Supply, Installation and Testing and commissioning of 22 KV HTMK (HT Metering Kiosk) 5/5 A CT 0.5 S10 VA and PT 50 VA AT Kesarwadi at GE CME

Supply, install, testing and commissioning inrg of exsisting of 22 KV HTMK (HT metering Kiosk) 5/5 A CT 0.5 S 10VA & PT 50 VA as per MSEB Norm (item code 77009505784-22KV HTMK) including taking down old unsv metering kiosk and setting aside for credit. The metering cubicle shall comprise of rigid welded structural frame enclosed completely by M.S sheets of not less than 2mm thickness. Structural frame and supporting angles shall be of M.S angle of size 50 x 50 x6 mm minimum. all the compartments of the cubicle shall be welded from inside and detachable covers/ components shall be bolted. Bolts with hole shall be provided for seling purpose at opposite corners of the top cover as well as side covers.The fabrication of the cubicle shallbe such that there is no ingressof water. All doors and removable covers (2 no I/C & OG compartment) shall be provided with neoprene gasket 25 mm wide all around them.The width of cover / flange of CT/PT compartment and the metering cubicle shall meet the requirements of IP-55 protection as par IS-12063, if the air-vents are closed. the height of metering cubicle shall be such that. the meter window be at normal eye level. A bottom frame of M S angles shall be provide , duly welded, for mounting the cubicle on the plinth. 2 nos of lifting hooks each of suitable size shall be provided suitably at he top of incoming & outgoing compartment for lifting the cubicle. The metering cubicle shall be painted by powder coating after proper cleaning. The make of HT meter Kiosk shall be norm by MSEDCL all as per their sparately maintain that. The colour shall be LightGray 631 as per IS:5. Finished painted appearance of equipment shall present an aesthetically pleasing appearance, free from dents and uneven surfaces. in order to avoid rusting, automobile grade painting or suitable anticorrosive paint shall be done to cubicle. Silica gel bags to be provided inside the compartment to absorb moisture to avoid flashover complete as per following spcification :- (a) Constructional Features of The Cabinet :- The metering cubicle shall consist of four metal enclosed compartments as follows : (i) CT/PT compartment 1 No. (ii) Cable termination compartment 2 Nos. (iii) Meter compartment 1 Nos. (b) Insulation Material (5/5A, 0.5 S, 10 VA):- (i) Resion Cast Assembly : The resion Cast assembly shall be of a single piece construction without any joint or coupling. (ii) Insulation Material : Insulation Material used for current Transformer should be cycloaliphatic Epoxy Resion cast having insulation class B. The insulation of the current transformers shall be so designed that the internal insulation shall have higher electrical withstand capability than the external insulation. The dielectric withstand values specified in this specification are meant for fully assembled current transformer. The temperature rise on any part of equipment shall not exceed the maximum temperature rise limits specified in relevant IS.(iii) Primary Winding : (aa) Primary winding shall be wound type. The primary winding conductor shall be high conductive (Electrolytic garde) copper without any joint . For primary winding, current densities shall not exceed the limit 1.6A/Sq mm for highest current ratio. (ab) Enamel, if used for conductor insulation, shall be either polyvinyl accetate type or amide type and shall meet the requirements of IS-4800. Polyeter enamedl shall not be used. (ac) The design density for short circuit current as well as conductivity of the metal used for primarywinding shall meet the relevant requirement of IS:16227-2016. (ad) The primary winding shall be designed for extended primary current at 120% of rated primary current. (iv) Secondary Winding : (i) Sutiably insulated copper wire of electrolytic grade shall be used for secondary Windings. (ii) The excitation current of the CT shall be as low as possible. (c) Potential Transformer (50 VA) :- (i) Resin cast Assembly : The resin cast assembly shall be of a single piece construction without any joint or coupling. (ii) Insulation Material :Insulation Material used for Potential Transformer should be Cycloaliphatic epoxy resion cast having insulation class B. The insulation of the potential transformers shall be so designed that the internal insulation shall have higher electrical withstand capability than the external insulation. The dielectric withstand values specified in this specification are meant for fully assembled potential transformer. The temperature rise on any part of equipment shall not exceed the maximum temperature rise limits specified in releants IS. (iii) Winding: Suitably insulated copper wire of electrolytic grade shall be used for secondary windings. type of insulation used shall be described in the offer (iv) lifting arrangement : PT shall be provided with lifting lugs suitably located for easy mounting, dismantling & transportation purpose. The lifting arrangement shall be positioned in such a way as to avoid any damage.

S&F cable end termination, indoor type, heat shrinkable type joint complete with jointing material and accessories suitable for 22 KV, 3 Core 120 to 185 sqmm, XLPE armoured aluminium conductor cable complete.

M&L for earthing complete with copper plate earth electrode 60cm x 60cm x 3.15mm thick surrounded by char coal and salt buried directly in ground vertically in pit of depth not less then 2.25 mtr below ground level with top edge of the earth plate at depth of not less then 1.5 mtr below ground level surrounded from all sides by char coal dust and common salt in alternate layers of 15 cm depth and earth plate electrode commcted to copper strip 20x3mm by means of GI pipe for protection of GI earth lead wire including 20mm dia GI pipe for watering GI funnel, PCC earth pit (1:3:6) type C-2 with CI frame and RCC cover all as shown in electrical Plate No 3 on SSR Part-I including testing complete.

SKS Electricals

M/S EAGLE ENTERPRISES