SITC of Transformer and DG set

Core & Coils:-The core shall be built up with high grade, non-aging, low loss, high permeability, grain oriented, cold-rolled silicon steel laminations especially suitable for core material. Grade of core should be M4 or better. The coils shall be manufactured from electrolytic copper conductor & fully insulated for rated voltage, Class F, ONAN. the manufacturer should have in-house core cutting facility & in-house testing facility incl. impulse Generator. Insulating material shall be of proven design & should be selected in such a way that the transformer will be capable of supplying 120% continuous load. Coils shall be so insulated that impulse & power frequency voltage stresses are minimum. Coil assembly shall be suitably supported between adjacent sections by insulating spacers & barriers.Suitable arrangement should be made for connection at LV&HV side through flexible copper jumper connector terminal, porcelain insulator as per latest recomended IS standard. The core and coil assembly shall be securely fixed in position so that no shifting or deformation occurs during movement of transformer or under short circuit stresses. Transformer losses shall be guaranteed as below:- Total loss @ 50% Loading : 2.324 KW (Max) Total loss @ 100% Loading : 6.875 KW (Max)

% Efficiency (Minimum):- a) At Unity PF (i) 99.08% at full load (ii) 99.25% at 75% load (iii) 99.38% at 50% load % Regulation:- a) At Unity PF (i) with full load : 1.49 (Max) % Regulation:- a) At 0.8 PF (iii) with full load : 3.6875 (Max) Termination HV/LV : HV Cable Box with terminals for cable finishing ends of suitable rating. LV Cable Box extended copper bus bar has to be provided for multiple cable finishing of suitable rating. Testing:- All Routine tests as per relevant IS 2026 have to be conducted at manufacturer’s works. The manufacturer should have in-house test facilities and should arrange for type tests i.e. impulse test & temperature rise tests on chargeable basis, if asked for.Terminal arrangement:- HV : cable box ;. LV : LV cable box Enclosure:- Sheet steel with protection, painting should be epoxy / as per latest standard with paint shade 631 of IS-5.Basic Insulation level for HV:- 75 KV pk, class of protection -IP-55

Temperature Scanner:- Transformer will be provided with RTDS for sensing winding temperatures & oil temperature. Dial type temparature measuTransformer will be provided withbukhholtz relay .ring devices for display of oil & winding temparature.

1 no. of 25 mm x 5 mm GI earth strip for earthing, cable gland plates in two halves, din rail for mounting switchgear, metering arrangements, drilling holes, detachable gland plates /knockout plates, providing 50 mm x 50 mm x 5 mm nominal thickness MS angle iron support for ACBs along with horizontal / vertical intermediate MS flat members for stiffening, mounting on MS channel iron framework 100 mm x 50 mm x 5 mm (9.2 kg / metre) for floor mounting of MV panel, providing MS plate, suitable for bottom cable entry, grouting in ground, powder coating, Providing and fixing the following switchgear and measuring instruments, earthing, cartage from fabricator's premises to site of work etc. as required. [ ACBs will be L&T/Siemens/ABB/Havells make all SFU will be L&T/Siemens/ABB/Havells Make. All the other accessories will be ABB/Siemens/L&T/Havells Make and as per manufacturers standard ]

BUSBAR Extensible horizontal and vertical bus bar chamber 3 phase, 4 wire, 440 volts, 50 c/s consisting of electrolytic grade(99.99% Pure) high conductivity Copper bus bars size 100x6mm for phase(horizontal) and 50x6mm for neutral(Horizontal) and 50x6mm vertical bar(phases) and 50x6mm Vertical bar(Neutral) for outgoing feeder with PVC coloured Sleeves with DNC/SMC busbar supports. INCOMER Air Circuit Breaker, Horizontal Manual Draw Out type, 4 pole, 800 Amps, 415 volts, 50 kA for 1 sec rating manually operated with interlocked doors, automatic safety shutters, mechanical ON /| OFF and service test isolated position indicators and frame earthing contact, with microprocessor release for overcurrent, earth fault and short circuit protection, 1 no. independent manual spring closing mechanism, conforming IS 13947 - 2 1993,1 no. shunt trip coil 220 Volts AC, with cable end box of suitable size(For Termination multiple cables indiviual coper Busabar Arrangement). -2 Set (make L&T , Siemens, ABB , Legrand and Havells)

BUSCOUPLER Air Circuit Breaker, Horizontal Manual Draw Out type, 4 pole, 800 Amps, 415 volts, 50 kA(Ics) manually operated with interlocked doors, automatic safety shutters, mechanical ON / OFF and service test isolated position indicators and frame earthing contact, 1 no. independent manual spring closing mechanism, 1 no. shunt trip coil 230 Volts AC,Conforming to IS 13947-2-1993 as ammended up to date.-01 Set(make L&T/ Legrand/ Siemens, ABB and Havells ) Outgoing [ SECTION -I] i) 630 Amps, 415 volts, 4 Pole SFU with 630A HRC fuses and rotary operating handle -02Nos.(Make ABB/Siemens/L&T/Havells) ii)400 Amps , 415 volts, 4 Pole SFU with 400A HRC fuses and rotary operating handle -01Nos.(Make ABB/Siemens/L&T/Havells) iii) 100 Amps , 415 volts, 4 Pole SFU with 100A HRC fuses and rotary operating handle -01Nos.(Make ABB/Siemens/L&T/Havells) iv) 63 Amps , 415 volts, 4 Pole SFU with 63A HRC fuses and rotary operating handle -01Nos.(Make ABB/Siemens/L&T/Havells)

Outgoing [ SECTION -II] (all make of SFU will be L&T/Siemens/ABB/havells) i) 630Amps, 415 volts, 4 Pole SFU with 630A HRC fuses and rotary operating handle-02 Nos. ii) 400Amps, 415 volts, 4 Pole SFU with 400A HRC fuses and rotary operating handle -01Nos. iii)100 Amps, 415 volts, 4 Pole SFU with 100A HRC fuses and rotary operating handle- 01Nos. CONTROL & ACCESSORIES (i) Load Manager Class 1.0 accuracy Load Manager 3 Ph 4 W 240V 5A with RS 485 port (For measurement of V, A, P, kw, kWh ) with 3 nos. 800/ 5 Amps bar primary type CTs 15 VA burden Class 1.0 accuracy, and 3 nos. back up 2 Amps HRC fuse or SPMCBs 10 kA breaking capacity-02 Sets (ii) 3 nos. phase Indication lamps LED type in RYB colours with toggle switches and 3 nos. of2 Amps back up HRC fuse or SPMCBs 10 kA breaking capacity, 1 no. breaker ON indication lamp. fuses, circuits as per standard practice, auxiliary contacts for positive interlocking of the breakers as required - 02 Sets (iii) Electrical interlocking through axiliary contacts in ACBs and mechanical interlocking with 3 castles and 2 keys for 2 nos. incoming ACBs and Bus Coupler ACB to ensure that only one supply is available at any time on each section of the bus and to eliminate any possibility of accidental approaching of two supplies at one bus section- 01 set

Making testing arrangement , submitting the test report & preparation of layout drawing of the HT installation as par requirement of Lisencing board, arrangement of 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.The scope shall be also included the necessary approval from Authority also. Cost of applying for approval of above HT Installation from licensing Board and submiting the approval.