PROVN OF MOBILE DG SET ALONG WITH ASSOCIATED WORKS AT AF STATION SIRSA UNDER GE (AF) SIRSA

Supply, installation, testing and commissioning of step down, outdoor type distribution transformer, 11/0.433 KV, (400 KVA), Level-2, as per IS 1180 ONAN/ONAF, 3 phase, 50HZ copper wound, two winding, core type transformer as per IS-1180-2014 (Ref to amendment No 4 dated March 2021 to IS : 1180-2014) star vector group & IEC : 76 YNynO, OFF load Tap changer on HV side (+) 5% to (-) 15% in step of 1.25%, outdoor type, HV/LV brass bare bushing condenser type terminations with fitting and accessories as under including first fill of transformer oil complete all as specified and directed by Engineer-In-Charge. Main features of transformer are as follows :- (a) The core shall be of high grade cold rolled grain oriented (C.R.G.O) annealed silicon steel lamination confirming IS 1271 / 1958 secured properly using frames, clamps and bolts, confirming IS 1271 / 1958 secure properly using frames, clamps and bolts. (b) Winding HV & LV winding shall be done using High conductivity Electrolytic copper with insulation F-class grade. (c) Enclosure : Enclosure shall be rectangular and shall be built of electrically welded MS sheet wire mesh or perforated sheet for ventilation and comply with IP 43 protection as per IS: 2147 / IEC 529. (d) Bidirectional mild steel rollers 150 mm diameters and 75mm width- 04 Nos. (e) HV & LV Bushing : Porcelain / Epoxy HV and LV Bushings of appropriate voltage and current rating shall be mounted in HV and LV cable box. The high voltage bushings (3 Nos) shall be provided with R-Y-B colour coding marking & shall confirm to IS 3347. Brass rods 12 mm -03 Nos for HV bushing terminal and tinned copper rods 20 mm -04 Nos for LV Bushing terminals / extension for cable lug connections with necessary nuts, check nuts and plain thick tinned washers. (f) The windings of the transformers shall be connected to delta on primary side and star (Y) on secondary side. The neutral of the LT winding shall be brought out to a separate terminal. The vector group shall be Dyn-11. The transformer should be provided with winding tapped on HV side with number of tapped positions. 7Nos and Voltage variations (+) 5% to (-) 10 % in steps of 2.5% for variation on HV voltage to be changed by means of hand operated "OFF LOAD" tap changing gear switch externally operated with mechanical locking and a position indicator, the winding temperature rise over an ambient temperature of 50 degree Celsius shall not exceed 90 degree Celsius when measured by resistance method i.e. Max temperature of the winding shall not exceeds 140 degree Celsius and losses of transformer as per BCBC norms with Arcing horns for HT Bushings for outdoor type T /F. Note :- Maximum total loss of 400 KVA transformer (Energy Efficiency Level-2) at 50 % load is 1150 watt and 100 % load is 3300 watts. Accessories :-

Accessories :- (i) 7 position OFF circuit Tap changing switch. (ii) Removable inspection opening on top cover (iii) Buchholz Relay double float type with having contacts for alarm & trip and shut off valve. (iv) Oil temperature indicator 150 mm dia with alarm and trip contacts. (v) Winding Temperature indicator with alarm and trip contacts Double Needle Type. (vi) Marshalling box 200 TTB (MK). (vii) Magnetic Oil level Gauge having contacts for alarm and trip. (viii) Pressure release valve (PRV) having contacts for alarm and trip. (ix) Conservator with oil filling hole with cap and drain plug and with built in diaphragm to avoid direct air contact with (x) Oil level indicator with minimum level marking. (xi) Thermometer pockets with thermometer. (xii) 4" Dial type thermometer stem type. (xiii) Silica gel breather. (Xiv) Air release plug. (xv) Lifting lugs 04 Nos for vertical lifting and pulling lugs -04 Nos for horizontal pulling (xvi) Earthing terminals. (xvii) Bi-directional C.I Rollers-04 Nos. (xviii) Name, Rating and diagram plate. (xix) Top filter valve. (xx) Oil drain cum filter valve with plug. (xxi) Jacking lugs. (xxii) Panel (Control/Electrical). (xxiii) Neutral CTs. (xxiv) HV / LV Cable End Box (xxv) Terminal marking plates and rating plates, terminals shall be provided with terminal marking plates. (xxvi) Painting :- The surface of the enclosures shall be properly pre-treated / phosphated in a seven enclosure process and shall end joint for connecting of cable with panel -02 Sets

Supply, installation, commisioning and testing of Diesel Engine driven generating set 250 KVA, 200 KW, 415 Volts, 3 phase 4 wire Engine as per IS: 10001/10002 and alternator as per IS:13364 CPCB-IV+ norms, engine complete with integral acoustic enclosures as per latest Indian Standards of central pollution control board and as alternator with relay,Control panel, sound proof canopy as per manufacturer's instructions complete including the following :-

Engine: (i) 4 Cylinder, In-line 4 stroke. (ii) Turbocharged and intercooled cooling system (iii) Stainless steel exhaust flexible coupling and exhaust pipe (iv) Radiator water cooled (v) Coolant inhabitor (vi) Plate type lubricant oil cooler (vii) Spin-on fileters coolant, fuel & lubricant oil. (viii) Dry type heavy duty replaceable paper element air cleaner with restriction indicator. (ix) Electronic governor (x) Electric starting system (xi) Battery charging alternator. (xii) 12 volts 120 AH/suitable as company design maintanence free battery with multi standared copper cable for connecting wire and terminal complete (xiii) First fill lub oil.

Alternator : (i) Brushless AC alternator, 3 Phase, 415 Volt, 4 Wire, confirming to IS 13364 (I&II) rated for output of 250 KVA,minimum power factory 0.8, 1500 RPM (ii) Voltage regulation plus/minus/+1 percent. (iii) IP- 23 protection with Class 'H' insulation (iv) Flex disc type cupling (v) Automatic voltage regulator. (vi) Noise level 75 dBA @ /meter (vii) Telephone interference factor .50 (viii) Total harmonic factor better than 2% (ix) Supplying power to variable electrical load for unlimited hours. Prime power (PRP) is in accordance with ISO 8523. 10% overload capacity for 1 hours every 12 hours of operation and will be suitable tropical conditions.

Baseframe :- Sturdy, fabricated, welded construction, Iron Base frame for mounting the Engine, Alternator and Acoustics enclosure.

INBUILT AMF Panel :- The AMF panel will be integrated with the DG set homogeneously and completely synchronized and communication compatible, front opening type protection, duly powder coated, with electrolytic grade copper bus bar of appropriate capacity for four poles with all standard switch gear, graphical LCD display & protection, internal wiring of adequate size PVC insulated multi-threaded copper conductor cable etc (Control panel must shows these parameters Current, Voltage, KW, KVA, PF, RPM, Hz, KWH hooter etc. inbuilt provided with microprocessor-based protection unit for Engine alternator.)

Functions :- Complete Auto mains Failure operating system with adjustable time set for change over after Mains. Recovery, Test Mode facility, Emergency stop cooling time, LCD Display & Fault Reset.

Safeties :- Low Lube Oil Pressure , High coolant temprature radiator coolant level, over load under & over voltage, under & over frequency low fuel level, Auto Shut down , visula & Audio Alarm against Fault Power fuses. Control MCBs power contractors For EB & DG power ckt Auxiliary Contactors. Control relays. Current Transformers Aluminium bus bars/ coppers power cable of suitable capacity with incoming and outgoing terminations, Indication lamps for Mains ON, Load on Mains set running , :Load On set & Charging ON. frequency stop- push buttons. SMPS battery charger.

Fuel Tank :- (i) Fuel tank suitable capacity for 12 Hrs on full load with provision for supply and return lines, level indicator, drain valve, cleaning cover, vent pipe & locking devices shall be provided. (ii) Fuel pipe line from fuel tank to FIP of suitable size. (iii) The fuel tank has to be fabricated and mounted in side the cubicle.