SPECIAL REPAIR/REPLACEMENT OF BER VCB AND CONNECTED ACCESSORIES AT SUB STN-I AFMSD KANDIVALI (E) UNDER GE (NORT) SANTACRUZ MUMBAI

Design, supply, installation, testing and commissioning of Indoor Type Ring Main Unit (RMU), 11kV, 630A, 21kA for 3 seconds, 5-way, extensible, metal enclosed, SF6 gas insulated, motorized and SCADA compatible, conforming to MSEDCL specification. The enclosure shall be fabricated from CRCA/GI sheet steel, powder coated after seven tank pretreatment process, having minimum IP54 protection for outer enclosure and IP67 protection for the sealed stainless-steel SF6 gas tank. The SF6 gas tank shall be hermetically sealed for life and maintenance free with gas leakage less than 0.1% per annum and provided with gas density monitor/pressure indicator with alarm contacts. The RMU shall consist of one (01) No. 630A Motorized Load Break Switch (LBS) feeder and four (04) Nos. 630A Motorized Vacuum Circuit Breaker (VCB) feeders with extensible bus arrangement. The RMU shall be complete with copper busbars of adequate current carrying capacity, internal arc classification, mechanical and electrical interlocks, mimic diagram, earthing system, anti-condensation heater, space heater, illumination lamp, terminal blocks, gland plates, cable supports, lifting hooks, danger notice plates, engraved name plate, operation handles and all accessories required for satisfactory operation.

Each incoming feeder with Switch consists of 1.Motorised 630A load breaker switch with built-in earth switch with full making capacity-01 Nos. 2.Mechanical Position Indicator. Switch ON/OFF/EARTHED-01 Nos. 3.Live Cable Indication -01 Nos. 4.Cable Compartment Cover interlocked with earth switch-01 Nos. 5.Cable Termination Bushings Suitable for 3 No. 1C X 300mm² XLPE cable.-03 Nos. 6.Cable Termination Cover Boots(Push on type)-01 Set. 7.NO/NC contact for-01 Set Isolator ON/OFF Earth Switch ON/OFF Fault Indicator Operated 8.Command Output for-01 Set Isolator Close Isolator Open FPI reset

Each outgoing VCB feeder consists of: 1.Motorised 630A Vacuum Circuit Breaker with manual spring charging arrangement and manual close & open push buttons, ON/OFF indication and series trip coil for self powered relay & shunt trip coil for external tripping-01 Nos. 2.Self powered Numerical O/C & E/F relay with CTs-50-100/5A,2.5VA CL-1.0,2.5VA CL 5P10- 01 Set 3.Manually operated 630A disconnector with built-in earth switch-01 Nos. 4.Mechanical Position indicator. Switch ON/OFF/EARTHED- 01 Nos. 5.Live Cable Indication -01 Nos. 6.Cable Compartment Cover interlocked with earth switch-01 Nos. 7.Cable Termination Bushings Suitable for 3 No. 1C X 300mm² XLPE cable.-03 Nos. 8.Cable Termination Cover Boots(Push on type)-01 Set. 9.NO/NC contact for-01 Set Breaker ON/OFF Relay Operated

The RMU shall be provided with one metering module consisting of three single phase Potential Transformers of ratio 11kV/√3 : 110V/√3, 50VA, Class-1.0 accuracy along with one multifunction digital energy meter capable of measuring voltage, current, frequency, active power, reactive power, apparent power, power factor, kWh, kVAh, kvarh, maximum demand and communication through RS-485 Modbus protocol. The RMU shall further include one Fault Passage Indicator with associated CTs, one Battery Charger of 7AH with maintenance free 24V (12V + 12V 2 Nos.) DC Battery Bank, 500VA Auxiliary Transformer, SF6 gas pressure indicator with alarm contacts,1 No. Handles for RMU, anti-condensation heater, internal control wiring, ferruled terminals, cable glands, cable supports, earthing terminals, hardware, foundation frame and all accessories required for complete installation. The equipment shall be factory assembled, factory tested and type tested for dielectric withstand, temperature rise, short circuit withstand, internal arc, mechanical endurance, protection degree and routine tests as per relevant IEC standards. The scope shall include transportation, unloading, installation, alignment, cable termination, testing, commissioning, SCADA integration, demonstration of satisfactory performance and handing over complete in all respects.

Make :C-sec/ ABB / Siemens / Schneider Electric or approved equivalent. NOTE:-The quoted rates shall be deemed to include the following items complete in all respects and no extra payment shall be admissible on this account:- (a) Transportation of complete RMU from manufacturer's works to site, unloading, shifting, handling and safe storage at site. (b) Design, fabrication, supply, installation, testing and commissioning of complete Indoor 11kV Motorized SF6 Ring Main Unit including all standard accessories and fittings. (c) Supply and installation of 11kV Heat Shrink Indoor Cable Termination Kits suitable for the specified XLPE HT cables including all consumables. (d) Civil foundation including excavation, PCC, RCC foundation, reinforcement, anchor bolts, grouting, cable trench modifications and restoration as per manufacturer's approved drawings & Any minor civil works, cutting, drilling, sealing, painting and restoration required during installation shall be deemed included in the quoted rates. (e) Installation, alignment, erection, interconnection, cable termination, earthing, testing and commissioning of the complete RMU. (f) Supply and installation of 500VA Auxiliary Potential Transformer complete with all accessories. (g) Supply of Right Angle Cable Boots, cable glands, gland plates, cable supports, ferrules, lugs, insulating sleeves, clamps, nuts, bolts, washers and all fixing materials. (h) Battery charger, maintenance free 24V DC battery bank, auxiliary wiring, terminal blocks, control wiring and interconnections. i) Fault Passage Indicator (FPI) complete with associated current transformers. (j) Metering Module complete with Bus PTs and Multifunction Energy Meter.

(k) Numerical Over Current and Earth Fault Protection Relays complete with current transformers, programming, relay settings and testing. (l) Complete SCADA compatible terminals, auxiliary contacts, communication wiring, RS-485/Modbus communication port and interface required for future SCADA integration. (m) Factory routine tests, type test certificates, inspection, packing, forwarding, transit insurance and delivery at site. (n) Site testing including insulation resistance test, contact resistance test, primary injection test, secondary injection test, functional checks, relay testing, interlock testing, HV withstand test wherever applicable and commissioning. (o) Submission of manufacturer's test certificates, warranty certificates, operation & maintenance manuals, GA drawings, wiring diagrams, foundation drawings and all statutory documents. (p) Labour, T&P, lifting equipment, scaffolding, consumables and all incidental works necessary for successful completion of the work. (q) Demonstration, trial run, training to department personnel and handing over the installation in satisfactory working c

Supply, Laying, Connecting and Commissioning 120 Sqmm 3 core HT Under Ground cable 11000 volts (Earthed) gradde XLPE insulated, screened, PVC bedded,galvanised steel strip or wire armoured, electric power cables (heavyduty) with aluminium conductor. Including taking down old UNSV HT Cable complete all as specified and directed by engr-in-charge.

Material and labour for cement concrete type B-1 (1:2:4) using 20 mm graded stone aggregate for PCC complete all as specified and directed by engr-in-charge.

Material and labour for earthing complete with Galvanised Steel earth plate electrode 60cm x 60 cm x 6 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below normal ground level) with top edge of earth the plate not less than 1.5 metres below normal ground level, connected to plate with GI earth strip 32 x 6 mm, 7.5 m long from earth point to test point and other end connected to control board /panel /equipment, laid under floors/plinths or fixed on walls or concealed in wall etc by means of bolts, nuts, check nuts and washers made out of galvanised iron or steel with provision of charcoal and common salt packed upto minimum 150mm all around the earth plate and protected by 40mm bore light grade galvanised iron pipe complete all as shown in electrical plate no.3 MES Schedule Part I, 2009 with PCC 1:2:4 type B1 using 20 mm graded stone aggregate, MS angle iron frame of size 50mm x 50mm x 5mm, cast iron cover with locking arrangements, GI 15 mm bore medium grade pipe and CI funnel with wire mesh for watering arrangement including necessary excavation and earth work in any type of soil/strata & testing Complete all as specified and as directed by Engineer-in-charge.