSRI INFRA

Electricals India

KIRON ENGINEERING CORPORATION

CIVILEC ENGINEERING WORKS

P VENKATA RAO

M/s GOPALA KRISHNA ENGINEERING INDUSTRIE.