PROVISION OF ELECTRICAL AUGMENTATION OF CEMC 0603 BUILDING AT RCI, HYDERABAD

Supply, installation, testing & commissioning of transformer step down outdoor type of capacity 2500 KVA complete with all standard accessories / fittings suitable for HT 11 KV 3 Phase and LT 433 volts 3 Phase 4 wire, copper wound with OLTC and variation of secondary voltage +10% to -10% in steps of 2.5% continous rating with temperature rise of 50/55 degree ceisious conforming confirming to IS 1180 (Level-2) and conventional / herimetical sealed with and including following accessories with SCADA compatability complete all as specified and directed.

(a) RTCC panels as per required specification shall be designed by OEMs. (b) Necessary extension / adaptor boxes at LV side shall be suitable for bus duct and HV side shall be suitable for HT UG cable shall be designed as per specifications. (c) Oil conservator with filter type drain valve and oil level. (d) Dehydrating breather with first fill of dehydrating agent. (e) Pressure release valve. (f) Thermometer with pocket on tank cover (g) Rating plate and terminal marking plate. (h) Oil filling hole with cap / plug with connection plate complete. (j) Air release valve. (k) Drain outlet pipe with brass gate valve and dummy plug.

(l) Initial filling of transformer oil upto recommended level confirming to IS 335. (m) ONAN type cooling, vector group: Dyn 11. (n) Double float Buchholtz relay with alarm and trip contacts including control cable of copper conductor as per OEM standard from Marshalling box to Relay of VCB / Hooter for relevant fault alarming. Buchholtz relay shall be provided with 2 shut off brass valves at ends. (o) 150mm dia winding temperature indicator, dial type with alarm and trip contacts with SCADA compatability.

Note for Sl item No 2 above: (a) 11 KV, 3 Phase, 50 HZ, 800 Amps, 26.3 KA, VCB having short circuit current withstand capacity not less than 26.3 KA for 3 seconds having manual and automatic charging mechanism, by DC / Universal motor suitable for 110 Volts / 230 Volts AC/DC or as per OEM's recommendation, shunt trip coil, indication lamp, on off switch padlock, provision for earth switch etc complete all as specified and directed.

(b) Double Core and Double Ratio type dry type current transformers (C.Ts) of suitable ratio as approved for 11 KV, 3 Phase, 50 HZ, having 15 VA burden or as per OEM's recommendation with 0.5 class accuracy for metering and % P10 accuracy for protection - 01 Set of three. (c) Dry type 11 KV/110 Volts potential transformer (P.T.s) suitable for 11 KV, 3 Phase, 50 HZ, connected to bus bar class-1 accuracy of 100 VA burden or as per OEM's recommendation complete all as specified and directed - 01 Set.

(d) Electronic type solid state programmable type self powered, SCADA compatible having overload, earth fault and short circuit tripping facility with memory to record fault event with fault current and type of fault with real date and time suitable for 11 KV, 3 Phase, 50 HZ VCB and having high torque, less burden not more than 3 VA and low overshoot suitable for 5 of 1 Amp current rating and having three over current and one earth fault elements with over current range not less than 50% to 200% in steps of not less than 5% with time multiplier setting range not less than 0.1 to 1.0 in steps of not more than 0.01 (separate for over current and earth fault) suitable DC auxiliary supply and housed on horizontal draw out type case flush pattern with accessories duly connected with trip and alarm system complete all as specified and directed - 01 Set.

Note: (i) The high voltage test and other relevant test shall be carried out at site after laying and before commissioning. (ii) Excavation, earthwork, sand cushioning, PCC cable cover protection pipe and joints only will measured and paid separately under respective item of Schedule.

1500 hrs salt spray test as per IEC, horizontal or vertically array direction with span lengths jointed at regular intervals through removable block joints having all joint contact surfaces silver plated, together with all kinds of bends, tees etc; with halogen free sandwich insulation system of Class F with provison for termination inside power control centers of capacity for various types of loads, the busbar trunking system routed on rigid ladder type trays of appropriate span and adequate strength with support structures anchored to ground and also provided with GI canopy not less than 2mm thick complete all as per NEC : SP-30 : 2011, IS-8623, IEC-61439, 1-6, IEC-60364-5-54, IEC-529 & latest relevant standards, all as specified and directed. (From 2.5 MVA T/F- 1 to Main LT Panel No - 1 & From 2.5 MVA T/F-2 to Main LT Panel No - 2)

at regular intervals through removable block joints having all joint contact surfaces silver plated, together with all kinds of bends, tees etc; with halogen free sandwich insulation system of Class F with provison for termination inside power control centers of capacity for various types of loads, the busbar trunking system routed on rigid ladder type trays of appropriate span and adequate strength with support structures anchored to ground and also provided with GI canopy not less than 2mm thick complete all as per NEC : SP-30 : 2011, IS-8623, IEC-61439, 1-6, IEC-60364-5-54, IEC-529 & latest relevant standards, all as specified and directed. (From Main LT Panels to Sub LT Panels)

Note: (i) Rate quoted shall deemed to include cost of excavation in any type of strata, RFR and upto 50 m PCC pit, funnel and RCC cover plate. (ii) GI earth strip above 7.5 m will be measured and paid seperately.

Cutting of existing bituminious / PCC road or flooring / plinth protection for laying of GI pipe in road intersection for passing of HT XLPE cable including excavation in any type of soil, returning and filling in and making good top 30cm of the trench by providing PCC 1:2:4 type B1 using 20mm graded stone aggregate to flush with existing road surface complete all as specified and directed.

switch, copper control wiring of required size for instruments and duly powder coated on the outside and inside including air ventilation for heat dissipation, suitable size knock out holes for cable glands and lugs for incoming and outgoing cable etc., independent multi layer chambers to accommodate complete with necessary foundation all as specified and directed by Engineer-in-Charge including the following accessories: - a) Aluminium Bus bar TPN, full for phase and neutral with colour code sleeves with panel mounted energy meter - 01 Job. b) LED RYB, ON, OFF & TRIP indication lamps - 01 set. c) LED Ammeter and voltmeter with necessary CTs and display of required rating.

Note: (i) Rate quoted shall deemed to include cost of excavation in any type of strata, RFR and upto 50 m PCC pit, funnel and RCC cover plate. (ii) GI earth strip above 7.5 m will be measured and paid seperately.