GE ELEC/D-77/2023-24

Amount

Supply,installation,testing & commissioning of transformer step down, outdoor type copper wound 11/0.433 KV, 3 phase, 50 HZ of rating 250 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 wht 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 240 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 ligs,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.

(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 power 12, 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 energy Effeciency level - III

Supply, laying and testing of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts, grade cross sectional area 120 sqmm, 3 core complete all as specified and directed by the Engg-in-Charge.

Supply, fixing and testing 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 120 to 185 sqmm complete all as specified and directed by the Engg-in-Charge.

Supply, laying & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminum conductor of size 240 sqmm 3.5 Core complete all as specified and directed by the Engg-in-Charge.

Supply, laying & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminum conductor of size 120 sqmm 3.5 Core complete all as specified and directed by the Engg-in-Charge

Supply, laying & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminum conductor of size 95 sqmm 3.5 Core complete all as specified and directed by the Engg-in-Charge.

Supply, laying & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminum conductor of size 35 sqmm 3.5 Core complete all as specified and directed by the Engg-in-Charge.

Supply, laying & testing of cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminum conductor of size 16 sqmm 3.5 Core complete all as specified and directed by the Engg-in-Charge.

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 function of switch – disconnector an earthing switch (ii) 11 KV, 630 A Load Breaker Switch with interlocking line -earthing scheme both short circuit current, 21 KA for 3 Sec Making capacity – 50 kAp- 01 No (iii) Auxiliary contacts – 1 NO + 1 NC- 01 No. (iv) Spring assisted motorized mechanism with un-inhabited operating shaft for emergency manual operation with integrated earthing switch – 01 No (v) Cable terminals cable bushing situated not beyond 300 mm or as per OEM tested design from cable cover to allow ease of access for installation/testing) with door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access of size upto 11 KV, 300 Sq mm, 3 Core, along with XLPE AL cable termination / End Kits Each set of 3 (vi) Right angle boots (push on type) Each set of 3

(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 IEC 6123 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 to detection of cable fault – 01 No (x) ON, OFF, Earth mechanical indication on the front mimic of the panel- 01 No Cable cover standard- 01. (xi) Mechanical interlock to be provided between both incmer to prevent simultaneously and accidently closing of both supplies. (B) 02 Nos. Outgoing VCB module each consisting of following accessories :- B) 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 fulfils the operation of the disconnector and earthing function. (ii) 11 KV, 630 Amps Fixed type VCB module with series disconnector cum earthing switch of short circuit breaking current / withstand, 21 KA for 3 Sec Making Capacity – 50 kAp - 01 No (iii) Auxiliary contacts – 1 NO + 1 NC- 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-inhabited operation – 01 No. (v) Cable terminals cable bushing situated not beyond 300 mm or as per OEM tested design from cable cover to allow ease of access for installation/testing) with door arrangement for enhanced safety (IP54+IP3X) interlocked to prevent access up to 11 KV, 300 Sq mm, 3 Core, along with XLPE AL cable termination Each set of 3 (vi) Right angle boots (push on type) Each set of 3 (vii) 3 O/C + 1 E/F self-powered numerical protection relay with low and high set for over current and Earth Fault. Relay should have facilities 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/per VCB outgoing. (viii) Auxiliary Relay for OTI / WTI – transformer protection – 01 No

(ix) Associated ring Core cast- resin insulated CTs Dual Ratio 100/50/1-1 Amp (for metering and protection) for both outgoing 2.5 VA, 5 P 10 Protection – Each set of 3 (x) Arc proof cable covers having cable entry from bottom, front with interlocking mechanism including earth switch – 01 No. (xi) Capacitive voltage indication fixed type system as per IEC 6123 with LED – 01 Set (xii) ON, OFF, Earth mechanical indication on the front mimic of the panel – 01 No (xiii) Emergency trip push button – 01 No. (xiv) CB mechanical operation should be min 10000 Nos without any maintenance. (xv) Vacuum Interrupter and VCB must be RMU manufacturer’s own make for better life cycle optimization. (xvi) CB operating sequence should be O-0.3sec-CO-3min_CO (C) Bus connected, fixed type Potential and Auxiliary transformer with floor mounted compartment of matching height and depth, positioned alongside RMU to provide required aux. supply for spring charging motor and metering, consisting of following accessories:- (i) 1-Ph 11 KV/110V, class 0.5 potential transformer – 03 Nos for metering. (ii) 1-Ph (11 KV/rt3), 230 VAC, 250/500 VA Auxiliary transformer – 01 No for battery charging. (iii) 11 KV Tri vector Energy Meter of Class 0.5 accuracy with RS 485 Communication – 01 No per VCB o/g (iv) 2x12 Volt DC battery 42 AH – 01 Set (v) 230 VAC/24 VDC Battery charger – 01 No, with indication of status of functioning (vi) HRC fuse links for primary side isolation and AC/DC MCBs for secondary isolation – 01 Set (vii) Digital Voltmeter & RYB LED indications to confirm AC/DC supply availability – 01 Set (viii) Anti condensation space heater with thermostat – 01 No (ix) 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 (vi) RMU Foundation as per OEM Recommendation (Earth Work and PCC works) for placing RMU on plinth is deemed to be included in the cost quoted. Height of plinth should not be less than 0.60 mtrs from ground level. 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) The above module consisting of Load break Switches and VCBs shall be aligned appropriately and must have electrical and mechanical interlocking as per latest electrical safety norms including installation on platform as recommended by OEM. (v) The OEM should provide 2 years manufacturing warranty including service support at site without any cost from the date of commissioning of RMU at site. Certificate for the same to be submitted by OEM at the time of delivery. The rate quoted by the bidder shall include the service cost of RMUs and no extra claim shall be entertained at later stage.

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 control board GI pipe light grade 20mm bore for watering funnel with wire mesh PCC chamber pit in PCC 1:3:6 type C-1 incl 40mm thick Precast RCC M-25 cover reinforced 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 incl connected to earthing test point complete all as specified and directed by the Engg-in-Charge including testing on completion. Note :- (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe medium grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip and protection pipe upto 7.5 meter beyond the earth plates electrode.

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

Supply, installing, testing and commissioning of factory made and tested Bus bar chamber outdoor type with canopy made out of 3.15 mm CRCA MS sheet, and 40x40x5mm thick MS angle iron frame work, powder coated finish over one coat of red oxide primer on outside surface and painted inside with two coats of red oxide primer, front opening type, with apron for cable entry closing locking arrangement ,of size 450mm x 450mm x 300mm with 4 Nos 500 Amps aluminium bus bar and with 250 Amp MCCB, 4 pole, 36 KA, 415 Volt 50 Hz including excavation, earth work and platform for the Bus bar chamber 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 sotne aggregate on top and grouting bolts etc for Bus bar chamber. The platform shall be such that it is of a height 45 cm above the nearest road level complete all as specified and directed by the Engg-in-Charge.

Supply and laying GI tubes light grade ISI marked, galvanized of 80 mm bore dia 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.

Supply and laying GI tubes light grade ISI marked, galvanized of 50 mm bore dia 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.

Supply and laying GI tubes light grade ISI marked, galvanized of 40 mm bore dia 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 manual means and suitable for passing of GI pipe from 40 to 100 mm bore dia incl 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 (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.

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.

Removing excavated material (ie soil) from site to a distance n. exc 50 mtrs away and depositing where directed at a level n. exc. 1.5 mtr above the starting point 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. Note:- Punned thickness shall only be measured for payment.

Supply and laying brick old size, sub class 'B' brunt bricks laid in trenches as cable cover 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 for 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 1:2:4 type B-2, 75 mm thick (using 40 mm gradded aggregate) for floors and paving etc complete all as specified and directed by the Engg-in-Charge.

S&F MS work of angles for post and struts of fencing around RMU/Transformer etc incl drilling holes, flat iron, fillet for securing wire mess by welding to angle iron frame and framed work as in gate of angle and wire mess. Door to be fixed by 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 4mm dia MS wire 40x40mm mesh, 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 paint over a coat of red oxide on steel surfaces including preparation of newly surface complete all as specified and directed by the Engg-in-Charge.

S&F MCCB of capacity 160 Amps, FP, 25 KA, 415 Volts 50 Hz, AC, with thermal and magnetic release fixed alongwith Sheet metal enclosures 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 Eng-in-charge

mayur enterprises

Vijay Electricals

Microsys Controls India

Commercial Traders

MV Engineers And Contractors

Rajindera Enterprises

Ridhi engineers and builders

m/s VK construction company