PROVN OF 500 KVA TRANSFORMER TO NEW AC PLANT CHILLER AND AUXILARIES AT HQ DGIS AND PROVN OF 11 KV RING MAIN UNIT OF DISTRIBUTION ALONGWITH CONNECTED ACCESSORIES FOR DGIS IN THE AREA OF AGE U ELECT SUPPLY NO III UNDER GE (U) ELECT SUPPLY DELHI CANTT10

Amount

Supply & install ,testing and commissioning of transformer step down, outdoor type copper wound 11KV/433 Volts (at no load) AC 3 phase 50 Hz 500 KVA capacity, core type, oil immersed naturally air cooled, oil natural air natural (ON AN) , with external cooling tubes/fins, 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 at +5% to 10% in steps of 2.5% on HV side to be changed by means of hand operated off load tap changergear. 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 continuous 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 60076and 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 50x6mm 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 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 energy Effeciency level - II. NOTE :- The above rate includes necessary Brick masonary , PCC & RCC work for the installation of transformer as directed by Engg-Charge at site.

Supply & Laying of 11 KV HT undergoround cable of size 3 core 120 sqmm complete all as specified and as directed

Supply and fix cable end jointing kit for 11 KV grade cable for outdoor terminal heat shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured, AI conductor cable of size 120 TO 185 sqmm outdoor type all as specified. Note:- (a) Excavation, earth work, sand cushioning, brick protection, protection pipe shall be measured and paid saperately.

Supply and lay 240 Sqmm 3 1/2 core cable XLPE insulated armoured heavy duty electric cable with aluminium conductor 1100 volts grade ISI marked as per IS 7098-I laid in trenches ducts or fixing or passing through GI pipe across the road/path/drains/along wall/floor/equipment etc including taking out old unserviceable cable complete all as specified and as directed.

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth for foundation, laying of pipe etc and not exceeding 10 sqm on plan for manhole etc and getting out in soft/loose soil, complete all as specified and directed.

Returning , filling in , with approved excavated soil including spreading levelling watering and well ramming in layers not exceeding 25 cm thick complete all as specified and directed.

Removing excavated material (soils) to a distance not exceeding 50 mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and directed.

Supplying and laying un-reinforced precast concrete cable cover, class class HV, Type 1, flat, size 300mmx l80mm x 40mm

Supplying and laying sub class B bricks having minimum compressive strength of 75 kg/cm2 and of size 230mm x113mm x75 mm

M&L for dry sand cushioning to under ground electric cable on layer of 08 cm thick before laying the cable and second layer of 15 cm thick after laying the cable all as specified in clause 19.75 of M.E.S Schedule Part-I

Supply and laying galvanised iron pipe 80 mm bore light grade fixed to poles with steel clamps laid under road crossing, fixed to wall etc complete all as specified (Note clamps shall be measure and paid separately)

Earthing complete in replacement with galvanised steel earth plate electrode 60 cm x60 cm x 6 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level ,connected to and including galvanised iron earth wire 32 X 6 mm by means of nut, bolts, check nuts and washers of galvanised iron or steel and provision of charcoal dust and common salt packed all around the earth plate including necessary excavation and earth work in soft/loose soil and testing complete all as specified and directed and shown in electrical plate number 3 of MES SSR part-I(1991) (a) Excavation and earth work for drilling hole for electrode in soft/loose Soil. (b) PCC pit in cement concrete 1:2:4 type B-1, Pre cast RCC cover with suitable handle 40 mm thick in PCC 1:2:4 type B-1, reinforced with welded steel wire fabric weighing not less than1.87 Kg/ Sq meter. (c) Funnel with watering pipe of GI 20 mm nominal bore light grade and lugs etc complete all as specified and directed (d) 40 mm nominal bore medium grade GI protection pipe for protection of earthing lead complete all as specified and directed. (e) Requisite quantity of common salt and charcoal. (f) Testing of earthing.

M & L for GI earth strip of size 32 x 6 mm laying in trench, fix to pole with necessary clamp and nut, bolt etc including taking out of unsv earth wire.

Boring of holes under road, pavement, hardstanding by manual system including HDPE pipe of 150 mm dia suitable for 0.4 mpa working pressure

Cutting of road /Hard standing to a size of 30 cm in width and not exceeding 90cm in depth for laying of protection pipe /cable including spreading, leveling, watering and well ramming in layers and providing PCC in 1:2:4 type B1 using 20mm graded stone aggregate, for the top 100mm layer, complete all as specified and directed.

Material & labour for complete dismantling of the existing 4/6 pole structure complete with all accessories & removing of the HT 11 KV cables from the circuit carefully for reconnection also supplying , installation, testing and commissioning of 11 KV, 630 Amps having short circuit capacity 20kA/3-sec, Outdoor (IP54), RMU (Ring main unit) 5-way comprising of 02 Nos motorized operated Load Break Switch and 03 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) 03 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 100/1 Amp , 2.5 VA, 10P10 for protection - 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) Voltmeter & RYB LED Indications to confirm AC/DC supply availability-01 Set (vi) Anti-condensation space-heater-01 No (vii) CFL 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 construction of foundation including construction material, necessary earth work and excavation in soft/loose soil as per manufacturer design for RMU complete all as required at site are deemed to be included in the quoted rate.

Material and labour for complete removal of existing 3 core 185 sqmm HT cable burried / laying in ground / on 4 pole structure by excavation safely without damaging the HT cable and securing safely and relaying back to new porosed excavated trenches

S&F straight through joint heat shrinkable type suitable for HT UG cable XLPE insulalted 3 core x 185sqmm 11000V grade including preparation complete all as directed (Make: REPL/ Denson).

Material and labour for providing galvanised chain link fencing of mess size 50x50mm with 5mm dia, height 2 metre from GL right around the 11 KV RMU/ transformers structures/DG sets fixed to vertical post of MS angle of size of size 60 x 60 x 6mm thick duly painted with a coat of red oxide and two coats of synthetic enamel paint embedded in PCC 1:3:6 type C2 block of size 30cmx 30cmx 45cm at span of every one metre distance around along with 1 mtr width hinged gate fabricated with angle iron of size 50x50 5mm and providing of slag brickwork of 1.5 feet height from Ground level with proper basement along with perimeter of the fencing and plastering the surface with1:6 ratio around the fencing complete asspecified by the engineer 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

M/s ELECTROSHINE ENGINEERS

Vijay Electricals

Leo Network power systems

M/s Dharya Enterprises

Water Power Engg. Enterprises

MV Engineers And Contractors

Commercial Traders

Buddham Builders

M/s Adhikari construction co.

Ridhi engineers and builders