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| 1 | Supply, installation testing and commissioning of factory made 11 KV Compact Sub Station (CSS) with non extendable RMU consisting of 1 No manually operated 11 KV/400 Amps VCB in SF6 insulated stainless enclosure, HT Cable/Bus bar 630A,1 No, Transformer 250 KVA, 11/0.433 KV CRT dry type air cooled and LT switchgear complete in accordance with IEC: 62271-2021 & associated LT devices, Fault making capacity 52.5 KA/ Sec,Power frequency 1 min : 28 kV, Input range +5% to -5%, HV Current 13.12 Amps and LV Current 333 Amps, Star / Delta connection, 3 phase, and off load tap changeover, 5 Steps , Losses at No Load- ECBC Losses at 100% Efficiency at full load 98.3%, Average Amb Temp 50 degree C, HV & LV Winding - Copper Wound,Winding temp – 95 degree C above ambient comprising of and including the following :- (Applicable standards and testing for the above specifications and Hence, will be as per IS-11171;2021, IS-2026 (part I-11), IEC-6007-11, ECBC losses- Latest). |
| 2 | 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 |
| 3 | HT Section(i) 01 No VCB SF6 insulated consisting of 11 KV 630 Amps 50 Hz Vacuum Circuit Breaker (motorised) - 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 |
| 4 | (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 |
| 5 | (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\\" |
| 6 | Transformer (i) 11 KV/ 433 V, 250 KVA, 3 phase, 50 Hz epoxy cast resin CRT dry type copper wound transformer with vector group DYN11 as per IS:11171 : 2026 (Pt-I) - 2021 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) Losses as per latest relevant IS / ECBC. |
| 7 | LT Section (i) Incoming Air Circuit Breaker 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 (ii) Copper busbar 500 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 |
| 8 | 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 |
| 9 | Miscellaneous (i) 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. Please Enable Macros to View BoQ information |
| 10 | Miscellaneous (i) 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. Please Enable Macros to View BoQ information |
