WBPWD/SEWEC/BED /NIQ-46/2018-19

Amount

Supply and delivery of 400 KVA Dry type transformer as per specification below: (Make: Raychem RPG/Volt amp (Baroda) / ABB/Crompton Greaves) Applicable Standard : IS 11171-1985/IEC60076 with latest modification (if any) & CBIP Specification Rating : 400 KVA, 3 phase, 50Hz, Delta / Star Type : Indoor type, core type cast resin, three phase, copper wound, air cooled dry type. Voltage ratio : 11 KV / 415 Volt Links / Tappings : Off circuit Links, tapping range +5% to -5%, in steps of 2.5% Tap position configuration diagram shall be provided. Cooling : Air Natural (AN) Painting : Epoxy based (shade 632 as per IS - 5 ) Vector Group : Dyn 11 Class of Insulation : Class H Temp. rise : 90° C over ambient of 50°C

Efficiency (Minimum) : % efficiency at 75 degC/ unity P.F. a) At 100 % load : 98.62 % efficiency at 75 degC / 0.8 P.F. a) At 100 % load : 98.28 Transformer losses shall be guaranteed on maximum basis i.e. without any positive tolerance. Impedance : 4.5% (Allowable tolerance as per IS) % Regulation : a) At Unity PF : 1.10 b) At 0.8 PF : 3.40 Testing : All Routine tests as per relevant IS have to be conducted at manufacturer’s works. Terminal arrangement : HV : HV cable box assembly with copper flat & support insulator. LV : LV cable box assembly with copper flat & support insulator.

Enclosure : Sheet steel with protection class IP-43, painting should be eposy / as per latest standard with paint shade 632 of IS-5. Basic level Insulation for HV : 75 KV pk/28KV rms. Temperature Scanner : Provided with 3 RTDS for sensing winding temperatures along with temperature Scanners for display of winding temperature and with Alarm / Trip contacts.

Supply and delivery of 11 KV, 350 MVA, 630 A 3 panel HT Gear with VCBs as per Specification (Make : Siemens / CROMPTON / ABB/L&T) below :- The Vacuum Circuit Breaker should comply to IS 13118, IS 3427, IS 2705, IS 3156, IS 613 up to the latest revision. PANEL :- The HT switch shall be suitable for 11 KV 3 phase, 50C.s A.C. mains power system & of at least 350 MVA breaking capacity. These shall be vacuum circuit breaker type, with vertical / horizontal Isolation Horizontal draw out and totally enclosed metal clad with 4 compartments & made of at least 2.5 mm. CRCA sheet for load bearing members absolutely vermin & moisture proof draw out type with automatic shutters with an arrangement for complete isolation of bars, cable sockets & others live parts etc. when the removable portion is withdrawn. The switches arranged for hand operation through front of the panel push buttons & spring charged mechanisms through an electric motor energized by 230Volt A.C. for closing & 110V D.C for tripping made available from the station 400 volts 3 phase 50 C/s A.C. source, with remote operation compatibility. All trip coils of shunt trip type energized from a suitable Rectifier condenser source.

The shutter shall be gravity operated & the sheet metal gone through 9 tank pre-treatment process, painted with powder coating technology & oven dried. It should be made on bolted structure after shearing, punching & bending in CNC machines. The width of the panel being not more than 650 mm. and it should be extensible type. The panel must have a front door. The complete panel including the door shall be internally arc tested to avoid injury to the operational personnel during short circuit, if any. FRONT DOOR The front of the breaker acting as panel front door is not acceptable. The panel front door should be closed with the breaker in the isolated position. The degree of protection shall be IP-4X which is the highest degree of protection applicable for Indoor switch board as per IS 3427. BUSBAR The main busbars being of 630A and made of Electrolytic grade copper & vertically placed one after another. The busbars should be air insulated but must be HT PVC sleeved & colour coded for R-Y-B. No live parts should be accessible. All joints should covered with monoplast compound Joint shrouds are not acceptable. Earth bar also should be of Electrolytic grade copper.

BREAKER The breaker shall be vacuum circuit breaker with integral truck design & vertical isolation and horizontal draw out type. It should have a robust motorized mechanism. The spring charging cycle should be O-C-O. The VCB should be of single break design & have one vacuum Interrupter per phase. The Vacuum Interrupter should not be of pinch type design., it should be sealed in brazing in a vacuum oven & all the vacuum Interrupters must be segregated in a cast resin housing. The minimum expected operational life of the vacuum Interrupter should be 30,000 mechanical, 10,000 electrical at rated current & 100 at rated short circuit. The breaker should have auxiliary switch with minimum 6 NO + 6 NC. EARTHING Each of the panel having integral earthing facility for cable & busbar side earthing by breaker transfer principle. If integral earthing facility is not available separate earthing truck shall be provided for earthing.

INTERLOCK The panel & breaker must be interlocked so that---  A closed locked breaker can not be inserted into a panel in the SERVICE position or can not be taken out from a panel when in SERVICE position  A breaker can not be operated in between TEST & SERVICE position.  A breaker can not be inserted into a panel in the SERVICE position or can not be taken out from a panel when in SERVICE position without connecting the control circuit.  If earth is provided it shall be mechanically interlocked with the breaker so that both the devices can not be ON simultaneously. CURRENT TRANSFORMER Current Transformer should be tape wound type fastened on a cast resin bar primary for primary current rating as specified to facilitate easy replacement in case of an unforeseen damage during service. Cast Resin encapsulated current transformer is acceptable below 200A. CT with multicore arrangement is acceptable. Metering core should be of Class 1.0& protection core shall be of class 5P10. The CT should have at least 25% over capacity than total connected load. The CT should be capable to withstand the rated full short circuit current for minimum 1 second.

POTENTIAL TRANSFORMER The POTENTIAL TRANSFORMER shall be draw-out type with HRC fuses provided in both the sides of primary & secondary. Line connected PT mounted in a breaker carriage is not acceptable. The POTENTIAL TRANSFORMER shall be cast resin moulded & insulated type, encapsulated & 3-phase type with Y-Y connection. It should be of Class 1.0 with over voltage factor 1.2 continuous for a solidly grounded system. For POTENTIAL TRANSFORMER unearthed system should be rated for the over voltage factor of 1.9 for 8 hours. METER The indicating meters should be MISC type & 96X96 sq.mm. size with 90 degrees scale----Energy meters (KWH Meter) being Digital type. RELAY The protective current & voltage relays being self powered electromagnetic type. Only Schneider / CROMPTON Make (erstwhile English Electric Make) relays are acceptable. TESTING The fully assembled switchboard shall be offered for Routine Testing as per provision of IS standards mentioned above. The manufacturer should submit closing & tripping time curve after testing on a breaker analyzer. For major components like CT, PT, Meters & Relays the routine test certificates of the respective manufacturers need to be submitted.

Installation of 11 KV / 415 volt, 400KVA power transformer incl. carriage to the sub-station building within a lead of 30mtr. by placing in position and fixing after levelling, fitting all components incl. S & F base channels etc.

Installation of 3 panel, cubical type H.T. switch gear with -PT incl. carriage within a lead of 30 mtr. by placing in position, assembling, lining up, levelling and fixing on floor, fitting & checking all instruments, relays correctly set according to requirement.

Supply & laying of 11 KV grade 3 core 240 sq.mm. XLPE (E) HT cable with Al. conductor from consumer's gear to transformer to be laid through masonery trench as per G.S. as per direction of EIC. (Make - NICCO / Polycab/ Havels/Gloster)

Supply & laying of 1.1 KV grade 3.5 core 400 sq.mm. XLPE(A) cable with Al. conductor from Transformer LT side to LT panel to be laid through masonery trench as per G.S. as per direction of EIC. (Make - NICCO / Polycab/ Havels/Gloster)

S & F compression type gland complete with brass gland, rubber ring for dust & moisture proof entry of 3.5 core 400 sq.mm. PVC/A Al. cable incl. finishing the ends by crimping method as per G.S.

Making termination of the 3 core 240 sq.mm. HT cable incl.supply of necy. jointing materials & compound (Heat shrink cable jointing kit of approved make) at switch gear & transformer terminations on H.T. sides incl. testing as per G.S.

Earthing with 80 mm dia GI pipe (TATA-Medium)x 3.0 Mts. long and 1 No. 65 mm x 8 mm galvanized (Hot Dip) steel strip (4 Mts. long), 20 mm dia x 125 mm long galvanized bolt, double nuts, double washers including finishing both ends by making holes etc. and S & F 80 mm dia GI pipe (ISI-Medium) protection (3 Mts. long) to be filled with bitumen partly under the ground level and partly above ground level to an average depth of 6.65 Mts. [For Transformer neutral − (2x2) nos, transformer body − (2x2) nos., consumer & Supply Co. gear − 2x2 nos. LT panel room-2 Nos ]

Extra for providing masonery enclosure on the top of the earth electrode of overall size 86.36 cm x 86.36 cm x 46 cm deep (below Ground level) complete with cemented brick work(1:6) of 25 cm width duly plastered with cement morter (inside) CI hinged inspection cover of size 36.56 cm x 35.56 cm with locking arrangement, GI reducer including drilling of 46 nos. 12 mm dia holes on the GI pipe.

Extra treatment of soil by using salt & charcoal for pipe electrode as to G.S.

Supply & fixing extra earth busbar of galvanized (Hot dip) MS flat 65 mm x 8 mm on wall having clearence of 6 mm from wall incl. providing drilled holes on the busbar complete with GI bolts, nuts, washers, spacing insulators etc. as required .

Insulating the 65 x 8 mm GI flat incl. S&F black heat shrink PVC sleeves etc. The PVC tube sleeve to be inserted on the GI flat and heat shrinked by heating apparatus by skilled technician carefully without damaging the PVC sleeve as per direction of the EIC (for transformer neutral earth bus bar)

S& laying 240 sq. mm. single core multistrand PVC insulated flexible Cu wire in suitable size of PVC flexible pipe (reinforced) from nutral earth busbar to transformer point as required ( to be laid 2 nos. in parallal) (for transformer neutral earthing) (Make - Polycab/ Havels/KEI/Finolex)

Supply & fixing of earth busbar of Galv. (Hot dip) M.S. flat of 50 mm x 6 mm on wall having clearence of 6 mm from wall incl. providing drilled holes on the busbar complete with GI bolts, nuts, washers, spacing insulators etc. as required.

Connecting the equipment body to earth busbar incl. S & F 50 mm x 6 mm galvanized (Hotdip) M.S. flat on Wall/floor woth G.I. saddle as required and making connection to equipments with incl. drilling holes, nuts, bolts & washers as per G.S.

Making testing arrangement and submitting the test report for high voltage testing of specified voltage incl. checking & testing of all HT / LT equipments by authorized firm of Directorate of Electricity & commissioning the installation after obtaining the Approval of Directorate of Electricity.

S & F CO2 fire extinguiser (4.5 kg. capcity) (Surex / Fireshield / Max Well) on wall with necessary MS bracket as per G.S. incl. mending good the damages to original finish.

S & F 9 liter capacity fire bucket on wall with necy. M.S. bracket incl. mending good the damages.

S & F best quality FIRST AID BOX (Al. body) as per PWD specification, complete with all the items as required by rule of sub-station on MS bracket incl. damages to original finish.

S & F 'shock treatment chart' on wall with necessary screws.

S & F 11 KV grade rubber hand gloves.

S & fixing 6' x 3' x 1/2" rubber mat suitable for 11KV sub-station (Best quality & ISI approved).

SITC of L. T PANEL

SITC of floor mounting cubicle type indoor compartmentalized 415 Volt. 50 Hz. dust & moisture proof L.T. distribution panel board fabricated from 16 SWG CRCA sheet with CPRI test certificate. The panel should have adequate strength and space to accommodate the incoming & outgoing witches and bus bars with all inter connections in between the switches & bus bars with solid copper rod / flexible wire of suitable capacity. The panel should be provided with cable alley for facilitating connection of all the incoming & outgoing XLPE cables with termination arrangements by supply & fixing copper terminal bar / bolt of required sizes. The 2 nos. G.I earth bus bar should run along the full length of the panel board. The incoming terminals of ACB & MCCB as well as out going terminals of MCCB should be provided with Extra copper bar of suitable capacity for smooth termination of double feeders. All incoming / outgoing ACB / MCCB / SFU units should have identification as directed by the E.I.C. The panel board should be painted by powder coated paint & the layout diagram of the panel board should be approved by the E.I.C before manufacturing. The panel board should comprise with the followings :

Incoming :-

c) S/F of 415 Volts 630 Amp Breaking capacity 50KA Version C-Power 4 pole draw out with Microprocessor Based SR18G ACB but with castle locking arrangement, as bus coupler including electrical connection with both the bus-bars. (Make – L & T, cat no.- SL96071/Siemens/ABB)----2 Nos

Bus bar chamber :-

b) do-do 1000 Amp capacity 4 bar electrolytic tinned copper bus bar mounted on non-hygroscopic porcelain insulator / hylam sheet having sufficient di-electric strength duly wrapped with colour PVC tapes (Red, yellow, blue & black) for phases & neutral identification and segregated in two (2) equal length by keeping space for suitable accommodation of bus-coupler in the center of BBC.-----1set

c) S/F of 415 Volts 630 Amp Breaking capacity 50KA Version C-Power 4 pole draw out with Thermal-Magnetic Based DN1 ACB but with castle locking arrangement, as bus coupler including electrical connection with both the bus-bars. (Make – L & T, cat no.- SL95361/Siemens/ABB)-----1 nos

Out-Going :-

a) S/F of 415 Volts 630 Amp, TPN SFU with HRC fuses on L.S & N.L.

(Make -L & T, cat no.- SK95521, type FN 630 TPN/Siemens/ABB, --------------1 nos

b) do-do 400Amp TPN, SFU with HRC fuses on L.S & N.L.

(Make – L & T, cat no.- SK95481, type FN 400 TPN/Siemens/ABB) ---2 nos

c) do-do 250Amp TPN, SFU with HRC fuses on L.S & N.L.

(Make – L & T, cat no.- SK95642/Siemens/ABB), type FN 250 TPN) --3 nos

d) do-do 100 Amp TPN, SFU with HRC fuses on L.S & N.L

(Make – L & T, cat no.- SK95568, type FN 100 TPN)------ 2 nos

e) Blank box with suitable arrangement for installation up to 250A HRC SFU ---2 nos

Metering :-

c) 800/5 Amp ratio C.T (Kappa) --6 nos

d) 250 Volts L.E.D (RYB) source indicating lamps with sliding fuses and switches.--6 sets

e) E.I danger board .--2 nos

S & F of 250V 12" sweep 1420 RPM A.C. exhaust fan complete with frame, legs & louver shutter etc. after cutting wall & making hole incl. S & F nut, bolt, washer & fixing the louver shutter and providing necy. length of PVC insulated copper wire for making connection and mending good the damages to original finish. [Make - EPC]

Supply of 250V timer DB(equivalent of 8 way SPN DB in size) with sheet steel enclouser double door type but intermediate sheet not required, phosphitised powder coated, neutral bar, din rail with IP-43 protection comprises with 1 no. 20A/25A DP MCB ('C' curve 10kA) 1 no. 24 hours Analog time Switch with minimum switching time of 15 minutes and 2 no. 25A power contactor, single phaes screw type motor starter (compact-25A-min) complete with internal wiring by suitable size of copper wire(2sq mm & 4 sq mm) including 1 no. toggol switch and provision for earthing attachment including LED indication light for running condition with locking arrangement (make Hager/ABB/siemens)

S & F 6"x4" MS connector box with two nos. 32A cu stud & one no 10A kit kat fuse on the top of the backelite cover.

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