PROVN OF STAND BY TROLLEY MOUNTED DISTRIBUTION TRANSFORMER OF CAPACITY 500KVA FOR AREA OF CWE KHUMBATHANG UNDER GE KHUMBATHANG

Amount

Supply and installation ,testing and commissioning of outdoor type mineral oil immersed distribution transformer ISI marked(IS-1180:2014) step down,copper wound having primary side voltage at 11 KV,3 phase and secondary side having 3 phase and neutral(4 wire system),433 volts at 50 Hz frequency of capacity 500 KVA mounted on trolley with following specifications:- (i) No load voltage ratio:11000/433-250 volts (ii) No of phase-Three (iii) Type of cooling-ONAN (iv) Frequency-50 Hz (v) Vector group-DYn11 (vi) Type-Outdoor type (vii) Application of transformer-Distribution (viii) Basic insulation level-75 KV (ix) No of Tap position on HV side(Offload & manual operated)-7 (x) Tapping range:+5% to -10% in steps of 2.5% (xi) Two earthing terminals for body earthing and two additional for neutral brought out on a bushing (xii) Oil level gauge indicating oil level at minimum 30 degree centigrade and maximum operating temperature (xiii) Rating and terminal marking plates (xiv) Lifting lugs

(xv) Dehydrating breather with dehydrating agent (xvi) Cable end box-HV & LV side(Both with brass cable glands) (xvii) Percentage impedance-4.5% (xviii) Oil temperature indicator and winding temperature indicator (xix) Arching horns/Lightening arrestor for HT side-03 Nos (xx)Thermometer pocket with cap (xxi) Conservator with drain plug and a filling hole(1¼” normal size thread) with cover (xxii) Drain cum sampling valve(¾” nominal size thread,IS 554) preferably steel with plug for three phase transformer (xxiii) Pressure release device or explosion vent (xxiv) One filter valve on the upper side of tank (xxv) Unidirection flat rollers (xxvi) Inspection hole (xxvii) First filling of transformer oil of specification as per IS-335 (xxviii) Maximum losses of transformer shall be as per energy efficiency level-3 as per IS-1180(Part-I):2014

(xxix) Altitude of installation- 3200 mtr above MSL(approx). Note: 1. The transformer shall be ISI marked with energy efficiency level-3 category and having BEE certification.Routine and type test certificate(as per IS-2026) shall be produced by the tenderer.Certification from BIS and BEE shall be produced against the manufacturer. 2. Any subsequent amendment to IS or Govt notification on the subject shall be assumed as implemented in the schedule mentioned above on the date of supply without any financial effect. 3. Drawing for the transformer shall be got approved by the GE before placing the order by the contractor. Trolley 4 wheeler of size 3658(L) mm x 1829(W) mm x 1900(H) mm,of weight approx 1760 kg with following specification & details:Main chasis made of MS channel 150x75 mm.Side runner:Side runner and cross members channel made of MS 100x50 mm,100x50 mm.Leaf springs: 4 Nos leaf spring of size 70x11x900 mm,consisting of 13 leaf each.Axle :02 Nos made of 75x75 mm square with water proof steel forged hubs and taper roller bearings.Turn table:02 Nos angle rings 50x6 mm with male female pipe bushes with locking bolt 36 mm.Draw bar: Triangular draw bar detachable type made of MS channel 75x40 mm.Towing arrangement: Spring loaded steel towing hook of 36 mm round.Floor fully covered with 6 mm thick MS sheet.

Landing jacks-04 Nos landing jacks fitted on four corners of the trailor.Roof-Covered with GI sheet & height 4900 mm from the side all to top of the sheet with MS channel 50x6 mm.Carrying capacity-05 Ton(approx).Isolator fuse mounting-63x63x4 mm.Box pipe 50x50x5 mm MS plate 75x38 mm C channel clamp for transformer.Side wall-Side wall height 1900 mm,openable three sides,made of MS welded wire mesh 4 mm and angle 35x5 mm,supported with 40x5 mm MS flat,with danger notice board plate 11 KV HT,suitable enclosure with four pole 63 Amp MCCB to be provided on LV side.Tyre assembly-04 Nos new tyre assembly of size 7.50x16 nylon any standard,make:Ceat,Apollo,JK,MRF.Finishing and painting-Finishing with grinding and one coat red oxide(primer) and two coats of super synthetic enamel paint(Army green colour).Fittings-Necessary fittings like 04 Nos light reflectors,02 Nos number plates of suitable size. Note: (i) All four sides of trolley cage to be provided with danger notice plate for 11 KV HT supply with standard skull and bone sign.The rates for the same will be inclusive in the quoted rate.All side of cage and door /roof top should be detachable type for easy dismantling during maintenance of transformer.Item rate will be inclusive of mounting the transformer on trolley with fixtures and any T&P and labour reqd be provided by the contractor.Before placing the order of trolley,drawing of the same should be approved by GE.

Note for Ser Item no. 1.01 to 1.04 :- (i) In case manufacturers as mentioned in list of makes does not manufacure item as per given description, then items of higher specification will be supplied without any financial adjustment.

M/S Web Company

RND ENGINEERS & CONTRACTORS

MONA GENERATOR SEVICES PVT. LTD.