SITC of External Electrical and sub station work in construction of 300 Bedded Satellite Hospital (Phase-I for 150 Beds) at Sanganer Jaipur

For Main LT panel

SITC of IP-43 and general construction confirming to IEC 61439-1&2. type tested assembly (TTA) 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) Panel having short circuit withstand capacity of minimum of 50 kA for 1s (Icw rating) at 415 V, 50 HZ AC supply, Rated Impulse withstand voltage (Uimp) of 12kV for withstanding against transient Over voltage, mechanical impact level of IK10 level and internal arc for 50 kA for 0.3 second with aluminum busbar and fully type tested at an Independent Laboratory, Type test certificate has to be submitted for all rating of LV Switchgear to be used in Panel.

(b) All four Horizontal Busbars shall be in same compartment. Certified design of switchboards shall be proven design from OEM (Switchgear Manufacturer). OEM name should be mentioned on top of each column of switchboard. Also, OEM Partnership Certificate shall be furnished by Panel builder. Panel shall be fully modular with standard OEM designas per latest IEC 61439 Part 1&2 standard

© Panels and cubicles shall be fabricated with CRCA Sheet Steel of thickness, same as as per OEM Design. Sheet Steel having vibration free structure chemically treated with nine tank process before painting for surface treatment and powder coated, with suitable electrolytic grade high conductivity Aluminium busbar extensible type, busbar supports, ( Cost of Bus bar / Flexible wire for Interconnection between Main busbar and Switchgear is to be Paid Extra )

(d)Wiring between components within switchgear and Incoming / outgoing cable shall be done through the terminal block only. Direct connection shall not be permitted. Each terminal block shall be one piece moulded, barrier type, 650 volt grade, complete with washers, heads, studs with two nuts and identification strips and shall have adequate continuous current rating. For tap-offs, adjacent terminals with shorting strips shall be used. 10% Spare terminal blocks shall be provided. Wire identification on marking strip shall correspond to the designation of the wiring diagrams. All wire terminals on the equipment shall also be marked with designation corresponding to those of the wiring 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 Switchgear OEM approved fabricators only. Switchgear OEM Approval in Favour of Panel fabricator for confirmation of IEC 61439 -1&2 with type test certificates to be submitted.