PROVN OF TWO WAY BOTH SIDE EXTENSIBLE TYPE 11 KV HT RING MAIN AT AF STATION MEMAURA

Amount

Supplying , installation, testing and commissioning of 11 kV, 630 Amps having short circuit capacity 21kA/3-sec, Outdoor (IP54), RMU (Ring main unit) 2-way both side extensible type comprising of 02 Nos manually operated 630 Amp Fixed-Type manual spring-charging VCB for coupling with exsiting ABB make RMU having electrolytic grade copper busbars all inside, gas-filled, robotically welded stainless steel 304 (Non Ferrite Non Megnetic Grade) tank with min. thickness 3+0.5 mm, IP 67 Degree of Protection , internal-arc classified 21kA/1sec, on-site-repairable with site replacable bushing, gas refilling etc. The enclosure shall have padlockable double-door access with anti-theft hinges, fully covering the front facia and cable boxes to ensure fail-safe anti-theft protection. The unit shall include the following along with all necessary accessories and fittings as required at site. Make: ABB/CG/Siemens

(A) 02 Nos. Outgoing VCB module each consisting of following accessories :- (i) Each function-unit consists of a vacuum-circuit breaker in combination with a three position-switch.The three-position-switch fulfills the operation of the disconnector-function and earthing function. (ii) 11kV, 630A Fixed-Type VCB module with series disconnector cum earthing switch of short circuit breaking current/withstand - 21kA/3-sec, Making Capacity - 50kAp-01 No (iii) Aux. contacts - 1NO+1NC-01 No (iv) Stored-energy motorized high-endurance spring charging mechanism (M1+), with inbuilt spring-charging lever and mechanically latched ON/OFF push-buttons to allow handle-less and un-inhibited operation -01 No (v) Cable terminals (site replacable Cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/testing/replacement purposes) with double-door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access upto 11 KV , 120 Sqmm , 3 Core, XLPE AL cable termination in live-condition. Each Set of 3 (vi) Right angle boots (push on type)-Each set of 3

(vii) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault. Relay should have facility to display the maximum loaded phase current also. Relay shall be communicable with RS 485 Port on MOD BUS Protocol-01 No (viii) Associated ring-core cast-resin insulated CTs 50/1 Amp , 2.5 VA, 5P10 for protection - Each Set of 3 CTs 100-50/1 Amp , 2.5 VA,class 1.0 for metering (ix) Arc proof cable covers with self Interlocking mechanism with earth switch -01 No (x) Capacitive voltage indication fixed type system as per IEC61243 with LED -01 No (xi) Push button for breaker trip (xii) Shunt trip coil 24V DC - 01(xiii) ON, OFF, TRIP mechanical indication on the front mimic of the panel - 01. (xiv) Emergency Trip Push Button - 01. (xv) To ensure reliablility of operation Vacuum interrupter shall be of same make as Ring Main Unit. (xvi) 8 window annunciator with transformer protection scheme. (xvii) Digital multifunction meter 1 nos

(B) Additional equipment delivered separately or mounted seperately :- (i) Operationg Handle for Manual Isolator/Disconnector/Earthing Operation-02 Nos (ii) Standard Manometer -01 No (iii) Operation and Maintenance Manual -01 No (iv) Installation & Commissioning Manual -01 No (v) Cable clamping provision (standard) -01No (vi) suitable coupling kit for integrating existing RMU at site with new RMU.Mounting of trafo scheme and meter shall be done in additional panel. (vii) Battery of 12AH capacity along with battery charger.

Notes:- (i) Necessay interclocking arrangement shall be provided for safety and operations. (ii) The 2 Way RMU should be compatible to connect with Existing ABB make 04 Way RMU. (iii) Above mentioned RMU shall be coupled/connected with existing ABB make 04 Way RMU and if any items which are required during interconnection shall deemed to be included in quoted rate. (iv) Above switchgear shall confirm to relevant IEC (62271-200) for design, manufacturing and internal arc compliance. Any claims towards internal arc compliance, number of mechanical/electrical/short-circuit operations, gas-leakage rates etc. shall not be accepted unless proven via type-test reports of model being offered. (v) Cost of construction of foundation including construction material, necessary earth work and excavation as per manufacturer design for RMU complete all as required at site and as directed are deemed to be included in the quoted rate.

M&L in replacement earthing complete with galvanised steel earth plate electrode 600x600x6.00 mm thick, burried directly in ground vertically to a depth not less than 2.25 mtr deep below GL with top edge of the plate not less than 1.5 mtr below normal GL and connected to earth plate . Earth plate surrounded by 15 cm thick packed layers of charcoal/coke and common salt upto 0.90 meter depth all around the earth plate and connected to earth lead of GI strip 25x4 mm by means of bolts, nuts, check nuts and washers of GI or steel and thimbles and other end of the earth wire connected to equipments/panels and protected by galvanized iron or steel pipe light grade 40 mm bore and water pipe 20 mm bore GI medium grade with funnel and wire mesh, including all necessary excavation and earth work PCC chamber in cement concrete 1:3:6 type C-2 and RCC cover and all as shown in electrical plate No 3 of MES schedule Pt I of 2009 and also including making test point for testing of earthing complete all as specified and as directed. Note : 1. RCC pit cover shall be pre-cast of RCC (1:2:4) type B-I , 50mm thick reinforced with XPM weighting not less than 4 KG/sqmm in lieu of CI cover. 2. Charcoal/coke and common salt upto 0.90 meter depth shall be filled in layers of 15 centimeters all around the earth plate. 3. On testing after completion of earthing if desired earth resistance is not achieved , the earthing will be redone at no extra cost to obtain the desired earth values.

M/S WALIA TRADESRS (BID ID -3129656)