GE ELEC/D-58/2024-25

Amount

Supply,installation,testing & commissioning of transformer Step down, outdoor type copper wound 11/0.433 KV, 3 phase, 50 HZ of rating 500 KVA, core type, oil immersed naturally air cooled, oil natural air natural (ONAN), with external colling tubes, delta connected on primary side (HV) and star connected on secondary side (LV) in accordance with vector group DYn-11 with neutral brought out on secondry side (LV) and having taping range + 7.5% in steps of 2.5% each on HV side to be changed by means of hand operated off load tap changer gear switch. The maximum temperature rise should not exceed 40 degree celsius in oil and 45 degree celsius in HV/LV winding when measured by resistance method after continous full load run on an ambient temp of 40 degree celsius transformer shall be of BOLTLESS core design. Transformer shall be double wound, core type with low loss, non ageing, high permeability prime grade CRGO with m4 grade or better, perfectly insulated and clamped to minimize noise and vibrations. The transformer shall be IS/IEC 60076 and as per IS-1180 part-I of 2014 marked and shall comprise of the following:- (a) One cable box on HT side (Primary side) consisting of three nos porcelain bushing with copper rods, complete with nuts and washer, with cable glands suitable for reception/taking out 3 core 120 Sqmm, HT 11000 volts grade, XLPE insulated and PVC sheathed, heavy duty, armoured cables including jointing materials complete. (b) One cable box on LT side(secondary side) consisting of four nos porcelain bushing with copper rods, complete with nuts and washers, with cable glands suitable for reception/taking out 3.5 core 630 sqmm, LT 1100 volts grade, PVC/XLPE insulated and PVC sheathed, heavy duty, armoured cables including jointing materials complete. (c ) conservator with filter type drain valve and oil level guage. (d) De-hydrating breather with first fill of dehydrating agent (Silica Gel). (e) Explosive vent, Thermometer pocket on tank cover, oil level guage, Oil drain filter valve, Lifting legs,oil filling hole with cap/plug with connection plate complete, Air release valve plug and four nos plain solid cast steel detachable rollers. (f) One 100 mm dia, dial type thermometer, vapour pressure type, having range 0-120 degree celsius with metal guard having maximum perimeter temperature reading indicator with re-setting device.

(g) Two earthing terminals on tank cover to facilitate fixing of 32x6mm galvanised iron earth strip for earthing of body. (h) Rating plate and terminal marking plate.Returning filling in, Including spreading, levelling,. Watering and well ramming soil in layers not exceeding 25 cm thick complete all as specified and directed by Engr- in- Charge. (j) Extra bushing for neutral in the LT cable box for providing independent set of earthing for neutral. (k) First fill of new and unused transformer oil, IS-335 of 1986 marked, filtered and tested upto 50 KV dielectric strength at 2.5 mm air gap between testing electrodes, specific resistance at 27 Degree celsius Ohm-om 500 x 10 the power12, water content 50 PPM, Dielectric dissipation factor (tan Deta at 90 degree celsius) 0.005, Neutralisation value mg of KOH/gm of oil 0.03, Inter facial tension N/M at 27 Degree celsius - 0.04, flash point 140 Degree celsius and sluge 0.1 % by weight. (l) Providing adequate size and nos of channels, embeded in floor, for movement of transformer. (m) Tranformer losses shall not exceed the loses mentioned in Table 6 of IS: 1180 of 2014 Part - I with latest energy Effeciency level - II.

Supply, Laying, Testing and Commissioning of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts, (E) grade with cross sectional area 120 sqmm, 3 core, IS 7098 marked, laid in trenches fixed to pole, including jointing & testing complete all as specified and directed by Engr-in-Charge.

Supply, fixing, Testing and commissioning of Cable jointing kit for 11 KV (Earthed) grade cable for Outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 sqmm to 120 sqmm complete all as specified and directed by the Engg-in-Charge.

Supply and laying GI tubes light grade ISI marked, galvanized of 50 mm bore laid in trenches or under floor or fixed with poles/walls for protection of electric cable omplete all as specified and directed by the Engg-in-Charge.

Supplying, laying, jointing, testing and connecting in replacement XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, IS 7098 marked, suitable for LT 1100 Volt system, laid in trenches fixed to pole, including jointing & testing complete all as specified and directed by Engr- in- Charge of following sizes:-

630 Sqmm, 3.5 Core

185 Sqmm, 3.5 Core

120 sqmm, 3.5 Core

95 sqmm, 3.5 Core

35 sqmm, 3.5 Core

16 sqmm, 4 Core

M&L for earthing complete with galvanized Steel earth plate electrode 600 x 600 x 6.0 mm thick, buried directly in ground (earth pit not less than 2.25 meters below normal ground level) with top edge of the plate not less than 1.5 mtrs below normal ground level surrounded from all sides by mixture of charcoal and common salt and electrode connected to and incl galvanized iron strip 32x6 mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanized iron or steel and earth wire protected by GI protection pipe light grade 15mm dia connected to main earth wire on pole or controll board GI pipe light grade 20mm bore for watering funnel with wire mesh PCC chamber pit in PCC 1:3:6 type C-1 40mm yhick Precast RCC -25 cover reincorced with 8 mm dia TMT bars @ 10 cm C/C on both sides and handle, excavation and earth work in any type of soil and removal upto 50m complete all as sprecified and shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion, complete all as specified and directed by Engr- in- Charge.

(b) Outgoing:- (i) MCCB 4 pole , 250 Amps,50 Hz,415 Volts, 36 KA with thermal magnetic release - 02 Nos (ii) MCCB 4 pole , 160 Amps,50 Hz,415 Volts, 25 KA with thermal magnetic release - 02 Nos (ii) MCCB 4 pole , 100 Amps,50 Hz,415 Volts, 25 KA with thermal magnetic release - 02 Nos (iv) MCCB 4 pole , 32 Amps,50 Hz,415 Volts, 10 KA with thermal magnetic release - 01 Nos (c) Platform of Panel:- Platform for the panel with PCC 1:4:8 type D-2 with 40 mm graded crushed stone, 15 cm thick in foundation, brick work in CM 1:6 with sub class 'B', old size bricks, rendering 15 mm thick in CM 1:6 on exposed surfaces and 100 mm thick PCC padding 1:3:6, type C-1 using 20 mm graded crushed stone aggregate on top and grouting bolts etc for panel. The platform shall be such that it is of a height 45 cm above the nearest road level. Note :- (i) All out going feeder shall be connected by cable through suitable size gland plate / glands. (ii) The various feeders shall be indicated by 50 mm size letters in synthetic enamel white paint. (iii) All MCCB with adjustable protection for over load and short circuit and conforming to IEC60947/IS 13947/Pt.II/1993 (Latest Version). The MCCB should have Ics=100%Icu. The MCCBs shall have spreader links and barriers as standard feature of manufacturer

Supplying, installation, testing and commissioning of 11 KV, 630 Amps having short circuit capacity 20kA/3-sec, Outdoor (IP54), RMU (Ring main unit) 4-way comprising of 02 Nos motorized operated Load Break Switch and 02 Nos 630 Amp Fixed-Type motorized spring-charging VCB electrolytic grade copper busbars all inside single, gas-filled, robotically welded stainless steel 304 (Non Ferrite Non Megnetic Grade) tank with min. thickness 3+0.5 mm, IP 67 Degree of Protection , internal-arc classified 20kA/1sec, on-site-repairable with site replacable bushing/coupling/mechanism, gas refilling etc. The enclosure shall have padlockable double-door access with anti-theft higes, fully covering the front facia and cable boxes to ensure fail-safe anti-theft protection. The unit alongwith Bus-connected, fixed-type Auxiliary transformer shall include the following along with all necessary accessories and fittings as required at site. (A) 02 Nos. Incoming Load Break Switch module each consisting of following accessories :- (i) Each switching-unit is designed as a three position switch. This three function switch combines the functions of switch-disconnector and earthing switch. (ii) 11kV, 630A Load Break Switch with interlocked line-earthing scheme both short circuit current - 20kA/3-sec, Making Capacity - 50kAp -01 No (iii) Auxiliary contacts - 1NO + 1NC-01 No (iv) Spring-assisted snap-action motorized mechanism with un-inhibited operating shaft for emergency manual operation with integrated earthing switch -01 No (v) Cable terminals (site replacable Cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/testing/replacement purposes) with double-door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access upto 11 KV , 300 Sqmm , 3 Core , XLPE AL cable termination in live-condition. Each Set of 03

(vi) Right angle boots (push on type)-Each Set of 03 (vii) Arc proof cable covers having cable entry from bottom , front with Interlocking mechanism including earth switch -01 No (viii) Capacitive voltage indication fixed type system as per IEC61243 with LED - 01 Set (ix) Fault Passage Indicator - It is to be provided for each incomer load break unit, FPI with LED/digital display to be added for detection of cable fault-01 No (x) ON, OFF, EARTH mechanical indication on the front mimic of the panel - 01 No (B) 02 Nos. Outgoing VCB module each consisting of following accessories :- (i) Each function-unit consists of a vacuum-circuit breaker in combination with a three position-switch.The three-position-switch fulfills the operation of the disconnector-function and earthing function. (ii) 11kV, 630A Fixed-Type VCB module with series disconnector cum earthing switch of short circuit breaking current/withstand - 20kA/3-sec, Making Capacity - 50kAp-01 No (iii) Aux. contacts - 1NO+1NC-01 No (iv) Stored-energy motorized high-endurance spring charging mechanism (M1+), with inbuilt spring-charging lever and mechanically latched ON/OFF push-buttons to allow handle-less and un-inhibited operation -01 No (v) Cable terminals (site replacable Cable bushings situated not beyond 300mm from cable-cover to allow ease of access for installation/testing/replacement purposes) with double-door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access upto 11 KV , 185 Sqmm , 3 Core, XLPE AL cable termination in live-condition. Each Set of 3 (vi) Right angle boots (push on type)-Each set of 3 (vii) 3O/C + 1E/F self powered numerical protection relay with Low and High set for Over current and Earth Fault. Relay should have facility to display the maximum loaded phase current also.Relay shall record minimum 5 fault records with time stamping. Relay shall be communicable with RS 485 Port on MODBUS Protocol-01 No (viii) Associated ring-core cast-resin insulated CTs 100-50/1-1 Amp , 2.5 VA, 10P10 for protection for two outgoing - Each Set of 3

(ix) Arc proof cable covers with self Interlocking mechanism with earth switch -01 No (x) Capacitive voltage indication fixed type system as per IEC61243 with LED -01 No (xi) Push button for breaker trip (xii) Shunt trip coil 24V DC - 01 (xiii) ON, OFF, TRIP mechanical indication on the front mimic of the panel - 01. (xiv) Emergency Trip Push Button - 01. (C) 01 No. Bus-connected, fixed-type Auxiliary transformer with floor-mounted compartment of matching height and depth, positioned along-side RMU to provide required aux. supply and metering consisting of following accessories :- (i) 1-Ph (11kV/rt3):230VAC, 500VA Auxiliary transformer-01 No (ii) 2x12 Volt DC battery-01 Set (iii) Battery charger-01 No (iv) HRC fuse-links for primary side isolation and AC/DC MCBs for secondary isolation-01 Set (v) LED Indications to confirm AC/DC supply availability-01 Set (vi) Anti-condensation space-heater-01 No (vii) LED lamp for illumination and 3-pin socket with switch -01 No (D) Additional equipment deliverd separately or mounted seperately :- (i) Operationg Handle for Manual Isolator/Disconnector/Earthing Operation-02 Nos (ii) Standard Manometer -01 No (iii) Operation and Maintenance Manual -01 No (iv) Installation & Commissioning Manual -01 No (v) Cable clamping provision (standard) -01No Note:- (i) It is preferable to have all feeder-switches inside single stainless steel compartment with incomer feeders at the extremities to prevent chances of failure due to plug-in coupling arrangement. (ii) Necessay interclocking arrangement shall be provided for safety and operations (iii) Above switchgear shall confirm to relevant IEC (62271-200) for design, manufacturing and internal arc compliance. Any claims towards internal arc compliance, number of mechanical/electrical/short-circuit operations, gas-leakage rates etc. shall not be accepted unless proven via type-test reports of model being offered. (iv) Cost of provn of plinth for RMU as per OEM drawing is deemed to be included in the cost.

Supply and laying GI tubes light grade ISI marked, galvanized of 80 mm bore laid in trenches or under floor or fixed with poles/walls for protection of electric cable complete all as specified and directed by the Engg-in-Charge.

Boring of hole under road/pavement/hard standing or any other situation by mannual means suitable for passing of GI pipe 40 to 100 mm bore and making good both ends complete all as specified and directed by the Engg-in-Charge.

Excavation in trenches not exceeding 1.5 metre wide & not exceeding 1.5 meter in depth for foundation, laying of cable or pipe (where provided for protection of cable or fixing with poles and stays) and getting out in any type of soil including trimming the sides and forming bottom surfaces to required levels complete all as specified and directed by the Engg-in-Charge.

Removing surplus excavated soil to a distance n.exc. 50 metre and depositing where directed at a level n.exc 1.5 metre high from the starting point complete all as specified and directed by the Engg-in-Charge.

Returning, filling in trenches in soft/loose soil in layers n.exc. 25 cm after laying of cables including spreading, levelling, and well ramming complete all as specified and directed by the Engg-in-Charge.

M&L for sand filling in trenches with clean dry unwashed sand free from sharp particles, gently punning around the cables complete all as specified and directed by the Engg-in-Charge.

Supply and laying brick old size, sub class 'B' brunt bricks laid in trenches as cable cover laid across the cable in trenches complete all as specified and directed by the Engg-in-Charge.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat size 300mmx 180mm x 40mm complete all as specified and directed by the Engg-in-Charge.

M&L Brick work with sub-class 'B' bricks, straight or curved on plan exc 6 m mean radius, built in cement mortar 1:6 complete all as specified and directed by the Engg-in-Charge.

M&L Rendering 15mm thick on fair faces of brick work or concrete surfaces in cement mortar (1:4) finished fair and even without using extra cement complete all as specified and directed by the Engg-in-Charge.

M&L for PCC 1:3:6 type C-2 (using 40 mm gradded aggregate) for foundation, filling and mass concrete etc complete all as specified and directed by the Engg-in-Charge.

M&L for cement concrete type B-2, 1:2:4, 75 mm thick (using 40 mm gradded aggregate) as in floors and paving or similar works complete all as specified and directed by the Engg-in-Charge.

M&L for soil/sand filling under floors or in foundations including watering and consolidation in layers complete all as specified and directed by the Engg-in-Charge.

S&F MS work for post and struts of fencing around RMU/Transformer or similar works incl drilling holes, flat iron, fillet for securing wire mess by welding to angle iron frame and framed work as in gate incl provision of 03 Nos 100mm long hinges and one sliding door bolt of 300mm long for locking arrangement and MS channel for plinth of transformer complete all as specified and directed by the Engg-in-Charge.

S&F 3.15mm dia MS wire mesh of 40x40mm size, made up into mattress or cages appx 2.00 mtr height and fixed with flate iron/angle by welding in position complete all as specified and directed by the Engg-in-Charge.

M&L for 2 coat of synthetic enamel painting over a coat of red oxide to steel surfaces including preparation of surface complete all as specified and directed by the Engg-in-Charge.

Note : contractor should procure and provide 50 % of the material as listed above within 15 days of the placing of work order and shall be verified by the Engr-in-charge.

M P TYAGI ENGINEERS AND CONTRACTORS (BID ID -3144991)

Rajindera Enterprises (BID ID -3145486)

MV Engineers And Contractors (BID ID -3145999)

Commercial Traders (BID ID -3150759)

M/s JAIMAA ASSOCIATES (BID ID -3145873)

Vijay Electricals (BID ID -3144915)