PROVISION OF 4 WAY RMU WITH ALLIED WORKS AT NAVAL PARK AND AS and AS OF 315 KVA TRANSFORMER TO UPGRADE WITH 500KVA TRANSFORMER AT INS VIRBAHU UNDER AGE EM-I OF GE U-I, VISAKHAPATNAM

Amount

Supplying, laying and testing XLPE insulated and PVC sheathed, FRLS, armoured heavy duty underground cable, ISI marked with aluminium stranded conductor 11000 Volt (E) grade of size 3 Core, 120 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.

Excavation in trenches not exceeding 1.5m wide and not exceeding 10 Sq.m on plan area and not exceeding 1.5m deep in Soft / Loose soil 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.

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

M & L for Sand cushion with crushed stone dust cushioning over and around the cable for cable protection in trenches, leveled 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.

M&L for cutting the tarmac / hard standings in road and excavating trenches across the road in size not exceeding 0.45 m wide and 1.0 m depth for laying cable including refilling earth & making good top surface of the disturbed portion with 100mm thick PCC 1:3:6 or bituminous mix as per existing & matching with the surroundings complete all as specified and directed. Note- The cost of HDPE pipe will be measured and paid separately

Supplying and laying 100mm Outer dia, High Density Polyethylene [HDPE] Pipes of pressure rating PN 10 laid in under road crossing for cable protection. complete all as specified

M&L for cable route indicator for HT UG cable, 11000 Volt grade made out of 4mm thick MS sheet in round shape of dia not less than 200mm, embossed with HT Cable on it, bolted with 2 nut of suitable size at top of 40 x 6 mm MS flat iron of length not less than 1 meter, complete metal surfaces painted with 2 coats of synthetic enamel paint over a coat of primer & bottom of flat iron embedded in PCC 1:3:6 type C2 of size 200mm x 200mm x 500mm (400mm below ground level an 100mm above ground level), exposed surface of concrete painted with 3 coats of white wash including necessary earth work complete all as specified and directed.

Supply, install, testing & commissioning of 4 way RMU ( 1 incoming + 3 outgoing), 11 KV, 630 A, outdoor, extensible type, SF6 insulated, consisting of 01 Nos, 630A VCB, fixed, non draw out type as incoming and 03 No, 630A VCB as outgoing, conforming to following specifications:- (A) RMU shall be floor mounted, 11 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Motorized, Outdoor extensible type, RMU 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 Ambient Temperature range from 5ºC to 50ºC without any de-rating. Switchgear and Busbar shall be contained in a Stainless Steel Enclosure [made out of min 2 mm thick SS 304 Grade sheet] 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, 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 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.complete all as specified and as directed. Make of RMU : ABB / Siemens / Schneider, Make of Relay - Siemens /ABB/ Schneider

(B) Each Vacuum Circuit Breaker [VCB] shall comprising of the following:- [i] 11 KV, 630 Amps, 21 kA / 3s, 3 Pole Motorized VCB (Non draw out type) with 3 pole manual disconnector and 3 pole manual earth switch, Motorized Spring Assisted Mechanism and Series Trip Coil – 1 No. [ii] Relay with Auxilliary supply with Self Powered option with O/C, S/C, E/F Protection. Relay shall have a Front USB for Laptop Interface, LCD Display, 10 Event Records, 5 Fault Records, min 2 setting group and keypad for setting parameters – 1 No [iii] Resin Cast ring core Protection CT, Plate mounted type : 100-50/1+1A, 5P10, 2.5 VA-01 Set. [iv] Live Cable Indicator with indications at the Front and Three Inlets to check the Synchronization of Phases – 1 No [v] Making capacity - 52.5 kAp [vi] Cable Termination Bushing suitable for up to 1 Run, 3 Core, 240 Sq.mm, XLPE Cable [vii] Cable Termination Cover Boots [Push on type] [viii] 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 unauthorized 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.

(C) Air Insulated Bus Connected Metering Unit comprising the following:- [i] Air Insulated Enclosure with necessary Bus Connection – 1 No [ii] PT 11KV / √3 / 110V / √3, 50 VA, Class-1.0 – 1 Set [iii] Multi Function Meter, Digital Type [Displaying A, V, PF, Hz, KVA, KW, KVAR, KWH, KVARH etc. Class 1.0 / 0.5] with RS485 Port for Communication in Modbus Protocol. - 01 Set [iv] R / Y / B Indicating Lamps – 1 Set [v] 11 KV / 230V AC, Class 1, 500VA Control Transformer – 1 No [vi] Battery and Battery Charger, 12 Ah, [I/P-230V AC, O/P - 24V DC] – 1 No Notes:- [a] An operator situated in front, lateral and rear [A-FLR 21 kA – 1 Sec, Downwards Exhaust, for Tank as well as Cable Compartment] of the RMU Switch board 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 submitted during drawing approval by the accepting officer.

[b] 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. [c] Construction of Plinth / Foundation for 11KV RMU: as per manufacturer’s recommendations. The rate of the same is deemed to be included in the unit price [d] The make of RMU / VCB / vacuum interrupter / Relays offered shall be of same make. Different makes shall not be accepted. [e][ Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of RMU shall be carried out by Senior Electrical Inspector / Electrical Inspector. [f] The factory acceptance test to be done by the rep of accepting officer prior to despatch. [g] The make of RMU/VCB/Vaccum interrupter/Relays offered shall be of same make.

M & L for Straight Through Joint, outdoor Heat Shrinkable type, suitable for 11 KV Grade, 3 Core, 120 Sq.mm, HT, XLPE Insulated, Armoured Power Cable Aluminium Conductor and testing after jointing 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 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. including taking down of existing earthing set complete all as specified.

M & L for Cable End Termination, Heat Shrinkable, outdoor type suitable for 11 KV Grade, 3 Core, 120 Sq.mm, HT, XLPE Insulated, Armoured Power Cable Aluminium Conductor and testing after jointing complete all as specified and as directed.

M & l for dismantling existing Transformer including demolition of its base and connected accessories and shifting the transformer to store complete all as specified and directed.

Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor Type, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 500 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class "A" insulation, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180 [Part-I], Level-3 with latest amendment complete all as specified and as directed and comprising of the following Specification and Fittings: Continuous Rating : 500 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 with HV LV cable Box

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

Terminal Arrangement: [i] HV & LV Side: Cable Box [ii] 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. [iii] 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. [iv] 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. [v] All necessary arrangements with devices for measuring the temperature of core winding and oil shall be done by contractor deemed to be included in the quoted rate [vi] Platform for placement of Transformer is as per the manufacturer complete all as specified and as directed. The cost of platform is deemed to be included in the quoted rate. [vii] The drawings of the transformer should be approved by the accepting officer before placing order. [viii] The factory acceptance test to be done by the rep of accepting officer prior to despatch.

Supplying, laying and testing XLPE insulated and PVC sheathed, FRLS, armoured heavy duty underground cable, ISI marked with aluminium stranded conductor 11000 Volt (E) grade of size 3 Core, 95 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.

M & L for Cable End Termination, Heat Shrinkable, Indoor type suitable for 11 KV Grade, 3 Core, 95 Sq.mm, HT, XLPE Insulated, Armoured Power Cable Aluminium Conductor and testing after jointing complete all as specified and as directed.

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