PROVN OF 315 KVA TRANSFORMER NEAR PT GROUND, EST NO 22, CHAKRATA

Supply, installation, testing and commissioning of factory made 11 KV Compact Sub Station as per IS-14786 (2000) with non extensible consisting of 1 Nos manually operated 11 KV/400 Amps VCB in SF6 insulated stainless enclosure, HT Cable/Bus bar 630A,1 No, Transformer 315 KVA, 11/0.433 KV CRT Oil cooled and LT switchgear complete in accordance with IEC: 62271-202 of & associated LT devices, Fault making capacity 52.5 KA/ Sec,Power frequency 1 min : 28 kV, Input range +5% to -5%, HV Current 16.83 Amps and LV Current 420 Amps, Star / Delta connection, 3 phase, and off load tap changeover, Losses as per IS-1180 (part-1) 2014 EEL-3 with amendment no. 4 Total Losses @50% load -890W, Total Losses @100% Load -2440W , 5 steps, Average AmbTemp 50 degree C, HV & LV Winding - Copper Wound,Winding temp - 95 deg C above ambient (ACB/MCCB/bus bar/Cable) comprising of and including the following: -

Enclosure (i) Outdoor type 2 mm thick galvanised iron (GI) enclosure with 4 mm thick GI base, powder coated. Roof shall be designed to support load upto 250kg/ sqm with suitable slanting (approx 10 degree) to prevent accumulation of water. Partition between compartments with 2 mm thick GI sheet (ii) Door with locking arrangement at suitable positions for easy operation and maintenance of all the components (iii) Suitable provision for HT and LT cable entry and S&F at site double compression cable glands for each cable entry (iv) Suitable LED illumination lamp with door operated switch for each compartment Integral lifting arrangement. Appropriate Danger notice plates at all sides and on each compartment (v) Protection grade IP 54 for HT & LT switchgear compartment and IP 34 for transformer compartment (vi) Type tested against Internal Arc at 21 kA for 01 second duration (vii) Suitable louvers designed for natural ventilation and thermal class K10

HT Section (i) 01 No VCB SF6 insulated consisting of 11 KV 630 Amps 50 Hz Vacuum Circuit Breaker Horizontal Draw Out VCB with Manual/230V AC Motor Operated Spring Charging Mechanism with 24V DC Closing /Opening Shunt trip coils, Aux. Switch, Mechanical On/Off Push Button, mechanical Operating Counter with metering 1 No CT, PT, IDMT, Cubical Auxiliary Relay, 8 Window Annunciator Model No. SI-801, Battery Power Pack with 7AH Battery & in built charger for 24V Circuit 01 VCB and cable box with direct Raiser as per IEC 62271 and other relevant IS/ IEC standards. (ii) Copper Busbar of suitable size-01 set (iii) Vacuum Circuit Breaker shall be suitably rated to withstand max 28 KV (RMS) at rated power frequency and lightning impulse withstand voltage 75 KV peak. It should have short circuit withstand capacity 21 KA for 3 seconds and internal arc withstand capacity 21 kA for 0.1 second. (iii) Self powered microprocessor electronic based numerical relay (with LCD display.and manual reset type) for protection against over current, earth fault, short circuit and transformer winding temperature increase. (iv) Current Transformers for 03 phases (03 Nos) with ratio : 200/5A,Class 1.0/10P10, Burden 15-15 VA. (v) Three position (Open, Close & Earth) independent operation Disconnector Switch (vi) Fault passage indicator (vii) Mechanical operation interlock (viii) Operation counter

(ix) Emergency Push button (x) Shunt Trip Coil suitably rated (xi) Manual Operating Handle (xii) Automatic motorised Spring Charging mechanism alongwith facility for manual spring charging handle / motor (xiii) Thermostatically controlled space heater of suitable rating connected through MCB and mounted by suitable spacers so that heater does not come in contact with panel wall or panel accessories. (xiv) Cable Boots suitable for 3C x 95 Sqmm for incoming and 3 x 1C x 95 sqmm for outgoing

(xiv) HT Metering Module comprising of (A) Potential Transformers for 03 phases with ratio: 11 KV/√3/110V/√3/110V/√3, class 0.5-3, Burden 50-50 VA earthed (B) Three phase LED multi-function meter for indication of Current, Voltage, Frequency, Power Factor, KW, KVA, KVAR, KWH, KVAH, KVARH, MD, fault data memory etc (C) Suitable Battery with battery charging unit alongwith suitable circuit for standby connection/ operation of control/ protection circuits (D) Suitable size and numbers of MCBs, Limit Switches and control wiring as per OEM (E) Suitable Alarm for trip indication (F) LED indicator lamps fot indicating "ON", "OFF", "TRIP", "EARTH", "TRIP CKT HEALTHY"

Transformer (i) 11 KV/ 433 V, 315 KVA, 3 phase, 50 Hz epoxy cast resin dry type copper wound transformer/ Oil cooled with vector group DYN11 as per IS:11171 of make: ECS/ IMPEX/ Voltamp (Vadodara) or as recommended by OEM of CSS and subsequently approved by dept (ii) Off load tap changer with +5% to -10% in steps of 2.5% (iii) Winding temperature indicator with alarm and trip arrangement (iv) Surge arrestor metal oxide type for primary side (v) Full load and No load losses as per latest relevant IS / ECBC

LT Section (i) Incoming Air Circuit Breaker Draw out 415 volt grade 630 Amps, 4 pole, 50 kA, manual fixed (MF) type microprocessor release with overload, short circuit, earth fault, over and under voltage protection, High short time withstand capacity Icu = Ics = Icw for 1 sec, 100% rated neutral pole, Test button for on-load testing complete of make: ABB/ Siemens/ Schneider/ Crompton Greaves/ L&T - 01 No (ii) Copper busbar 1000 Amp rated for main bus and suitable copper busbar for main bus to incoming side of MCCBs and internal control wiring with copper cables (iii) Three phase multi-function with LED display meter for indication of Current, Voltage, Frequency, Power Factor, KW, KVA, KVAR, KWH, KVAH, KVARH, fault data memory etc (iv) Current Transformers for 03 phases (03 Nos) with ratio : 630/5 A, 5 VA, class 1.0 (v)) Phase indicator LED lamps R, Y, B

Interconnection (i) RMU to transformer with 3 run of single core 95 sqmm copper conductor duly PVC 11KV insulation sleeve and other necessary accessories (ii) Transformer to LT Panel incomer with copper busbar 1000 amp duly PVC insulation sleeve (iii) Earth continuity conductor between integral components with 50 x 6 mm GI strip (iv) Suitable termination points for connecting external earth strips to the CSS

Miscellaneous (i) Make of complete CSS shall be ABB/ Siemens/ Schneider/ Crompton Greaves/ L&T/ ITE. The make of components shall be as mentioned against each component. The make of components not mentioned in the schedule shall be as recommende/ selected by the OEM. The tenderer need to submit complete specification, make of each component and GA Drgs for approval before confirming order to the OEM. (ii) The foundation of the CSS shall be as recommended by the manufacturer. The OEM should submit structural and architectural drg of foundation. The cost of foundation deemed to be included in the quoted rate. (iii) Earth continuity conductor between integral components with 50 x 6 mm GI strip. (iv) Suitable termination points for connecting external earth strips to the CSS shall be provided. (v) The cable terminations shall be executed by certified/ licensed cable jointers to avail the guarantee/ waranty of the CSS. The tenderer shall submit the license/ certificate from competent authority of the cable jointer. (vi) Any parts/ components not mentioned in the specification but forming integral part of the CSS as per standard specification of the OEM shall also be provided and the cost thereof deemed to be included in the quoted rate. (vii) The factory acceptance test shall be done by representative of accepting officer in presence of the contractor before dispatch of the CSS from the factory of OEM. The pre-commissioning test after installation shall also be done by Senior Electrical Inspector/ Electrical Inspector detailed by appropriate departmental authority. The instruments and other accessories required at the time of inspection shall be arranged by the contractor and the cost deemed to be included in the quoted rate.

Excavation in trenches in hard / dense soil n exc 1.5 metre wide and not exc 1.5 metre deep and getting out including forming bottom surface for laying HT cable, foundations etc complete all as specified and directed .