purchase & stores division - ISRO

Master Control Facility – Hassan
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Cable Ducts
Manufactured from high impact rigid PVC, should not peel, chip or break, non
inflammable, warp proof, non-britle, high di-electric strength (36 kV / mm),
Temperature withstand capacity up to 70 degree C, Colour: Grey, Type B
locking, width & deapth of the duct shall be selected according to the
requirement and shall be uniform in size. Make: Salzer / Connectwell / Wago
/ Elmex / Lapp
Cable Ties
Re-usable type, white coloured, Nylon cable ties, Length of the ties selected
according to the requirement. Make: Any Reputed make
Ferrules / Stickers
Ferrules of suitable type, size shall be selected for each cable on both sides
and for terminal blocks. Laminated stickers for marking Circuit breakers /
SDFUs / Fuse links / Terminal blocks shall fixed as per the standard
configuration
Lugs
Suitable insulated coloured heavy duty lugs made of tinned copper shall be
used for control cable / SDFU upto 63A / MCB input output cable terminations
as per the cable size. Make: Dowells/Multi/3D/Jainson
High purity electrolyte Aluminium Busbars
Rating: 2.0 MVA for main busbar, Aluminium bus bar complying to IS 5082
1981, 63401-WP, suitable size and rating for vertical busbar system, suitabl
size Busbar shall be selected for tapping from buabar to switchgears &
switchgear to termination ends, The busbar thickness shall not be more than
8 mm
As
required
As
required
As
required
As
required
MS items, Fabrication, Insulators, Painting, Wiring and Testing as per the
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enclosed technical specification enclosed.
39 Sub-Total A
B LV Busduct Indoor / Outdoor System
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LV Busduct System
Non-segregated, bus ducts having 3 phase & neutral busbars housed in a
common Galvanized zinc sheet metallic enclosure. Degree of protection -
IP54, Outdoor from Transformer (1MVA) to inside the building & Indoor from
building to LT panel. Rating 415V, 2000A , Busbar material -Aluminium,
complying to IS 5082 1981, 63401-WP. Short circuit withstand capacity -50
kA (rms) for 1 sec, Confirming to IEC 439-2, IS-8623-2, Insulation material -
Multi layer class F (155 degree) insulation, Earth busbar -Upto 50 % of
phase cross section can be fitted outside, Enclosure material -1.6 mm CRCA
with epoxy polyester powder coating, Standard accessories to be used as per
the system requirement like, bends, expansion joints, flexible link, phase
cross over, rubber bellow, marshalling cabinet, adopter at transformer and
panel end & wall frame. The exact length of indoor, outdoor bus duct may be
taken at site during panel fabrication.
40a Indoor (15 meters approximately)
40b Outdoor (20 meters approximately)
R Meter
R Meter
Semi Modular substation LT panel –Specification 14