Replacement of damaged cables and lights, repairing of DG set panel etc. at Nahargarh Fort, Jaipur.

SITC of IP-42 and general construction confirming to IS:8623 : 1993, wall/ free standing floor mounted dust and vermin proof compartmentalised cubical panel as specifications and Other parameters required as per point (a) ,(b), (c),(d), (e), (f), (g), (h) as below:-

(a)Thickness of CRCA sheet shall not be less than 1.6mm up to 450 mm leneth/ width of anycompartment and be 2.0 mm above 450 mm, loadbearing structure shall be 2.0 mm thick sheetsupported by base M.S, channel if required, cablealley compartments having concealed hinged typedoors with key type lock with / without detachableextension type structure. Removable 3 mr. thicksheet steel gland plates with appropriate size ofknockouts for cables shall be provided

(b)Complete panel shall undergo a process ofdegreasing, Water rinsing, Activation, derusting,pickling in acid bath, phosphatising & shall besubjected to nine tank process and then Powdercoated with approved shade of minimum 70microns on both side (Inner & Outer side) of panel.The panel having PE foam/ Neoprene rubber gasketof not less than 3mm thickness ,required hardware, concealed hinged door with key type lockingarrangement for equipment/switchgear earthedwith 2.5sq.mm braided copper wire.

[c) Interconnection between bus bar and switchgears/cable shall be rigidly supported and made out byflexible copper wires (up to 63 amp }) and by solidbus bar (>63 amp }. control wiring will be carriedout with 1.5 Sq.mm, Earth wire with 2.5 Sq.mm andCT with 2.5 sq.mm flexible copper wire only. Alljoints / interconnections of copper bus bar shall bedully tinned . Clearance between main bus bar andrisers / metal parts shall be at least 10 mmadditional to width of bus bar Bus bar is insulatedby Heat Shrinkable sleeves . Earth and Neutral busbar shall be half of the size of phase bus bar. ( Costof Bus bar / Flexible wire for Interconnectionbetween Main bus bar and Switchgear is to be PaidExtra }

(d)Wiring between components within switchgear andIncoming / outgoing cable shall be done throughthe terminal block only. Direct connection shall notbe permitted. Each terminal block shall be onepiece molded, barrier type, 650 volt grade,complete with washers, heads, studs with two nutsand identification strips and shall have adequatecontinuous current rating. For tap-offs, adjacentterminals with shorting strips shall be used. 10%Spare terminal blocks shall be provided. Wireidentification on marking strip shall correspond tothe designation of the wiring diagrams. All wireterminals on the equipment shall also be markedwith designation corresponding to those of thewiring diagram..

(e)All wiring shall be enclosed in plastic channels and neatly bunched and closed in metering chamber, Wiring between terminals of various devices shall be ‘point to point’ (no wire splitting or tee connections) with wires neatly trucked along the back of the panels, adequately supported to prevent sagging.

(f)Floor mounted panel shall be mounted on Base frame of ISMC channel size 100 x 50 x 5 mm ( to be paid Extra )

(g) Tests: The insulation resistance (with 1000 V Megger) and High voltage Power frequency test (by applying a voltage of 2.5KV for one minute) shall be measured between phases, between phase and neutral and between phase and earth. both before and after high voltage power frequency test. The insulation resistance shall not be less than three megaohm. CT Secondary current injection test shall also be carried out.

(h) only outer surface area on all sides shall be measured & panel to be fabricated only from CPRI approved fabricator only (CPRI type Testcertificates for Temp. rise test, Short circuit test for50 kA and IP test is to be submitted)

Supplying and fixing of Aluminium (IEC 60105 ISO 209-1,2) / Copper (IEC 60028) bus bar by means ofSMC / DMC type insulator, with short circuitwithstand capacity of 31 MVA for 1 Sec. , hightensile nuts and bolts spring washers in existingpanel including bending , cutting in required shapeand size and colour coding with heat shrinkablePVC sleeves.