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| 1 | Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor Type, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 160 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class \"A\" insulation, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180 [Part-I], Level-3 with latest amendment complete all as specified and as directed and comprising of the following Specification and Fittings including taking down and dismantling old unserviceable transformer and depositing the same in MES store yard complete all as specified and directed:-Continuous Rating : 160 KVANo-Load Voltage Ratio: 11 KV / 433 V Tapping on HV[%] : ± 7.5, ± 5, ± 2.5Phase & Frequency : 3 Phase & 50 HzConnection: Delta StarVector Group: DYN 11Cooling : ONANType : Outdoor with HV LV cable Box |
| 2 | Fittings:[a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device.[b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug[c] Undercarriage with four plain rollers[d] Oil filling hole cum air release plug[e] Drain Valve cum Sampling Valve[f] Top Filter Valve with Plug[g] Rating Plate with Diagram Plate[h] Lifting lugs for Transformer[j] Lifting lugs for Core[k] Earthing Terminals[l] Thermometer Pockets[m] Silica Gel Breather[n] Explosion Vent[o] 50mm size Oil Temperature indicator, dial type with alarm and trip contacts[p] 150mm size Winding Temperature indicator, dial type with alarm and trip contacts[q] Marshalling Box with Double Window |
| 3 | Terminal Arrangement:[i] HV & LV side: Cable Box [ii] Quad furcating cable box with five compression glands for PVC Cable and One additional neutral terminal shall be brought out separately for earthing purpose on LV Side.[iii] First filling of new and unused Transformer Oil [IS – 335 Marked], filtered and tested up to 60KV dielectric strength at 2.5mm air gap between testing electrodes. Certification of dielectric strength shall be submitted by the Contractor after filling the oil.[iv] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.[v] All necessary arrangements with devices for measuring the temperature of core winding and oil shall be done by contractor deemed to be included in the quoted rate[vi] Platform for placement ofTransformer shall be as per the manufacturer\"s instructions complete all as specified and as directed. The cost of platform is deemed to be included in the quoted rate. [vii] The drawings of the transformer should be approved by the accepting officer before placing order.[viii] The factory acceptance test to be done by the rep of Accepting officer prior to shipment of Transformer. |
| 4 | Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor Type, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 63 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class \"A\" insulation, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180 [Part-I], Level-3 with latest amendment complete all as specified and as directed and comprising of the following Specification and Fittings B20Continuous Rating : 63 KVANo-Load Voltage Ratio: 11 KV / 433 V Tapping on HV[%] : ± 7.5, ± 5, ± 2.5Phase & Frequency : 3 Phase & 50 HzConnection: Delta StarVector Group: DYN 11Cooling : ONANType : Outdoor with HV LV cable Box |
| 5 | Fittings:[a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device.[b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug[c] Undercarriage with four plain rollers[d] Oil filling hole cum air release plug[e] Drain Valve cum Sampling Valve[f] Top Filter Valve with Plug[g] Rating Plate with Diagram Plate[h] Lifting lugs for Transformer[j] Lifting lugs for Core[k] Earthing Terminals[l] Thermometer Pockets[m] Silica Gel Breather[n] Explosion Vent[o] 50mm size Oil Temperature indicator, dial type with alarm and trip contacts[p] 150mm size Winding Temperature indicator, dial type with alarm and trip contacts[q] Marshalling Box with Double Window |
| 6 | Terminal Arrangement:[i] HV & LV side: Cable Box [ii] Quad furcating cable box with five compression glands for PVC Cable and One additional neutral terminal shall be brought out separately for earthing purpose on LV Side.[iii] First filling of new and unused Transformer Oil [IS – 335 Marked], filtered and tested up to 60KV dielectric strength at 2.5mm air gap between testing electrodes. Certification of dielectric strength shall be submitted by the Contractor after filling the oil.[iv] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.[v] All necessary arrangements with devices for measuring the temperature of core winding and oil shall be done by contractor deemed to be included in the quoted rate[vi] Platform for placement ofTransformer shall be as per the manufacturer\"s instructions complete all as specified and as directed. The cost of platform is deemed to be included in the quoted rate. [vii] The drawings of the transformer should be approved by the accepting officer before placing order.[viii] The factory acceptance test to be done by the rep of Accepting officer prior to shipment of Transformer. |
| 7 | [viii] Platform: Platform for the transformer shall be provided as per IE rules of size not less than 2.0mx2.0mx1.8m made of brick masonry using fly ash bricks built in CM 1:6 over 100mm thick concrete bed in PCC 1:4:8, type D-2 using 40mm graded stone aggregate over 150mm thick hard core of gauge not exc 63mm of broken stone or boulders, deposited, spread and levelled in layers including providing 100mm thick PCC 1:2:4 coping in type B-1 over top of platform and rendering 15mm thick in CM 1:4 finishing the surfaces even and smooth without using extra cement and applying three coats of white wash including necessary excavation, earth work as required complete all as per manufacturers instructions and as directed by the Engineer-in-Charge. |
| 8 | Supply, Installation, Testing and Commissioning of HT, 11 KV VCB line of Seven panels, standalone switch boards consiting of 630 A VCB 11 KV - 01 No as Incomer and 630 A VCB 11 KV 06 Nos as outgoing. VCB Panel indoor type, totally enclosed, free standing, floor mounting type, compartment based with truck mounted Vacuum Circuit Breaker, Spring Operated Electrically and Manually Charged Operating Mechanism suitable for horizontalisolation, horizontal draw out type VCBs with copper bus bars, Self supported Insulated Busbar with full voltage rated should be used. The switchgear panel shall be of sheet steel construction not less than 2.5mm thickness for load bearing section and not less than 2mm thickness for non-load bearing and shall totally dust and vermin proof. Complete VCB panel conforming to IEC 62271-200 standards and IP 4X Class of protection comprising necessary bus-bar extensions and connections and following protective and control devices as specified below. Circuit Breaker shall be suitable for E2, M2, C2 duty. The manufacturer of circuit breaker & panel shall also be the manufacturer of the Vacuum Interrupter. The switchgear and control gear panels shall be of the fully arc proof for 25 kA for 1 Sec AFLR with and including the following features including taking down and dismantling old unserviceable VCB and depositing the same in MES store yard complete all as specified and directed:- |
| 9 | [A] INCOMER-01 No ( Each consisting of ): 11kVIndoorSwitchgear Panel consisting of Breaker-630A, 25kA draw out type having following accessories :-(a) 230V AC Spring Charge Motor.(b) 110V DC Closing Coil.(c)110V DC Shunt Trip Coil.(d) Current Transformer Indoor Single Phase Resin Cast Ratio: 200-100/5+5 A Core-1: 15VAClass 0.5, Core -2 15VA, 5P10, Class PS - 3nos.(e) Potential Transformer Draw out TypeResin cast Ratio : 11KV/√3/110V/√3100VA, Core-1, CLASS: 0.5, 15VA, Core-2 5P10, 15VA.(f)12 Window Annunciator(g)Digital Ammeter with ASS.(h)Digital Voltmeter with VSS.(i)Multifunction Load Manager Class 0.5 with RS485 & Ethernet communication.(j)Master Trip Relay, TCS Relay , TNC Lockable Type, Manual/Remote Selector Swith etc.,(k) Numerical Protection IEC 61850 Draw out Relay with Graphical display- 01 No with Three Phase O/C & E/F (50, 51, 50N, 51N, 50G, 51G), Three Phase Directional O/C & E/F (67/67N), Negative Phase Sequence O/C (46), Inrush Detection (68), Circuit Breaker Failure Protection (50BF), Broken Conductor (46BC), Three Phase O/V, U/V & NDR (27, 59, 59N), Thermal Overload (49), Negative Sequence Overvoltage (47), Reverse Power (32), Over Frequency (81O), Under Frequency (81U), CT Supervision (60 CTS), VT Fuse Failure (60 VTS), Relay shall have 8 DI and 8 DO. |
| 10 | [B] OUTGOING-06 Nos ( Each consisting of ): 11kVIndoorSwitchgear Panel consisting of Breaker-630A, 25kA draw out type having following accessories for Transformer outgoing :-(a) 230V AC Spring Charge Motor.(b) 110V DC Closing Coil.(c)110V DC Shunt Trip Coil.(d) Current Transformer Indoor Single Phase Resin Cast Ratio: 200-100/5+5 A Core-1: 15VAClass 0.5, Core -2 15VA, 5P10, Class PS - 3 Nos.(e) Potential Transformer Draw out TypeResin cast Ratio : 11KV/√3/110V/√3100VA, Core-1, CLASS: 0.5, 15VA, Core-2 5P10, 15VA.(f)12 Window Annunciator(g)Digital Ammeter with ASS.(h)Digital Voltmeter with VSS.(i)Multifunction Load Manager Class 0.5 with RS485 & Ethernet communication.(j)Master Trip Relay, TCS Relay , TNC Lockable Type, Manual/Remote Selector Swith etc.,(k) Numerical Protection IEC 61850 Draw out Relay with Graphical display- 01 No with Three Phase O/C & E/F (50, 51, 50N, 51N, 50G, 51G), Three Phase Directional O/C & E/F (67/67N), Negative Phase Sequence O/C (46), Inrush Detection (68), Circuit Breaker Failure Protection (50BF), Broken Conductor (46BC), Three Phase O/V, U/V & NDR (27, 59, 59N), Thermal Overload (49), Negative Sequence Overvoltage (47), Reverse Power (32), Over Frequency (81O), Under Frequency (81U), CT Supervision (60 CTS), VT Fuse Failure (60 VTS), Relay shall have 8 DI and 8 DO. |
| 11 | Note: The above said panels Earthing truck - 02 Nos. Seperate earthing truck for bus earthing & cable earthing. Earthing truck shall be so designed that it is impossible to earth alive. It shall be provided with capacitive voltage detection with audio visual annunciation. Technical drawings of the VCB panel submitted by the contractor is required to be approved by the Accepting Officer before taking procuremnent action and the VCB panel to be inspected by the rep of Accepting Officer at factory premises as per IS before dispatch. Pre-commissioning inspection of VCB panel shall be carried out by Senior Electrical Inspector / Electrical Inspector. The VCB Panel shaould be SCADA compatible. The numerical relay should have minimum time delay < 20 ms wrt instantaneous and high over current / earth fault conditions meeting the requirements. |
| 12 | Supplying, Installing, Testing & Commissioning of 3 way RMU (1 incoming + 2 outgoing), 12KV, 630 Amps, outdoor, extensible type, SF6 Insulated, consisting of 01 Nos 630 Amps VCB, fixed, non draw out type as incoming and 02 Nos 630 Amps VCB as outgoing complete all specified and as directed comprising of the followingincluding taking down and dismantling old unserviceable RMU and depositing the same in MES store yard complete all as specified and directed:- |
| 13 | [A]RMU shall be floor mounted, 12 KV, 630 Amps, 21 kA for 3 Seconds, SF6 Insulated, Motorized, Outdoor extensible type, RMU with Air Insulated Bus Connected Metering unit, Type tested in line with latest IEC Standards, suitable for operations at a height up to 1000m above sea level and Ambient Temperature range from 5ºC to 50ºC without any de-rating, Switchgear and Busbar shall all be contained in a Stainless Steel Enclosure [Minimum 2.0mm thick SS 304 Grade] filled with SF6 at 0.3 Bar [300 hPa] Relative Pressure, RMU Tank shall provide Full Insulation and Switchgear shall be insensitive to the environment with Degree of Protection of IP67, Switchgear Operating Mechanism shall have an IP2X Protection and Cable Chamber shall have IP3X Protection, Outer Enclosure shall be IP 54 type tested, Powder Coated with Pure Polyester Based Paint, suitable for the site installation conditions, Accidental Overpressure due to an Internal Arc is limited by the opening of the safety valve, at the bottom of the metal enclosure, away from the operator, Plug in type of extensibility must be provided and coupling busbar should not be exposed to air to avoid oxidation of busbars. Extension of cubicle shall require 450mm to handle and the gap between the coupled RMU’s must be within 10mm. |
| 14 | [B]Each Vacuum Circuit Breaker [VCB] shall be comprising of the following: [i]11 KV, 630 Amps, 21 kA/ 3s, 3 Pole Motorised VCB (Non draw out type) with 3 pole manual disconnector and 3 pole manual earth switch, Motorized Spring Assisted Mechanism and Series Trip Coil – 1 No. [ii]Self Powered Relay with O/C, S/C, E/F Protection. Relay shall have a Front USB for Laptop Interface, LCD Display, 10 Event Records, 5 Fault Records, min 2 setting group and keypad for setting parameters for the relay with Zero time delay (DT) for I>>, I>>>, IO>>, IO>>> setting groups- 1 No[iii]Resin Cast ring core ProtectionCT, Plate mounted type : 100-50/1+1A, 5P20, 2.5 VA-01 Set.[iv]Live Cable Indicator with indications at the Front and Three Inlets to check the Synchronization of Phases – 1 No[v] Making capacity - 52.5 kAp[vi]Cable Termination Bushing suitable for up to 1 Run, 3 Core, 240 Sq.mm, XLPE Cable – 1 Set[vii]Cable Termination Cover Boots [Push on type] – 1 Set[viii]Circuit Breakers shall have Two Positions: Open or Disconnected and Closed. A separate and independent 3 Position Earthing Switch and disconnector shall be fitted to open and earth the cables in such way that interlocks prevent all unauthorised operations. An operating mechanism shall be used to manually close the circuit breaker and charge the mechanism in a single movement. An independent mechanism shall be fitted for the 3 Positions Earthing Switch and Disconnector Circuit breaker shall be fitted with a local system for manual tripping by an Integrated Push Button. There shall be no automatic reclosing. Circuit Breaker shall have a min of 2000 Mechanical and Electrical Operations. |
| 15 | [C] Air Insulated Bus Connected Metering Unit comprising the folloing:[i] Air Insulated Enclosure with necessary Bus Connection – 1 No[ii] PT 11KV / √3 / 110V / √3, 50 VA, Class-1.0 – 1 Set[iii] Multi Function Meter, Digital Type [Displaying A, V, PF, Hz, KVA, KW, KVAR, KWH, KVARH etc. Class 1.0 / 0.5] with RS485 Port for Communication in Modbus Protocol. - 01 Set[iv] R / Y / B Indicating Lamps – 1 Set[v] 11 KV / 230V AC, Class 1, 500VA Control Transformer – 1 No[vi] Battery and Battery Charger, 12 Ah, [I/P-230V AC, O/P - 24V DC] – 1 No |
| 16 | Notes:[a]An operator situated in front, lateral and rear [A-FLR 21 kA – 1 Sec, Downwards Exhaust, for Tank as well as Cable Compartment] of the RMU Switch board during an internal fault shall not be exposed to the effects of Arcing. Internal ARC Type Test Report for IAC AFLR 21 kA for 1 Sec for both Tank & Cable Box shall be minimum 3 way / 3 function RMU.[b]All operations shall be from front of the RMU, including access to cable bushings. Bushings along the sides or the rear of the RMU are not acceptable.[c]Construction of Plinth / Foundation for 11KV RMU shall be as per manufacturer recommendations and the rate quoted is deemed to be inclusive for the same.[d]The rate quoted is also deemed to be including the cost of disconnection of HT Cables up to 3 Core, 240 Sq.mm from existing 2 Pole / 4 Pole Structures, removing of cable loop and reconnection to RMU complete all as specified and as directed by the Engineer-in-Charge.[e]The contractor shall submit two sets of drawings with copy of type test certificates for approval of Accepting Officer.[f] The make of RMU/ VCB/ vacuum interrupter/ Relays/ FRTU offered shall be of same make. Different makes shall not be accepted. |
| 17 | S & F Cable Jointing Kit for 11 KV [Earthed] Grade cable for indoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm, complete all as specified and as directed. |
| 18 | S & F Cable Jointing Kit for 11 KV [Earthed] Grade cable for outdoor end termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm, complete all as specified and as directed. |
| 19 | S & F Cable Jointing Kit for 11 KV [Earthed] Grade cable for straight through joint heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 Sqmm, complete all as specified and as directed. |
| 20 | Supplying, laying and testing HT UG cable [earthed], XLPE insulated, screened insulated, steel strip armoured and pressure extruded PVC bedded, 11000 Volts grade [heavy duty] with aluminium conductor of size 3 Core 185 Sqmm laid in trenches, fixed to walls or passing through pipes and connecting up including taking out old cable complete all as specified and as directed. |
| 21 | Supplying, laying and testing HT UG cable [earthed], XLPE insulated, screened insulated, steel strip armoured and pressure extruded PVC bedded, 11000 Volts grade [heavy duty] with aluminium conductor of size 3 Core 120 Sqmm laid in trenches, fixed to walls or passing through pipes and connecting up including taking out old cable complete all as specified and as directed. |
| 22 | M & L for disconnecting existing electrical connections of defective / burnt out UG HT cable of any size 3 core from VCB, RMU and transformer including necessary excavation and taking out the required length of existing cable from loop, cutting the defective portion of old cable termination at end and refilling the cable trench with existing sand and bricks complete all as directed by the Engineer-in-Charge |
| 23 | Earthing complete with Galvanised Steel Earth Plate Electrode 600 X 600 X 6 mm thick burried directly in ground [earth pit not less than 2.25 m deep below ground level] with top edge of Plate not less than 1.50 m below normal ground level connected to galvanised earth strip 32x6mm [Earth Lead] and GI pipe 40 mm dia light Grade for earthing lead protection to the extent of maximum 7.5m, earth plate electrode surrounded by 150mm thick packed layers of charcoal and common salt filled in alternate layers, connected to the plate by means of GI bolts & nuts complete all as per Electrical plate No. 3 of SSR Part – I, connected to earthing test point including testing on completion including PCC [1:2:4, Type B1] Pit with RCC 1:2:4, Type B1 Cover 50 mm thick with 6 Nos, 8 mm dia TMT bars in both ways, MS frame made with 40 X 40 X 6 mm angle iron, MS funnel with 20 mm bore medium grade GI Watering pipe, wire mesh, earth work excavation, returning filling, removal of surplus soil etc. including removing old unserviceable earthing set complete all as specified and as directed. |
| 24 | S & F in repairs GI strip of size 32x6mm with saddles and fixing screws etc. for roof conductors and down conductors laid in trench/ floor including necessary clamps, nuts, bolts, and hylem sheet block complete all as directed |
